摘要
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,阐述了硫化氢超限对人体健康和设备的危害,介绍了放顶煤开采时硫化氢的涌出规律,着重研究了采煤机割煤速度、放顶煤强度以及采煤机截割顶/底煤及拉溜工序对硫化氢涌出规律的影响,结果表明硫化氢涌出强度随采煤机割煤速度、放煤强度的增加而增多。通过对比分析采用喷洒吸收液和超前预注吸收液等技术措施有效解决了工作面上隅角、回风巷硫化氢超限的难题。在工作面回采过程中,工作面采煤机处硫化氢浓度由77×10-6降至12×10-6;前刮板机上方硫化氢由470×10-6降至62.6×10-6;回风巷硫化氢浓度由110×10-6降至15×10-6,硫化氢灾害治理效果显著,降低了硫化氢气体对人体健康及设备的危害;通过综合协调治理,硫化氢灾害治理技术取得了较大突破。
To solve the hydrogen sulfide overrun in top coal caving of steep and extra-thick seam,the paper described hazards of hydrogen sulfide overrun on human health and equipment,introduced emission law of hydrogen sulfide in top coal caving,focused on the influence on emission law of hydrogen sulfide,including coal shearer cutting speed,coal caving intensity,top coal and bottom coal cutting,and scraper advancing. The results indicate that,the hydrogen sulfide emission rises with the increasing coal shearer cutting speed and caving intensity. According to comparative analysis,absorption liquid spraying and advance pre-injection of absorbing liquid and other technical measures were applied to control the hydrogen sulfide overrun in upper corner,return airway. Hydrogen sulfide concentration in working face mining decreased from 77 ppm to 12 ppm,from 470 ppm to 62. 6ppm in upper space of front scraper,from 110 ppm to 15 ppm in return airway. The hydrogen sulfide treatment achieved significant effect preventing gas hazards to human health and equipment; through comprehensive coordinated management,breakthrough was made in hydrogen sulfide disaster control technology.
出处
《煤炭工程》
北大核心
2017年第1期56-59,共4页
Coal Engineering
关键词
急倾斜煤层
特厚煤层
放顶煤
涌出规律
硫化氢治理
steep coal seam
extra-thick coal seam
top coal caving
emission law
hydrogen sulfide governance
