钻孔瓦斯涌出量确定排放半径影响因素分析

“The detailed regulations of preventing coal and gas ”（hereinafter the detailed regulations）regulates the method of measuring drainage radius using the relative changes of gas emission quantity to determine drainage radius of advancing hole. while during the process of the operation ，serious factors such as drilling construction，the practical conditions of working face，the selection of flow meter effects the method，resulting in the inaccuracy of measurement .In this paper, through the examples of analysis, points out that the gas emission to determine the radius of emission limitations and other methods attempt to accurate determination of emissions from the emission radius drilling, drilling for the design of emissions to provide a basis to enhance the effect of gas emissions.