冬瓜山铜矿采准巷道钢筋混凝土支护稳定性分析

Stability Analysis of Reinforced Concrete Sustained and Protection of Mining Preparatory Tunnel in Dongguashan Copper Mine

冬瓜山铜矿是我国首批迈入深部开采的矿山之一,采用空场回采嗣后充填采矿方法,"隔一采一"的回采顺序,因此作为矿柱采场的采准巷道受到高应力的作用。基于冬瓜山矿柱采场的采准巷道钢筋混凝土支护结构存在裂缝的这一工程问题,结合现场巷道实际情况,创建结构力学分析模型,对其支护结构进行了内力分析,找出产生裂缝的原因,提出合理的应对措施。

As one of the first mines which step into deep mining in China, Dongguashan copper mine uses open stope back -filling mining method with ＂one partition one＂ recovery order, therefore mining preparatory tunnel in pillar stope often under high stress. To solve the engineering problem of cracks existing in the reinforced concrete supporting structure of mining preparatory tunnel of Dongguas- ban pillar stope, combined with practical situation of site tunnel, a structural mechanics analysis model was created. Internal force was analyzed with support structure, and formation reason of crack was found. In the end, some reasonable engineering countermeasures and suggestions are proposed.