上行含水钻孔双测压管测定瓦斯压力试验  

Test of gas pressure measurement by double pressure-measuring tube in upward water-bearing borehole

作　　者：李志强[1] 刘瑞杰[1] Li Zhiqiang;Liu Ruijie(Anyang Dazhong Coal Industry Co.,Ltd.,Anyang 455141,China)

机构地区：[1]安阳大众煤业有限责任公司

出　　处：《能源与环保》2019年第10期25-29,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：针对复杂地质条件下煤层瓦斯压力难以准确测定的问题,对单管测压过程中钻孔的含水情况进行分析,在钻孔呈充水状态或出现塌孔时,采用剔除水压的测压方式难以准确测定瓦斯压力。基于此,设计出高低位双测压管测压技术及采用“两堵一注”的快速封孔方式,并在大众煤矿进行现场试验,经过现场试验结果得出:该技术可有效控制和降低封孔后孔内通过导水裂隙或水泥砂浆浆液析出积水对压力测定的影响,可以准确测定煤层瓦斯压力值。Aiming at the problem that it was difficult to accurately measure the gas pressure in coal seam under complex geological conditions,the water content of boreholes in the process of single-pipe pressure measurement was analyzed.When the boreholes were filled with water or collapse,it was difficult to accurately measure the gas pressure by using the pressure measurement method of eliminating water pressure.Based on this,the high-low double piezometric pipe pressure measurement technology and the fast hole sealing method of "two plugging and one injection" were designed,and the field test was carried out in Dazhong Coal Mine.The field test results showed that the technology can effectively control and reduce the influence of the water flowing out through the water conducting crack or cement sand slurry in the hole after the hole sealing on the pressure measurement,and can accurately measure the gas pressure value of the coal seam.

关 键 词：上行钻孔 瓦斯压力 双测压管测压 快速封孔 含水量 

分 类 号：TD712[矿业工程—矿井通风与安全]