摘要
为了解决磁窑沟煤矿近距离下煤层巷道外错式布置,掘进初期存在的矿压显现问题,对外错式巷道围岩失稳机理及特征进行研究,基于巷道失稳机理及巷道维护理论,通过计算法优化支护方案,采用FLAC^(3D)数值模拟技术,对优化支护方案强度校核,对现场巷道支护优化效果进行分析。研究结果表明:上覆煤柱应力集中是近距离煤层下煤层外错式巷道稳定性主要原因,巷道采取优化支护方案后,能够有效解决巷道失稳问题,避免了安全隐患,提高了掘进速率。
In order to solve the misalignment of the coal seam roadway under the close distance of the Ciyaogou Coal Mine,the mine pressure appears in the early stage of the excavation,and the instability mechanism and characteristics of the surrounding rock in the external-misaligned roadway are studied.Based on the instability mechanism of the roadway and the roadway maintenance theory,through the calculation method to optimize the support scheme,the FLAC3D numerical simulation technology is used to optimize the strength of the support scheme and analyze the optimization effect of the onsite roadway support.The results show that the stress concentration of the overlying coal pillar is the main reason for the stability of the faulty roadway under the coal seam.The optimized support scheme can effectively solve the problem of roadway instability,avoiding safety hazards and improving the tunneling rate.
作者
雷焱云
LEI Yan-yun(Shanxi Jinshen Energy Co.,Ltd.,Hequ 036500,China)
出处
《煤炭工程》
北大核心
2018年第A01期42-46,共5页
Coal Engineering
关键词
外错式
稳定性分析
FLAC3D
支护优化
external-misaligned
stability analysis
FLAC3D
support optimization
