【摘要】 依据大量的现场实测资料，总结了中硬覆岩厚煤层长壁冒落开采条件下炮采、综采及综放开采方法对导水裂缝带发育高度及其分布形态的影响．提出减小初次开采厚度以降低导水裂缝带发育高度；增大重复开采厚度以提高采煤工效和矿井经济效益；在顶水采煤时，若对厚煤层采用分层与放顶煤相结合的采煤方法，则既能控制导水裂缝带的发育高度，又可降低采煤生产成本．更多还原

【Abstract】 Based on a large amount of practical measured information, the effects of drill and blasting, fullymechanized mining and fullymechanized sublevel caving method on development height and distribution pattern of water flowing fractured zone are summed up under the condition of thick seam longwall caving mining in medium hard overlying strata, thus put forward that decreasing primary mining thickness to reduce the development height of water flowing fractured zone; increasing repeated mining thickness to improve mining efficiency and economic results; during mining, if slice mining combined with sublevel caving method in thick seam, it can control the development height of water flowing fractured zone and reduce production cost as well.更多还原