充填采空区技术治理上部采空区N_(2)涌出模型

Controlling N_(2) Emission from Upper Goaf by Goaf Filling Technology

针对国家能源集团神东煤炭集团公司榆家梁煤矿42218、42219采空区N2向43202工作面大量涌出的问题,导致43202隅角N2浓度偏高、O_(2)浓度较低。榆家梁煤矿技术人员利用充填采空区的方法,减少漏风,防止采空区N_(2)涌出,通过在52211工作面采用跳采方法,对采空区有害气体浓度分析得知,工作面隅角N2浓度明显降低、O_(2)浓度升高,有效解决了上部采空区N2等有害气体向工作面涌出导致隅角低氧的问题。因此,采用充填采空区方法对上部采空区N2涌出及本采空区有害气体治理具有重要意义。

This article aims to solve the problem of massive N_(2) emission from goafs 42218 and 42219 to working face 43202 in Yujialiang Coal Mine of CHN Energy Shengdong Coal Group,resulting in high N_(2) concentration and low O_(2) concentration in corners of working face 43202.The technicians in Yujialiang Coal Mine have adopted the method of goaf filling to reduce air leakage and prevent N_(2) emission from the goaf.Through the use of skipping mining method for working face 52211,the concentration of harmful gases in the goaf has been analyzed.The results show that the concentration of N_(2) in the corners of the working face is significantly reduced and the concentration of O_(2) is increased.The problem of low oxygen in the corners of the working face caused by N_(2) and other harmful gases from the upper goaf is effectively solved.There⁃fore,the goaf filling method is of great significance for the control of both N_(2) emission from the upper goaf and harmful gases in this goaf.