不同留巷煤柱宽度时巷道围岩的应力分布研究

Stress Distribution Analysis on Surrounding Rock of Roadway Under Different Coal Pillar Width

为了保证煤矿安全生产并提高采出率,采用了小煤柱留巷技术,而煤柱的留设宽度影响到巷道的质量。采用摩尔—库仑模型对岩层、煤层进行模拟,通过合理简化模型,应用FLAC软件对留设5,8,10,25,35 m煤柱宽度时巷道围岩的应力分布进行了模拟。经比较分析,认为煤柱宽度为8 m时较为合适。该结论为合理确定留巷煤柱宽度提供了依据。

Retain roadway with small pillar technology was used in order to ensure safe production and raise recovery radio,but retain roadway width of pillar also influences the quanlity of roadway.The strata and coal seam were simulated using mole-coulomb model.Based on the reasonable simplification of the model,the stress distribution of roadway surrounding rock under different coal pillar width to a certain coal mine was analyzed using FLAC software.Through comparison and analysis,the suitable coal pillar width was determined to 8 m.Some basis were provided on the reasonably determination of the width of coal pillar.