煤炭工程 ›› 2013, Vol. 45 ›› Issue (9): 41-43.doi: 10.11799/ce201309016

• 施工技术 • 上一篇    下一篇

松软煤层动压巷道围岩控制机理研究及合理支护设计

李兵   

  1. 太原理工大学矿业工程学院
  • 收稿日期:2012-10-25 修回日期:2012-11-14 出版日期:2013-09-10 发布日期:2013-09-10
  • 通讯作者: 李兵 E-mail:116594421@qq.com

The research on the deformation failure of soft coal seam under dynamic pressure and reasonably supporting design

  • Received:2012-10-25 Revised:2012-11-14 Online:2013-09-10 Published:2013-09-10

摘要:

摘要:针对五一煤矿9+10#松软煤层动压巷道围岩变形量大、支护困难这一问题,基于岩层钻孔窥视及巷道数值模拟分析,对采动压力作用下的松散煤层巷道变形破坏特征进行了研究,得出巷道两帮的变形破坏将导致顶板离层量的增加,而顶板离层的增加进一步加剧两帮挤压破碎,最终造成巷道围岩的整体性失稳。基于松软煤层动压巷道围岩破坏机理的研究,得出该类条件下巷道围岩控制原则,并对回采巷道合理的支护方式及支护参数进行了设计,现场工业性试验表明,受回采影响,巷道两帮最大移近量为500mm,顶底板最大移近量为900mm,满足了工作面回采的要求。

关键词: 关键词:松软煤层, 数值模拟, 钻孔窥视, 动压巷道, 破坏机理, 支护设计

Abstract:

Abstract:According to the problem of large deformation and support difficulty of 9+10#soft coal seam road under dynamic pressure roadway of Wu Yi coal mine,the methods of borehole imaging and numerical simulation were applied to analysis the mechanism of deformation failure of soft coal seam under dynamic pressure. Receiving the conclusion that the deformation and destruction of roadway’s two sides will lead to the increase of roof abscission layer, and the further increase of roof abscission layer will aggravate the extrusion of sides,thus causing the instability of surrounding rock. Based on the research of surrounding rock destruction mechanism of soft coal seam roadway under dynamic pressure,the support way and parameters of roadway are reasonably designed. The industrial test showed that the roadway sides and roof-to-floor convergence are 500mm and 900mm respectively influenced by mining. The roadway bolting technology meets the requirements of mining face.

Key words: Key words:soft coal seam, numerical simulation, borehole imaging, dynamic pressure, deformation failure, supporting design