长壁工作面老顶初次来压的弯曲失稳解析  

ANALYSIS ON BENDING FAILURE OF INITIAL WEIGHTING OF MAIN ROOF IN LONGWALL FACE

作　　者：黄醒春[1] 

机构地区：[1]上海交通大学

出　　处：《煤炭学报》1998年第1期27-32,共6页Journal of China Coal Society

摘　　要：根据煤矿长壁采煤工作面顶板的物理力学特性建立力学解析模型，按卡氏能量法建立求解方程，并采用挠度增量逐次解析法拟合采煤工作面裂隙顶板弯曲失稳的动态过程．结果表明：当岩体强度及支承面摩擦力足够时，顶板受载变形过程中，由于沿层方向（梁轴向）受动荷载的挤压作用，以压力拱的形式维持不同变形阶段的动态平衡．当挠度超过某一极限状态时，顶板产生失稳破坏．Based on mechanical property of roof of longwall face, the mechanics analysis model is built up, equation is built according to castiglianos principle and deflection increment sequential analysis method to fit the dynamic procedure of bending failure of fracture roof in coal face. The results indicate that when there are sufficient strength of rock mass and friction force of bearing surface, during process of loaded deformation of roof, the dynamic balance in various deformation stages is maintained by the form of pressure arch due to squeezing action by dynamic load along strata direction (beam axle direction). Roof failure is occurred when deflection exceeds a ultimate limit.

关 键 词：长壁工作面 顶板 失稳过程 挠度增量法 顶板压力 

分 类 号：TD322.1[矿业工程—矿井建设] TD327.2