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Keyword [no coal pillar]
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1. Coal And Metheme Mining Technology In The Condition Of Hard Of Protective Layer And "Y"-Ventilation Type
2. Study Of MS And AE Characteristics In Thick Coal Seam Mining Of Stagger Arrangement With No Coal Pillar
3. Study On Stability Mechanism Of Surrounding Rock Of Roadway Side Filled With Cut Top Broken Block And Complete Technology Of Pillarless Mining
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