深部岩巷非对称性变形原因与补强支护技术  

Asymmetric Deformation Mechanism and Control Technology in Deep Roadway

作　　者：辛光明 袁奇[2] 郑永胜[3] 邢文彬 赵南南 XIN Guangming;YUAN Qi;ZHENG Yongsheng;XING Wenbin;ZHAO Nannan(Yangcheng Coal and Electricity Company,Shandong Jining Mining Luneng Coal and Electricity Co.,Ltd.,Jining 272502,China;State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and,the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 266590,China;Zhai Town Coal Mine,Shandong Taishan Energy Co.,Ltd.,Xintai 271204,China)

机构地区：[1]山东济矿鲁能煤电股份有限公司阳城煤电,山东济宁272502 [2]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [3]山东泰山能源有限责任公司翟镇煤矿,山东新泰271204

出　　处：《煤矿安全》2020年第3期207-210,215,共5页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(51774195);山东省重点研发计划资助项目(2018GSF117023)。

摘　　要：针对深部岩巷掘进支护后表现出的非对称变形破坏的现象,采用力学理论分析结合计算机数值模拟的方法对其变形破坏的原因及支护控制进行研究分析。结果表明,巷道周边围岩一侧肩角及对应的底角出现不同程度的应力集中,且这些应力集中点围岩发生塑性变形,是产生非对称变形破坏的关键部位;周边工作面回采后,侧向支承应力拱垂直于覆岩形成应力扰动,造成巷道非对称受力,与模拟结果相同。基于上述研究,提出了"关键变形部位补偿加强支护"的控制对策。工程应用结果表明,采用非对称加强支护形式,可以有效控制巷道非对称变形,巷道围岩稳定性大大提高。In view of the phenomenon of asymmetric deformation and failure after deep rock roadway excavation and support,the causes of deformation and failure and support control were analyzed by means of mechanical theory analysis and computer numerical simulation.The results show that the stress concentration at the shoulder angle and the corresponding bottom angle of the surrounding rock is different,and the plastic deformation occurs in the surrounding rock at these stress concentration points,which is the key part of the asymmetric deformation and failure.After the stoping of the surrounding working face,the lateral support stress arch perpendicular to the overburden rock forms stress disturbance,resulting in the asymmetric stress of the roadway,which is the same as the simulation results.Based on the above research,the control strategy of"compensation and reinforcement support for key deformation parts"is proposed.The results of engineering application show that the asymmetric reinforcement support can effectively control the asymmetric deformation of roadway and greatly improve the stability of roadway surrounding rock.

关 键 词：非对称变形 岩巷 关键变形 补偿加强 巷道支护 

分 类 号：TD353[矿业工程—矿井建设]