含水煤岩层瓦斯压力测定新技术

针对含水煤岩层瓦斯压力测定成为难题的现状,分析含水煤岩层瓦斯和水压平衡的关系,发现上行孔先排水后排气、下行孔先排气后排水的规律,利用重力学的相关知识,应用把水放出来的设计,发明上行孔煤层瓦斯测压水压剔除仪和下行孔煤层瓦斯测压水压剔除仪。现场试验表明:煤层瓦斯测压水压剔除仪能把测压孔中的水放出来,消除水压对瓦斯压力的影响。

New Technique of Measuring Gas Pressure in Coal and Rock Seam with Water

According to the present situation that measuring gas pressure in coal and rock seam with water is a problem,the equilibrium relation between gas and water in coal and rock seam with water was analyzed,and the law that drainage water goes out before exhaust gas in upward borehole and drainage water goes out after exhaust gas in downward borehole was discovered.By using relevant knowledge of gravitation and applying the design of discharging water,the rejecting water pressure instrument for measuring coal gas pressure in upward borehole and the rejecting water pressure instrument for measuring coal gas pressure in downward borehole were invented.The practical experiment shows that rejecting water pressure instrument could discharge water in borehole,and eliminate the influence of water on gas pressure.