瓦斯压力成长曲线法测定煤层瓦斯压力

Gas pressure growth curve method applied to measurement of seam gas pressure

为了解决在常村矿煤与瓦斯突出矿井中测定瓦斯压力时,由于裂隙较多、封孔不严、测压钻孔漏气导致测得的瓦斯压力测定值偏小的问题,提出了应用瓦斯压力成长曲线的间接方法测量瓦斯压力,同时与直接法测量瓦斯压力作对比分析,并在常村矿进行了工程实践检测。研究结果表明:应用直接法测得的最大煤层瓦斯压力为0.61 MPa,应用瓦斯压力成长曲线的方法测得的煤层瓦斯压力为0.92 MPa,比应用直接法大0.31 MPa,说明应用瓦斯压力成长曲线方法所测得的瓦斯压力更接近真实值,这对保障煤矿安全生产具有重要意义。

In order to solve the problem that the gas pressure measured value was too low caused by many cracks, borehole not fully sealed and the air leakage of the measured borehole during gas pressure measuring period in the coal and gas outburst mine of Changcun Mine, an indirect method of gas pressure growth curve was applied to measure gas pressure. Meanwhile, a comparison analysis was conducted to the gas pressure measured with the direction method,the method was applied to the engineering practice measurement in Changcun Mine. The study results showed that the max seam gas pressure measured with the direction method was 0.61 MPa, the seam gas pressure measured with the gas pressure growth curve method was 0.92 MPa,the pressure measured with gas pressure growth curve method was 0.31 MPa higher than the direction method. The application showed that the gas pressure measured with the gas pressure growth curve method could be more accurate to the actual value and would have important significances to guarantee the mine safety production.