| Issue |
E3S Web of Conf.
Volume 406, 2023
2023 9th International Conference on Energy Materials and Environment Engineering (ICEMEE 2023)
|
|
|---|---|---|
| Article Number | 02006 | |
| Number of page(s) | 6 | |
| Section | Energy Conservation Technology and Energy Sustainability | |
| DOI | https://doi.org/10.1051/e3sconf/202340602006 | |
| Published online | 31 July 2023 | |
Research on structural evolution characteristics of overburden rock for shallow buried thick coal seam mining
Henan Polytechnic University School of Energy Science and Engineering,Jiaozuo 454000
In order to grasp the structural evolution characteristics of overburden rock in shallow buried thick coal seam mining, the mechanism of overburden rock destabilization in the mining of 42106 comprehensive release workings in the 4-2 coal seam of Bultai coal mine was analyzed by using theoretical analysis, similar simulation and numerical simulation. The results show that: with the increase of the workface recovery length, the overburden of the comprehensive release workface experiences a continuous dynamic sinking process; the initial pressure step is about 95m, and the initial breakage position of the key layer is located at the back of the workface, and the periodic pressure step is about 25m, and the breakage position is located in front of the coal wall; when the workface recovery distance is from 65m to 95m, the overburden support stress of the comprehensive release workface appears to rise abruptly at the initial pressure. trend.
© The Authors, published by EDP Sciences, 2023
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