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Research on the Characteristics of Spontaneous Combustion and the Application of Prevention and Control Techniques Against Fire in Gobs of the Horizontal Section of Steep Seams

Author: ChenZhen
Tutor: ZuoJianMing
School: Taiyuan University of Technology
Course: Safety Technology and Engineering
Keywords: inclined seam the characteristics of self-ignite stereo fire zone division levels fire fighting technology
CLC: TD752
Type: Master's thesis
Year: 2011
Downloads: 148
Quote: 3
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Abstract


Fire disasters caused by spontaneous combustion are one of the major threats to the safety in production in coal mines. They not only lead to the waste of volumes of high-quality minds, but also have a bad effect on environment and the safety of workers. At the moment, the extraction mines of inclined seams are less in quality and quantity, and aren’t given enough attention. Meanwhile, there isn’t a set of relative and effective technologies in the aspect of prevention and control of mine fire. Due to the geological particularity, the cause and spread of the fire disasters caused by spontaneous combustion in the mines of inclined seams are extremely complex, which would subsequently cause series of difficulties on fire prevention. On the basis of the geological features of steep seams and the mining characteristics of gobs in the horizontal parts of steep seams, this paper sums up the spread trend of spontaneous combustion area in gobs. And according the conclusion, this paper analyzes the difficulties of the prevention and control of spontaneous combustion area in gobs and the available control techniques; puts forward a new integrated control technique against this fire zone, which is put into use to test.Main research contents and results are as follows:1. From the aspect of characteristics of left coal, features of mine pressure behavior, laws of surface subsidence, and laws of air leakage in the horizontal section of steep seams, it analyzes the cause of formation of self-ignite in the horizontal section of steep seams.2. On the basis of the analysis on the causes of the fire disaster attributed to self-ignite in the gob of the horizontal section of steep seams, this paper sums up the characteristics of the spontaneous combustion and shows that this fire zone has the feature of three-dimensional development tendency. At last, it makes a conclusion that this kind of gobs would be a stereo fire zone.3. This paper analyzes the characteristics of the stereo fire zone caused by spontaneous combustion in the gobs of the horizontal parts of steep seams, and sums up the difficulties in the process of prevention and control of fire in this area, such as, uncertain ignition source, the expansion of the surface cracks, the caving of the walls of driving holes, bad results of grouting, and slow process of temperature decrease. And with various ripe fire-fighting theories and technologies, it puts forward a new fire control technology in the stereo fire zone of steep seams for the first time------"integrated prevention and control technique against fire in the horizontal section of stereo fire zone"4. It divides the entire stereo fire zone into three levels creatively, and manages them separately. It elaborates the different measures to different levels of the "integrated fire control technology in horizontal section of stereo fire zone" in detail:water seepage and plugging fissures in the first level; drilling and grouting on the surface and sealing high temperature coals in the second level; injecting gum underground to form a isolation belt in the third level; and injecting nitrogen for extinguishment in all levels.5. In accordance with the "integrated prevention and control technique against fire in the horizontal section of stereo fire zone" and the actual situation of A Daohai which belongs to Baotou mining company, this paper applies the technology into the case of A Daohai to check the feasibility, and gets success.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine fire > Mine Fire
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