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通过分析松软煤层瓦斯预抽钻孔施工常用的几种钻进技术原理及优缺点,针对义煤集团某矿煤层赋存不稳定,本煤层瓦斯抽放孔钻进难度大,钻孔深度浅、卡钻严重、喷孔等实际问题,选择不同型号钻机、不同钻具及工艺进行现场试验,初步形成了一套适用于该矿松软突出不稳定煤层快速成孔技术与装备,对其他矿区同类煤层钻进具有借鉴意义。
By analyzing several common drilling technology principles and their advantages and disadvantages of gas pre-pumping borehole construction in soft coal seam, aiming at the instability of the coal seam of a coal mine in Yi Coal Group, it is difficult to drill the gas drainage holes in this coal seam, Card drill serious, spray holes and other practical problems, choose different types of rigs, different drilling tools and processes for field trials, initially formed a set of applicable to the mine soft and unstable unstable rapid formation of coal into holes technology and equipment, similar to other coal seams Drilling with reference.