近距离上保护层开采瓦斯综合防治技术研究

Study on Comprehensive Gas Control Techniques of Closing Protective Layer Mining

平煤六矿戊8-22180工作面作为上保护层开采后,会对采空区周围的煤岩层产生一定的卸压作用,同时会在保护层的上方和下方一定范围内产生离层裂隙和竖直裂隙,对于下方被保护层来说,就会改变被保护层区域内的应力、应变状态和煤层瓦斯参数,尤其卸压释放出的瓦斯会沿着裂隙向采空区及采面运移,造成生产期间瓦斯较大。针对这一现象,采用了卸压瓦斯抽放、上隅角瓦斯抽放以及增加风量等方法来治理采空区的瓦斯,并通过数据的收集与分析考察治理效果,得出了戊8-22180工作面的瓦斯涌出规律。

After mining the E8-22180 face in Pingdingshan six mine as the protective layer, it will rock around the empty area of the coal produced some relief role, and it will also produce a vertical separation cracks and fissures within a certain range above and below the protective layer. For the bottom layer is protected, it will change the stress level in the region to be protected, the strain state and coal seam gas parameters, in particular the release of the relief will transport gas to the mined-out area and surface mining along the fissure, resulting in the production during a large gas. In response to this phenomenon,use a pressure relief gas drainage, on the corner gas drainage and increasing the amount of wind and other methods to control goaf gas, and through the collection and analysis investigated the treatment effect data obtained E8- 22180 face gas emission law.