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为有效解决急倾斜特厚煤层放顶煤开采硫化氢超限的技术难题,综合分析了硫化氢的涌出影响因素,并进行合理有效的控制,降低硫化氢对人体的危害。主要对采煤机割煤速度、放顶煤强度以及采煤机截割顶/底煤及移动刮板输送机工序对硫化氢涌出浓度影响进行研究,得出硫化氢涌出量随割煤速度、放煤强度增加而增多的规律。通过采取喷洒吸收液吸收硫化氢的治理手段,使工作面司机处、上隅角、回风巷涌出硫化氢的降低效率达到84.4%以上,硫化氢灾害防治取得了突破性的成果。
In order to effectively solve the technical problem of over-limit of hydrogen sulfide in top coal caving mining in steep-inclined and special thick seam, the influencing factors of the emission of hydrogen sulfide are comprehensively analyzed and the reasonable and effective control is put forward to reduce the harm of hydrogen sulfide to the human body. Mainly on the cutting speed of coal shearer, the strength of caving coal and shearer cutting top / bottom coal and mobile scraper conveyor process on the impact of the concentration of hydrogen sulfide emission, concluded that the emission of hydrogen sulfide with coal Speed, increase the intensity of coal and increase the law. By adopting the means of absorbing hydrogen sulfide by spraying the absorption liquid, the reduction efficiency of the hydrogen sulfide discharged from the chamfering face, the upper corner and the return air lane reaches more than 84.4%, and the hydrogen sulfide disaster prevention and control has achieved breakthrough results.