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随着矿井开采向深部的延伸,被选择作为保护层的煤层瓦斯压力与瓦斯含量逐渐增加,存在着由无突出煤层向突出煤层突然升级的可能。为了保证深部高瓦斯保护层工作面安全回采,给解放突出煤层创造时空条件,需要采取多种有效的瓦斯综合治理措施。结合海孜煤矿的煤层赋存条件和生产实际,根据邻近层与本煤层瓦斯涌出的特点,在Ⅱ1024工作面针对性的采取了地面钻孔、远距离穿层钻孔、顺层钻孔、高位钻孔、斜交孔、老空区埋管、高抽巷和水平孔全方位立体交叉综合抽放手段,有效的控制了保护层工作的瓦斯涌出,为深部高瓦斯工作面的安全高效开采奠定了基础。
With the extension of mining to the deep, the gas pressure and gas content of the coal seam selected as the protective layer gradually increase, and there is a possibility that the sudden outburst of the non-protruding seam to the protruding seam may occur. In order to ensure the safe mining of the working face of the deep gassy protective layer and to create the space-time conditions for the liberation of the prominent coal seams, a variety of effective gas comprehensive treatment measures need to be taken. According to the occurrence conditions of coal seams in Haizi coal mine and the actual production, based on the characteristics of gas emission from the adjacent layers and the coal seam, ground drilling, long distance borehole drilling, High-level drilling, oblique hole, buried pipe in the old area, high-pumping tunnel and horizontal hole comprehensive three-dimensional cross-drainage means to effectively control the protective layer of gas emission, for the safe operation of high-gas face Mining laid the foundation.