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OA
Microseismic activity law and pressure relief control method of coal mining in the area of medium and small-scale fault group
为研究中小尺度断层群影响下冲击地压防控问题,以济宁二号煤矿九采区中小尺度断层群构造区煤层开采为工程背景,建立三维数值模型,分析中小尺度断层群构造区应力分布特征,基于现场微震监测数据研究中小尺度断层群构造区微震活动规律,探讨中小尺度断层群构造区冲击地压防控方法,并对地质条件更为复杂的93下11-2工作面开展了工程实践.研究结果表明:济宁二号煤矿中小尺度断层群以正断层为主,断层上、下盘应力扰动区影响范围随断层落差增大而增加,且上盘影响范围大于下盘影响范围;中小尺度断层群构造区微震活动以低能量事件为主,当微震分布在工作面邻近或过断层时表现出空间聚集特征;93下06、93下09及93上15工作面在回采过程中也以低能量微震事件为主,微震b值随工作面接近断层群而减小,而单日微震累计能量的急剧升高多发生于b值下降阶段;中小尺度断层仅在工作面邻近或与之相交时产生微震活动,工作面应避免布置在构造应力叠加区域;保护层开采能有效减小断层群构造区应力集中,结合顶板爆破、大直径钻孔卸压等措施,能够实现中小尺度断层群构造区的煤层安全开采;93下11-2工作面在采取保护层开采及局部卸压措施下,在回采过程中,微震活动明显减弱,有效避免了顶板破断过程中诱发大的高能量微震事件.
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.
郭伟耀;吴治兴;尹立明;谭云亮;赵同彬;蒋宇静;程传超;高飞
山东科技大学能源与矿业工程学院,山东 青岛,266590||山东科技大学山东省深部矿井动力灾害智能防控重点实验室,山东 青岛,266590山东科技大学能源与矿业工程学院,山东 青岛,266590山东科技大学能源与矿业工程学院,山东 青岛,266590山东科技大学能源与矿业工程学院,山东 青岛,266590||山东科技大学山东省深部矿井动力灾害智能防控重点实验室,山东 青岛,266590山东科技大学能源与矿业工程学院,山东 青岛,266590||山东科技大学山东省深部矿井动力灾害智能防控重点实验室,山东 青岛,266590长崎大学工学研究科,日本长崎,852‒8521兖矿能源集团股份有限公司济宁二号煤矿,山东 济宁,370800山东三越仪器有限公司山东省院士工作站,山东 德州,251200
矿业与冶金
冲击地压中小尺度断层群微震活动卸压调控
rock burstmedium and small-scalefault groupmicroseismic activitypressure relief control
《中南大学学报（自然科学版）》 2026 (7)
3225-3240,16
国家自然科学基金资助项目(52274086)山东省高等学校青创科技支持计划项目(2024KJH069)山东省泰山学者项目(tstp20221126)(Project(52274086)supported by the National Natural Science Foundation of ChinaProject(2024KJH069)supported by the Shandong Provincial Youth Innovation and Technology Support ProgramProject(tstp20221126)supported by the Project of Taishan Scholar in Shandong Province)
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