中南大学学报（自然科学版）2026，Vol.57Issue(7)：3225-3240,16.DOI:10.11817/j.issn.1672-7207.2026.07.027
中小尺度断层群构造区煤层开采微震活动规律及卸压调控方法
Microseismic activity law and pressure relief control method of coal mining in the area of medium and small-scale fault group
摘要
Abstract
To study the problem of prevention and control of rock burst under the influence of medium and small-scale fault group,taking the coal mining in the area of medium and small-scale fault group in the No.9 mining area of Jining No.2 Coal Mine as the engineering background,a three-dimensional numerical model was established to analyze the stress distribution characteristics of medium and small-scale fault group.Based on field microseismic monitoring data,the microseismic activity law of medium and small-scale fault group was studied,the prevention and control method of rock burst in the area of medium and small-scale fault group was discussed,and the engineering practice was carried out in the 93low11-2 working face.The results show that the area of medium and small-scale fault group in Jining No.2 Coal Mine is mainly normal faults,the influencing range of the stress disturbance increases with the increase of fault drop,and the influencing range of the hanging wall is greater than that of the foot wall.The microseismic activity in the area of medium and small-scale fault group is dominated by low-energy events,when the working face is nearby to or passes through the fault,the microseismic distribution shows aggregation characteristics in space.The mining processes of the 93low06,93low09 and 93up15 working face are also dominated by low-energy events,the microseismic b value decreases as the working face approaches the fault group,and the rapid increase of cumulative energy of the single-day microseismic mostly occurs in the decrease stage of the b value.Medium and small-scale faults only exhibit microseismic activities when they are adjacent to or intersect with the working face.The working face should avoid being located in the area where tectonic stress is superimposed.Protective layer mining can effectively reduce the stress concentration in the area of fault group,and reasonable pressure relief measures(i.e.roof blasting,large-diameter drilling)can achieve the safe coal mining in the area of medium and small-scale fault group.In the 93low11-2 working face,after taking protective layer mining and local pressure relief measures,the microseismic activity is obviously weakened during the stopping process,which avoids the large high-energy microseismic events caused by the roof fracture.关键词
冲击地压/中小尺度/断层群/微震活动/卸压调控Key words
rock burst/medium and small-scale/fault group/microseismic activity/pressure relief control分类
矿业与冶金引用本文复制引用
郭伟耀,吴治兴,尹立明,谭云亮,赵同彬,蒋宇静,程传超,高飞..中小尺度断层群构造区煤层开采微震活动规律及卸压调控方法[J].中南大学学报（自然科学版）,2026,57(7):3225-3240,16.基金项目
国家自然科学基金资助项目(52274086) （52274086）
山东省高等学校青创科技支持计划项目(2024KJH069) （2024KJH069）
山东省泰山学者项目(tstp20221126)(Project(52274086)supported by the National Natural Science Foundation of China （tstp20221126）
Project(2024KJH069)supported by the Shandong Provincial Youth Innovation and Technology Support Program （2024KJH069）
Project(tstp20221126)supported by the Project of Taishan Scholar in Shandong Province) （tstp20221126）
