急倾斜厚煤层瓦斯抽采钻孔布置方式研究

Research of Gas Drainage Borehole Layout of Steeply Inclined Thick Coal Seam

西沟煤矿开采煤层为急倾斜厚煤层,随着开采深度加大,瓦斯涌出量大大增加,为了更好地解决瓦斯超限问题,矿井采用穿层下行钻孔、顺层上行钻孔、顺层下行钻孔等抽放方法对本煤层进行抽采,通过对各种抽放钻孔布置方式的比较,找出最佳的抽放方法,及抽采有效预期时间,为同等地质条件的急倾斜厚煤层瓦斯抽采提供借鉴依据。

The coal seam of Xigou Coal Mine is steeply inclined thick coal seam. With the increase of mining depth, the gas emission increases greatly. In order to solve the overrun of gas better, the coal seam is extracted by using the drainage methods such as of cross-seam downward drilling, bedding upward drilling and bedding downward drilling. The best drainage method and expected time of effective drainage are found out by comparing the various drainage borehole layouts to provide reference and basis for the gas extraction of steeply inclined thick coal seam of the same geological conditions.