基于能量准则的大采高综采面煤壁片帮机理分析  

Coal-wall Sliding Mechanism of Large-mining-height Full-mechanized Mining Face Based on Energy Criterion

作　　者：祝凌甫[1] 

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《煤矿开采》2014年第4期9-12,共4页Coal Mining Technology

基　　金：国家自然科学基金项目(51304115);国家"十二五"科技支撑计划(2012BAK04B08)

摘　　要：大采高工作面煤壁片帮冒顶严重影响工作面的产能和效能,通过分析大采高开采煤壁破坏典型的受拉破坏特征,得出了大面积片帮的板状失稳机理;采用线弹性能准则、脆性准则以及RQD指标来对大采高开采时煤壁的稳定性进行了评价;还探讨了割煤高度与煤壁片帮的关系,得出了特定煤层赋存条件下开采的临界稳定高度计算依据,提出了预防煤壁片帮的技术措施。Coal-wall slide and roof fall seriously influence output and efficiency of mining face .By analyzing tension failure characteris-tic of coal-wall in large-mining-height mining, tabular instability mechanism of large-sized coal-wall slide was obtained.Applying linear-elastic energy principle , crisp principle and RQD index to evaluating coal-wall stability in large-mining-height mining , discussing the relationship of mining coal height and coal-wall slide , critical stability height calculation basis was obtained for specific coal -seam oc-currence condition and technical measure of preventing coal-wall slide was put forward .

关 键 词：能量准则 大采高综采 煤壁片帮 片帮机理 

分 类 号：TD325[矿业工程—矿井建设]