Technique and experiment of active direct gas pressure measurement in coal roadway  

作　　者：CHEN Xue-xi MA Shang-quan QI Li-ming 

机构地区：[1]School of Safety Engineering, North China Institute of Science and Technology, Beijing 101601, China [2]Institute of Resources and Safety Engineering, China University of Mining and Technology （Beijing）, Beijing 100083, China

出　　处：《Journal of Coal Science & Engineering(China)》2009年第2期210-214,共5页煤炭学报（英文版）

基　　金：Supported by National Basic Research Program of China(2005cb221504);National Key Technologies R & D Program of China(2006BAK03B01)

摘　　要：An active measurement method and its principle was introduced consideringthe low success rate,special difficulty,and long measurement time of the direct gas pressuremeasurement currently used in coal roadways.The technology of drilling,boreholesealing depth,borehole sealing length,sealing control of the measuring process,compensatorycomputation of gas loss quantity and other key techniques were discussed.Finally,based on the latest instrument the authors developed,a series of experiments of directgas pressure measurement in the coal roadways of the Jincheng and Tongchuanmine district,were carried out.The experimental results show that active gas pressuremeasurement technique has advantages as follows:(1) the application scope of direct gaspressure measurement technique is wide and it does not have the restriction of coalhardness,coal seam fissure and other conditions;(2) the measured results are credible,which can be tested by the same gas pressure value acquired from a different borehole inthe same place;(3) the measurement process is convenient and quick,it takes about 2 to3 days to acquire the gas pressure value in a coal seam.An active measurement method and its principle was introduced considering the low success rate, special difficulty, and long measurement time of the direct gas pressure measurement currently used in coal roadways. The technology of drilling, borehole sealing depth, borehole sealing length, sealing control of the measuring process, compensatory computation of gas loss quantity and other key techniques were discussed. Finally, based on the latest instrument the authors developed, a series of experiments of direct gas pressure measurement in the coal roadways of the Jincheng and Tongchuan mine district, were carried out. The experimental results show that active gas pressure measurement technique has advantages as follows： （1） the application scope of direct gas pressure measurement technique is wide and it does not have the restriction of coal hardness, coal seam fissure and other conditions; （2） the measured results are credible, which can be tested by the same gas pressure value acquired from a different borehole in the same place; （3） the measurement process is convenient and quick, it takes about 2 to 3 days to acquire the gas pressure value in a coal seam.

关 键 词：coal roadway active gas pressure measurement method key techniques experimental research 

分 类 号：TB9[一般工业技术—计量学] TQ522.1[机械工程—测试计量技术及仪器]