煤层底板突水危险性分析——以唐山市钱家营矿12煤层底板为例
投稿时间:2019-01-14  修订日期:2020-01-08  点此下载全文
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胡常清 中国矿业大学资源与地球科学学院
煤层气资源与成藏过程教育部重点实验室中国矿业大学 
huchangqing@cumt.edu.cn 
刘景 中国矿业大学资源与地球科学学院
煤层气资源与成藏过程教育部重点实验室中国矿业大学 
 
谢卫东 中国矿业大学资源与地球科学学院
煤层气资源与成藏过程教育部重点实验室中国矿业大学 
 
李伍 中国矿业大学资源与地球科学学院
煤层气资源与成藏过程教育部重点实验室中国矿业大学 
liwu@cumt.edu.cn 
中文摘要:唐山市钱家营矿地处开平向斜南东翼,地质条件复杂,为探究钱家营矿12煤层底板突水危险性,基于矿井钻孔与水文地质资料,选取钱家营矿12煤层底板受奥灰水水压、隔水层厚度、有效脆性岩层厚度以及断层与褶皱分布作为影响钱家营矿12煤层底板突水的主控地质因素,运用层次分析法对各主控因素进行评价、构造判断矩阵、计算各主控因素所占权重、引入危险性评价模型并为所得数据选取合理的界限值,最终得到钱家营矿12煤层底板突水危险性评价分区图。研究表明:钱家营矿12煤层底板突水可能性较大,尤其是构造较为发育的东北地区,对比矿井水文地质资料,评价结果与实际拟合较好。本次研究为有效防治煤层底板水害提供了理论与技术支持。
中文关键词:层次分析法  底板突水  主控地质因素  危险性分析  钱家营矿12煤层
 
Risk Analysis of Water Inrush from Coal Seam Floor: A Case Study of 12 Coal Seam Floor in Qianjiaying Mine, Tangshan City
Abstract:Qianjiaying Mine of Tangshan is located in the south-east wing of Kaiping syncline with complex geological conditions. In order to explore the risk of water inrush from the floor of 12 coal seam in Qianjiaying Coal Mine, based on boreholes and hydrogeological data of the Mine, the main geological factors affecting water inrush from the floor of 12 coal seam in the Qianjiaying Coal Mine are selected as the water pressure of Ordovician limestone, the thickness of aquifer, the thickness of effective brittle strata and the distribution of faults and folds. The Analytic Hierarchy Process(AHP) is used to evaluate the main controlling factors and to determine the structure matrix. By calculating the weights of the main control factors, introducing the risk assessment model and choosing the reasonable limit value for the data, the zoning map of water inrush risk assessment of 12 coal seams in Qianjiaying Coal Mine is finally obtained. The study shows that the possibility of water inrush from the floor of 12 coal seam in Qianjiaying Coal Mine is relatively high, especially in the northeast area where the structure is relatively developed. By comparing the hydrogeological data of the Mine, the evaluation results are in good agreement with the actual situation. This study provides theoretical and technical support for effective prevention and control of water hazards in coal seam floor.
keywords:Analytic Hierarchy Process  floor water invasion  main controlling geological factors  risk analysis  12 Coal seam of Qianjiaying Coal Mine
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