WSJ】Rescuers prepared to enter a flooded coal mine where 12 miners have been trapped for days in Guiyang, Guizhou Province, China, Tuesday.

周二，贵州省贵州市，救援人员正准备进入发生透水的煤矿，解救已被围困数天的12名矿工。

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There distributes a great number of karst caves in southwest of Guizhou province and they bring great difficulties to mine construction.

中国黔西南地区溶洞较多，岩溶地区实施矿山工程难度大。

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Upper Permian coal-bearing formation in Xinhua coal-mine is a set of coal-bearing formation of marine carbonate rock and clastic rock in Liuzhi, Guizhou.

贵州六枝特区新华煤矿上二叠统含煤岩系属于一套海陆交互相含煤建造。

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