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Keyword [protected layer]
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1. Study On Gas Migration Of Protected Layer Law And Protection Scope Of Xieyi Mine
2. Experimental Study On The Evolution Law Of Permeability Of Protected Layer In Mining
3. Study On The Influence Of Double-Section Coal Pillars Left Behind By The Short-Distance Protective Layer On The Protection Range Of The Protected Layer
4. Research And Application Of Roadway Support Technology For Upward Mining Of Protected Seam In Close Distance Coal Seam
5. Study On The Stress Fracture-Seepage-Law Of Coal In The Protected Layer In The Mining Of The Upper Protective Layer
6. Study On The Influence Of Coal Column Left In The Protective Layer On The Recovery Of The Protected Layer At Close Range
7. Research On The Evolution Law Of Surrounding Rock Cracks In The Protected Layer Mining Tunnel During Close-range Coal Seam Group Minin
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