考虑流变效应的房柱法矿柱尺寸优化设计  

Optimization Design of Pillar Size in Roompillar Mining Method Considering Rheological Effects

作　　者：周趾金 关炜 王秦涛 王宗伟 范家亨 ZHOU Zhijin;GUAN Wei;WANG Qintao;WANG Zongwei;FAN Jiaheng(Yichang Mingxin Industry&Trade Co.,Ltd.)

机构地区：[1]宜昌市明鑫工贸有限公司

出　　处：《现代矿业》2024年第7期71-75,80,共6页Modern Mining

摘　　要：采用房柱法开采时会遗留下大量矿柱支撑上覆岩层,合理的矿柱尺寸是维护采空区稳定的关键。为研究某磷矿的合理矿柱尺寸,考虑岩石自身的流变性质,通过理论计算得到矿柱的合理尺寸区间;在此基础上建立相应尺寸矿柱的采空区数值模型。赋予矿柱Burgers本构模型,分别进行有、无锚杆支护下的开挖模拟,分析采场应力和位移变化特征。研究结果表明,矿柱尺寸越大,顶板和矿柱的受力情况越好,顶板下沉量越小,蠕变效应越不明显。锚杆可以提升顶板的整体刚度,抑制顶板下沉,在小矿柱采场中支护效果明显。研究结果可以为房柱法采场矿柱的设计提供一定参考。A large number of pillars will be left to support the overlying strata when using roompillar mining method.Reasonable pillar size is the key to maintaining the stability of goaf.In order to study the rea⁃sonable pillar size of a phosphate rock,considering the rheological properties of the rock itself,the reason⁃able size range of the pillar is obtained by theoretical calculation.On this basis,a numerical model of goaf with corresponding size pillar is established.The Burgers constitutive model of the pillar is given,and the ex⁃cavation simulation with or without bolt support is carried out respectively,and the variation characteristics of the stress and displacement of the stope are analyzed.The results show that the larger the pillar size is,the better the stress of the roof and the pillar is,the lower the roof subsidence is,and the less obvious the creep effect is.The anchor bolt can improve the overall stiffness of the roof and inhibit the roof subsidence,and its supporting effect is obvious in the small pillar stope.The research results can provide some reference for the design of pillar size in roompillar stope.

关 键 词：房柱法采矿 矿柱尺寸 采空区 顶板沉降 

分 类 号：TD823[矿业工程—煤矿开采]