New Advances in Mining Technology

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30 July 2025

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30 September 2025

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Topic Information

Dear Colleagues,

The mining industry plays a vital role in the global economy. Today, more than 92% of the world's primary energy, 80% of industrial raw materials, and 70% of agricultural production means are derived from mineral resources. This Topic aims to highlight the current state of knowledge on the new advancements in mining technology, including case studies of specific mining projects and the development of new technologies and practices. This Topic will cover a range of topics related to mining technology including, but not limited to, new mining equipment, mining materials, and safety technologies, as well as social and economic impacts. By highlighting the development of new mining technologies and practices, this Topic hopes to contribute to a more sustainable and responsible mining industry.

Potential topics include, but are not limited to, the following:

• Automated and intelligent mining equipment;
• Mining technology of complex and difficult mining body;
• New low-cost mineral materials;
• New technology of mining safety management;
• Mining waste management and remediation;
• Social and economic impacts of mining industry;
• Sustainable mining practices and environmental regulations;
• Case studies of successful modern green mines.

Dr. Shuai Li
Prof. Dr. Xinmin Wang
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Applied Sciences applsci	2.5	5.3	2011	18.4 Days	CHF 2400	Submit
Energies energies	3.0	6.2	2008	16.8 Days	CHF 2600	Submit
Minerals minerals	2.2	4.1	2011	18 Days	CHF 2400	Submit
Processes processes	2.8	5.1	2013	14.9 Days	CHF 2400	Submit
Resources resources	3.6	7.2	2012	26.1 Days	CHF 1600	Submit

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Published Papers (14 papers)

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17 pages, 6661 KiB  

Open AccessArticle

The Recent Progress China Has Made in Mining Method Transformation, Part I: Shrinkage Method Transformed into Backfilling Method

by Shuai Li, Lifeng Yu, Zhenyu Dan, Tubing Yin and Junyu Chen

Appl. Sci. 2024, 14(21), 10033; https://doi.org/10.3390/app142110033 - 3 Nov 2024

Cited by 1 | Viewed by 1681

Abstract

The shrinkage method is one of the earliest and most widely used mining methods in China’s underground mines, but shrinkage mining is often accompanied by a number of problems and safety hazards. With the continuous improvement of the filling process and filling material [...] Read more.

The shrinkage method is one of the earliest and most widely used mining methods in China’s underground mines, but shrinkage mining is often accompanied by a number of problems and safety hazards. With the continuous improvement of the filling process and filling material preparation and transportation technology, the application of trackless equipment such as drill jumbo and LHD (Load-Haul-Dump), and the continuous promulgation of mine safety and environmental protection policies, a large number of mines have transformed from the shrinkage method to the filling mining method. Suichang Gold Mine has improved its technical and economic indexes after transformation from the mine shrinkage method to the filling method. Its daily production capacity has increased from 30 t/d to 110 t/d, the dilution rate has decreased from 40% to 10%, the comprehensive recovery rate has increased from 95% to 98%, and the cost saving and revenue increase in the middle section of the test area of +180 m~+240 m has totaled 18,151,000 RMB. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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17 pages, 7279 KiB  

Open AccessArticle

The Recent Progress China Has Made in Mining Method Transformation: Part II Sublevel Caving Method Transformed into Backfilling Method

by Shuai Li, Zhenzhong Xiang, Zhenyu Dan, Tubing Yin and Junyu Chen

Appl. Sci. 2024, 14(21), 9732; https://doi.org/10.3390/app14219732 - 24 Oct 2024

Cited by 1 | Viewed by 1477

Abstract

As the world’s largest resource production and consumption country, China is rich in mineral resources, but its per capita occupancy is lower than the world average. In this context, mining enterprises need to choose efficient, green, and safe mining methods. The backfilling method [...] Read more.

