济源二矿23101孤岛工作面上方水体探测及裂隙预测

Water Detection and Fracture Prediction above 23101 Island Working Face in Jiyuan No.2 Coal Mine

23101孤岛工作面的上方和相邻采空区积水量及范围难以确定,为确保23101孤岛工作面顺利开采,避免发生突水事故,采用地面瞬变电磁法对工作面上方和相邻采空区可能积水范围进行勘查,并结合工作面开采前后导水裂隙带发展的理论预测模型,得出主要结论。瞬变电磁结果显示,23101孤岛工作面上方存在7个低阻异常区,其中,低阻异常区1、低阻异常区2、低阻异常区5、低阻异常区7对工作面的回采有直接影响。23101孤岛工作面回采前后导水裂隙带理论预测模型结果表明,导水裂隙带的发育有极大的可能导通低阻异常区,有透水风险,回采前需要对异常区进行钻探验证或超前防水作业,保证工作面的安全回采。

It is difficult to determine the water volume and scope of the mined-out area above and adjacent to 23101 island working face, in order to ensure the smooth mining of 23101 island working face and avoid water inrush accident, in this paper,ground transient electromagnetic method was used to explore the possible water area above the working face and adjacent goaf,and combined with the theoretical prediction model of the development of water-conducting fracture zone before and after the mining of the working face, the main conclusions were drawn. Transient electromagnetic results show that there are seven low resistance anomaly zones above 23101 island working face, among which low resistance anomaly zones 1, 2, 5 and 7 have a direct influence on the mining of working face. The theoretical prediction model of water-conducting fracture anomaly zone before and after stoping of 23101 island working face shows that the development of water-conducting fracture zone is highly likely to lead to the low resistance abnormal area and has the risk of water permeability. Before stoping, drilling verification or advance waterproof operation should be carried out in the abnormal area to ensure the safe stoping of the working face.