Comprehensive method of gas reserves in effective radius of extraction borehole
In this paper,through in-depth study of the gas migration law of gas drainage boreholes in Pinggang Coal Mine,the key factors affecting the effective radius are discussed.Through the observation and analysis of borehole extraction parameters,the attenuation coefficient of borehole flow is obtained,and the relationship between extraction time and extraction rate is further discussed.It is found that when the effective influence radius is 1.0～2.5 m,the extraction time is proportional to the extraction rate.When the radius exceeds 2.5 m,the extraction rate decreases with the increase of radius.In addition,the extraction effect under different borehole spacing was investigated through experiments,and the feasibility of the method was verified by measuring the residual gas content.The research results provide an important reference for the management of coal mine gas disasters,which is helpful to optimize the gas extraction scheme and improve the prevention and control effect of gas disasters.It is suggested to further study the mechanism of gas migration,the influence of multiple factors and the introduction of advanced technologies and methods,so as to improve the research level and application effect in the field of coal mine gas disaster control.
extraction drillingeffective influence radiusborehole flow attenuationextraction timeextraction rateresidual gas content
万方数据
维普
