基于数值模拟和Mindlin解的煤矿井塔纠偏研究  

Study of rectifying shaft tower based on numerical simulation and Mindlin's equation

作　　者：曾卫[1] 马金荣[1] 文凯[1] 朱坤朋 何亚[2] 杨翰[2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室力学与建筑工程学院,江苏徐州221116 [2]徐州矿务集团有限公司张双楼煤矿,江苏徐州221616

出　　处：《采矿与安全工程学报》2016年第1期83-87,共5页Journal of Mining & Safety Engineering

基　　金：江苏省建筑安全与减灾工程技术研发中心开放课题项目(SAQZX2011-5);江苏省高校科研成果产业化推进项目(JHB2012-69)

摘　　要：基于Mindlin应力解的桩筏基础、土钉墙、岩石锚杆等的理论计算及应用较多,但是对与煤矿井筒刚性连接的井塔进行纠偏处理在实际工程中比较少见。应力解除法在房屋纠偏中得到了良好的运用而在井塔纠偏中还无先例。应用有限元数值模拟和弹性力学Mindlin解2种方法对井塔应力解除纠偏进行验证。通过考虑土体开挖卸荷比对Mindlin解影响而对其进行修正,得到的结果与有限元数值模拟结果一致,可以验证:应力解除法能够有效运用于井塔纠偏;增大应力解除区宽度、减小应力解除孔到井筒的距离、适当增加应力解除孔深度和增大应力解除孔孔径可以有效提高纠偏效果。The theoretical calculation and application based on the Mindlin＇s Stress Equations have been widely used in Piled raft foundation, soil nailing wall, rock bolt foundation, etc., while rarely used in rectifying the tower, which has rigid connection with the shaft. Stress relief method has been successfully used in rectifying building but none in rectifying shaft tower. Numerical simulation and the Mindlin＇s equations have both been utilized to verify that the stress relief method is effective in rectifying shaft tower. The results of Mindlin＇s equations have been revised by considering the unloading ratio of the excavation, and they are in great accordance with the numerical simulation results. Both of them have shown that stress relief method can be successfully used in shaft tower rectification; and that increasing the width of the stress relief area, shortening the distance between stress relief hole and shaft tower, deepening the stress relief hole and increasing the diameter of the stress relief hole can effectively enhance the rectifying performance.

关 键 词：井塔纠偏 应力解除法 三维有限元 MINDLIN解 

分 类 号：TD324[矿业工程—矿井建设]