As the world’s largest resource production and consumption country, China is rich in mineral resources, but its per capita occupancy is lower than the world average. In this context, mining enterprises need to choose efficient, green, and safe mining methods. The backfilling method has been paid more and more attention in domestic mines because of its remarkable advantages in controlling ground pressure, reducing ore loss and dilution rate, and protecting the surface. Due to the high cost of land acquisition and the difficulty of tailing reservoir construction in Luohe Iron Mine, after careful consideration, the sublevel caving method is abandoned and the suitable filling mining method is explored. By using the finite element analysis software MIDAS GTS NX 2019 to simulate the stress and deformation of the stope roof and backfill under different stope structural parameters, the stope structural parameters that meet the mining technical conditions of Luohe Iron Mine can be determined, and combined with the actual mine conditions, the sublevel open stope subsequent filling method is finally adopted. The practical results show that after the transformation of the mining method, the economic and environmental benefits of the mine exceed expectations. This paper aims to show readers the latest progress in the transformation of mining methods in China and provide a useful reference for similar mining method transformation at home and abroad. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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22 pages, 11535 KiB  

Open AccessArticle

Research on “Playing Football” Type Roof Control in Fully-Mechanized Mining Face with a Super-Large Mining Height under the Background of 5G+ Big Data

by Jianyu Liu, Fukun Xiao and Lei Shan

Appl. Sci. 2024, 14(19), 9100; https://doi.org/10.3390/app14199100 - 8 Oct 2024

Viewed by 852

Abstract

With the increase of mining height at the working face, the influence range of roof fractures in the goaf increases, the advanced supporting pressure on the coal wall increases, ground pressure becomes more intense, and roof support becomes more difficult. Based on the [...] Read more.

With the increase of mining height at the working face, the influence range of roof fractures in the goaf increases, the advanced supporting pressure on the coal wall increases, ground pressure becomes more intense, and roof support becomes more difficult. Based on the analysis of ground pressure behavior in the first mining and caving stage, the normal mining stage, and the final mining breakthrough stage of the fully-mechanized mining face near 12,404, the relationship between conveyor current and coal speed is studied and compared. Based on the intelligent control system of the fully-mechanized mining face with a super-high mining height of 12,404 and the structure of the football team, the “playing football” roof control mode of the fully-mechanized mining face with super-high mining height under the background of 5G+ big data is put forward. The conclusions are as follows: In 12,404, the ground pressure was first mined. During normal mining, when the roof with a buried depth of more than 200 m is broken, the speed of the coal machine is kept within 12 m/min, and the full guard defends and controls the roof, pulling the lead frame through the area with severe ground pressure. When the roof is good, it is necessary to speed up the coal cutting and get rid of the pressure. When it is less than 200 m, it will overcome the local weighting, and show an offensive trend to speed up and increase production. In the final mining breakthrough stage, the speed of the coal machine should be controlled within 8 m/min, with attention to defense, guarding against roof leakage, and reducing waste rock. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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28 pages, 6195 KiB  

Open AccessArticle

Evaluating Swarm Robotics for Mining Environments: Insights into Model Performance and Application

by Joven Tan, Noune Melkoumian, David Harvey and Rini Akmeliawati

Appl. Sci. 2024, 14(19), 8876; https://doi.org/10.3390/app14198876 - 2 Oct 2024

Cited by 3 | Viewed by 1799

Abstract

The mining industry is experiencing a transformative shift with the integration of automation, particularly through autonomous haul truck systems, and further advancements are anticipated with the application of swarm robotics. This study evaluates the performance of four swarm robot models, namely baseline, ant, [...] Read more.

The mining industry is experiencing a transformative shift with the integration of automation, particularly through autonomous haul truck systems, and further advancements are anticipated with the application of swarm robotics. This study evaluates the performance of four swarm robot models, namely baseline, ant, firefly, and honeybee, in optimizing key mining operations such as ore detection, extraction, and transportation. Simulations replicating real-world mining environments were conducted to assess improvements in operational efficiency, scalability, reliability, selectivity, and energy consumption. The results demonstrate that these models can significantly enhance the precision and productivity of mining activities, especially in complex and dynamic settings. A case study of the Pilbara iron ore mine in Australia is presented to illustrate the practical applicability of these models in an actual mining context. The study also highlights specific enhancements in each model, including role specialization in the ant model, advanced communication in the firefly model, and improved localization combined with hybrid control in the honeybee model. While the honeybee model showed superior performance in high-precision tasks, its reliability was limited under high-error conditions, and it faced a computational resources bottleneck in large-scale operations, highlighting the need for further development. By evaluating these models against performance criteria, the study identifies the most suitable swarm models for various mining conditions, offering insights into achieving more sustainable, scalable, and efficient mining operations. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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20 pages, 6175 KiB  

