义马煤田临近逆冲断层开采冲击地压发生机理  

Coal bump mechanism in Yima coalfield mining near thrust fault

作　　者：吕进国 南存全[3] 张寅[2] 谯永刚 唐治 LYU Jinguo;NAN Cunquan;ZHANG Yin;QIAO Yonggang;TANG Zhi(Research Institute for Technology ＆ Equipment of Coal Mine Safety, Liaoning Technical University, Fuxin, Liaoning 123000, China;School ofMechanicsandEngineering, Liaoning Technical University, Fuxin, Liaoning 123000, China;College of Mining and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China;CCTEG China Coal Technology ＆ Engineering Group, Shenyang, Liaoning 110016, China)

机构地区：[1]辽宁工程技术大学矿山安全技术装备研究院,辽宁阜新123000 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [3]辽宁工程技术大学矿业学院,辽宁阜新123000 [4]煤科集团沈阳研究院有限公司,辽宁沈阳110016

出　　处：《采矿与安全工程学报》2018年第3期567-574,共8页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51504128);中国博士后科学基金项目(2016M600213);煤炭资源与安全开采国家重点实验室开放课题项目(SKLCRSM14KFB10)

摘　　要：以义马煤田为工程背景,分析冲击地压频发区域的地质规律;基于F16逆冲断层构造特征与井下地应力实测情况,建立由水平构造应力为主导的简化力学模型,得到水平构造应力以及由其引起附加垂直应力的分布规律,揭示了断层构造附近的地质动力环境;结合现场监测与数值模拟研究地应力与开采叠加作用下巷道冲击地压发生机制,揭示了F16逆冲断层对采场的影响及义马千秋矿"6·5"与"11·3"冲击事故的主因。结果表明:在强大水平推力作用下,断层倾角由缓变陡处的两盘煤岩层会产生高度应力集中与高应变能;水平构造应力与附加垂直应力受断层面几何形态影响显著,可数倍于其他区域应力值;"6·5"冲击事件主因是构造应力、侧向支承压力与工作面超前支承压力的叠加作用;"11·3"冲击事件主因是强侧向支承压力、强断层支承压力和强构造应力的叠加作用。Based on the engineering practices in Yima coalfield, the geological law is analyzed where coal bump accidents occur frequently. Based on the tectonic feature of F16 thrust fault and the measured data of underground ground stress, a simplified mechanics model is built which is driven by the horizontal tectonic stress. Then the distribution law of horizontal tectonic stress and the additional vertical stress caused by the former stress is obtained. The geological dynamics environment on the area near to the fault tectonics is revealed. Combining with the spot measurements and numerical simulations, the coal bump mechanism of tunnel super positioned by the geostress and the mining-induced stress is investigated. Finally, the influence of F16 thrust fault on stope and the main causes of two bump accidents（named ＂6·5＂ and ＂11·3＂ accidents） are reveled. The study results show that both the high stress and the high strain energy can be generated in the position of coal seam thickening abnormally from steep fault dip angle to gentle fault dip angle. Both the horizontal tectonic stress and the additional vertical stress, which are several times larger than other regions, can be affected remarkably by the fault geometry. The superposition of tectonic stress, lateral abutment pressure and abutment pressure in front of workface is the reason of the ＂6·5＂ bump accident. The superposition of stronger tectonic stress, stronger lateral abutment pressure and stronger abutment pressure of fault is the reason of the ＂11·3＂ bump accident.

关 键 词：冲击地压 逆冲断层 力学模型 构造应力 数值模型 叠加作用 

分 类 号：TD31[矿业工程—矿井建设]