By reasonable pouring, mix proportion optimizing, effective temperature control and reasonable curing, the concrete quality of spillway tunnel is guaranteed and no crack found.

通过合理选择浇筑措施、优选配合比、有效的温度控制以及合理的养护，目前，泄洪洞各方面质量均满足要求。且：禾发现裂缝。

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This text introduces the technology of remained tunnel for continuous usage in work-out area in Germany coal mine and corresponding measures of preventing and curing natural disast…

本文介绍了德国煤矿沿空留巷技术及相应的防治自然灾害措施。

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