The cause of mine pillar destruction in in Dachang Tongkeng Tin Mine was analyzed from observation by photoelastic stressmeter embedded in mine stope 570.
通过对埋设于570中段光弹性应力计的观测，分析了该中段矿柱破坏的情况及原因。
The cause of mine pillar destruction in in Dachang Tongkeng Tin Mine was analyzed from observation by photoelastic stressmeter embedded in mine stope 570.
通过对埋设于570中段光弹性应力计的观测，分析了该中段矿柱破坏的情况及原因。
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