放顶煤开采的步距选择  

Step-distance Selection in Sublevel Caving

作　　者：郭绍坤 赵明江[1] 侯森[1] 

机构地区：[1]铁煤集团大兴煤矿,辽宁铁岭112700

出　　处：《江西煤炭科技》2011年第4期44-46,共3页Jiangxi Coal Science & Technology

摘　　要：影响中厚煤层顶煤回收率的因素较多,除采矿地质条件、煤层赋存状态、支架类型外,放顶步距也十分重要。放顶步距的合理与否,直接影响顶煤回收率。放煤步距与中厚煤层松散冒落过程有关,简要分析了放顶煤步距的选择及特殊条件下的生产工艺。In addition to geological conditions,coal seam occurrence and support patterns,caving step distance also has an influence on top coal recovery rate in medium-thick seam and has relations with the process of loosening and breakage of medium-thick coal seam.The authors make a brief analysis of rational step-distance selection and propose the production techniques under special conditions.

关 键 词：放顶煤开采 回采工艺 步距选择 

分 类 号：TD823.49[矿业工程—煤矿开采]