煤炭工程 ›› 2016, Vol. 48 ›› Issue (4): 54-57.doi: 10.11799/ce201604017

• 生产技术 • 上一篇    下一篇

浅埋近距离下层煤综采面过上覆采空区煤柱动压防治技术

侯志成   

  1. 神东煤炭集团公司生产管理部
  • 收稿日期:2015-03-29 修回日期:2015-05-24 出版日期:2016-04-10 发布日期:2016-04-18
  • 通讯作者: 侯志成 E-mail:houzch@163.com

Technology on Dynamic Mine Strate Pressure of Long Fully Mechanized Mining Face of Passing Through concentrated coal pollar of Overburden Goaf in Shallow Seam Longwall Mining

  • Received:2015-03-29 Revised:2015-05-24 Online:2016-04-10 Published:2016-04-18

摘要: 基于神东矿区浅埋近距离下煤层过上覆采空区集中煤柱易发生动载矿压,导致大面积切顶压架事故,结合石圪台矿31201综采面动压防治实践,分析得出采动影响导致上覆采空区集中煤柱失稳及其上覆基岩破断、回转,进而使下煤层基岩关键块结构由回转失稳变为突发性的滑落失稳,上下基岩层关键块体失稳产生的冲击载荷瞬间作用直接导致了动压事故的发生。通过采取爆破集中煤柱、缩短工作面长度、等压等技术措施,并采用微震监测、地面钻孔多点位移计和地表沉降观测等手段进行指导和验证,有效解决了特殊开采条件下现场动载矿压防治的问题,实现了安全生产。

关键词: 浅埋煤层, 近距离煤层群, 上覆采空区, 集中煤柱, 动载矿压, 微震监测

Abstract: According to the serious influence of the dynamic mine strat pressure under concentrated coal pollar of gob in shallow seam longwall mining of shengdong mining area, Combined the example of No.31201 coal mining of Shigetai Mine,the paper analyzed mechanism of the accident,the rotary of gob bedrock by the instability of concentrated coal pollar,then the lower coal seam bedrock was destroyed, the dynamic mine strate pressure was casde by the impact load of the upper and lower bedrock. Adopting measures of blasting of coal pollar、shortening the length of face、yield mining and so on, and guided and validated by the microseismic monitoring、internal displacement monitoring and surface ground observation,through the measures to solve the problem of prevention of the dynamic mine strate pressure,to realize safe production.

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