摘要
针对煤矿深部开采冲击地压灾害治理难题,利用颗粒流软件设置不同钻孔数量、不同钻孔间距两个变量,研究其卸压效果。模拟结果表明:钻孔数量越多、钻孔间距越小,峰值强度越低,卸压效果越好。根据实时裂纹数随加载过程的变化,试样的破裂过程总体呈现“平静-缓增-急增”三个阶段,累计微裂纹数量变化也与钻孔参数相关。
In view of the difficult problem of rock burst disaster governance in deep mining of coal mines,the particle flow software is used to set two variables,namely,the number of drilling and the spacing between different drilling,to study its pressure relief effect.The simulation results show that the more the number of drilling,the smaller the spacing between drilling,the lower the peak strength,and the better the pressure relief effect.According to the variation of real-time crack amount with the loading process,the overall fracture process of the sample presents three stages:"calm-slow increase-rapid increase",and the cumulative change in the number of microcracks is also related to the drilling parameters.
作者
朱油雷
Zhu Youei(Energy Bureau of Shuicheng District,Liupanshui City,Guizhou Province,Guizhou Liupanshui 553600)
出处
《山东煤炭科技》
2023年第9期186-189,共4页
Shandong Coal Science and Technology
关键词
钻孔
颗粒流程序
卸压效果
裂纹数
drilling
particle flow program
pressure relief effect
crack amount
