摘要
为解决冲击矿井沿空巷道煤柱合理留设的问题,结合工程实践,基于煤柱宽度对巷道围岩稳定性的影响,采用FLAC数值模拟不同宽度护巷煤柱下围岩支承压力、塑性区的演化,分析煤柱应力场变化趋势。实践表明:深井小煤柱护巷技术能够保证沿空巷道的稳定性,确保安全生产。
To solve reasonable chain pillar width of gob-side entry in rockburst mine,combined with engineering practice,based on influence of chain pillar width on the stability of surrounding rock,adopted by FLAC numerical simulation to evolve support pressure and plastic zone of surrounding rock under chain pillar width,trend of coal pillar stress change was analyzed.The practice showed that narrow coal pillar technology of gob-side entry in deep mine ensured roadway stability and safety mining.
出处
《煤炭技术》
CAS
北大核心
2014年第7期126-130,共5页
Coal Technology
关键词
冲击危险
沿空巷道
护巷煤柱
应力变化
hazard of rockburst
gob-side entry
chain pillar
stress change