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															Risk Analysis of Roof Accident in Coal Mine Based on Improved Analytic Hierarchy Process and Catastrophe Theory
														[J]. Coal Engineering, 2020, 52(3): 172-176. | 
																																																																																
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															Application of Joint Grouting Reinforcement Technology in the End Mining Project of Large Mining Height Working Face
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															APPLICATION OF HYDRAULIC FRACTURING TECHNOLOGY IN HARD AND STABLE ROOF IN COAL MINE
														[J]. COAL ENGINEERING, 2019, 51(4): 54-57. | 
																																																																																
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															Based on PPV Safety Criteria of Weakening Roof Blasting Parameter Optimization Design
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															The technology research on collapse area in mining face with steeply inclined, weak and outburst coal Seam
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															The Study on the Mechanism and Prevention of Large Crushing in Fully Mechanized Working Face of Extremely Thick Coal Seam
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