中深度煤层采动影响下围岩应力运移规律  

On the Stress Transport Law of Surrounding Rock Under the Influence of Mining in Mid-depth Coal Seam

作　　者：吕栋男 李峰[1] LYU Dongnan;LI Feng(School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Jizhong Energy Resources Co.,Ltd.,Xingtai 054000,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083 [2]冀中能源股份有限公司,河北邢台054000

出　　处：《湖南科技大学学报(自然科学版)》2024年第4期19-27,共9页Journal of Hunan University of Science And Technology:Natural Science Edition

摘　　要：通过对中深度煤层采动影响下的上覆岩层裂隙发育规律的研究,指导矿井顶板和瓦斯防治方案的制定.以大淑村矿174302工作面为工程背景,在工作面不同推进距离的条件下,采用FLAC3D模拟工作面倾向应力和走向应力的变化,对采动后煤体的支撑应力变化规律和采动影响的顶板应力、顶板位移变化规律进行分析,得出中深度煤层采动影响下围岩的应力运移规律,结果表明:工作面倾向应力、走向应力和底板应力均在100 m后趋于稳定,回采后上覆岩层7~13 m内岩层的离层裂隙发育较大,距顶板高度10~12 m时的下沉量最大.研究结果可为大淑村矿顶板和瓦斯防治提供科学依据.To guide the development of gas extraction plans,the development law of overlying rock fractures under the influence of mining is studied.Taking the 174302 working face of Dashucun Mine as the specific engineering background,FLAC~(3D)numerical simulation is used to analyze the variation law of inclined stress and vertical stress of the working face at different advancing distances.The variation law of supporting stress of the coal body after mining and the variation law of roof stress and displacement under the influence of mining are analyzed.The stress migration law of the surrounding rock under the influence of mining in medium depth coal seams is obtained.Results show that the inclined stress,strike stress,and floor stress of the working face tend to stabilize after 100 m.After mining,the development of rock separation fractures in the overlying rock layer within the range of 7~13 m is relatively large.The maximum subsidence occurs at a height of 10~12 m from the top plate.The research results can provide scientific basis for the roof and gas prevention and control of Dashucun Mine.

关 键 词：采动影响 应力分布 裂隙演化 顶板位移 卸压时机 

分 类 号：X936[环境科学与工程—安全科学]