矿柱抗剪安全系数的数值计算方法及分析  

Numerical Calculation Method for Shear Safty Coefficient of Mine Pillar

作　　者：王在泉[1] 李华峰[1] 

机构地区：[1]青岛理工大学理学院,山东青岛266033

出　　处：《采矿与安全工程学报》2010年第2期277-280,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金资助项目(50674059);山东省自然科学基金资助项目(Y2005A03)

摘　　要：基于矿柱多为剪切破坏的特征,提出了矿柱抗剪安全系数的概念,研究了数值计算中矿柱失稳的判据,即以矿柱破裂面上节点的塑性应变或位移突变作为矿柱整体失稳的标志.采用有限元强度折减法计算了矿柱的抗剪安全系数,通过与传统方法所得安全系数的分析比较,提出判断矿柱稳定性的抗剪安全系数标准,即当矿柱的抗剪安全系数大于1.2,此时传统的抗压安全系数大于2.6,矿柱是安全可靠的.Based on the shear rupture characteristics of mine pillar,the safety coefficient concept of mine pillar shear strength is put forward.The criterions of loss of pillar stability is numerically calculated,which means that the dramatic increase in displacement or plastic strain of nodes located in the fracture surface of the pillar can be thought as the criterions of pillars.The safety coefficient of mine pillar shear strength is figured by the finite element method of strength reduction and the safety coefficient standard of mine pillar stability is put forward,that is,when the safety coefficient of mine pillar shear strength is in greater than 1.2,the pillar stability is assured at the same time,the traditional compression strength coefficient is greater than 2.6.

关 键 词：有限元强度折减 矿柱失稳 安全系数 抗剪强度 

分 类 号：TU375.1[建筑科学—结构工程]