摘要
为了研究大同煤矿集团四台矿103下01工作面前方轨道顺槽与采区边界巷之间煤柱随着工作面向前推进应力分布及演化规律,通过FLAC3D数值模拟软件分别模拟当工作面推进60、120、180、240、300、360 m时煤柱的应力分布情况。结果表明,工作面前方煤柱应力峰值在工作面推进180 m后稳定在40 MPa,工作面后方煤柱应力值在工作面推进180 m时,煤柱上的应力最大为80 MPa,但在工作面推进到240 m后应力峰值变小,并稳定在60 MPa。结合KJ550应力在线监测系统对工作面前方煤柱应力进行监测,数值模拟和KJ550应力在线监测的结果表明,当工作面推进240 m后,工作面前方煤柱与后方煤柱上应力的峰值都比较稳定,诱发冲击地压的可能较小。
In order to study the stress distribution and evolution law of coal pillars along the working face in front of the 103 下 01 working face of Sitai Mine of Datong Mining Group, the FLAC3D numerical simulation software was used to simulate the working face. The stress distribution of coal pillars was at 60, 120, 180, 240, 300, 360 m. The results showed that the peak stress of the coal pillar in the working face was stable at 40 MPa after the working face mined for 180 m, and the stress of the coal pillar behind the working face was 180 m, when the stress on the coal pillar was 80 MPa at most. After the surface was advanced to 240 m, the stress peak became smaller and stabilized at 60 MPa. The KJ550 stress online monitoring system was used to monitor the stress of the coal pillar in front of the working face. The numerical simulation and the on-line monitoring of the KJ550 stress showed that the peak of the stress on the front of coal pillar and the rear coal pillar were compared when the working surface mined 240 m, the peak stress on the front and rear coal pillars of the working face was stable, which may cause less coal burst.
作者
连清飞
Lian Qingfei(Sitai Mine, Sited Datong Coal Mine Group Corporation Ltd., Datong 037000, China)
出处
《煤炭与化工》
CAS
2019年第9期38-40,共3页
Coal and Chemical Industry
关键词
应力峰值
稳定性
煤柱
冲击地压
stress peak
stability
coal pillar
impact ground pressure
