彬长矿区复杂地质条件下覆岩导水裂隙带发育特征研究  

Study on development characteristics of water-conducting fracture zone in overlying rock under complex geological conditions in Binchang mining area

作　　者：李国平 刘宝玉 于可伟 李盼盼 蔚波 Li Guoping;Liu Baoyu;Yu Kewei;Li Panpan;Yu Bo(Bin County Coal Co.,Ltd.,Xianyang 712000,China;Shaanxi Huabin Yadian Coal Co.,Ltd.,Binzhou 713500,China;China Coal Technology and Engineering Group Xi′an Research Institute(Croup)Co.,Ltd.,Xi′an 710077,China)

机构地区：[1]彬县煤炭有限责任公司,陕西咸阳712000 [2]陕西华彬雅店煤业有限公司,陕西彬州713500 [3]中煤科工西安研究院(集团)有限公司,陕西西安710077

出　　处：《能源与环保》2024年第9期127-132,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：陕西省自然科学基础研究计划重点项目(2023-JC-ZD-27);天地科技股份有限公司科技创新创业资金专项重点项目(2022-2-TD-ZD005)。

摘　　要：彬长矿区雅店煤矿主采1煤和4煤,分别采用一次性采全高和综放开采2种采煤方式进行回采,为了研究不同开采方式下覆岩破坏规律,以雅店煤矿ZC1101工作面和ZF1405工作面为例,分别采用经验公式、数值模拟和现场实测3种手段,计算不同开采方式下导水裂隙带发育高度,并采用钻孔降水头注水试验的方法,对煤层开采后顶板含水层渗透性变化规律进行研究。研究结果表明,一次性采全高开采条件下导水裂隙带发育高度为113 m,裂采比为37.7倍;综放开采条件下导水裂隙带发育高度为245 m,裂采比为21.5倍;煤层开采后受采动破坏影响,上覆含水层渗透系数增大5~10倍。此研究成果可作为矿井制定防治水技术措施的重要依据,同时,也可丰富彬长矿区导水裂隙带高度发育的数据库。Yadian Coal Mine in Binchang mining area mainly mines 1 coal and 4 coal,and adopts two mining methods of one-time full-height mining and fully-mechanized caving mining respectively.In order to study the failure law of overlying strata under different mining methods,taking ZC1101 working face and ZF1405 working face of Yadian Coal Mine as examples,the development height of water-conducting fracture zone under different mining methods is calculated by empirical formula,numerical simulation and field measurement,and the permeability change law of roof aquifer after coal seam mining is studied by means of borehole dewatering head water injection test.The results show that the development height of water-conducting fracture zone is 113 m under the condition of one-time full-height mining.The crack-mining ratio is 37.7 times.Under the condition of fully-mechanized caving mining,the development height of water-conducting fracture zone is 245 m,and the crack-mining ratio is 21.5 times.After coal seam mining,the permeability coefficient of overlying aquifer increases by 5~10 times due to mining failure.The research results can be used as an important basis for the formulation of technical measures for water prevention and control in mines,and can also enrich the database of the height development of water-conducting fracture zones in Binchang mining area.

关 键 词：侏罗纪煤田 覆岩破坏规律 采煤方式 注水试验 渗透性变化 

分 类 号：TD823[矿业工程—煤矿开采]