摘要
随着地下矿开采深度的不断增加,矿井热害问题日益突出,不仅威胁井下作业人员的健康,而且严重影响劳动效率及企业的经济效益。通过对传统制冷工艺的深入研究,在分析以往人工制冷措施利弊的基础上,提出了一种新型的矿井热害防治系统,该系统由2部分组成,分别运用了传热学及热力学的相关原理。第一部分是覆盖在制冷巷道围岩表面的隔热材料,作用是降低围岩热辐射及与制冷系统配合延缓空气升温。第二部分是一套人工制冷系统,是在传统空气压缩制冷循环的基础上合理改进而来。该系统以制冷巷道作为制冷对象,将原有的换热方式改为2股气流的混合,在不影响井下风量和风速的前提下,降低制冷巷道中的风流温度。该系统不仅使制冷效果得以显著提高,而且简化了系统组成,降低了施工及运行管理的技术难度,同时减少了资金投入,节约了生产成本,而且系统安全性也相对更高。
As underground mining depth increases,mine thermal damages have become increasingly prominent.These threaten the health of mine workers,but also seriously affect labor and economic efficiency of the enterprises.Through in-depth study on traditional cooling technology,based on the analysis of the advantages and disadvantages of previous artificial refrigeration measures,a new mine thermal damage control system was presented.The system consists of two parts,which respectively applies the relevant principles of heat transfer and thermodynamics.The first part is the insulation material,which covers the rock surface of cooling tunnel,and its action is to reduce the rock thermal radiation and delay air warming acting with the refrigeration system.The second part is a set of artificial refrigeration system,which makes some reasonable improvements on the traditional air-compression refrigeration cycle.The cooling of the refrigeration system focuses on the cooling tunnel.This new refrigeration system modifies the original heat transfer into mixing of two fluids,which reduces the temperature of the air flow in the cooling tunnel without influencing the underground air volume and velocity.By this method,the cooling effect can be significantly improved,but also the system component is simplified.And the technical difficulties in the construction and operation management are lowered.The system can reduce capital investment,save the cost of production,and highly increase the security of the system.
出处
《金属矿山》
CAS
北大核心
2014年第5期162-165,共4页
Metal Mine
关键词
矿井热害
制冷系统
制冷巷道
隔热材料
Mine thermal damage
Cooling system
Cooling tunnel
Insulation materials
