上行超长钻孔测定煤层瓦斯压力技术研究

Research on the technology of measuring gas pressure in coal seam using the upturned and Long-Distance Condition

该文针对在上行超长钻孔快速测压过程中,常规方法存在钻孔长度长、形成的空隙多、易受岩层水影响等技术难题,提出了先采用注浆封孔仪预处理钻孔,然后采用封孔测压仪进行快速测压的封孔方法。然后将新的测压方法与传统方法同时应用于贵州某矿M18煤层的瓦斯压力测定,通过对比发现,新的测压方法相对于传统测压方法在准确性上具有一定的优势。

In this paper, aiming at the technical problems, such as the drill hole is long, has much pore, and is easy to be influenced by the rock water using the conventional method, the paper put forward the first use of the grouting sealing hole to pre-process the drilling hole, and then use sealing hole pressure measuring instrument for rapid pressure seal hole. Then the new method and the traditional method are applied to the gas pressure measuring in the M18 coal seam in Guizhou province. By comparison, the new method has some advantages over the traditional methods in accuracy.