上向长距离穿层钻孔薄煤层群联合测压技术应用分析

Application of combined pressure measurement technology in thin coal seam group by long distance boreholes

煤层瓦斯压力是煤矿瓦斯防治工作中的重要基础参数。神隆煤矿9~#煤层和10~#煤层平均间距仅1.27 m,局部地方0.5 m甚至合层,单独测压难度大,采用单独测压和联合测压相结合的方法。经现场试验,10~#煤层的单独瓦斯压力为1.8 MPa,9~#、10#煤层的联合瓦斯压力为2.2 MPa,由于9~#、10~#煤层联合开采,联合瓦斯压力可以用于开采时的瓦斯压力应用工程实践。

Coal seam gas pressure is one of the basic parameter on gas control in coal mine.In Shenlong coal mine,the average spacing between No.9 coal seam and No.10 coal seam is only 1.27 m,and it is difficult to measure the gas pressure separately.So the methods of separate pressure measurement and combined pressure measurement were used.By the field test,the gas pressure of No.10 coal seam is 1.8 MPa by using separate pressure measurement,and the gas pressure of No.9 coal seam and No.10 coal seam is 2.2 MPa by using combined pressure measurement.Due to the combined mining of No.9 coal seam and No.10 coal seam,the joint gas pressure can be used as gas pressure of engineering practice.