长距离、多煤层瓦斯压力测定技术的应用

Application of Gas Pressure Measurement Technology in Long-distance and Multi-coal Seams

针对双柳煤矿在测定下组煤瓦斯压力时,存在与上组煤距离较大,需穿过太原组灰岩含水层,测定的8~#与9(8+9)~#煤层距离较近,测压时相互干扰等问题,采用长距离测压钻孔封孔、近距离煤层测压封孔和封堵含水层测压封孔技术对下组煤8~#与9(8+9)~#煤层进行了瓦斯压力测定,阐述了该技术的原理与测定流程,所测结果符合煤层瓦斯压力梯度的规律和矿井的实际情况。

Gas pressure measurement for lower coal seams has two difficulties in Shuangliu Coal Mine,one is the long distance from the upper group of coal seam which needs to pass through the Taiyuan formation limestone aquifer.The other one is too short distance between coal seam No.8 and No.9 which causes problems of inter-interference during pressure measurement.The borehole drilling and sealing technology is used in long-distance pressure measuring,and borehole drilling and sealing plus aquifer sealing technology is introduced for the gas pressure measurement of lower coal group.Elaborates the principle and measurement process of the technology.The measured results were in comply with the law of coal seam gas pressure gradient and the actual situation of the mine.