宿州学院学报2025，Vol.40Issue(6)：58-64,7.DOI:10.3969/j.issn.1673-2006.2025.06.010
钱营孜煤矿西三采区32煤覆岩工程岩组特征及采动效应研究
Study on Engineering Rock Group Characteristics and Mining Effect of 32 Coal Overburden in Xisan Mining Area of Qianyingzi Coal Mine
摘要
Abstract
The study of rock formations and mining failure characteristics in coal seam overburden engineering is of great significance for effectively carrying out roof water control engineering.This article focuses on the occurrence characteristics of the overlying rock strata of the 32 main coal seam in the West Third Mining Area of Qianyingzi Coal Mine,and analyzes the combination characteristics of different rock strata in the roof of the 32 coal seam.A nu-merical model of the first mining face was established using FLAC 3D simulation to investigate the plastic failure patterns induced by mining activities.The research findings include:The overburden of the 32 coal seam exhibits"moderate to good"rock mass quality and"moderately intact to relatively intact"integrity.The overlying rock for-mation develops roof sandstone thick type,roof sandstone mudstone interbedded type,mudstone thick type,and roof overlying sandstone type,with sandstone-to-mudstone thickness ratios ranging from 0.22 to 9.48(1.06 averaged).Numerical simulations revealed a maximum plastic failure height of 57 m in the roof strata,confirming that mining-induced fractures do not connect with the underlying aquifer under normal geological conditions.Safe coal mining can be achieved through optimized panel design parameters,rational retention of sand-prevention coal pillars,and targeted hydraulic fracturing control techniques.The research results can provide reference for the study of the fai-lure law of coal seam overburden and the technical system of roof water prevention and control in other mining areas(wells)under similar conditions.关键词
覆岩岩组结构/采动效应/顶板水害/"两带"高度/钱营孜煤矿Key words
overburden rock group structure/mining effect/roof water damage/"two-belt"height/Qianyingzi Coal Mine分类
矿业与冶金引用本文复制引用
汪伟民,李俊,许继影,李为琦,程龙艺..钱营孜煤矿西三采区32煤覆岩工程岩组特征及采动效应研究[J].宿州学院学报,2025,40(6):58-64,7.基金项目
国家自然科学基金项目(42402250) （42402250）
安徽省高校优秀科研创新团队(2022AH010081) （2022AH010081）
宿州学院博士(后)科研启动基金项目(2022BSK031). （后）
