注浆裂隙岩体力学特性影响因素试验研究

doi:10.3724/1000-6915.jrme.2025.0138

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摘要注浆作为控制裂隙围岩稳定性的主要技术手段，其加固效果受多种因素影响。为探究裂隙倾角及岩石基质特性对裂隙注浆加固体力学性能演化机制的影响，开展不同裂隙倾角（? = 0°，15°，30°，45°，60°）的煤、泥岩及砂岩注浆裂隙岩体试样单轴压缩试验，同时结合数字图像（DIC）与声发射（AE）技术，分析其力学性能演化特征。试验结果表明：（1）随裂隙倾角增大，不同岩石基质裂隙注浆试样的峰值强度均呈先降低后增加的趋势；注浆裂隙煤与泥岩试样破坏模式由劈裂拉伸向沿裂隙剪切破坏转变，而砂岩试样则以界面剪切破坏为主。（2）DIC结果显示不同基质试样最大主应变均随裂隙倾角增大呈先增后减趋势，其中，泥岩试样破坏时最大主应变最小，而浆–煤试样应变场变化幅度最小。（3）声发射特征表明，随裂隙倾角增加，拉伸微裂纹占比逐渐降低，其中浆–煤试样拉伸裂纹占比最高而砂岩试样最低；结合声发射b值分析发现浆–泥岩试样破坏程度最小，而浆–砂岩峰后破裂程度最高。最后，提出浆–岩界面相关系数k，用以分析注浆裂隙岩体性能演化机制，表明裂隙倾角和岩石基质通过岩石强度和浆–岩界面特征共同控制了注浆裂隙岩体的力学行为。该研究为深部巷道注浆加固设计及围岩稳定性分析提供了理论与试验依据。

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	刘学伟1
	2
	刘云豪1
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	刘滨1
	2
	王赛1
	刘泉声3
	朱磊1
	朱元广1
	2

关键词 ：岩石力学, 裂隙注浆, 应变特征, 声发射, 裂隙倾角, 损伤特性

Abstract：Grouting as a main technical means for stability control of fractured surrounding rock, its reinforcement effect is controlled by many factors. To investigate the effect of inclination angle and rock matrix on grouting reinforcement, this paper carried out uniaxial compression tests of grouted coal, mudstone and sandstone specimens with different crack inclination angles (? = 0°, 15°, 30°, 45°, 60°). Combined with the digital image correlation (DIC) and acoustic emission (AE) technology, the evolution characteristics of their mechanical properties were investigated. Test results showed that: (1) the peak strength showed a tendency of decreasing and then increasing with the increase of inclination angle for different rock specimen; the damage mode of the grouted fractured coal and mudstone specimens shifts from split tensile to shear failure along the fracture, whereas the sandstone specimens were dominated by interfacial shear damage. (2) The DIC results showed that the maximum principal strains of different specimens first increase and then decrease as fracture inclination angle increases, which the mudstone specimens had the smallest value, and the coal specimens had the smallest changes in the strain field. (3) The acoustic emission characteristics showed that the percentage of tensile microcracks decreased with the increase of inclination angle. Combined with the analysis of acoustic emission b-value, the mudstone and sandstone specimens had the smallest and highest degree of failure, respectively. Finally, the slurry-rock interface correlation coefficient k was proposed to analyze the mechanical property evolution mechanism of the grouted fractured rock mass. Results indicated the inclination angle and rock matrix jointly controlled the mechanical behavior of the grouted fractured rock mass through the rock strength and slurry-rock interface characteristics. The above study provides theoretical and experimental basis for the design of grouting reinforcement and stability analysis of surrounding rock in deep tunnel.

Key words： rock mechanics fracture grouting strain characterization acoustic emission (AE) fracture inclination damage characterization

引用本文:

刘学伟1，2，刘云豪1，2，刘滨1，2，王赛1，刘泉声3，朱磊1，朱元广1，2. 注浆裂隙岩体力学特性影响因素试验研究[J]. 岩石力学与工程学报, 2025, 44(7): 1782-1799.
LIU Xuewei1, 2, LIU Yunhao1, 2, LIU Bin1, 2, WANG Sai1, LIU Quansheng3, ZHU Lei1, ZHU Yuanguang1, 2. Experimental investigation of the influencing factors on the mechanical properties of grouted fractured rock mass. , 2025, 44(7): 1782-1799.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2025.0138 或 https://rockmech.whrsm.ac.cn/CN/Y2025/V44/I7/1782

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