School of Safety Engineering,China University of Mining & Technology MOE Key Lab of Mine Gas and Fire Prevention and Control,China University of Mining &Technology

为了能缩短现场瓦斯压力测定时间,探讨了被动式测压方法,从理论上分析了测压钻孔半径与入煤深度对瓦斯压力测定所需时间的影响,并建立计算模型,推导出了瓦斯压力测定稳定时间的计算公式,结果表明:煤层瓦斯压力测定稳定时间与测压钻孔半径的4/3次方成正比,与测压钻孔入煤深度的2/3次方成正比。现场试验表明:在相同的钻孔暴露时间下,钻孔半径与入煤深度越小,瓦斯压力测定时间越少,且瓦斯压力测定结果越大。同时也表明了理论公式的可行性,这为煤层瓦斯压力的快速测定提供了重要的参考依据。

in order to reduce the time required to measure the gaspressure at the ste,the paper discussed the passive mode pressure measured method.The theoretically analyzed the radius of the pressure measured borehole and the depth in coal af cted to the time reured to measure the gas pressure Acalculation model wa.esablis hed and a tormula was derived tocalcuate the measurig stable timeof the gasprssure. Theresuts showed tht the measuring stabl time of the seam gas pressure would be directly proprtional to 4 / 3 power of the pressure measuring borehole radius and would be diesctly proortihnal t 2 3 pover of the depth in the coaof the pressure measured borehole.The stie testresults showed that under the same borehole expose time, the smale of the borehole radius and the deth in co l,theless measuring time of the gas pressure woud be and the higherof the gas pressure measuredresuts would be .Mfeanwhile,the fe astilit of the theoreical fomu a wasexpressed and thus could provide the important reference basis to the rapid measurement of the seam gas pressure.

江苏省自然科学基金基础研究计划资助项目(BK20150180)；江苏省普通高校研究生科研创新计划资助项目(KYLX15_1431)；