巨厚煤层顶板离层水致灾机理研究  

Mechanism of roof separation water disaster in thick coal seam

作　　者：孙魁[1,2,3] 王英 李成[1,2,3] 陈建平[2,3] 方刚 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]矿山地质灾害成灾机理与防控重点实验室,陕西西安710054 [3]陕西省地质环境监测总站,陕西西安710054

出　　处：《河南理工大学学报（自然科学版）》2018年第2期14-21,共8页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家重点基础研究发展(973)计划项目(2013CB227901)

摘　　要：为探讨巨厚煤层顶板离层水的致灾机理,以陕西焦坪矿区某矿1418工作面为研究对象,分析其突水特征及突水地质条件,并基于"拱梁平衡理论",对可致灾离层发育层位进行了判别,对离层水发育的周期进行了计算,采用UDEC数值模拟软件,对覆岩离层及导水裂缝带的发育过程进行了模拟。结果表明:可致灾的"空腔型"离层发育在直罗组泥岩和宜君组粗砾岩之间,主关键层破断周期间隔距离为190 m;导水裂缝带发育高度约245 m,导通至洛河组下段砂岩裂隙潜水含水层;顶板离层突水具有动态周期性特点,当"空腔型"离层形成稳定"储水体"后,随着顶板覆岩破坏程度的增加以及主关键层的破断,稳定"储水体"被打破,沿导水裂缝带涌入矿井,造成突水事故;随顶板覆岩的周期性破断,离层突水周期性发生。In order to investigate the mechanism of the disaster about separation water of the coal seam roof.The paper took coal face 1418 of one mine in Shaanxi Jiaoping mining area as the research object and analyzed the characteristics and geological conditions of water inrush. Based on the "beam balance theory",the authors distinguished the disaster of the bed separation development horizon and calculated the development of bed separation water cycle interval. Using UDEC numerical simulation software,it is the development process of overburden separation and water-flowing fractures zone that were simulated. The research explained the disaster"cavity type"of bed separation development between Zhiluo Formation mudstone and Yijun Group cobble conglomerate. The interval distance between the breakage of key stratum is 190 m. The height of water flowing fractured zone is about 245 m,which conducts the phreatic aquifer of sandstone fissure groundwater in the downstream of Luohe Formation. The water inrush of the roof separation is characterized by the dynamic periodicity. With the increasing of roof strata destructiveness and breaking of key strata,stable "water store"is broken and is crushed into the coal mine by the water-flowing zone before "cavity "type of bed separation form stable water storage,which leads to the accident of water inrush. Furthermore,with the periodic rupture of the overlying strata,the water inrush of bed separation is periodically developed.

关 键 词：顶板离层水 导水裂缝带 致灾机理 巨厚煤层 

分 类 号：TD163[矿业工程—矿山地质测量]