山西阳泉区块采动井井位优选与抽采效果分析

Optimization of Production Well Location and Analysis of Drainage Effect in Yangquan Block,Shanxi Province

为了降低矿区作业面上隅角瓦斯浓度,延长地面采动井使用年限,依据阳泉区块试验井排采数据以及寺家庄矿地层特性,提出了采动井采用三开井身结构和筛管完井技术。抽采效果表明:井位应优选在地应力低且处于高抽巷与低抽巷之间;钻孔所在回采面宽度与其离回风巷的距离的比值超过5的采动井排采周期更长;临近工作面回采时的地质扰动,以及地应力的提前释放,都将对采动井的开发起积极推动作用。

In order to reduce the gas concentration in the upper corner of the mining area and extend the service life of the surface mining well,based on the drainage data of the Yangquan block test well and the geological characteristics of the Sijiazhuang mine,it is proposed to use a the three-section casing program and screen completion technology for the mining well.The drainage effect indicates that the well position should be preferably located between high and low drainage roadway with low stress.The ratio of the width of the mining face where the borehole is located to the distance from the ventilation roadway exceeds 5,and the mining cycle of the mining well is longer.The geological disturbance near the working face and the early release of stress will play a positive role in promoting the development of mining wells.