Fuqiang Coal Mine adopts mining full height actual process by adding the length of single prop once has made obvious economic and social benefit.
富强煤矿在回采工作面推广使用单体支柱加长一次采全高回采工艺，取得了明显的经济和社会经济效益。
Fuqiang Coal Mine adopts mining full height actual process by adding the length of single prop once has made obvious economic and social benefit.
富强煤矿在回采工作面推广使用单体支柱加长一次采全高回采工艺，取得了明显的经济和社会经济效益。
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