基于立方插值法及示踪技术的工作面漏风区域划分研究

Study on Regional Division of Air Leakage of Working Face Based on Cubic Interpolation and Tracer Technology

为了研究超厚煤层放顶煤工作面瓦斯分布规律及采空区瓦斯涌出的特征,采用单元法将采场分为40个测试单元,测试了不同生产环境下采场瓦斯分布特征;运用MATLAB软件提供的立方插值法建立了工作面三维瓦斯浓度分布模型,揭示了工作面瓦斯分布规律;分析了瓦斯涌出来源,提出了利用SF6示踪技术并结合实测架间瓦斯浓度的方法,将工作面风流分为3大区,测试结果表明,工作面1~#~40~#架(70 m)为工作面风流漏入区,40~#~80~#架(96~140 m)为过渡区,80~#~120~#架(140~210 m)为采空区气体漏出区;划定了工作面瓦斯治理的重点区域,为抽采措施最佳抽采范围的确定提供了数据支撑。

To study gas distribution law and goaf emission characteristics of super-thick coal seam caving face,gas distribution characteristics under different production conditions are testedby unit method,which divided the stope into 40 test units,three-dimensional gas concentration distribution model is established with cubic interpolation method provided by MATLAB.The paper revealed the distribution law of gas in working face,analyzed the source of gas emission,proposed the tracer technology method of SF6 and measured gas concentration between frames to divide airflow into three areas.The test results showed that the airflow leakage area of the working face is 1~#to 40~#frames(70 m),the transition area is 40~#(96 m)to 80~#frames(140 m),the gas leakage area is 80~#(140 m)to 120~#frames(210 m).The key areas for gas control are delineated,which provides data support for determining the optimum extraction range of drainage measures.