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注气置换解吸煤层瓦斯来防治煤与瓦斯突出是一种创新性的瓦斯突出防治新思维,目前正处于初始研究阶段。煤层注气半径是注气钻孔参数设计的最基本技术参数。利用流量法对新景矿煤层低压注气有效半径进行了测定,结果表明在注气压力为0.3 MPa时,注气有效影响半径为0.9 m。
It is an innovative new idea of gas outburst prevention and control that gas-injection displacement and desorption of coal seam gas to prevent coal and gas outburst and is currently in the initial stage of research. Coal seam gas injection radius is the most basic technical parameter of gas injection borehole parameter design. The effective radius of low pressure gas injection in Xinjing coal seam was measured by using the flow method. The results show that the effective radius of gas injection is 0.9 m when the gas injection pressure is 0.3 MPa.