Open AccessArticle

Study on the Fracture Evolution Characteristics of Overlying Strata in a Fully Mechanized Mining Face with a Large Mining Height Based on a Three-Dimensional Large-Scale Physical Simulation Experimental System

by Zongyong Wei, Yucai Yin, Botao Li, Shugang Li, Haifei Lin, Peng Xiao and Yang Ding

Processes 2024, 12(10), 2087; https://doi.org/10.3390/pr12102087 - 26 Sep 2024

Viewed by 741

Abstract

To investigate the evolution characteristics of overlying rock fractures, based on a geological prototype of a large-height comprehensive mining face in Shanxi, a three-dimensional large-scale physical similarity model was established. The experiments were carried out using microseismic monitoring and physical model cutting methods [...] Read more.

To investigate the evolution characteristics of overlying rock fractures, based on a geological prototype of a large-height comprehensive mining face in Shanxi, a three-dimensional large-scale physical similarity model was established. The experiments were carried out using microseismic monitoring and physical model cutting methods to study the activity and fissure evolution of the overburden rock. Model cutting revealed that, approximately 65 m from the bottom of the coal seam, delamination occurred, marking the top of the overburden rock fissure zone and the bottom of the bending and sinking zone. At 25 m from the coal seam bottom, the rock layer was highly fragmented, forming the collapse zone, which was 4.8 times the mining height. Between 25 and 65 m from the bottom, a fissure zone existed, which was 12.5 times the mining height, with abundant delamination fissures at the top of the fissure zone. Significant microseismic events were observed as the coal face advanced to 45 m, with notable increases in the concentrations and distribution ranges of these events in both the strike and height directions of the coal seam. The subsidence range of the overlying rock layer expanded from the top to the bottom, with the subsidence slope area extending gradually and the central compaction area remaining relatively flat. The overall shape presented an irregular ellipse, with peripheral uplift phenomena observed in the subsidence area. At 39 m from the coal seam bottom, the maximum subsidence of the rock stratum was 4.0 m, with subsidence amounts decreasing with increasing stratum height. Fissure density along the coal seam inclination and direction exhibited a double hump pattern, with fissure areas on both sides showing high densities and the central compaction areas having low densities. Coal seam mining caused stress redistribution in the surrounding rock layer, and the stress in front of the work was divided into the stress reduction zone, dynamic influence zone, mining influence zone, and unaffected zone. Coal rock porosity under high stress was less sensitive to stress changes, resulting in smaller changes in fissure permeability and fissures remaining mostly closed. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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14 pages, 3804 KiB  

Open AccessArticle

Study on the Effects of Microwave Heating Time and Power on the Mechanical Properties of Cemented Tailings Backfill

by Pengchu Ding, Shiheng Yan, Qinqiang Guo, Liwu Chang, Zhen Li, Changtai Zhou, Dong Han and Jie Yang

Minerals 2024, 14(9), 944; https://doi.org/10.3390/min14090944 - 15 Sep 2024

Cited by 2 | Viewed by 1271

Abstract

With the escalating demand for advanced and eco-friendly processing technologies in mining engineering, the potential applications of microwave heating technology in the treatment of cement tailings backfill (CTB) are expanding significantly. This research comprehensively investigates the mechanisms through which microwave irradiation duration and [...] Read more.

