摘要
由于煤柱宽度以及相对工作面位置的不同,围岩应力重新分布将对巷道稳定性产生重要影响。运用FLAC数值模拟软件,对不同煤柱宽度的沿空巷道应力场分布规律进行了模拟研究。结果表明:巷道围岩稳定性是煤柱宽度变化引起巷道围岩应力分布及其演化共同作用的结果;开采深度为600～900 m时,煤柱宽度宜为3～4 m;当开采深度超过900 m时,煤柱宽度应为4～5 m。
Because the width of coal pillar is variant and the rel- ative location of coal pillar and face is different, the stability of gateway will is seriously influenced by the stress redistribution. The simulation study on the distribution law of stress field in the surrounding rock of gateway along goaf under different width of coal pillar was made using FLAC software. The results showed that the stability of gateway depends on the combined action of the stress distribution in the surrounding rock induced by differ- ent width of coal pillar and the evolution of stress field in coal entity and coal pillar;when the mining depth is between 600 m and 900 m, the width of coal pillar should be between 3 m and 4 re;when the mining depth is above 900 m, the width of coal pil- lar should be between 4 m and 5 m.
出处
《矿业研究与开发》
CAS
北大核心
2012年第3期93-95,共3页
Mining Research and Development
基金
国家自然科学基金项目(50774082)
关键词
窄煤柱
沿空掘巷
应力分布
数值模拟
Narrow coal pillar, Gateway driving along goaf,Stress distribution, Numerical simulation
