韩城矿区兴隆煤矿开采11~#煤层底板突水分析
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摘要
通过韩城矿区兴隆煤矿水文地质补充勘探的成果,对煤矿内与11煤层开采密切的奥陶系岩性组合及水文地质条件进行了分析,认为煤矿内奥灰水具弱富水性特征;煤层底板到奥陶系顶板之间的岩性以铝土质泥岩为主,分布普遍,连续性好,为很好的隔水层;奥陶系峰峰组一段在煤矿范围内厚度稳定、分布连续,岩性组合以泥灰岩、泥云岩等难溶岩为主,对于下部上马家沟组二段含水层进入矿坑起到阻隔作用,可以作为煤矿开采11#煤层的保护层。在此基础上进行了煤矿的突水系数计算及分区,发现突水系数小于0.06MPa/m安全区的面积占到11#煤层可采面积的90%,资源量为3938万吨,占11#煤层总资源量4 228.07的93%,11#煤层的绝大部分得到解放。同时对带压开采11#煤层提出了合理的建设性意见。
Based on the results from hydrogeological complementary exploration in the Xinglong coalmine,Hancheng mining area,ana lyzed Ordovician lithologic combination closely related with No.11 coal seam mining and hydrogeological condition.The result has con sidered that the Ordovician limestone water in the coalmine has weak water yield property.Lithology between coal floor and Ordovician top is mainly bauxitic mudstone widely distributed with good continuity,thus a good aquifuge.Ordovician Fengfeng Formation first member in the coalmine has stable thickness,continuously distributed,lithologic combination is mainly insoluble marl,argillaceous do lomite,thus obstructed lower part Shangmajiagou Formation second member aquifer water inflow,can be a protective layer during No.11 coal seam mining.On this basis,has computed and partitioned coalmine water bursting coefficient,and found the area of security zone with water bursting coefficient less than 0.06MPa/m account for 90% of mineable No.11 coal seam area,amount to 39.38 million tons of resources,about 93% of total resources of 42.2807 million tons,thus the greatest part of No.11 coal seam can be mined.At the same time,constructive suggestions of No.11 coal seam mining under safe water pressure of aquifer put forward.
Based on the results from hydrogeological complementary exploration in the Xinglong coalmine,Hancheng mining area,ana lyzed Ordovician lithologic combination closely related with No.11 coal seam mining and hydrogeological condition.The result has con sidered that the Ordovician limestone water in the coalmine has weak water yield property.Lithology between coal floor and Ordovician top is mainly bauxitic mudstone widely distributed with good continuity,thus a good aquifuge.Ordovician Fengfeng Formation first member in the coalmine has stable thickness,continuously distributed,lithologic combination is mainly insoluble marl,argillaceous do lomite,thus obstructed lower part Shangmajiagou Formation second member aquifer water inflow,can be a protective layer during No.11 coal seam mining.On this basis,has computed and partitioned coalmine water bursting coefficient,and found the area of security zone with water bursting coefficient less than 0.06MPa/m account for 90% of mineable No.11 coal seam area,amount to 39.38 million tons of resources,about 93% of total resources of 42.2807 million tons,thus the greatest part of No.11 coal seam can be mined.At the same time,constructive suggestions of No.11 coal seam mining under safe water pressure of aquifer put forward.
引文
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