【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m~3。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。更多还原

【Abstract】 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 4 396 900m~3.This research method provides theoretical methods and technical guidance for the resource utilization and reuse of coal mine goaf.更多还原