| According to the gas geological conditions and development and mining methods of Gaohe energy mine field,this paper studies the regional structural characteristics of Gaohe energy,the causes and distribution characteristics of geological structure and tectonic stress field by using the method of data statistical analysis and theoretical analysis.It also analyses the structural step-by-step control characteristics of gas occurrence in Gaohe energy mine field,and studies the influence of geological structure on mine.Based on the comprehensive hypothesis of coal and gas outburst mechanism and gas geology theory,the control effect of Gaohe energy geological structure on coal and gas outburst is analyzed.The main conclusions are as follows:(1)The regional structural characteristics of Gaohe energy source,the genesis and distribution of geological structure in the mine field,and the tectonic stress field are studied,and the structural control law of gas occurrence in No.3 coal seam of Gaohe energy source is obtained step by step.(2)The control effect of geological structure on gas occurrence characteristics and gas content in coal mines is analyzed,and the occurrence law of gas in No.3 coal seam of Gaohe Energy is obtained.Geological structure and coal seam burial depth are the main controlling factors of gas content in No.3 coal seam of Gaohe Energy.With the increase of coal seam burial depth,gas content in West and North coal seam of mine is obviously higher than that in east.Geological structure area is gas enrichment area,and the value of gas content in coal seam near geological structure is obviously increased.(3)The study on the control effect of geological structure on coal and gas outburst shows that different stages of geological structure promote the formation of structural coal in coal seam,control its distribution and development degree in the mine field,and then affect the coal strength,coal seam pore structure,coal seam adsorption-desorption characteristics,gas emission characteristics and local gas occurrence characteristics in the geological structure area.All the characteristics of coal seam in the geological structure area are in favor of the development of outburst.The physical structure change of coal body,local accumulation of gas and variation of physical parameters of coal seam caused by structural development are the necessary conditions for coal and gas outburst.Geological structure controls the occurrence and distribution of coal and gas outburst in coal mines.This paper has 52 figures,12 tables and 76 references. |
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