顺煤层瓦斯抽放钻孔合理封孔深度研究

Study on Sealing Depth Optimization of Gas Drainage Borehole in Coal Seam

为了确定寺河煤业W33011巷顺煤层抽放钻孔合理封孔深度,提高钻孔封孔质量,基于矿井地质条件,通过FLAC^(3D)数值模拟软件对巷道开挖后周围煤岩体应力分布、裂隙发育进行数值模拟,采用YFZ3型瓦斯抽放钻孔封孔质量检测仪对钻孔的封孔质量和漏气位置进行测定,进而确定试验区抽放钻孔合理封孔深度为14 m,有效改善了该区域瓦斯抽放效果。

In order to determine the reasonable sealing depth of the drainage borehole in the coal seam along lane W33011 of Sihe Coal Mine and improve sealing quality, based on the mine geological conditions, FLAC3D numerical simulation software is used to simulate the stress distribution and fracture development of coal body around the roadway after the roadway excavation, and YFZ3 hole sealing quality detector is used to detect the hole sealing quality and leakage position, and determine that the reasonable drilling depth in the test area is 14 m, which effectively improves the gas drainage effect.