浅埋大采高综采矿压显现规律物理模拟实验研究  

Physical simulation on strata behavior of large mining height fully mechanized face in shallow-buried and thick seam

作　　者：来兴平[1] 单鹏飞[1] 郑建伟[1] 曹建涛[1] 崔峰[1] 王春龙[1] 

机构地区：[1]西安科技大学能源学院、教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《采矿与安全工程学报》2014年第3期418-423,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(10772144);陕西省重点科技创新团队计划项目(2013KCT-16);陕西省重点实验室重点项目(09JS018)

摘　　要：以榆神矿区张家峁煤矿5-2特厚煤层为研究背景,通过岩石力学实验确定围岩物理力学参数,构建物理模拟模型并分析模拟支架力学特征。模拟实验结果表明：浅埋煤层大采高工作面矿压显现显著;借助声发射（AE）及试验模型支架监测系统获取模型开采过程中的围岩变形损伤信号,分析顶板来压过程中的围岩移动及支承压力演化机理：声发射信号丰富,事件数峰值达2578个·min-1;顶板周期来压步距约15.0 m,煤壁前方10.0～13.0 m范围为工作面超前支承压力影响范围且压力峰值位置向采空区方向移动,支架的工作阻力12 000 kN能够满足生产需要。According to conditions of No.5-2 super-thick coal seam in Zhangjiamao coal district of Yushen mining area, the physical and mechanical properties of coal-rock masses were measured by lab mechanics experiments. The physical simulation model was built up, and the mechanical properties of support were simulated.The simulation results indicate that the strata behavior of large mining height fully mechnized face is dramatic.Meanwhile, the deformation and damage of rock masses with the excavation were monitored by the acoustic emission （AE） and support pressure monitoring, and the strata movement and evolution of abutment pressure during roof weighting were analyzed.The results also show that the wave variation from AE is remarkable with abutment pressure change, and the max-imum events are reached to 2578 per min.The step of periodical weighing is about 15.0 meters, the advanced abutment pressure zones range from 10.0 to 13.0 meters ahead of the workingface, and the peak pressure moves toward the direction of mined-out area.Moreover, the support with the rated working resistance of 12 000 kN can satisfy the efficient and safe excavation of the coal seam.

关 键 词：浅埋煤层 大采高综采 物理模拟实验 声发射 模型支架监测系统 

分 类 号：TD32[矿业工程—矿井建设]