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Keyword [Mining of upper protective layer]
Result: 1 - 4 | Page: 1 of 1
1.
Investigation And Research On Pressure Reduction And Permeability Enhancement And Protective Effect Of Upper Protective Layer Mining On Lower Extra Thick Coal Seam
2.
Study On Safe Mining Technology And Application Of Protective Layer Over Close Coal Seam In Shangliang Mine
3.
Research On Pressure Relief Mechanism And Application Of Repeated Mining Of Upper Protective Layer Of Coal Seam Group
4.
Study On Variation Law Of Floor Stress And Pressure Relief Effect In Mining Of Upper Protective Layer
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