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。
With the increasing of the mining depth, the potential safety hazard is outstanding day by day, the incident happens occasionally.
随着煤矿开采深度的增加，安全隐患日益突出，安全事故时有发生。
With the increase of mining depth, pre-mining rock stresses increase dramatically, which leads to the rise of the frequency of rock burst occurrence and the drop of mine safety.
随着矿山开采深度的增加，原岩应力水平大大提高，导致岩爆等灾害发生频率提高，矿山生产的安全性下降。
With the mining depth increase in Yaoqiao Coal mine in Datun mine area, various nonlinear mechanics damages are appeared, which can seriously affect the safety production.
大屯矿区姚桥煤矿进入深部开采后，出现各类非线性力学破坏现象，严重影响巷道的正常使用。
With the mining depth increase in Yaoqiao Coal mine in Datun mine area, various nonlinear mechanics damages are appeared, which can seriously affect the safety production.
大屯矿区姚桥煤矿进入深部开采后，出现各类非线性力学破坏现象，严重影响巷道的正常使用。
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