某矿山钢筋混凝土人工假顶设计

地下矿山采场顶柱是指由采场顶部终止回采水平至上部相邻阶段运输巷道底板之间，为了保证安全而留设的保护矿体。对于矿体顶底板围岩较为稳固、矿石资源价值较高以及充填材料缺乏的矿山来说，顶柱的留设势必造成不必要的资源浪费，并给矿山企业带来较大的经济损失。由于地质条件的复杂性、井下作业的局限性以及爆破落矿的破坏作用，留设的矿石顶柱往往不能较好发挥其设计作用。在保证采场内作业安全的前提下，为了回收该部分矿石资源，某矿山采用受力状态分析、理论计算等方法，设计出一种地下矿山钢筋混凝土人工假顶结构。通过造价及经济效益计算，设计的钢筋混凝土人工假顶造价为80万元，置换出的矿石顶柱资源价值为264万元，具有较好的经济效益。

Design of Reinforced Concrete Artificial False Roof in a Mine

Underground mine stope top pillar refers to the protective ore body set up in order to ensure safety between top stop mining level of stope and floor of the transportation roadway in the upper adjacent stage.For the mine with stable roof and floor surrounding rock,high value of ore resources and lack of filling materials,the retention of roof pillars will inevitably cause unnecessary waste of resources and bring great economic losses to enterprises.And besides,due to the complexity of geological conditions,the limitations of underground operations and the damage of blasting,ore pillars often fail to give full play to their design role.A reinforced concrete artificial roof structure for the underground mine was designed by means of stress state analysis,theoretical calculation.Through cost and economic benefit calculation,the cost of artificial reinforced concrete roof is 0.8 million yuan,and the resource value of the replaced ore roof pillar is 2.64 million yuan,which has good economic benefits.