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
friction prop,π type roof bearn,sublevel caving mining teclinology,soft coalseam between soft roof and floor