With the escalating demand for advanced and eco-friendly processing technologies in mining engineering, the potential applications of microwave heating technology in the treatment of cement tailings backfill (CTB) are expanding significantly. This research comprehensively investigates the mechanisms through which microwave irradiation duration and power influence the mechanical properties of CTB with varying concentrations and cement-to-sand ratios. The aim is to reveal the influencing patterns through experimental methods, providing scientific evidence for optimizing CTB treatment processes. This paper conducted microwave heating tests, uniaxial compression tests, and SEM-EDS tests on CTB. The research results indicate that heating time and power significantly enhance the early strength of CTB, with a more pronounced effect on CTB with higher concentrations and higher cement–sand ratios. When the heating time is 7 min and the heating power is 340 W, the cement hydration reaction is maximally promoted, thereby increasing the density and strength growth rate of CTB. However, excessively long heating time or overly high heating power may cause microcracks or thermal stress concentration within the CTB, adversely affecting the strength growth rate of CTB. Optimal thermal exposure duration and microwave power settings facilitate the activation of cementitious materials and the nucleation of calcium-silicate-hydrate (C-S-H) phases, thereby accelerating the compressive strength evolution of cemented tailings backfill (CTB). The outcomes of this research offer valuable insights into the deployment of microwave heating methodologies in underground mine backfilling, which are pivotal for augmenting the economic viability and environmental sustainability of mining operations. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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19 pages, 11091 KiB  

Open AccessArticle

Failure Characteristics and Cooperative Control Strategies for Gob-Side Entry Driving near an Advancing Working Face: A Case Study

by Wenda Wu, Tianchen Wang, Jianbiao Bai, Jinhu Liu, Xiangyu Wang, Haiyun Xu and Guorui Feng

Processes 2024, 12(7), 1398; https://doi.org/10.3390/pr12071398 - 4 Jul 2024

Cited by 43 | Viewed by 1308

Abstract

Gob-side entry driving near an advancing working face can improve the recovery rate of coal resources and keep the balance between mining and development. However, the large displacement of the gob-side entry caused by the mining dynamics of abutment pressure challenges the safety [...] Read more.

Gob-side entry driving near an advancing working face can improve the recovery rate of coal resources and keep the balance between mining and development. However, the large displacement of the gob-side entry caused by the mining dynamics of abutment pressure challenges the safety and processes of coal mining. This article takes the 15102 tailentry of Xizhang Coal Mine in Changzhi City, Shanxi Province, as an example to study the stability of the coal pillar and the failure characteristics of the surrounding rock and proposes cooperative control strategies of surrounding rock stability. Field tests indicated that when the coal pillar width was 15 m, the displacements of the entry floor, roof, coal pillar side, and solid coal side were 1121 mm, 601 mm, 783 mm, and 237 mm, respectively. A meticulously validated numerical model, incorporating a double-yield model for the gob materials and calibrated parameters, was developed to investigate the stress changes and yield zone distribution across the coal pillar with different sizes. The results of the simulation indicate that the influence range of the dynamic abutment pressure caused by mining in the upper section of gob-side entry driving is 30 m ahead and 70 m behind. When the coal pillar width increases from 7 m to 20 m, the internal stress of the coal pillar increases continuously, while the internal stress of the solid coal decreases continuously. It is estimated that the reasonable coal pillar width should be 7 m, which is subjected to a lower load. The cooperative control strategies comprising a narrow coal pillar, hydraulic fracturing roof cutting for pressure relief, and entry dynamic support were proposed and applied in the 15103 tailentry. The final displacements of the floor, roof, coal pillar side, and solid coal side were 66.01%, 62.06%, 61.05%, and 63.30% lower than that of the 15102 tailentry in the same period, respectively, which effectively controlled the stability of surrounding rock. In addition, this finding for the gob-side entry driving near an advancing working face in this study can potentially be applied to other similar projects. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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19 pages, 8627 KiB  

Open AccessArticle

Permeability Effect and Nonlinear Coupling Characteristics of Rock–Soil Interaction with Water

by Ning Liang and Ziyun Wang

Processes 2024, 12(4), 828; https://doi.org/10.3390/pr12040828 - 19 Apr 2024

Viewed by 1267

Abstract

The seepage effect of rock and soil in the process of encountering water follows a nonlinear coupling law between water and rock. According to the permeability of rock and soil during softening with water, changes in particles in rock and soil are related [...] Read more.

