淋涌水碎裂煤岩顶板煤巷破坏特征及控制对策研究

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Abstract Aiming at the problem of surrounding rock violent failure of coal roadways with water spraying and gushing and fragmentation roof in the period of supporting and service processes，combining the field investigation，rock and coal experiment，numerical simulation，theoretical analysis and field test， the deformation mechanism of roadway，distribution of surrounding rock displacement field with I-steel support and bolt support and the corresponding dynamic failure characteristics，water spraying quantity of roof borehole，anchoring force test of bolt and cable applying new waterproof anchor agent and control measurement of fragmentation roof are researched systematically. Main contains and conclusions are as follows. (1) The destruction of fragmentation coal roof with water spraying and gushing mainly are the comprehensive actions of partial loading of support structure，invalidation of bolt and cable supporting weaken by water spraying of borehole and bed separation induced by large difference of rigid strengths of roof composite coal structure. (2) The new waterproof resin anchor agent is researched；and its stability performance is proved by both the bolting test in the fragmentation coal roof with water spraying and gushing and the later monitoring results of the cable. (3) The controlling countermeasures for the fragmentation coal roof with water spraying and gushing，which is called as “one system with four aspects”，are proposed；and the corresponding mechanical effect and the function to keep the roof stability of the concrete supporting measures are analyzed. (4) A typical successful case with the comprehensive controlling countermeasures of “one system with four aspects” applied to the fragmentation coal roof with water spraying and gushing is introduced in detail. The research achievements have been adopted in Huozhou mining and have the theoretical and practical values for the support technology of roadways with analogous conditions.

Key words： mining engineering fragmentation roof excavation and support dynamic failure waterproof resin anchor agent

Received: 19 August 2011

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http://www.rockmech.org/EN/Y2012/V31/I3/524

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