宁夏灵新煤矿采空区破损围岩的储水特征研究  

Research on Groundwater Reservoir Characteristics of Damaged Surrounding Rock in the Goaf Area of Lingxin Coal Mine in Ningxia

作　　者：虎晓龙 王恩志[2] 刘晓丽[2] 宋喜东 王玉凯 姚文理 HU Xiaolong;WANG Enzhi;LIU Xiaoli;SONG Xidong;WANG Yukai;YAO Wenli(Lingxin Coal Mine,Ningxia Coal Industry Co.,Ltd.,Ningxia National Energy Group,Yinchuan,Ningxia 751410;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084;School of Civil Engineering,North China University of Technology,Beijing 100144)

机构地区：[1]国家能源集团宁夏煤业有限责任公司灵新煤矿,宁夏银川751410 [2]清华大学水圈科学与水利工程全国重点实验室,北京100084 [3]北方工业大学土木工程学院,100144

出　　处：《中国煤炭地质》2024年第12期1-5,共5页Coal Geology of China

基　　金：宁夏回族自治区重点研发计划项目(2018BCG01003);清华大学水沙科学与水利水电工程国家重点实验室项目(2022-KY-02)。

摘　　要：煤矿工作面开采结束后的采空区具备修建地下水库的优势,采空区上覆破损岩体的导水特性是煤矿地下水库建设的核心技术之一。以灵新煤矿为研究对象,通过采用理论分析、数值模拟和现场试验等方法,对灵新煤矿一采区北翼采空区破损围岩的孔隙率展开深入研究。基于灵新煤矿上三带岩性分类和强度特征,确定了15#煤层、16#煤层的最大垮落带高度,分别为15.3m和11.26m。采用3D-DDA数值模拟法确定灵新煤矿垮落带及导水裂隙带形态特征,利用图像对比法计算出垮落带的孔隙率约为0.201,导水裂缝带的孔隙率为0.086。根据灵新煤矿地下水库储水空间及储水系数,计算得出总库容为439.69万m3。该研究方法为煤矿采空区的资源化再利用提供了理论方法与技术指导。The goaf after the completion of coal mining has the advantage of constructing underground reservoirs,and the water conductivity characteristics of the overlying damaged rock are one of the core technologies for the construction of underground reservoirs in coal mines.Taking Lingxin coal mine as the research object,this study conducts in-depth research on the porosity of damaged surrounding rock in the goaf of the north wing of the first mining area of Lingxin coal mine through theoretical analysis,numerical simulation,and field experiments.Based on the lithological classification and strength characteristics of the upper three zones of Lingxin coal mine,the maximum caving zone heights of the 15#and 16#coal seams were determined to be 15.3m and 11.26m,respectively.The 3D-DDA numerical simulation method was used to determine the morphological characteristics of the caving zones and water conducted zones in Lingxin coal mine.The porosity of the caving zones was calculated to be about 0.201 and the porosity of the water conduced zones was 0.086 using image comparison method.According to the water storage space and storage coefficient of the underground reservoir in Lingxin coal mine,the total storage capacity is calculated to be 4396900m3.This research method provides theoretical methods and technical guidance for the resource utilization and reuse of coal mine goaf.

关 键 词：采空区利用 地下水库 储水系数 数值模拟 库容曲线 灵新煤矿 

分 类 号：TD983[矿业工程—选矿]