基于数值模拟和Mindlin解的煤矿井塔纠偏研究

发布时间：2018-05-12 03:20

本文选题：井塔纠偏 + 应力解除法　；参考：《采矿与安全工程学报》2016年01期

【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。
[Abstract]:There are many theoretical calculations and applications of pile-raft foundation, soil nailing wall and rock anchor based on Mindlin stress solution, but it is rare to correct the deviation of shaft tower connected with shaft rigidity in coal mine. The stress relief method has been applied well in building deviation correction, but there is no precedent in shaft deviation correction. Finite element numerical simulation and Mindlin solution of elastic mechanics are used to verify the stress relief and correction of shaft tower. Considering the influence of soil excavation unloading ratio on Mindlin solution, the results are in agreement with the results of finite element numerical simulation. It can be verified that the stress relief method can be effectively applied to rectifying the deviation of the shaft, increasing the width of the stress relief zone, and increasing the width of the stress relief zone. Reducing the distance from the stress relief hole to the wellbore, increasing the depth of the stress relief hole and increasing the pore diameter of the stress relief hole can effectively improve the deviation correction effect.
【作者单位】：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;徐州矿务集团有限公司张双楼煤矿;
【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)
【分类号】：TD321

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