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为回收传统采矿方式中留设的保安煤柱,山西晋煤集团所属某矿154307工作面开展了沿空留巷试验。目前,该试验工作面累计推进780余m,留巷充填780余m,取得初步成效。方圆集团
In order to recover the security pillars left in the traditional mining methods, the 154307 working face of a mine belonging to Shanxi Shanxi Coal Group carried out the gob-side entry test. At present, the experimental work surface has pushed forward a total of more than 780 m and retained more than 780 m of retaining lane to achieve initial results. Fangyuan Group