水道的连接应衬有密封垫片。所有连接面都不应有应力。

Use sealed gasket in the water path. There isn't stress on all link surface.

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刚开始加载时，最大应力集中在搭接面以下的一个三角形区域内。

At the beginning of loading, the major principal stress centralize in a triangle area under the lap.

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而随着矿井采掘深度不断加大，其直接面临的“三高”问题，即高水压、高瓦斯、高地应力问题日益突显。

It is straightly faced with the high water pressure, the high gas and stress along with the mining depth increasing continuously, which is increasingly outstanding.

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