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《Hebei Coal》 2000-04
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Reinforcement of roof with polyurethane in oxidized pillar in ultru - near alluvion

LU Dian - lin, DING Yan - bin (Xingtai the Mine of Xingtai Mining Group, Xingtai 054026, China)  
Demonstrated are the construction technology of roof reinforcement and mud- sand bursting dealing with polyurthane to realize safely mining of pillar in alluvial during mining of pillar as a sand darrier and a fall - resisting unit.
【CateGory Index】: TD35
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