高瓦斯松软薄煤层瓦斯治理技术研究

Study on Gas Control Technology in Soft and Thin Seam with High Gas Content

高瓦斯松软薄煤层瓦斯治理难题一直困扰着煤矿安全生产,本煤层钻孔瓦斯预抽是解决该问题的有效措施之一。针对山西某矿高瓦斯松软薄煤层赋存特点,通过本煤层钻孔合理封孔深度及打钻施工工艺研究,确定了预抽钻孔合理封孔深度为18 m,最优打钻施工工艺为风动定向钻,将本煤层钻孔瓦斯预抽浓度提升至52%以上,提高了本煤层瓦斯治理效果,为其他相似赋存条件煤层瓦斯治理提供借鉴。

The problem of gas control in soft and thin seam with high gas content has been puzzling the safety production of coal mine,and the pre-drainage of borehole gas in this seam is one of the effective measures to solve this problem.According to the occurrence characteristics of soft and thin coal seam with high gas content in a mine in Shanxi,studies the reasonable hole sealing depth and drilling construction technology of this coal seam,and determines that the reasonable hole sealing depth of predrainage drilling is 18 m,and the optimal drilling construction technology is pneumatic directional drilling,which improves the gas pre-drainage concentration of this coal seam to more than 52%,improves the gas control effect of this coal seam,and provides reference for gas control of other coal seams with similar occurrence conditions.