摘要
以潞安集团李村煤矿为研究背景,在地质力学测试的基础上,采用FLAC^(3D)软件对深部高应力条件下硐室群的开挖进行数值模拟研究,分析围岩应力分布和破坏特征。结果表明:硐室群的开挖及相互扰动引起围岩应力集中和变形破坏,最终使得围岩局部失稳,处于亚稳定状态;煤岩体强度提高后,开挖造成的应力集中范围缩小,有效减弱各硐室之间的相互扰动,有利于维护硐室群的稳定性。现场试验表明采用合理的支护及加固技术能有效解决围岩变形控制的难题。
It taking Licun coal mine of Lu’an group as studying background,based on geomechanics testing,the excavation of chamber group under high stress in deep was simulated by FLAC 3D software,and then surrounding rock stress distribution and failure characteristics were analyzed.The results showed that surrounding rock stress concentration and deformation were induced by chamber group excavation and disturbance,some local failure appeared at the end,and keeping semi-balance state,after rock and coal mass strength were improved,the stress concentration scope that induced by excavation was decreased,and disturbance between different chambers were effectively weakened.The field testing showed that surrounding rock control could be effectively solved by rational supporting and reinforcement technology.
作者
李昌儒
吴拥政
褚晓威
石垚
谢俊
LI Chang-ru;WU Yong-zheng;CHU Xiao-wei;SHI Yao;XIE Jun(Mining Institute,China Coal Research Institute,Beijing 100013,China;Coal Mining & Designing Department,Tiandi Science & Technology Co.,Ltd.,Beijing 100013,China;Wuyang Coal Mine,Shanxi Lu’an Ring Energy Co.,Ltd.,Changzhi 046205,China)
出处
《煤矿开采》
北大核心
2019年第1期62-66,85,共6页
Coal Mining Technology
基金
国家重点研发计划课题(2017YFC0603003)
中煤科工集团面上项目(2018MS021)
关键词
深部高应力
硐室群
应力分布
数值模拟
high stress in deep
chamber group
stress distribution
number simulation
