黑龙江科技大学学报2024，Vol.34Issue(2)：188-194,7.DOI:10.3969/j.issn.2095-7262.2024.02.004
重复采动覆岩导水裂隙发育规律及注浆加固数值模拟
Development law behind water conductivity cracks in overburden rock under repeated mining and numerical simulation of grouting reinforcement
摘要
Abstract
This paper describes an investigation into the development law behind overburden failure height under repeated mining in multiple seam.The study taking Xin'an coal mine water blocking survey as the engineering background,involves theoretically analyzing the development mechanism of overlying rock fractures under repeated miningand the calculation method of fracture zone height,studying the fail-ure characteristics of overlying rock under repeated mining using 3DEC numerical simulation,grouting in waterproof layer for reinforcement;and simulating overburden movement differences before and after rein-forcement.The results show that by numerical simulation,the vertical displacement maximum of the top plate working face in 10#coal reaches 4.3 m,the crack height maximum develops to 63 m,and basically consistent with the calculated height of the conductivity 60.7 m based on the rock layer tensile ratio.Re-inforcing the upper part of the mining area by injecting cement ash material reduces the developing height of the water conducting fracture zone,which provides certain reference for prevention and control of water hazards in Xin'an mining area.关键词
重复采动/覆岩破坏/导水裂隙带Key words
repeated mining/overburden rock failure/water conducting fracture zone分类
矿山工程引用本文复制引用
金珠鹏,田彦卫,王洋洋..重复采动覆岩导水裂隙发育规律及注浆加固数值模拟[J].黑龙江科技大学学报,2024,34(2):188-194,7.基金项目
黑龙江省"揭榜挂帅"科技攻关项目(2021ZXJ02A03) （2021ZXJ02A03）
