煤体强度及倾角对大采高煤壁稳定性的影响研究  

Study on Effects of Dip Angle and Hardness of Coal Seam on Rib Stability with Great Mining Height

作　　者：刘刚 潘凡[2] 张文锡[2] 魏燕龙 王腾[2] 孟超[2] 

机构地区：[1]中煤平朔集团,山西朔州036006 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭技术》2016年第1期36-38,共3页Coal Technology

摘　　要：运用弹性力学理论分析了大采高工作面煤壁失稳机理,建立了大采高工作面的失稳判别准则。应用PFC模拟了不同煤体强度条件下煤层倾角对大采高煤壁稳定性的影响,发现工作面俯仰角对煤壁稳定性的影响随着煤体强度的增加而减弱,但对煤壁失稳形式影响较小。This research analyzed the mechanism behind such a phenomenon using elastic mechanics, with an instability criterion for predicting rib spalling established. Investigated the effect of coal seam hardness and its dip angle on rib stability with PFC, finding that the latter effect mitigates with increasing coal hardness. Finally, coal seam dip angle hardly influences the rib instability patterns.

关 键 词：大采高 片帮 失稳机理 煤体强度 煤层倾角 

分 类 号：TD823[矿业工程—煤矿开采]