摘要
采用长臂式分层开采的方式对厚煤层进行开采的过程中,由于巷道的布置造成矿井的采出率低,并且煤柱内容易产生应力集中,造成巷道的危险。针对这一情况,对分层开采过程中,内错式及外错式两种不同的巷道分布方式进行仿真分析,结果表明,采用内错式分布时,内错距离的增加,会降低顶板的垂直方向的下沉量,降低作用逐渐减弱;在采用外错式分布时,外错距离的增加,使得顶板的下沉量呈现先减小后增加的趋势,容易造成顶板的塌陷。要根据煤层的赋存条件,确定下层巷道的分布方式,提高矿井的采出率,并提高巷道的寿命,保证矿井的安全。
In the process of mining thick coal seam by long arm layered mining, due to the layout of roadway, the recovery rate of mine is low, and stress concentration is easy to occur in coal pillar, resulting in the danger of roadway. In view of this situation, the simulation analysis of two different roadway distribution modes of internal dislocation and external dislocation in the process of layered mining is carried out. The results show that when the internal dislocation distribution is adopted, the increase of internal dislocation distance will reduce the vertical subsidence of roof and gradually weaken the reduction effect. When adopting external staggered distribution, the increase of external staggered distance makes the subsidence of roof decrease first and then increase, which is easy to cause roof collapse. According to the occurrence conditions of the coal seam, the distribution mode of the lower roadway is determined. The recovery rate of the mine and the service life of the roadway are improved. And the safety of the mine is ensured.
作者
孙建文
SUN Jianwen(Sitai Coal Mine of Jinneng Holding Coal Industry Group Co.,Ltd.,Datong Shanxi 037003,China)
出处
《山西化工》
2021年第5期153-155,共3页
Shanxi Chemical Industry
关键词
分层开采
内错式
外错式
顶板下沉
layered mining
internal error type
external error type
roof subsidence
