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Displacement Back Analysis Research on Bolt-grouting Supporting Parameter of Rock Mass in Jointed Rock Roadway

机译：节理岩巷岩体锚注支护参数的位移反分析研究。

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摘要

The method of bolt-grouting supporting, grouting into surrounding rock mass by bolts in jointed rock mass roadway, is obtained wide application. However, it is difficult to determine rock mass parameter of bolt-grouting supporting. This paper begins with the displacement, which is measured easily in practice. The method of back analysis is adopted to calculate the equivalent mechanics parameters of bolt-grouting rock mass. In process of back analysis three mechanics models is supposed which are homogeneous elastic model inhomogeneous elastic model and elastic-plastic model and corresponding algorithm is established. What's more, this paper discusses the stability of inverse algorithm and copes the problem of back analysis parameter probably instable with QR decomposed algorithm and singular value decomposed algorithm, which will be a theoretical base to determine the mechanics parameter of bolt-grouting supporting rock mass and to estimate the surrounding rock stability. In a word, the method is established to estimate mechanics parameters of bolt-grouting jointed surrounding rock mass, and some significant results are obtained, which are of reference for actual project.
机译：锚固支护巷道中的锚杆支护，锚固到周围岩体的方法得到了广泛的应用。但是，很难确定锚固支护的岩体参数。本文从位移开始，在实际中很容易测量。采用反分析的方法计算锚固岩体的等效力学参数。在反分析过程中，假设了三种力学模型：均质弹性模型，非均质弹性模型和弹塑性模型，并建立了相应的算法。此外，本文讨论了反演算法的稳定性，并通过QR分解算法和奇异值分解算法解决了反分析参数可能不稳定的问题，为确定锚固支护岩体力学参数提供了理论依据。估计围岩的稳定性。简言之，建立了估算锚固节理围岩力学参数的方法，取得了一些有意义的结果，可供实际工程参考。

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