Next Article in Journal
Aggregators’ Optimal Bidding Strategy in Sequential Day-Ahead and Intraday Electricity Spot Markets
Previous Article in Journal
A Novel High Controllable Voltage Gain Push-Pull Topology for Wireless Power Transfer System
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Energies 2017, 10(4), 476; doi:10.3390/en10040476

A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining

1
State Key Laboratory of Coal Resource and Safe Mining, China University of Mining & Technology, Beijing 100083, China
2
100083, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mofazzal Hossain
Received: 20 December 2016 / Revised: 28 March 2017 / Accepted: 29 March 2017 / Published: 1 April 2017
View Full-Text   |   Download PDF [1443 KB, uploaded 18 April 2017]   |  

Abstract

The broken pattern of the overburden strata induced by mining has a non-ignorable effect on overlying strata movement, failure, and safety in mining production. To study the caving pattern of overlying strata and determine the calculation method of fracture pathway parameters due to roof caving induced by coal mining, the trapezoidal broken models were developed to explain and prevent water leakage, and even water inrush, during the mining process. By incorporating the variation of the volume expansion coefficient, a connection among the parameters of the fracture pathways and fracture angles, face width, and mining height could be established, which shows that the larger the degree of the fracture angle is, the smaller the value of the volume expansion coefficient and face width is with a relatively larger mining height. This relationship was also used to determine the eventual evolution configuration of the trapezoidal broken model. The presented approaches may help us to better understand the movement of overburden strata and provide an idea to help settle conflicts related to fracture space calculations induced by coal mining. View Full-Text
Keywords: trapezoid broken model; fracture parameters; longwall mining trapezoid broken model; fracture parameters; longwall mining
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Xu, D.; Peng, S.; Xiang, S.; He, Y. A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining. Energies 2017, 10, 476.

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.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top