Simulation experiment method for evaluating grouting reinforcement effect of different factors on fractured rock mass

Abstract

The invention discloses a simulation experiment method for evaluating a grouting reinforcement effect of different factors on a fractured rock mass. The fractured wall rock of an underground engineering is simulated by combining crushed rock particles in different particle size, different orthogonal experiments of different levels are designed for various factors influencing the grouting reinforcement effect, different factors are comprehensively researched, and the factor which severely influences the reinforcement effect of the crushed wall rock as well as a parameter range and a relation of the remarkable influence factor and an evaluation index can be obtained. The method is scientific and rigorous, various factors influencing the grouting reinforcement effect of the fractured wall rock can be comprehensively researched, and instructive significance for scheme design and implementation for grouting reinforcing on-situ fractured wall rock of the underground engineering can be realized.

Description

technical field [0001] 本发明属于地下工程中安全技术领域,特别涉及地下工程注浆方案中各因素对破碎围岩注浆加固效果的研究和注浆方案的设计。 Background technique [0002] 由于地下工程开挖造成的硐室四周围岩的破碎,以及地下工程所经过的天然的围岩破碎带,会对地下工程的安全造成极大的威胁。不仅破碎围岩可能脱落伤到工作人员,而且围岩自身强度作为维持地下工程稳定性的重要组成部分,围岩破碎导致的强度不足,致使地下工程变形过大、支护结构失效,对工程安全产生重大隐患。经实践证明,通过对地下工程破碎围岩进行注浆加固,对改变围岩强度、发挥围岩自身承载力、保障地下硐室安全具有良好的效果,实现了增加围岩强度的目的。 [0003] 与快速发展的注浆加固实践相比,注浆加固理论发展缓慢,极有必要对注浆效果相关因素进行全面的研究,来指导注浆实践的进行。 [0004] 目前还没有全面研究注浆加固各影响因素的实验方法,无法对注浆加固的各影响因素进行全面的认识和评价。 Contents of the invention [0005] 鉴于此,为了解决上述问题,本发明提供一种评价不同因素对破碎岩体注浆加固效果的模拟实验方法,通过用磨碎的不同粒径岩粒的组合来模拟地下工程的破碎围岩,通过对影响注浆加固效果的各因素设计不同水平的正交实验,对各因素进行全面的研究,得到对破碎围岩加固效果较显著的因素和使破碎围岩注浆加固效果较好时各相关因素的参数范围。 [0006] 为了实现该目的,本发明采用如下技术方案: [0007] 评价不同因素对破碎岩体注浆加固效果的模拟实验方法,包括以下步骤: [0008] 步骤1:从地下工程破碎围岩中取样、磨碎并按粒径归类,确定影响注浆加固的各因素,根据所述各因素的经验水平,设计初步的正交实验方案; [0009] 步骤2:按照所述正交实验方案,实施注浆加固试验,并进行试验材料加固后的岩石力学参数测试; [0010] 步骤3:利用所得测试数据绘制趋势图以对各因素进行直观分析,用非标准组与标准组相应岩石力学参数对比的提高率作为评价指标并进行正交实验数据分析及评价,得到影响破碎围岩加固效果的显著性影响因素,和使破碎围岩注浆加固效果良好时各相关因素的参数范围, [0011]...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no comprehensive experimental method to study the various influencing factors of grouting reinforcement, and it is impossible to fully understand and evaluate the various influencing factors of grouting reinforcement.

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