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新集矿区深部1煤层底板奥灰岩溶突水危险性评价

Water inrush risk assessment of Ordovician limestone karst in the floor of deep coal seam 1 in Xinji mining area

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奥灰岩溶裂隙含水层是影响华北型煤矿深部开采的重要水害,在水-岩相互作用下奥灰含水层易导致煤层底板突水.为进一步认识奥灰岩溶突水问题,文章以新集矿区深部1煤层开采为例,利用矿区近些年最新积累的奥灰钻孔资料,选取断层强度指数、断层交叉点与尖灭点、含水层水压、富水性、隔水层等效厚度、脆塑比7个因素作为奥灰岩溶突水的主控因素,并结合层次分析法(analytic hierarchy process,AHP)确定各主控因素影响权重.运用地理信息系统(geographic information system,GIS)空间分析功能建立各主控因素专题图,通过对专题栅格图归一化处理,将各主控因素按照权重进行空间复合叠加,最终获得1煤层底板奥灰岩溶突水危险性评价分区结果.将评价结果与突水系数法计算结果对比分析可知,基于GIS的煤层底板突水危险性评价方法更符合矿区实际地质情况,可以为矿区深部煤层开采与水害防治工作提供参考依据.
The Ordovician limestone karst fissure aquifer is a main water hazard affecting the deep min-ing of North China type coal mine,and the Ordovician limestone aquifer is easy to cause water inrush in coal seam floor under the water-rock interaction.In order to further explore the Ordovician lime-stone karst water inrush,this paper took the mining of deep coal seam 1 in Xinji mining area as an ex-ample,and used the latest accumulation of borehole data of Ordovician limestone in recent years to se-lect seven factors as the main control factors of Ordovician limestone karst water inrush,namely fault strength index,fault crossing point and peak point,aquifer water pressure,water richness,equiva-lent thickness of water-proof layer and brittle-plastic ratio.The analytic hierarchy process(AHP)was used to determine the influence weights of each main control factor.Using geographic information system(GIS)spatial analysis function,thematic maps of the main control factors were established.Through the normalization of the thematic grid map,the spatial composite superposition of the main control factors was carried out according to the weight,and finally the zoning results of the risk as-sessment of Ordovician limestone karst water inrush in the floor of coal seam 1 were obtained.By comparing the evaluation results with the calculation results obtained by water inrush coefficient method,it can be seen that the GIS-based coal seam floor water inrush risk assessment method is more in line with the actual geological situation of the mining area,and can provide reference for deep coal seam mining and water hazard prevention and control.

analytic hierarchy process(AHP)geographic information system(GIS)Xinji mining are-acoal seam 1seam floorOrdovician limestonewater inrush

韩锋、詹润、孙贵、顾承串、李宏泽、雷震

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安徽省煤田地质局勘查研究院,安徽合肥 230088

安徽理工大学地球与环境学院,安徽淮南 232001

中煤新集能源股份有限公司,安徽淮南 232001

层次分析法(AHP) 地理信息系统(GIS) 新集矿区 1煤层 底板 奥陶系灰岩 突水

国家自然科学基金青年科学基金资助项目安徽省公益性地质工作资助项目中煤新集能源股份有限公司重点科研资助项目安徽省博士后科研活动资助项目

419022122021-g-2-14ZMXJ-LZ-JS-2020-162020B417

2024

10.3969/j.issn.1003-5060.2024.08.011

合肥工业大学学报(自然科学版)
合肥工业大学

合肥工业大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.608
ISSN：1003-5060
年,卷(期)：2024.47(8)