兖州横河煤矿防水煤柱工程地质研究有创新兖州矿务局横河煤矿与中国矿业大学合作，对该矿先期采区厚含水松散层下采煤防水煤柱的国设进行研究。以往兖州煤田３＃煤层分层开采防水煤柱多按导水裂隙带高８０ｍ来设计。研究认为，３＃煤层开采顶分层后的导水裂隙带高度为６０... Yanzhou Yokogawa coal mine waterproof pillar engineering geology innovation Yanzhou Mining Bureau Yokogawa coal mine in cooperation with China University of Mining and mining of the coal mine in the pre-mining area thick coal loose coal seam pillar under the state-owned research. In the past, Yanzhou coal seam 3 # coal seam multi-layered mining waterproof pillars by the hydraulic fracturing zone 80m high to design. According to the study, the height of the water-conducting fracture zone after the top stratification in the 3 # seam mining is 60 ...