With the increase of mining depth, the underground heat harm becomes more serious. Especially for deep shaft conditions, the temperature lowering has become a very important content in safety work.
随着矿井开采深度的增加，井下的热害日趋严重，尤其对于深井条件下，降温工作就成了安全工作极为重要的内容。
The change in the development system can have great impact on the mining, safety, mine look and economic benefit of the production shaft.
开拓系统的变更对生产矿井的开采、安全、矿井面貌和经济效益将产生重大的影响。
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