The seepage effect of rock and soil in the process of encountering water follows a nonlinear coupling law between water and rock. According to the permeability of rock and soil during softening with water, changes in particles in rock and soil are related to permeability mechanisms. Based on the assumption of connection between particles in rock and soil, changes in particles before and after water infiltration, the mechanism of water–rock interaction, and the damage to rock and soil are analyzed herein. Combined with fractal theory and percolation theory, the random failure characteristics and nonlinear behavior of water in rock and soil are studied. At the same time, with the help of Fluent 17.0 software, the seepage process of rock samples in water is numerically simulated and analyzed. Taking the permeability coefficient of rock samples, the mass flow rate of water, and the internal pore water pressure of rock samples as tracking objects, it is found that there are obvious nonlinear characteristics in the process of water–rock interaction. The seepage–stress coupling between water and rock forms negative resistance to water seepage. The water infiltration is a slow and then accelerated process and tends to be stable. Research has shown that the coupling effect of seepage between water and rock increases the damage inside the rock and soil, and its permeability fluctuates randomly at different time steps. This feature is a common manifestation of fractal properties and percolation within rock and soil particles. At the same time, there is a non-equilibrium variation law of pore water pressure inside the rock and soil. This leads to a continuous strengthening of the seepage effect, reaching a stable state. The results of this study are crucial. It not only reveals the mechanism of interaction between water and rock but also correlates the degree of internal damage in rock and soil based on the seepage characteristics between water and rock. The conclusions can provide some reference value for relevant construction methods in the analysis of the formation of water flow characteristics, the prevention of rock slope seepage disasters, and the control of water inrush in tunnel excavation. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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12 pages, 3091 KiB  

Open AccessArticle

Design of Unmanned Road Widths in Open-Pit Mines Based on Offset Reaction Times

by Liu Han and Peng Liu

Appl. Sci. 2024, 14(7), 2995; https://doi.org/10.3390/app14072995 - 2 Apr 2024

Cited by 1 | Viewed by 1656

Abstract

In an effort to enhance the efficiency and safety of open-pit mines, this study explores the optimization of end slope road parameters and slope structures, specifically focusing on unmanned driving lanes. A significant aspect of the study is the development of a truck [...] Read more.

In an effort to enhance the efficiency and safety of open-pit mines, this study explores the optimization of end slope road parameters and slope structures, specifically focusing on unmanned driving lanes. A significant aspect of the study is the development of a truck trajectory offset model, which considers the different reaction times between automated sensors and human drivers in adapting to environmental changes. To test these concepts, the study uses numerical simulations to confirm the stability of the proposed end slope designs. Using Victory West Mine No. 1 as a case study, the research determines the optimized width for unmanned driving lanes and the maximum angle for the safe steepening of end slopes. The findings indicate that the optimized unmanned lane width for NTE240 mining dump trucks is 1743 mm, allowing for a 2-degree increase in the slope angle at the south end slope. This optimization leads to a steep mining stripping volume of 3.2735 million m³ and a coal output of 2.49628 million tons, maintaining a stripping ratio of 1.31 m³/t. These results demonstrate that unmanned driving road width optimization not only ensures slope safety but also significantly boosts the economic benefits of steep mining in open-pit mines. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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25 pages, 9964 KiB  

Open AccessArticle

Feasibility Study of Material Deformation and Similarity of Spatial Characteristics of Standard Coal Rocks

by Gang Liu, Dongwei Wang, Yonglong Zan, Shengxuan Wang and Qiqi Zhang

Processes 2024, 12(3), 454; https://doi.org/10.3390/pr12030454 - 23 Feb 2024

Cited by 3 | Viewed by 1237

Abstract

The comparison between similar materials and original coal rock is the basis for similar simulation experiments in coal mines. The differences in mechanical properties, acoustic characteristics, and damage laws between similar materials and the original coal rock are of great significance for similar [...] Read more.

