Coal pillar’s breaking and fracture development mechanism and numerical simulation-Reference-Cited by-同舟云学术

Coal pillar’s breaking and fracture development mechanism and numerical simulation

Published:2022 Issue:3 Part B Volume:26 Page:2439-2446
ISSN:0354-9836
Container-title:Thermal Science
language:en
Short-container-title:THERM SCI

Author:

Teng Fei¹,Yu Minggao²,Chao Jiangkun¹,Ma Zhihui¹

Affiliation:

1. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, China

2. a School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, China + State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China

Abstract

This study explores the influence of a repeated mining process on an upper coal pillar in a close coal seam group. The pillar's breaking and instability processes are emphasized, and the influence of fracture development on the oxidation and spontaneous combustion of coal pillars is revealed. A numerical simulation is used to simulate the dynamic evolution characteristics of stress, displacement of the upper coal pillar, and the numerical results elucidate that the mining of the lower adjacent coal seam is a pressure relief process for the upper coal pillar. The theoretical length of the fracture along the strike of the upper coal pillar is also obtained for the upper coal pillar.

Publisher

National Library of Serbia

Subject

Renewable Energy, Sustainability and the Environment

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