浅埋深工作面自燃“三带”分布规律及防治研究  

Distribution and Prevention of Spontaneous Combustion “Three Zones” in Shallow Buried Deep Working Face

作　　者：陈伟崇 吴筱 聂伟雄 王宁[2] CHEN Weichong;WU Xiao;NIE Weixiong;WANG Ning(Production Technology Department,Yulin Shenhua Energy Co.,Ltd.,Yulin 719000,China;Shigetai Coal Mine,Shenhua Shendong Coal Group Co.,Ltd.,Yulin 719315,China)

机构地区：[1]榆林神华能源有限责任公司生产技术部,陕西榆林719000 [2]神华神东煤炭集团石圪台矿,陕西榆林719315

出　　处：《煤矿安全》2018年第11期128-131,共4页Safety in Coal Mines

摘　　要：以青龙寺煤矿浅埋深5-20101工作面为背景,采用理论研究和现场实测对其采空区"三带"分布规律进行研究,研究结果表明:在工作面开采后,根据采空区内压力分布情况,将采空区垮落带划分为自然堆积区、破碎堆积区和重新压实区,这三区与采空区自燃"三带"存在基本对应关系。根据采空区"三带"测试结果,得出当工作面最小安全推采速度为9.5 m/d。在工作面回采过程中,可采用注浆防灭火、注氮防灭火、堵漏防灭火和喷洒阻化剂等防灭火技术措施,减少向采空区内漏风量,降低采空区遗煤周围氧气浓度,进而保证工作面安全回采。Taking the shallow buried depth 5-20101 working face in Qinglongsi Coal Mine as the background, the theoretical research and field measurement are used to study the distribution of ＂three zones＂in goaf. The results show that, after coal mining, according to the distribution of pressure in the goaf, the goaf caving zone is divided into natural accumulation zone,crushing accumulation zone and recompaction zone, and there is a basic correspondence between these three zones and the three zones of goaf spontaneous combustion. According to the test results of＂three belts＂in goaf, it is concluded that the minimum safe mining speed of working face is 9.5 m/d. In the mining process of working face, anti-fire measures such as grouting fire prevention, nitrogen-injection fire prevention, air leakage fire prevention and extinguishing, and spraying blocking agent can be adopted to reduce air leakage in the goaf and oxygen concentration around the goaf, so as to guarantee safe mining of working face.

关 键 词：浅埋深 煤层自燃 采空区 数值模拟 “三带”分布 

分 类 号：TD752.2[矿业工程—矿井通风与安全]