Researches of fracture evolution induced by soft rock protective seam mining and an omni-directional stereo pressure-relief gas extraction technical system: a case study

In the absence of a suitable coal seam to serve as the protective seam in deep mining, an innovative solution of using the soft rock seam as the protective seam mining has been put forward. Taking the Luling Coal Mine as the engineering background, theoretical analysis and similar simulation experim...

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