塔山煤矿大直径L型高位钻孔抽放瓦斯技术研究  

Study on Gas Drainage Technology of Large Diameter L-type High-position Borehole in Tashan Coal Mine

作　　者：李维友 Li Wei-you(Ventilation Department of Datong Coal Mine Group Co., Ltd., Shanxi Datong 037000)

机构地区：[1]大同煤矿集团有限责任公司通风处

出　　处：《山东煤炭科技》2019年第10期68-69,77,共3页Shandong Coal Science and Technology

摘　　要：为保证8301工作面高强度开采下的瓦斯有效治理,将工作面的通风系统调整为“两进一回”,利用大直径L型高位定向钻孔抽放采空区瓦斯,通过计算,高位钻孔的垂直位置为煤层顶板15m,水平方向距回风巷10~50m。高位定向钻孔瓦斯抽放期间,8301工作面抽排瓦斯纯量为工作面绝对瓦斯涌出总量的36.2%,因瓦斯超限造成工作面停产现象得以控制。In order to ensure effective gas control under high-intensity mining in 8301 working face, the ventilation system of working face is adjusted to "two-in and one-back", and the gas in goaf is drained by large-diameter L-shaped high-level directional drilling hole. Through calculation, the vertical position of high-level drilling hole is 15m above the coal seam roof, and the horizontal direction is 10~50m away from the return air lane. During the period of gas drainage by high directional boreholes, the gas drainage purity of 8301 working face is 36.2% of the total absolute gas emission from working face, and the production stoppage caused by gas exceeding the limit is controlled.

关 键 词：定向钻孔 大直径 瓦斯抽采 钻孔参数 

分 类 号：TD712.6[矿业工程—矿井通风与安全]