采空区注氮的数值模拟

Numerical Simulation of Nitrogen Injection in Goaf

为解决某煤矿综采工作面采空区遗煤自燃问题,以该煤矿综采工作面为参照建立几何模型,模拟采空区注氮防灭火结果,并将模拟结果与实测结果进行对比。结果显示:模拟所得的采空区氧化带的范围与实际测量所得结果基本一致。通过比较注氮前后采空区氧化带的范围变化,得出向采空区注氮可以有效地减小采空区氧化带的范围,可以有效地抑制采空区遗煤的自燃,数值模拟结果具有一定的参考价值。

To solve the problem of coal spontaneous combustion in the goal of a coal mine. A geometricmodel is established based on a coal mine fully mechanized working face, to simulate nitrogen injectionand fire prevention in the goal and the simulation results are compared with the measured results. Theresults show that simulation of the goal of the oxidation zone range was consistent with the the result offield measurement. Through the nitrogen injection can effectively reduce the range of oxidation zone ofmined-out area, that is greatly reduce the scope of traces of goal coal spontaneous. So the effect of thenitrogen injection is obvious and numerical simulation results have some reference value.