煤矿安全2019，Vol.50Issue(6)：158-161,4.DOI:10.13347/j.cnki.mkaq.2019.06.040
多煤层开采覆岩破坏规律数值模拟及工程实践
Numerical Simulation and Engineering Practice of Overburden Failure Law in Multiple Seams Mining
ZHENG Xunzhen 1WANG Yan 2ZHAO Haibo 3CHENG Zhixiang2
作者信息
- 1. School of Civil Engineering, Changchun University of Architecture & Civil Engineering, Changchun 130607, China
- 2. China Coal Technology and Engineering Group Shenyang Research Institute, Fushun 113122, China
- 3. State Key Laboratory of Coal Mine Safety Technology, Fushun 113122, China
- 折叠
摘要
Abstract
To analyze the failure law of overburden strata in multiple seams mining, the 8601 working face of Ansheng Coal Mine and the 8501 working face of 5# coal were taken as the engineering background. The theoretical method was used to calculate the height of the fracturing water in the single coal seam of 8501 working face, and FLAC3D software was used to simulate overburden failure laws and water-conducting development characteristics of multiple seams mining. The result shows that the theoretical height of the water-conducted zone is 65.35 meters, accounting for 84.87% of the layer spacing; under multiple seams mining conditions, the distance from 8501 working face is 200 meters. The low stress region is generated, and the vertical stress peak is about 6.2 MPa, which is 32.6% lower than that of single mining. This area has a large area of plastic damage, with a layer spacing of 77 meters. Overburden rock produces long enough channel to cause water damage. Engineering practice shows that 8501 working surface has been safely completed without water damage after the drainage of the old empty area.关键词
多煤层开采/覆岩/破坏规律/数值模拟/导水断裂带Key words
multiple seam mining/overburden/failure law/numerical simulation/water conducted zone分类
矿业与冶金引用本文复制引用
ZHENG Xunzhen,WANG Yan,ZHAO Haibo,CHENG Zhixiang..多煤层开采覆岩破坏规律数值模拟及工程实践[J].煤矿安全,2019,50(6):158-161,4.
