预抽瓦斯与深孔注水在动力灾害中的技术实践

Study on Gas Pre- drainage and Deep- hole Water Infusion in Prevention of Mining Dynamic Disaster

为了解决某矿121305工作面动力灾害频发这一问题,本文提出建立开采动力灾害区域预测预防体系,首先从瓦斯地质、掘进预测指标及工作面开采应力集中角度进行区域危险性预测,并结合工作面实际情况确定危险区域位置,然后对危险区域实施预抽瓦斯与深孔注水技术,最后对该技术的实际效果进行了分析。结果表明:对重点防范区域实施预抽瓦斯与深孔注水技术后,煤体的残余瓦斯含量降至3 m3/t以下,煤体含水量增量达到3%以上,使危险区域的动力现象得到缓解,成功的确保工作面安全、高效回采。

In order to solve the problem of dynamic disasters in 121305 working face of a coal mine. It is proposed that the establishment of mining dynamic disaster predicting system. At first, to predict the danger zone from the gas geology, tunneling prediction index and face mining stress concentration, combined with the actual situation to determine the risk area in working face, then the implementation of the gas pre - drainage and deep -hole water infusion technology to the risk area, at last, effect analysis on this technology. The results show that： after implementing this technique the residual gas content of coal body to below 3m3/t, dynamic phenomena in hazardous area ease, it is success to ensure safe, efficient mining working face.