CAJ | 학술논문

针对煤矿抽放采空区瓦斯和减少漏风防止采空区煤氧化自燃的矛盾，研究了开采过程中采空区瓦斯运移及遗煤氧化自燃规律。采用全面布点的方法测量工作面采空区气体成分和浓度，分析得出瓦斯运移规律和“三带”情况；根据所得数据和分析结果，建立模型并应用FLUENT对采空区瓦斯分布状态和漏风情况进行数值模拟，得到渐变供风量下的可能自燃带范围和瓦斯涌出的变化规律，并据此得到同时满足防止瓦斯浓度超限和煤自燃要求的安全风量。
침대매광추방채공구와사화감소루풍방지채공구매양화자연적모순，연구료개채과정중채공구와사운이급유매양화자연규률。채용전면포점적방법측량공작면채공구기체성분화농도，분석득출와사운이규률화“삼대”정황；근거소득수거화분석결과，건립모형병응용FLUENT대채공구와사분포상태화루풍정황진행수치모의，득도점변공풍량하적가능자연대범위화와사용출적변화규률，병거차득도동시만족방지와사농도초한화매자연요구적안전풍량。
In this paper, study was carried out on the law of gas migration and residual coal spontaneous combustion in gob during coal mining to counter the contradictions between the gas drainage from gob and the air leakage reduction for the prevention of coal spontaneous combustion in gob. The gas composition and concentration in the working face were measured with the method of laying monitoring points along the whole face and the law of gas migration and coal spontaneous combustion and the distribution of “three zones” in the gob were found out by analysis. Based on the field measured data and analysis results, a model was set up and numerical simulation was conducted on the gas distribution and air leakage in the gob with FLUENT software, the variation law of spontaneous combustion zone and gas emission in the state of gradually-changing air supply was obtained and on this basis, the safe air quantity that can simultaneously meet the requirements for preventing disallowed gas concentration and coal spontaneous combustion in the working face was gotten.