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Pre-grouting reinforced supporting structure for lower coal seam roadway roof
KAN JIAGUANG, ZHANG SHENG, REN HONGCHAO, CUI GUANGZHEN, ZHANG HUARONG, LI AORAN, WANG XINJIE, YANG LIN, LIU HONGBO
Year of Publication 23.08.2024
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Year of Publication 23.08.2024
Patent
Method and system for grouting reinforcement of gas extraction hole under extremely soft coal seam and application
ZHANG LIBO, CHEN SHAOJIE, LIU RUI, YIN DAWEI, FENG FAN, LI XUELONG, LIU QI, JIANG NING, WANG FENG
Year of Publication 12.02.2021
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Year of Publication 12.02.2021
Patent