矿业科学学报2026，Vol.11Issue(1)：241-252,12.DOI:10.19606/j.cnki.jmst.2025063
煤矿地下水库下压煤层开采中层间岩体裂隙网络的拓扑演化分析
Underground reservoirs-belowed coal mining-induced topological evolution of fracture networks in rock interlayer
摘要
Abstract
During the mining of lower coal seams beneath underground reservoirs,the interlayer rock mass undergoes deformation and failure due to mining-induced disturbances.Crack propagation and in-terconnection pose significant threat to reservoir safety.Taking the working faces of 2-2 and 5-2 coal seams in Shenhua Daliuta Mine as prototypes,this study conducted physical similarity simulation exper-iments to analyze stress and crack evolution patterns in interlayer rock masses during lower seam extrac-tion.We classified fractures into trace lines and segment lines to investigate the evolution of their topol-ogical and geometric characteristics.A three-phase diagram of fractures was established based on aver-age connection numbers to quantitatively evaluate connectivity.Results indicate that as mining ad-vanced,the interlayer rock mass experienced a nonlinear increase in pressure,followed by sudden pressure relief and stress fluctuations.Cracks continued to expand until reaching a maximum aperture before closing.The number of nodes in trace lines and segment lines increased with mining advance-ment,with the longest trace line typically being a horizontal bedding separation fracture.During evolu-tion,fracture networks predominantly propagated as connected clusters while maintaining spatial conti-nuity.This study provides a method for calculating the safety distance of coal seam mining beneath un-derground reservoirs and evaluating the safety of interlayer rock masses in coal mines.关键词
地下水库/层间岩体/相似模拟/裂隙演化/拓扑演化Key words
underground reservoirs/interlayer rock/similar simulation/crack evolution/topological evolution分类
矿业与冶金引用本文复制引用
程建超,欧阳迪,侯孟冬,王琪,王路军,刘殷彤,刘升贵,杨晓峰,薛东杰..煤矿地下水库下压煤层开采中层间岩体裂隙网络的拓扑演化分析[J].矿业科学学报,2026,11(1):241-252,12.基金项目
煤炭开采水资源保护与利用国家重点实验室开放基金(GJNY-20-113-04) （GJNY-20-113-04）
地球深部探测与矿产资源勘探国家重大科技专项(2024ZD1003902) （2024ZD1003902）
国家自然科学联合基金(U21B2072) （U21B2072）
隧道工程灾变防控与智能建养全国重点实验室开放基金重点课题(XD2025007) （XD2025007）
