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| Study on causes and preventive measures of collapse column in underground coal mine |
| Yang Hengkun |
| Xinzhi Coal Mine of Shanxi Coking Coal Huozhou Coal Electricity Group Corporation Ltd., Huozhou 031412, China |
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Abstract Based on coal mining work was easily broke down and underground water inrush accident was easily caused by collapse column in underground coal mine, which threatened personal and property security seriously, causes of collapse column in underground coal mine were analyzed and relevant precautionary measures were summarized.
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