高瓦斯强突出煤层群首采保护层瓦斯治理研究

Study on Gas Management Technique in First Mined Protective Seam of Strong Outburst Coal Seams with High Gas

高瓦斯强突出煤层群条件下,通过首采关键卸压层B10煤层能有效解放全组煤层,使得突出煤层转变为非突出煤层。从工程实践中,总结论证了Y型通风沿空留巷技术和底板巷穿层钻孔立体抽采技术对有效治理上覆B11b煤层和下伏B8煤层瓦斯的重大意义,同时,提出以全资源的理念指导矿井设计,即将各煤层开采以整体考虑,统筹矿井瓦斯治理和采场接替。

When dealing with the strong outburst coal seams with high gas,through mining the key pressure relief layer B10 firstly,the full set coal seam can be effectively librated,thus changing the outburst coal layers into un-outburst ones.Based on practical project,this paper illustrated the great significances of Y-type ventilation gob-side entry retaining technology and three-dimensional gas drainage technology by using layer-through boreholes for the efficient management of the above B11b layer and the beneath B8 layer.Meanwhile,the paper puts forth the all-resources guiding theory for mining design,namely taking all layers of coal into consideration,planning the gas management and the mining field relay in an overall way.