摘要
根据贵州开磷集团用沙坝矿中厚破碎矿体条件,采用钢筋混凝土人工假顶下向分段充填法开采方法,在上分段设计施工钢筋混凝土人工顶板,使用可靠度理论分析了各参数对假顶强度的影响程度,探讨出人工假顶可靠概率下的合理取值,得出钢筋混凝土顶板可靠概率为90%时的假顶承载强度,以及该强度下的假顶厚度值以及合理配筋值。基于可靠度理论的假顶强度确定方法与配筋设计结果表明,采场跨度对假顶强度影响最大,在大跨度、高载荷下假顶承载强度满足需求,矿山效益及回采安全性得到提高。
Based on the actual condition of medium-thickness fractured orebody in Yongshaba Mine of Guizhou Kailin Group, an application of underhand cut-and-fill mining method was proposed in which reinforced concrete false roof was constructed. Firstly, a reinforced concrete false roof was designed in the upper subsection. After the influence of parameters on such false roof was analyzed based on reliability theory, the load-bearing strength and thickness of the reinforced concrete false roof, as well as practical reinforcement design under the reliable probability of 90% was concluded. The false roof strength determination and reinforcement design based on reliability theory show that the stope span has the greatest influence on the false roof strength. The load-bearing strength of false roof designed can meet the requirement under the condition of large span and high load, ensuring both mining benefit and operation safety on mine.
出处
《矿冶工程》
CAS
CSCD
北大核心
2013年第4期30-35,共6页
Mining and Metallurgical Engineering
基金
973课题(2010CB732004)
国家自然科学基金重点项目(50934006)
关键词
急倾斜破碎矿体
钢筋混凝土假顶
下向分段充填
可靠度理论
采场跨度
配筋设计
steeply-inclined fractured ore-body
reinforced concrete false roof
underhand cut-and-fill mining
reliability theory
stope span
reinforcement design
