断层防水煤柱侧工作面“采帮钻孔+断顶卸压”防冲研究  

Study on Rock Burst Control of"Mining Side Borehole and Roof Broken Pressure Relief"in Working Face near Fault Waterproof Coal Pillar

作　　者：肖华建 谢鹏 XIAO Huajian;XIE Peng(Tiandi(Changzhou)Automation Co.,Ltd.,Changzhou 213000,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]天地(常州)自动化股份有限公司,江苏常州213000 [2]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《煤炭技术》2024年第10期71-74,共4页Coal Technology

摘　　要：大直径钻孔卸压是冲击地压煤层常用的卸压手段,但在断层附近施工大直径钻孔可能会出现断层导水或无法施工至设计孔深等问题,而断顶爆破卸压可以作为一种补充卸压措施。以某矿采煤工作面为工程背景,分析了煤柱应力特征,模拟研究了不同方案卸压效果,针对具体工况设计了卸压方案,并进行了现场应用。研究结果表明,受回采影响,靠近工作面采空区一侧的煤柱应力集中程度较高;对比分析了“采帮钻孔+断顶卸压”与“两帮钻孔卸压”效果,发现采用“采帮钻孔+断顶卸压”方案后煤柱应力降低较明显;将该方案进行了现场应用,工作面回采期间煤柱侧未发生应力预警,保证了工作面的安全回采。Large-diameter borehole pressure relief is a commonly used pressure relief method in coal mine.However,the construction of large-diameter boreholes near faults may cause problems such as fault water conduction or inability to construct to the design depth.Roof-breaking blasting pressure relief can be used as a supplementary pressure relief measure.Based on the engineering background of a coal mine,the stress characteristics of the coal pillar was analyzed,and the pressure relief effect of different pressure relief schemes was studied.Then,the field test was carried out in working face.The results show that the stress concentration of the coal pillar near the goaf side of the working face is higher due to the influence of mining.It was considered that the stress of coal pillar was obviously reduced after adopting the scheme of"mining side borehole and roof broken pressure relief".The field test indicated that no warning occurred on the side of the coal pillar during the mining of the working face,which ensured the safe mining.

关 键 词：断层 煤柱 断顶卸压 大直径钻孔卸压 

分 类 号：TD324[矿业工程—矿井建设]