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现代矿业 ›› 2019, Vol. 35 ›› Issue (08): 199-201.

• 安全·职业健康 • 上一篇    下一篇

冲击危险工作面大直径卸压钻孔深度优化

张永东1,朱亚威2,张恒3   

  1. 1.山东丰源远航煤业有限公司北徐楼煤矿;2.黑龙江科大欣欣环保科技有限公司;3.中国矿业大学矿业工程学院
  • 出版日期:2019-08-25 发布日期:2019-09-29

Optimization of Large Diameter Pressure Relief Borehole Depth in Impact Dangerous Working Face

Zhang Yongdong1,Zhu Yawei2,Zhang Heng3   

  1. 1.North Xulou Coal Mine, Shandong Fengyuan Yuanhang Coal Industry Co.,Ltd.;2.Heilongjiang Keda Xinxin Environmental Protection Technology Co.,Ltd.;3.School of Mines,China University of Mining & Technology)
  • Online:2019-08-25 Published:2019-09-29

摘要: 采用FLAC2D数值模拟软件,以跃进煤矿25110工作面地质条件为基础,建立了大直径钻孔卸压深度的优化模型,结合能量传播衰减理论,得到了钻孔卸压后的冲击危险指数表达式,并在一定的参数条件下分析并比较了不同深度大直径卸压钻孔的卸压效果。研究表明:25110工作面大直径卸压孔深度为45 m时,冲击危险指数最小,卸压效果最明显。

关键词: 冲击地压, 大直径钻孔, 数值模拟, 钻孔优化, 卸压效果

Abstract: Based on the geological conditions of Yuejin Coal Mine 25110 working face,the optimization model of pressure relief depth of large diameter boreholes is established by using FLAC2D numerical simulation software.Combining with the theory of energy propagation attenuation,the expression of impact risk index after pressure relief of boreholes is obtained.The pressure relief effect of large diameter pressure relief boreholes with different depths is analyzed and compared under certain parameters.The simulation results show that when the depth of large diameter pressure relief hole in 110 working face is 45 m,the impact risk index is the smallest and the pressure relief effect is the most obvious.

Key words: Rock burst, Large diameter borehole, Numerical simulation, Borehole optimization, Pressure relief effect