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Keyword [Released range]
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1. Study On The Released Range Of Adjacent Seams
2. Study On The Released Range And The Critical Interlayer Spacing Of Upper Protective Coal Seam With Closed Distance
3. The Research On Gas Migration Rules And The Released Range About Overlying Adjacent Seams
4. Study On Released Range And Gas Drainage Of Close Lean Upper Protective Layer
5. Study On High Mining-induced Stress Evolution And Effects Of Downward Relieving Mining For Closed Coal Seams
6. Study On The Pressure-relief Gas Extraction Technique Under The Conditions Of Protective Layer Mining
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