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Energies 2017, 10(4), 476;

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

State Key Laboratory of Coal Resource and Safe Mining, China University of Mining & Technology, Beijing 100083, China
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
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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

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

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