关键词: 综掘工作面, 硫化氢涌出, 预注硫化氢吸收液, 高压喷射, 降低效率

Abstract: Firstly, through field test, this paper analyses the rule of hydrogen sulfide emission and its distribution along the course of cutting coal by road header in fully mechanized driving face, and puts forward the control measures of pre-injection of hydrogen sulfide absorbent liquid to the working face and high pressure injection of hydrogen sulfide absorbent liquid by cutting head with the technology of "three pressure zones". The reasonable technological parameters of the control measures were determined and the control effect was investigated. The concentration of hydrogen sulfide decreased from 269.9 ppm and 151.4 ppm to 27.5 ppm and 17.2 ppm respectively when the road header cut coal at 5m and 15m away from the working face. The reduction efficiency was 89.8% and 88.6%, respectively.