条带工作面采动应力分布规律及分级承载卸压研究  

Study on mining stress distribution law and graded bearing pressure relief of strip working face

作　　者：王经论 成云海[1,3] 孙鹏宫 高阳 Wang Jinglun;Cheng Yunhai;Sun Penggong;Gao Yang(School of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China;Liangbaosi Energy Co.,L.,Jining 272404,China;Mining Engineering Research Institute Shandong University of Science and Technology,Tai’an 271200,China)

机构地区：[1]安徽理工大学矿业工程学院,安徽淮南232001 [2]梁宝寺能源有限责任公司,山东济宁272404 [3]山东科技大学采矿工程研究院,山东泰安271200

出　　处：《煤炭与化工》2024年第11期9-15,共7页Coal and Chemical Industry

摘　　要：为实现冲击地压矿井安全有序生产,开展采动应力分布规律的研究。以梁宝寺煤矿3314条带工作面为工程背景,采用数值模拟,分析3314工作面不同回采距离时上覆岩层沿倾向的位移场及应力场分布云图;采用应力监测,分析条带煤柱面覆岩空间结构演化过程中的垂直应力和覆岩垂直位移之间的相关关系。研究结果表明:条带煤柱面动态应力集中程度与覆岩空间岩层运动高度呈正相关关系,覆岩空间岩层运动高度低,动态应力集中程度低,反之,则大,当覆岩空间岩层运动高度稳定后,动态应力峰值也达到了最大值。针对工作面剩余条带煤柱的回收过程中,两侧已采工作面的侧向支承压力向条带煤柱转移,其应力水平达到或超过发生冲击地压的应力条件,冲击危险性较高等问题,提出“双层钻孔”技术,形成“分级承载”和“分次转移”的卸压模式。In order to realize the safe and orderly production of rock burst mine,the research on the distribution law of mining stress was carried out.No.3314 strip working face of Liangbaosi Mine was taken as the engineering background,the numerical simulation was used to analyze the displacement field and stress field distribution cloud diagram of the overlying strata along the tendency at different mining distances of No.3314 working face.Stress monitoring was used to analyze the correlation between vertical stress and vertical displacement of overlying strata during the evolution of spatial structure of strip coal pillar.The results showed that there was a positive correlation between the dynamic stress concentration degree of the strip coal column and the movement height of the overlying rock space.The lower the movement height of the overlying rock space,the lower the dynamic stress concentration degreed,and vice versa.When the movement height of the overlying rock space was stable,the dynamic stress peak also reached the maximum value.In the process of recovering the remaining strip coal pillar in the working face,the lateral abutment pressure of the working face on both sides was transferred to the strip coal pillar,and the stress level reaches or exceeded the stress condition of rock burst,and the risk of rock burst was high.The'double-layer drilling'technology was proposed to form the pressure relief mode of'graded bearing'and'fractional transfer'.

关 键 词：采动应力 条带煤柱 钻孔卸压 应力转移 覆岩结构 

分 类 号：TD823.86[矿业工程—煤矿开采]