而矿井巷道就是受限空间的一个典型代表。
And the coal mine laneway is a typical representation of the confined space.
为此方案下井巷工程的是否建设提供理论依据。
Under this program, it is the construction of underground works and provide a theoretical basis.
已完工的井巷，在交工前应负责保管，并清理好场地；
Clear up sites and be responsible for the custody of completed shaft;
随着开采深度的增加，深井巷道围岩的稳定性也发生了变化。
With mining depth increase the country rock stability has also a change.
随着开采深度的增加，深井巷道围岩的稳定性也发生了变化。
With mining depth increase the country rock stability has also a change.
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