留顶煤厚度对大采高综采工作面端面稳定性的影响  

Influence of Top Coal Thickness on End-face Stability of Fully Mechanized Mining Face with Large Mining Height

作　　者：张守宝[1] 王志留 薛善彬 张瑜鹏[1] 杨广通 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤矿安全》2015年第3期197-200,共4页Safety in Coal Mines

基　　金：国家自然科学基金重点资助项目(51234005);教育部博士点新教师资助项目(20110023120002);中央高校基本科研业务费专项资金资助项目(2009QZ10)

摘　　要：针对大采高开采实践中由于煤体强度低和采动节理裂隙发育,在留顶煤条件下端面顶板和煤壁的稳定性大幅降低易于出现冒顶片帮的现象,分析了出现端面冒顶和片帮事故的原因,并运用UDEC数值模拟技术,模拟大采高综采采煤过程中,不同的割煤高度对综放工作面端面的应力和变形的影响,得出端面围岩状况最佳的采煤高度。通过理论分析和现场实践观测表明,在煤厚为6.0 m的条件下,割煤高度为5.5 m时围岩破坏最严重。For the phenomenon of roof falling and rib spalling under the condition that the stability of end- face roof and rib is significantly reduced in top coal because of low intensity and coal mining fractured joints in large mining height mining practice,we analyzed the reasons for the end- face roof falling accident and spalling,and simulate the influence of different coal cutting height on stress and deformation of end- face in fully mechanized caving face in mining process by UDEC numerical simulation technology,and found the best mining height. Theoretical analysis and field practice observation shows that the height of most severely damaged is 5. 5 m under the condition of 6. 0 m thick coal.

关 键 词：大采高 顶煤厚度 数值模拟 稳定性 裂隙发育 

分 类 号：TD323[矿业工程—矿井建设]