吴堡矿区首采地段水文地质特征及矿床充水条件分析
|
摘要
从鄂尔多斯盆地东部地下水类型、含水岩组等区域水文地质条件入手,对陕北石炭二叠纪煤田吴堡矿区首期开采地段水文地质条件进行了分析。分析表明,区内第四系松散层含水层在首采区虽然分别较广,但水量相对较小,正常情况下与其下含水层贯通的可能性较小,对于煤矿开采影响较小;基岩风化裂隙潜水、太原组灰岩溶隙裂隙及砂岩裂隙承压水及奥陶系灰岩岩溶承压水是煤矿开采中最为主要的突水类型。从矿坑充水水源、充水通道和充水强度角度对首期开采地段进行了矿床充水因素的研究。研究认为,矿井充水水源为煤层顶底板砂岩裂隙水、灰岩裂隙溶隙承压水及奥陶系岩溶承压水;充水通道主要是煤层开采后顶板形成的冒落带和导水裂隙带以及底板受其承压水的影响而产生的破坏带。建议在矿井设计前对首采地段进行三维地震勘探,进一步查明区内断层性质、规模和易发生矿井涌水的部位,为建井设计、矿坑底板的突水和防治提供依据。
Proceed with regional hydrogeological conditions of underground water type,aquifer system etc.in eastern Ordos basin,analyzed hydrogeological conditions in the first winning district of Wubu mine area,northern Shaanxi Permo-Carboniferous coalfield.The analysis demonstrated that although the Quaternary loose bed aquifer is rather widely distributed in the area,but the water yield is relatively smaller,very little possibility to link up with aquifers beneath,thus rather little impact on coal mining;bedrock weathering fissure phreatic water,Taiyuan Formation limestone solution fissure and sandstone fissure confined water,as well as Ordovician limestone karstic confined water are main water bursting causations during coal mining.In view of mine water filling source,channel and intensity,studied all the factors in the first winning district.The study considered that the mine water filling sources have coal roof and floor sandstone fissure water,limestone solution fissure confined water and Ordovician System karstic confined water;water filling channels are mainly fissure zones after coal seam mining formed roof caving zone and water conducted zone,confined water impacting floor destructed zone.It is advised that before the mine design,to carry out the first winning district 3D seismic prospecting,further identify nature and scope of faults in the area,and positions easy to happen mine inflow,provide bases for mine construction design,mine floor water bursting control etc.
Proceed with regional hydrogeological conditions of underground water type,aquifer system etc.in eastern Ordos basin,analyzed hydrogeological conditions in the first winning district of Wubu mine area,northern Shaanxi Permo-Carboniferous coalfield.The analysis demonstrated that although the Quaternary loose bed aquifer is rather widely distributed in the area,but the water yield is relatively smaller,very little possibility to link up with aquifers beneath,thus rather little impact on coal mining;bedrock weathering fissure phreatic water,Taiyuan Formation limestone solution fissure and sandstone fissure confined water,as well as Ordovician limestone karstic confined water are main water bursting causations during coal mining.In view of mine water filling source,channel and intensity,studied all the factors in the first winning district.The study considered that the mine water filling sources have coal roof and floor sandstone fissure water,limestone solution fissure confined water and Ordovician System karstic confined water;water filling channels are mainly fissure zones after coal seam mining formed roof caving zone and water conducted zone,confined water impacting floor destructed zone.It is advised that before the mine design,to carry out the first winning district 3D seismic prospecting,further identify nature and scope of faults in the area,and positions easy to happen mine inflow,provide bases for mine construction design,mine floor water bursting control etc.
引文
[1]刘光亚.基岩地下水[M].北京:地质出版社,1979.
[2]杨成田.专门水文地质学[M].北京:地质出版社,1981.
[3]中华人民共和国国家标准.矿区水文地质工程地质勘探规范[M].北京:中国标准出版社,1991.
[4]高春华、王卫东等,陕北石炭二叠纪煤田吴堡矿区横沟井田先期开采地段勘探报告[R].西安:陕西省地矿局西安地质矿产勘查开发院2005.
[2]杨成田.专门水文地质学[M].北京:地质出版社,1981.
[3]中华人民共和国国家标准.矿区水文地质工程地质勘探规范[M].北京:中国标准出版社,1991.
[4]高春华、王卫东等,陕北石炭二叠纪煤田吴堡矿区横沟井田先期开采地段勘探报告[R].西安:陕西省地矿局西安地质矿产勘查开发院2005.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心