摩擦支柱π型钢梁放顶煤开采三软煤层  

SUELEVEL CAVING MINING SOF THICK COAL SEAM BETWFEN SOFT ROOF AND FLOOR WITH FRICTION PROP AND π TYPE ROOF BEAM

作　　者：马树元[1] 孙华民[1] 刘毅[1] 南存校 刘月启 

机构地区：[1]阜新矿业学院,新峰矿务局

出　　处：《东北煤炭技术》1995年第1期6-10,16,共6页

摘　　要：介绍了该工艺各环节的具体做法、放煤参数的选择、矿压显现规律和技术经济效果评价。This paper introduces the concrete courses of action,the law of strata behav-iors,and the technological and economical effect of caving mining soft thick coal seam be-tween soft roof and floor with friction prop and πtype roof beam。

关 键 词：摩擦支柱 Π型钢梁 放顶煤回采工艺 厚煤层 

分 类 号：TD823.9[矿业工程—煤矿开采]