Study On Hydrogen Sulfide Treatment By Injecting Lye Into Coal In XiaoZhuang Coal Mine

Hydrogen sulfide is a kind of harmful gas in coal mines,Some shallow mines are unusual However,some mines are rich in hydrogen sulfide gas in coal seams due to deep burial and severe geological activities during coal formation,A larme amount of gushing out during mine mining has caused serious obstacles to normal production activities and caused great harm to workers' bodies.With the expansion of coal mining scope and the inreasing depth of mining,the abnormal underground hydrogen sulfide is more and more present in mines that have been proven or are being minedThis paper studies the feasibility of using coal seam injection method to control the hydrogen sulfide flooding of 4#coal in Xiaozhuang Mile from the perspectives of genesis and evolution theory,coal seam physical property measurement and numerical simulation.The research is mainy carried out from the following aspects:by analyzing the coal-forming environment stratum and thermal evolution of Xiaozhuang Mine,the origin and source of hydrogen sulfide in Xiaozhuang Coal Seam are preliminarily identified,The results show that the main cause of hydroen sulfide in Xiaozhuang Mine 4#coal Because of the biological sulfate reduction;a method for determining hydrogen sulfide in coal seam based on the determination of PH value and coalbed methane content is proposed,The hydrogen sulfide content of 4#coal ton coal in Xiaozhuang Mine is 5.63×10-3m3/t to 8.37×10-3m3/t;According to the national standard for determining the water injection.capacity of coal seam,the physical property parameters of coal seam of 4#coal seam were measured,The results show that the 4#coal seam has good water injection;the 4#coal seam of Xiaozhuang Mine is established,In addition to the mathematical and physical models of hydrogen sulfide injection,the flow and diffusion of sodium bicarbonate solution during the injection process and the thermal effects of the chemical reactions accompanying the process and the sulfur removal effect in the coal seam were simulated in the COMSOL Multiphysics numerical simulation software,Contrasting and analyzing the advantages and disadvantages of 5m and 10m drill injection,determined a more reasonable injection drill spacing;based on theoretical analysis and numerical simulation,studied the lye injection drilling parameters and lye injection parameters of 4#coal seam.This paper provides strong support for the technical parameters and field practice of the disaster management of hydrogen sulfide emission in Xiaozhuang mine,and has guiding significance for the judgment and management of the disaster.