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Study on the Law of Spontaneous Combustion in Goaf and Relationship between It and Mine Pressure under Easily Spontaneous Combustion Extremely Thick Coal Seam

Author: JiangDongJie
Tutor: LiDongYin；LiHuaMin
School: Henan Polytechnic University
Course: Mining engineering
Keywords: Thick Coal Seam Caving mining Spontaneous Combustion Laws Strata behavior regularity of Numerical Simulation
CLC: TD752
Type: Master's thesis
Year: 2011
Downloads: 89
Quote: 0
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Abstract


Not even ditch coal mining liable to spontaneous combustion extra-thick coal seam depth of about 200m coal seam spontaneous combustion stage 12 days in Gobs in order to grasp the coal seam spontaneous combustion characteristics , the relationship between the law of spontaneous combustion of coal and rock pressure , the use of laboratory experiments , field measurement, theoretical analysis means that the combination of numerical simulation studies . beam tube monitoring goaf gas distribution , and use of computational fluid dynamics software simulation of goaf air leakage situation and changes in oxygen concentration , and thus a clear division Gob three zones , drawn Gob a dangerous regional distribution of the the goaf central oxidation zone close to the face , both ends away from the face , and to determine the inhibition in Gobs in spontaneous combustion of coal and Safety Promotion speed master ; through field measurement the initial Face pressure phase and normal recovery stage pressure law of mine , and on critical layer theory the roof cross backward roof to form a short masonry beams \working face pressure strength , step away from the main reason for the sinking of the steps of the small surface ; the use of RFPA2D numerical simulation of a Stope rock bearing pressure goaf backplane force status basis , goaf the pressure cross three districts divided ; roof sliding instability features based on analysis of the flow characteristics and permeability characteristics of the wind flow in the goaf porous media , and calculate the expansion coefficient and permeability coefficient of goaf coal blocks broken ; comparative analysis of the different inter- drop feature case goaf spontaneous combustion distribution of three zones of goaf pressure in the of early mining normal recovery stage roof cross the distribution pattern of the three districts , obtained the correspondence between the two ; established key layer breaking impact goaf collapse Dagan model analysis of the goaf CO emission law face pressure relationship between law .

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