Causes of Spontaneous Combustion of Coal and Its Prevention Technology in The Tunnel Fall of Ground of Extra-thick Coal Seam
On the basis of the four factors of spontaneous combustion of coal, the causes of such combustion in the tunnel fall of ground were comprehensively analyzed. The causes include the generation of float coal, influence of hot wind pressure on the laneway, and airflow dynamic pressure caused by sloping roadways. According to the characteristics of a fire that occurred in the intake airflow roadway of working face 12190 in the Geng Cun Coal Mine, a three-phase foam composed of mud, nitrogen, and water was used to extinguish the fire. The foam was injected into the fire zone through boreholes on the tunnel roof. Given the precise scheme and reliability of the technology, the fire was successfully extinguished. The specific technological process and parameters of the technology are discussed in detail. It is concluded that the three-phase foam is useful in preventing spontaneous combustion of coal in the tunnel fall of ground. It serves as a new method for preventing such phenomenon in extra-thick coal seam.
Spontaneous combustion of coal tunnel fall of ground three-phase Foam application
Ren Wan-xing Kang Zeng-hui Wang De-ming
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuz School of Management, China University of Mining & Technology, Xuzhou 221116, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
737-744
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）