放顶煤开采顶煤变形与破碎特征  

The characteristics of top-coal deformation and smash with sub-level caving mining

作　　者：李化敏[1] 周英[1] 翟新献[1] 

机构地区：[1]焦作工学院资材系,河南焦作454159

出　　处：《煤炭学报》2000年第4期352-355,共4页Journal of China Coal Society

摘　　要：以放顶煤开采现场实测为基础 ,着重探讨了顶煤的变形特征、顶煤变形与支承压力的关系 ;对比分析了“卸载降架—拉架—支撑”和“带压移架”不同移架方式对顶煤破碎效果的影响 .结果表明 ,支架的反复支撑对顶煤具有明显的破碎作用 .Based on in situ measurement with sub level caving mining, the characteristics of top coal deformation and top coal deformation vs abutment pressure are mainly discussed. The effect of top coal smash result in different manners of moving support, pressure relief and “dower support—draw support—prop up” and sliding advance of support, are analyzed with contrast. The result has shown that the again and again prop up of support has a great effect on smash of top coal.

关 键 词：放顶煤开放 顶煤变形 顶煤破碎 支承压力 

分 类 号：TD823.49[矿业工程—煤矿开采]