The comparison between similar materials and original coal rock is the basis for similar simulation experiments in coal mines. The differences in mechanical properties, acoustic characteristics, and damage laws between similar materials and the original coal rock are of great significance for similar simulation research, to reveal objective laws. First, materials similar to coal rock with similar theoretical ratios were taken as the object of research, and the sand–cement ratio, the carbon paste ratio, and the water content were determined by multivariate linear regression to accurately match the ratios. Second, by using acoustic emission and digital scattering technology to explore the acoustic law, deformation characteristics, and spatial feature similarities of the materials similar to coal rock, the acoustic emission evolution law of the original rock was found to be the same as that of the similar materials. Digital scattering was able to describe the localization of strain in the similar materials, and the correlation between the overall deformation and the local deformation was explored. This indicates that materials similar to coal rock can effectively simulate the deformation of actual coal rocks. Lastly, these materials were found to allow effectively simulating the deformation characteristics and spatial properties of actual coal rock, which provides an important experimental means and method for similar research in the field of coal rock engineering. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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20 pages, 14650 KiB  

Open AccessArticle

Fractal Evolution Characteristics of Isolation Layers in a Submarine Gold Mine: A Case Study

by Yin Chen, Zijun Li, Weixing Lin, Yan He, Guoqiang Wang, Renze Ou and Qi Liu

Minerals 2024, 14(2), 205; https://doi.org/10.3390/min14020205 - 17 Feb 2024

Viewed by 1179

Abstract

The establishment of an isolation layer in submarine mining has been a persistent challenge. In the context of this research, we conducted a similarity simulation test to preliminarily assess the interaction between the thickness and extent of the isolation layer. Subsequently, we introduce [...] Read more.

The establishment of an isolation layer in submarine mining has been a persistent challenge. In the context of this research, we conducted a similarity simulation test to preliminarily assess the interaction between the thickness and extent of the isolation layer. Subsequently, we introduce an innovative approach that integrates fractal theory and the Bonded Block Model (BBM) to simulate undersea isolation layer mining. The validation of this method relies on on-site borehole scanning and displacement monitoring, which depict the intricate fractal evolution of fractures and predict the optimal thickness of the isolation layer. Our findings affirm the robustness and validity of this method. Evaluation of the fractal dimensions of fractures reveals that a critical threshold of 1.7 is essential to prevent structural failure of the isolation layer, while a limit of 1.5 is necessary to avoid significant water ingress. Remarkably, the correlation dimension of the settlement time series closely aligns with the fractal dimension of the fractures, underscoring the feasibility of ensuring the safety of isolation layer mining through real-time settlement monitoring. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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16 pages, 5365 KiB  

Open AccessArticle

Dimensionless Analysis of the Spatial–Temporal Coupling Characteristics of the Surrounding Rock Temperature Field in High Geothermal Roadway Realized by Gauss–Newton Iteration Method

by Jiale Zhou, Yuan Zhang, Peng Shi and Yang Liu

Appl. Sci. 2024, 14(4), 1608; https://doi.org/10.3390/app14041608 - 17 Feb 2024

Viewed by 979

Abstract

Understanding the time–space coupling characteristics of the surrounding rock temperature field in high geothermal roadways is essential for controlling heat damage in mines. However, current research primarily focuses on individually analyzing the temperature changes in the surrounding rock of roadways, either over time [...] Read more.

Understanding the time–space coupling characteristics of the surrounding rock temperature field in high geothermal roadways is essential for controlling heat damage in mines. However, current research primarily focuses on individually analyzing the temperature changes in the surrounding rock of roadways, either over time or space. Therefore, the Gauss–Newton iteration method is employed to model the coupling relationship between temperature, time, and space. The results demonstrate that the dual coupling function describing the temperature field of the surrounding rock in both time and space provides a more comprehensive characterization of the temperature variations. Over time, as ventilation duration increases, the fitting degree of the characteristic curve steadily rises, and the characteristic curve descends overall. In the spatial dimension, the fitting degree of the characteristic curve gradually decreases with the rise of the dimensionless radius, and the characteristic curve ascends overall. Additionally, as thermal conductivity increases, the fitting degree of the characteristic curve steadily rises. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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18 pages, 4776 KiB  

Open AccessArticle

Simulation Study on Dynamic Characteristics of the Chain Drive System for Mining Scraper Conveyor Driven by the Permanent Magnet Synchronous Motor

by Xi Zhang, Mingming Ren, Hongju Wang and Lei Jin

Processes 2024, 12(1), 165; https://doi.org/10.3390/pr12010165 - 10 Jan 2024

Cited by 5 | Viewed by 2212

Abstract

The chain drive system represents a critical subsystem within the scraper conveyor. This paper proposes a joint simulation model for the drive system of the scraper conveyor, driven by the permanent magnet synchronous motor, in order to conduct a comprehensive analysis of the [...] Read more.

