采矿与岩层控制工程学报2024，Vol.6Issue(2)：1-14,14.
膨胀应力作用下复合顶板巷道围岩支护研究
Study on surrounding rock support of composite roof roadway under expansion stress
摘要
Abstract
Faced with significant challenges of composite roof management and roadway support in the Chenghe mining area,which severely hinder safe mining operations,this study utilized the 1501 return air roadway of the No.5 coal seam in Shanyang Coal Mine as a case study to explore the failure mechanisms and support strategies for soft rock roadways beneath composite roofs.By conducting physical and mechanical experiments,the study identified the physical parameters of each rock layer within the roof and analyzed the stress distribution character-istics of the composite roof through both field measurements and theoretical analysis.This process led to the de-velopment of a comprehensive mechanical model for the composite roof of the roadway in Shanyang Coal Mine.The study proposed a support scheme that employs full anchor cable support for the roof and a combination of metal mesh,steel straps,and anchor rods for the roadway sides.The effectiveness of this scheme was then vali-dated through numerical simulation and field measurements.The results indicated that the sandy mudstone layer in the upper part of the mine's composite roof is an expansive rock with a maximum expansion rate of 42.3%and a maximum expansion stress of 198.2 kPa,making the medium-grained sandstone layer K4 a key layer.The pro-posed support scheme successfully meets on-site production needs,proving the feasibility of this new approach and offering a valuable reference for managing similar geological conditions in other mines.关键词
膨胀应力/复合顶板/围岩变形/巷道支护Key words
expansion stress/composite roof/surrounding rock deformation/roadway support分类
矿业与冶金引用本文复制引用
李宏儒,吕华文,乔军,苏波,史久林,崔锋..膨胀应力作用下复合顶板巷道围岩支护研究[J].采矿与岩层控制工程学报,2024,6(2):1-14,14.基金项目
天地科技"公司其他内部研发项目"开采设计事业部"科技创新基金"资助项目(KJ-2019-TDKCQN-05) （KJ-2019-TDKCQN-05）
