›› 2011, Vol. 32 ›› Issue (10): 3053-3057.

• 基础理论与实验研究 • 上一篇    下一篇

覆岩中断层活化突水的力学分析及其应用

师本强1,侯忠杰2   

  1. 1.西安科技大学 地质与环境学院,西安710054;2.西安科技大学 能源学院,西安 710054
  • 收稿日期:2010-01-20 出版日期:2011-10-10 发布日期:2011-10-13
  • 作者简介:师本强,男,1968年生,硕士,讲师,从事地质工程和采矿工程的研究
  • 基金资助:

    教育部博士点基金资助项目(No. 20050504003)

Mechanical analysis of fault activation water inrush in over burden rock and its application

SHI Ben-qiang1, HOU Zhong-jie2   

  1. 1. School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; 2. School of Energy Source, Xi’an University of Science and Technology, Xi’an 710054, China
  • Received:2010-01-20 Online:2011-10-10 Published:2011-10-13

摘要: 据资料统计,国内煤矿的突水淹井事故80%以上是由断层引起的,大多数是原始地质条件下的非导水断层在采动影响下活化发生突水。出于安全生产和保水采煤的需要,对采场覆岩中断层因工作面的推进而活化突水进行力学分析,研究防止断层活化突水和保水采煤的开采方法。由摩尔-库仑破坏准则得出断层的活化准则,推导出断层活化的临界倾角、断层活化时的临界开采深度和间隔式开采断层活化时工作面临界推进距离。结果表明,断层的破坏形式与断层倾角有很大关系,随着断层倾角的增大,断层的破坏形式依次表现为,随着工作面的推进断层和覆岩一同破坏、剪切破坏和拉破坏。断层倾角越大,越容易活化。以大柳塔煤矿保水采煤为例,应用研究成果计算了间隔式开采工作面的临界推进距离,并且以相似模拟试验验证了计算结果。

关键词: 断层活化突水, 力学分析, 保水采煤, 间隔式开采, 相似模拟试验

Abstract: According to statistics, the eighty percent of water inrushes and submerged well accidents were induced by the faults in China. Most of them were induced by the fault activation affected by the workface advanced in non-water-transmissible faults under the condition of original geology. Owing to the need of safe production and water-preserved mining, the activation and water inrush of faults in overburden rock due to the advance of workface were analyzed with mechanics. The mining methods of both preventing fault activation water inrush and water-preserved mining were researched. The fault activation criterion was deduced by the Mohr-Coulomb failure criterion. The calculating formula of critical obliquity and the critical mining depth of the fault activation were deduced. The calculating formula of critical advanced distance was deduced in activating of the fault for the interval mining method adopted. The results show that the failure form of the fault has prodigious relation with the obliquity of fault. With the increase of fault obliquity, the failure form of fault show successively: simultaneity failure of the fault with overburden rock in advancing of the workface, shear failure and tension failure. The more the increase of fault obliquity becomes, the easier activation of fault becomes. According to research result, the critical advanced distance was calculated when the interval mining method adopted, following the example of water-preserved mining at Daliuta mine. The calculated result was validated by the use of a similar simulation.

Key words: fault activation water inrush, mechanical analysis, water-preserved mining, interval mining, similar simulation experiment

中图分类号: 

  • TD 823.83
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