煤层顶板砂岩水定向钻孔预疏放效果检验

煤矿井下定向钻进技术具有钻孔轨迹可精确控制、有效距离长、一孔多用等优点。针对唐家会矿顶板水害,采用定向长钻孔进行预疏放,通过首采工作面的疏放水实践以及穿层钻孔检验,顶板水疏放效果明显,为工作面掘进和回采提供了安全保障。

Drainage Effect Test of Directional Drilling Construction for Coal Seam Roof Sandstone Water Pre-drainage

Directional drilling technology in coal mine has lots of advantages such as precisely controlled drilling trajectory, long effective distance and one hole for multiple purposes. For the roof flood in Tangjiahui mine, pre-drainage was carried out with long directional borehole, by the drainage practice in the first coal mining face and the inspection by boring through seam, obvious drainage effect is presented, which provide safety guarantee for working face tunneling and actual mining.