摘要
文章基于工作面回采巷道在开采过程中的变形与破坏特性,研究回采巷道稳定性控制技术,结合实地数据,通过构建FLAC3D三维数值模拟体系,模拟了近距离煤层下行开采过程中的顶板压力动态和围岩应力分布变化情况。模拟结果显示,煤柱的错距对巷道稳定性具有重要影响,较小的错距会导致煤柱承受较大压力,增加煤柱失稳风险;较大的错距则能有效分散压力,减小巷道变形。将错距从原有的4 m增加至15 m,降低了煤柱所承受的垂直应力,提高了巷道稳定性。同时,针对工作面巷道支护进行了补强设计,在补强支护的作用下,巷道变形得到了有效控制。
Based on the deformation and failure characteristics of the stoping roadway in the working face during the mining process,this paper studies the stability control technology of the stoping roadway.Combined with the fi eld data,the FLAC3D three-dimensional numerical simulation system is constructed to simulate the roof pressure dynamics and the stress distribution of the surrounding rock during the downward mining of the close distance coal seam.The simulation results show that the stagger distance of the coal pillar has an important infl uence on the stability of the roadway,the smaller stagger distance will cause the coal pillar to bear greater pressure and increase its risk of instability;and the larger stagger distance can effectively disperse the pressure and reduce the deformation of the roadway.Increasing the stagger distance from the original 4 m to 15 m reduces the vertical stress on the coal pillar and improves the stability of the roadway.At the same time,the reinforcement design is carried out for the roadway support in the working face,and the deformation of the roadway is effectively controlled under the action of reinforcement support.
作者
高江涛
GAO Jiangtao(Jinneng Holding Coal Industry Group Tongxin Coal Mine,Datong 037000,Shanxi,China)
出处
《凿岩机械气动工具》
2025年第2期124-126,共3页
Rock Drilling Machinery & Pneumatic Tools
关键词
近距离煤层
回采巷道
错距优化
补强支护
adjacent coal seam
stoping roadway
stagger distance optimization
reinforcement support
