摘要
顶板富水区采前疏水降压可诱发的工作面矿压显现,给顶板富水工作面煤层安全开采带来威胁。本文结合余吾煤业N1105工作面疏水降压过程,对顶板富水工作面疏水后回采进行微震监测,发现在顶板疏水后,富水区边缘及其外部的微震事件频次和能量远远高于富水区域内,微震能量峰值位置距富水区边缘70~80 m,说明此区域为矿压显现防治重点区域。研究结果可以为煤矿顶板疏水降压引起的矿压事故防治提供一定的指导。
The drainage and depressurization before mining in the roof water abundance area could induce the mining pressure behavior of the working face,which posed a threat to the safe mining of the coal seam in the roof water abundance working face.In this paper,combined with the drainage and depressurization process of No.N1105 Face in Yuwu Coal Industry,microseismic monitoring was carried out on the mining of roof water abundance working face after drainage.It was found that after the roof was drained,the frequency and energy of microseismic events at the edge of the water abundance area and its outside were much higher than those in the water abundance area.The peak position of microseismic energy was 70-80 m away from the edge of the water abundance area,indicating that this area was the key area for the prevention and control of mine pressure.The research results could provide guidance for the prevention and control of mining pressure accidents caused by drainage and depressurization of coal mine roof.
作者
芦盛亮
司广宏
郝军
Lu Shengliang;Si Guanghong;Hao Jun(Yuwu Coal Industry Co.,Ltd.,Lu’an Chemical Group,Changzhi 046000,China)
出处
《煤炭与化工》
CAS
2023年第9期57-60,共4页
Coal and Chemical Industry
关键词
顶板富水工作面
疏水
矿压
微震事件
roof water abundance working face
drainage
mining pressure
microseismic events
