CAJ | 학술논문

在高瓦斯自燃煤层采空区采取高抽加尾巷排放瓦斯的立体抽放方式时，为避免采空区发生自燃，对采空区进行注N2防火．以华晋焦煤有限责任公司沙曲矿15201工作面为例，在确定采空区自燃三带划分标准的基础上，通过埋管测试方法，研究采空区注N2前后采空区N2和O2分布状态，以及采空区N2运移规律．结果表明，注N2后，注入N2与采空区原有气体混合，气体在采空区漏风压与注N2压力共同作用下运移．N2影响区内O2体积分数下降，氧化带范围缩小，降低了工作面自燃的危险程度．为工作面优化注N2参数和提高注N2防灭火效果提供了参考．
재고와사자연매층채공구채취고추가미항배방와사적입체추방방식시，위피면채공구발생자연，대채공구진행주N2방화．이화진초매유한책임공사사곡광15201공작면위례，재학정채공구자연삼대화분표준적기출상，통과매관측시방법，연구채공구주N2전후채공구N2화O2분포상태，이급채공구N2운이규률．결과표명，주N2후，주입N2여채공구원유기체혼합，기체재채공구루풍압여주N2압력공동작용하운이．N2영향구내O2체적분수하강，양화대범위축소，강저료공작면자연적위험정도．위공작면우화주N2삼수화제고주N2방멸화효과제공료삼고．
In order to avoid coal spontaneous combustion occurred in the goaf, it is necessary to infuse nitrogen into the goaf when the tridimensional drainage manner, which includes an exalted and rear laneway, is used to the high-methane and spontaneous combustion coal seam goaf. As an example of 15201 working-face in Shaqu coalmine of Huajin coking coal Co. Ltd. , based on the confirmation of compartmentalization criterion of goaf spontaneous combustion three-zone and by means of a pipe-burying test method, the goaf nitrogen and oxygen distribution characteristic before and after nitrogen-infusing and nitrogen movement law have been investigated. It is indicated that the nitrogen mixes with goaf original gases after nitrogen-infusing, and the mixed gas moves together with the actions of air leak pressure and nitrogen-infusing pressure in the goaf. As oxygen concentration descend in the area influenced by nitrogen, the oxidation zone scope and the fatalness of coal spontaneous combustion in goaf have been reduced. It can provide reference bases for the optimization of nitrogen-infusing parameters and enhancing the effect of nitrogen-infusing fireproofing in other working-faces.