Next Article in Journal
Application and Evaluation of the China Meteorological Assimilation Driving Datasets for the SWAT Model (CMADS) in Poorly Gauged Regions in Western China
Previous Article in Journal
Modelling Methane and Nitrous Oxide Emissions from Rice Paddy Wetlands in India Using Artificial Neural Networks (ANNs)
Open AccessArticle

An Index of Aquiclude Destabilization for Mining-Induced Roof Water Inrush Forecasting: A Case Study

1
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China
2
School of Mines, China University of Mining & Technology, Xuzhou 221116, China
3
School of Mining Engineering, University of New South Wales, Sydney 2052, Australia
*
Author to whom correspondence should be addressed.
Water 2019, 11(10), 2170; https://doi.org/10.3390/w11102170
Received: 6 September 2019 / Revised: 14 October 2019 / Accepted: 16 October 2019 / Published: 18 October 2019
(This article belongs to the Section Water Resources Management and Governance)
Aquiclude plays a critical role in the occurrence of mining-induced roof water inrush in underground coal mines. This paper proposes an assessment index for the evaluation of aquiclude stability and a threshold value of water inrush from the roof, based on a case study of roof water inrush accidents in Cuimu coal mine, China. The relation between roof water inrush and water level variation in the aquifer, and the characteristics of aquiclude deformation, were studied in this assessment. Using the developed assessment criteria, the likelihood of roof water inrush was categorized into different risk levels, which were followed by a proposal for roof water inrush control measures. The main findings of this study are: a) in Cuimu coal mine, the waterbody in the bed separation between the upper aquifer and the aquiclude directly causes the inrush, and inrush occurs after the water level declines in the aquifer; b) tension-induced horizontal strains of aquiclude can be regarded as the index to evaluate the stability of aquiclude affected by underground coal mining—roof water inrush occurs when the maximum horizontal strain reaches a threshold of 10mm/m—c) based on the critical mining height for aquiclude instability, and the different thicknesses of barrier layers, high-risk zones are identified and inrush controls are proposed. View Full-Text
Keywords: aquiclude stability; roof water inrush; threshold value; horizontal strain; critical mining height aquiclude stability; roof water inrush; threshold value; horizontal strain; critical mining height
Show Figures

Figure 1

MDPI and ACS Style

Fan, G.; Zhang, S.; Zhang, D.; Zhang, C.; Chen, M.; Li, Q. An Index of Aquiclude Destabilization for Mining-Induced Roof Water Inrush Forecasting: A Case Study. Water 2019, 11, 2170.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop