双指标划分易燃厚煤层综放面采空区自燃“三带”
쌍지표화분역연후매층종방면채공구자연“삼대”
Dividing Spontaneous Combustion Thick Coal Seam Fully Mechanized Sub-level Caving Mining Face Goaf Spontaneous Combustion "Three Zones" by Double Indicators
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