岩体裂隙网络注浆模拟试验系统研制及应用

doi:10.13722/j.cnki.jrme.2019.0998

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摘要为研究浆液在岩体裂隙网络内的扩散迁移规律，研制了可视化裂隙恒压注浆试验系统。该系统由供压设备、恒压出浆设备、裂隙模拟设备以及监测设备组成，可根据试验要求设计特定岩体裂隙网络，模拟不同注浆压力、浆液黏度、裂隙开度等多种参数影响下的浆液流动过程，并可研究裂隙岩体中浆液-水/气驱替作用机制。通过单一裂隙注浆理论与试验结果的对比，验证了本试验系统的可靠性。基于此，进一步研究了随机裂隙网络注浆扩散机制，结果表明：(1) 裂隙内同一点压力随注浆压力的增大而增大，随裂隙开度的增大而减小，不随浆液黏度的变化而变化；(2) 浆液在裂隙网络内由总流分散为支流后，压力显著下降，流速放缓，且各支流压力与流量分配系数受交叉(分叉)裂隙夹角影响较大。试验系统的研制及研究成果对岩体工程注浆具有一定指导价值。

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	刘滨1
	桑昊旻1
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	康永水1
	刘泉声3
	罗慈友1
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	赵程4

关键词 ：岩石力学, 岩体裂隙, 注浆, 扩散迁移, 模拟试验

Abstract：To study the diffusion and migration pattern of grouts in rock mass fracture network，a visual fracture constant pressure grouting test system，consisting of pressure supply equipment，constant pressure pumping equipment，fracture simulation equipment and monitoring equipment，was developed. The system can design a specific fracture network according to test requirements to simulate the grout flow process under various parameters such as grouting pressure，grout viscosity and fracture aperture and to investigate the grout-water/gas displacement mechanism in fractured rock mass. The reliability of the test system was proved by the comparison of the test results with the single fracture grouting theory，and the grouting diffusion mechanism of random fracture network was studied. The results show that the pressure at the same point in the fracture increases with increasing the grouting pressure or decreasing the fracture aperture but is not affected by the change of the grout viscosity，and that，after the grout is dispersed into several branches in the fracture network，the pressure drops significantly and the flow velocity slows down. It is also shown that the pressure of each branch and the flow distribution coefficient are greatly affected by the angle of the bifurcation (intersection) fracture. The test system and the study results have certain reference for the grouting engineering.

Key words： rock mechanics rock mass fracture grouting diffusion and migration simulation test

引用本文:

刘滨1，桑昊旻1，2，康永水1，刘泉声3，罗慈友1，2，赵程4. 岩体裂隙网络注浆模拟试验系统研制及应用[J]. 岩石力学与工程学报, 2020, 39(3): 540-549.
LIU Bin1，SANG Haomin1，2，KANG Yongshui1，LIU Quansheng3，LUO Ciyou1，2，ZHAO Cheng4. Development of grouting simulation test system for rock mass fracture network and its application#br#. , 2020, 39(3): 540-549.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0998 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I3/540

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