云南矿工钢浅析非对称u型钢支架内力计算--昆明矿工钢
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浅析非对称u型钢支架内力计算
[ 2013/8/29 ]
[*]浅析非对称u型钢支架内力计算
u型钢支护时广泛应用于矿山巷道的一种支护，由于巷道围岩的岩性分布在距离巷道的一定范围内是关于巷道竖直对称面对称的，因此常把围岩应力分布关于此对称面近似为对称。据此，在进行u型钢支护时大都是按照对称结构进行支护的。但当围岩应力分布不对称时却仍按照应力对称分布来进行对称形式的支护，无论是从经济上还是效果上都将会是对资源的一种浪费。金属支架在支护过程中，支架借助于背板而紧贴于围岩，为说明方便，此处可假设巷道周围的围岩应力都能作用于u型钢支架上，若在实际中存在分离情况，可令分离区域对u型钢支架的作用力为零。
U-shaped steel support widely used in mine roadway a support, because a certain range of roadway surrounding rock lithology distribution in distance roadway roadway is a vertical symmetry plane symmetric, so often the surrounding rock stress distribution on the plane of symmetry is approximately symmetrical. Accordingly, the U-shaped steel support are in accordance with the symmetric structure of support. But when the surrounding rock stress distribution asymmetry is still in accordance with the stress distributed symmetrically to symmetrical forms of support, both from the economiceffect would be a waste of resources. Metal stents in the supporting process, with the help of the back bracketclose to the rock, to illustrate the convenience, here to stress can act on the U steel supports hypothesis of roadway surrounding rock around the existence of separation, if in reality, can make the separation force region of the U steel bracket is zero.
云南恒筹商贸有限公司是云南地区专业销售矿工钢、u型钢、工字钢集仓储、物流为一体的专业型企业。
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