摘要
为了研究充填采矿法中胶结充填体的水化放热作用,现场实测充填体温度,并对充填体散热的影响及治理进行了研究。研究结果表明:充填采矿法的采掘作业面均依靠局扇供风,因此通风效果直接影响作业面热环境,充填作业完成后3 d内放热量达到最大,此时充填体周围采场气温达28℃以上,应依据降温风速(0.5~1.0 m/s)的要求重新计算需风量;运用Ventsim预测采深为1 456 m时在3种风速下的采场热环境,当独头风量为3 m3/s时属于一级热害矿井,当风量增至6 m3/s和9 m3/s时热害降至一级标准以下,热环境明显改善,且入风为21.4℃、风量为6 m3/s时采场气温会降至27.2℃,因此加大采场有效风量和风速是改善深部热环境的有效措施;充填水化热与采场气温呈正相关,因此应合理安排作业计划,避免在放热量大的充填体周围作业,如需作业应加强通风,人员上岗应进行职业健康检查,合理安排岗位并及时发放降暑饮品,以免出现紧急情况或危险。
In order to study the hydration heat release effect of the cemented backfill body in the filling mining method,the temperature of the cemented backfill body was measured at the site,and the influence and treatment of heat dissipation of the cemented backfill body were studied.The results showed that all the excavation working faces using the filling mining method relied on the local ventilator for air supply,therefore,the ventilation effect directly affected the thermal environment of the working face.The heat release amount reached the maximum value within 3 days after the completion of the filling operation,and the temperature of stope around the cemented backfill body was above 28℃,so the required air volume should be recalculated according to the requirements of the cooling wind speed(0.5-1.0 m/s).Ventsim was used to predict the thermal environment of stope under three wind speeds when the mining depth was 1 456 m,which belonged to the first-level thermal hazard mine when the single-end air volume was 3 m 3/s.When the air volume increased to 6 m3/s and 9 m 3/s,the thermal hazard level dropped below the first-level standard,the thermal environment was significantly improved,and the temperature of stope would drop to 27.2℃when the input air was 21.4℃and the air volume was 6 m 3/s,therefore,increasing the effective air volume and wind speed of the stope was the effective measures to improve the deep thermal environment.The filling hydration heat was positively correlated with the temperature of stope.Therefore,the operation plan should be arranged reasonably to avoid the working around the cemented backfill body with large heat release amount,the ventilation should be enhanced to remove the hydration heat if the work is required,the occupational health check should be carried out during the periods of before the post and on the post for the personnel,the posts should be arranged reasonably,and the heatstroke prevention drinks should be distributed in time to avoid the emergencies or dangers.
作者
魏丁一
杜翠凤
张宏光
徐海月
WEI Dingyi;DU Cuifeng;ZHANG Hongguang;XU Haiyue(Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines.Beijing 100083,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Nanshan Mine Company,Magang(Group)Holding Co.,Ltd.,Maanshan Anhui 243000,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2018年第10期138-143,共6页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51274023)
关键词
胶结充填体
水化热
温度
通风量
热环境
cemented backfill body
hydration heat
temperature
ventilation volume
thermal environment
