关键层极限跨距预测矿井冲击地压发生时间的研究  

Practical Study on the Prediction of the Time of Mine Impact Ground Pressure by the Limit Span of Key Strata

作　　者：李永超 于国强 李建军 Li Yong-chao1 ,Yu Guo-qiang2 , Li Jian-jun1(1. Shandong Province Daizhuang Coal Mine, Shandong Weishan 277600;2. Shandong Province TengDong Coal Mine, Shandong Tengzhou 27752)

机构地区：[1]山东省岱庄生建煤矿,山东微山277600 [2]山东省滕东生建煤矿,山东滕州277522

出　　处：《山东煤炭科技》2018年第6期161-162,165,168,共4页Shandong Coal Science and Technology

摘　　要：根据山东省滕东生建煤矿地表移动变形观测站的数据分析,发现在煤层上覆岩层中可能存在关键层,采用关键层理论对煤层上覆岩层进行了关键层的判断,计算得出了关键层的极限跨距。对矿井面临的冲击地压类型进行了分析,得出了该矿关键层垮落产生的能量动载与静载叠加足以诱发强冲击的结论,并依据关键层的极限跨距预测了工作面推进过程中厚硬岩层结构突变及煤柱失稳的大概时间,指导了该矿冲击地压的防治工作。Based on the observation data analysis of surface movement deformation of Shandong Province Teng Dong Coal Mine, we found there may be a key stratum in the overburden of the coal seam. The key stratum theory is used to judge the key strata of coal seam overlying strata, and the critical span of critical stratum is calculated. The impacts on the mine face pressure type are analyzed, and it is concluded that the key strata caving mine energy superposition of dynamic load and static load was enough to induce strong impact, and on the basis of the limit span of key stratum, the probable time of instability of coal pillar and the structural mutation of rock strata thickness in the process of working face advancing, is predicted pillar, guiding the prevention and treatment of rock bursts.

关 键 词：复合关键层 极限跨距 冲击地压 巨厚砾岩 地表移动变形 

分 类 号：TD324[矿业工程—矿井建设]