The chain drive system represents a critical subsystem within the scraper conveyor. This paper proposes a joint simulation model for the drive system of the scraper conveyor, driven by the permanent magnet synchronous motor, in order to conduct a comprehensive analysis of the dynamic characteristics of the chain drive system during the operational process. Firstly, the dynamic simulation model for the mining scraper conveyor’s chain drive system was established in ADAMS, taking into account its structural characteristics. Then, the mathematical model of the permanent magnet synchronous motor was established using the coordinate transformation theory, and the speed controller based on vector control was designed by using the theory related to sliding mode control. The coupling relationship between the chain drive system of the scraper conveyor and the permanent magnet synchronous motor drive system was investigated. Finally, a joint simulation model of the mechanical system and motor control system was created using ADAMS (View 2019) and MATLAB/Simulink (2020a). The dynamic characteristics of the chain drive system were analyzed, and the three typical working conditions of no load, half load, and rated load were considered. The results show that the contact force between the flat ring and the sprocket undergoes an initial increase, followed by a decrease, and finally another increase. As the load increases from no load to full load, there is a marked increase in the contact force between the loaded side chainrings. Due to the polygon effect, both the speed curve of the permanent magnet drive motor and the contact force curve between the ring chains exhibit periodic fluctuations. The research in this paper provides an idea for the coupling analysis of the scraper conveyor electromechanical system. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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14 pages, 1962 KiB  

Open AccessArticle

Energy Accumulation Law of Different Forms of Coal–Rock Combinations

by Zibo Li, Guohua Zhang, Yubo Li, Wenjun Zhou, Tao Qin, Li Zeng and Gang Liu

Appl. Sci. 2023, 13(20), 11393; https://doi.org/10.3390/app132011393 - 17 Oct 2023

Cited by 1 | Viewed by 1249

Abstract

Coal–rock disasters are becoming more and more severe as the intensity of coal mining increases. Due to its destructive power and resulting extensive area damage, rock burst is among the most critical threats to coal mine safety. It results from the combined action [...] Read more.

Coal–rock disasters are becoming more and more severe as the intensity of coal mining increases. Due to its destructive power and resulting extensive area damage, rock burst is among the most critical threats to coal mine safety. It results from the combined action of the coal and the rock when affected by the mining process. To this end, we used a combination of coal and rock to conduct our studies. Combining a uniaxial compression experiment with theoretical analysis, this work investigated how different lithologies and coal–rock height ratios affect the mechanical properties of this combination and the law governing energy accumulation. We determined the following: When the coal–rock height ratios are dissimilar, the peak strength and modulus of elasticity of the combination show a negative correlation with the coal thickness share, and the pre-peak energy accumulation and impact energy index of the combination is positively correlated with the coal thickness percentage. In combination with the same coal–rock height ratio, the peak strength, elastic modulus, pre-peak energy accumulation, and impact energy index all increase with increased rock strength and elastic modulus. The presence of a hard rock layer affects the accumulation of pre-peak energy. Based on the experimental analysis, a theoretical model was established, and the surrounding rock stress negatively correlates with the percentage of coal thickness; the energy stored in the surrounding rock is directly proportional to the coal in the zone. Therefore, we inferred that the stress distribution of the surrounding rock as coal thickness changes is abnormal; substantial energy accumulation can swiftly initiate dynamic disasters, such as rock bursts. This study has important reference significance for preventing and controlling rock bursts in areas where coal thickness changes. Full article

(This article belongs to the Topic New Advances in Mining Technology)

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