信宜市银岩锡矿因前期大量的无序开采，形成了大面积不规则采空区，严重威胁着矿山投产后的生产安全。
Due to the disorder exploration of Xinyi Yinyan Tin mine in early stage, huge irregular mined-out areas were formed which badly threatened the production safety of the mine.
信宜市银岩锡矿因前期大量的无序开采，形成了大面积不规则采空区，严重威胁着矿山投产后的生产安全。
Due to the disorder exploration of Xinyi Yinyan Tin mine in early stage, huge irregular mined-out areas were formed which badly threatened the production safety of the mine.
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