切眼支护解除条件下顶煤初次垮落规律研究  

Study of Rules in Top Coal's First Collapse Under the Condition of Cut-hole Supporting Rescission

作　　者：刘治军[1] 陈荣华[2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《煤》2010年第9期1-3,26,共4页Coal

基　　金：国家"973"计划项目(2007CB209405);国家自然科学基金重点项目(50834004)

摘　　要：在巷道支护作用机理的基础上,论证了切眼支护解除的可行性。并利用非线性离散元软件UDEC模拟了切眼支护解除和不解除两种条件下随工作面推进时顶板的变形规律。计算结果显示,支护解除条件下工作面推进2 m时顶煤已出现垮落,比不解除时的顶煤初次垮落步距缩小5.7 m左右,有效提高了煤炭采出率。On the basis of roadway supporting mechanism,the paper demonstrated the feasibility of cut-hole supporting rescission.In two conditions of cut-hole supporting rescission and not,simulated the roof deformation with the working face advances by using nonlinear discrete element software UDEC.The calculation results show that top coal appear collapse when working face advances two meters in condition of cut-hole supporting rescission,which ahead of collapse to 5.7 meters comparing with not remove condition.The coal recovery ratio was effectively improved.

关 键 词：切眼 支护解除 数值模拟 顶煤初次垮落 

分 类 号：TD324[矿业工程—矿井建设]