【摘要】 为研究黄土沟壑区过沟开采条件下防隔水煤岩柱留设问题，以双龙煤矿200工作面为例，针对煤矿覆岩结构特征和水文地质特征，采用工程地质类比和数值模拟方法分析了采动条件下导水裂隙带发育高度和覆岩破坏规律。结果表明，通过工程地质类比法确定200工作面裂采比为28，导水裂隙带发育高度为50.40～89.60 m；通过分析采动影响后覆岩塑性破坏区范围和垂直位移，当工作面继续推进到500 m时，煤层顶板覆岩已发生完全破坏，高度范围为51.2～95.8 m，导水裂隙带发育高度与工作面煤层的埋深和煤层厚度密切相关；200综采工作面第四系含水层留设的防水煤柱高度为58～110 m时，满足过沟开采的要求。现场实践表明，当工作面回采后，王村沟河流的水没有被导入工作面，实现了安全过沟开采和保水开采。研究结果可为黄土沟壑区煤矿过沟开采提供借鉴。更多还原

【Abstract】 In order to study the problem of retaining water proof coal and rock pillars under the condition of gully mining in loess gully area,taking the 200 working face of Shuanglong Coal Mine as an example,according to the structural and hydrogeological characteristics of overlying strata in coal mines,the development height of water-conducting fracture zone and the failure law of overlying strata under mining conditions are analyzed by engineering geological analogy method and numerical simulation method. The results show that the crack-mining ratio of 200 working face is determined to be 28 by engineering geological analogy method,and the development height of water-conducting fracture zone is 50.40～89.60 m. By analyzing the range of plastic failure zone and vertical displacement of overlying rock after mining influence,when the working face continues to advance to 500 m,the overlying rock of coal seam roof has been completely destroyed,and the height range is 51.2～95.8 m. The development height of water-conducting fracture zone is closely related to the buried depth and thickness of coal seam in working face. When the height of waterproof coal pillar in Quaternary aquifer of 200 fully mechanized mining face is 58～110 m,it meets the requirements of ditch mining. The field practice shows that after the mining of the working face,the water of the Wangcungou river is not introduced into the working face,and the safe mining and water-preserved mining are realized. The research results can provide reference for coal mining in loess gully region.更多还原