高瓦斯煤层群保护层开采卸压效果数值模拟

为合理选择保护层,针对高瓦斯突出煤层群安全开采问题,分析了保护层开采的保护作用机理,即保护层开采可对被保护层起到卸压增透作用,改善被保护层的瓦斯抽放效果是解决煤与瓦斯突出问题及瓦斯灾害的重要技术手段;卸压对煤与瓦斯突出及瓦斯问题的解决具有决定作用.针对某矿高瓦斯突出煤层群生产地质条件,采用FLAC3D数值软件模拟2个非突出煤层作为保护层开采时的卸压效果,并对其进行了分析比较,研究结果可为保护层的合理选择提供参考依据.

Study on numerical simulation of pressure relief effect of protective seam mining in high gas coal seams

In order to select a proper protective seam,firstly,in view of safety mining of high gas coal seams,the protective mechanism of protective seam mining was analyzed.Protective seam mining has pressure relief and a permeability-increasing function to a protected seam,and it can improve gas the drainage effect of a protected seam effectively.Thusly,protective seam mining is an important technique to solve gas disaster problems in high gas coal seams.Pressure relief is the key to solve the coal and gas outburst problems.In view of safe mining in high gas coal seams in a mine,the pressure relief effect of two protective seams mining was studied through FLAC3Dnumerical simulation method,and analysis and comparison have carried out.The results can provide a basis for the reasonable selection of a protective seam.