(1. 河南理工大学 能源科学与工程学院，焦作 454003；
2. 河南理工大学 深井瓦斯抽采与围岩控制技术国家地方联合工程实验室，焦作 454003；
3. 河南理工大学 煤炭安全生产与清洁高效利用省部共建协同创新中心，焦作 454003)
摘 要: 采用不同强度的水泥砂浆块模拟均质性较好岩性不同的岩体，开展承压注浆加固含弱面岩体时的岩-浆抗剪强度耦合机理研究，探索承压注浆加固效果的评价机制。结果表明：承压注浆加固可有效提高含弱面岩体的抗剪强度，并延缓含弱面岩体宏观破坏的发生；含弱面岩体抗剪强度随法向应力的增大呈线性趋势增加，随着注浆材料强度的增强呈对数函数趋势增加，且抗剪强度参数(τ、c、φ)都随注浆材料强度和岩体基体强度比值的增大呈先增大后减小的趋势变化；含弱面岩体黏聚力随注浆材料强度、岩体基体强度的增加呈线性增加，内摩擦角却随注浆材料强度的增加而减小，随岩体基体强度的增加维持稳定。试验验证了基于岩-浆抗剪强度耦合机理建立的承压注浆加固含弱面岩体效果评价准则能有效判定承压注浆加固的最优效果，可用于指导含弱面岩体注浆加固控制工程。
关键字: 承压注浆；含弱面岩体；抗剪强度；耦合机理；评价准则
（1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China;
2. State and Local Joint Engineering Laboratory for Gas Drainage and Ground Control of Deep Mines, Henan Polytechnic University, Jiaozuo 454003, China;
3. Collaborative Innovation Center of Coal Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo 454003, China）
Abstract:By using cement mortar blocks with different strengths to simulate the rock masses with good homogeneity and different lithology, the coupling mechanism of rock-slurry shear strength of weak-faced rock mass under pressure grouting for reinforcement was researched to explore the evaluation mechanism of pressure grouting for reinforcement effect. The results show that the pressure grouting for reinforcement can improve shear strength and delay the macroscopic failure of weak-faced rock mass effectively. The shear strength of weak-faced rock mass expresses a linear growth with the increasing normal stress, and it rises in a logarithmic function with increase the strength of grouting material, moreover, the shear strength parameters (τ, c, φ) first increase and then decrease as the ratio of grouting material strength and rock mass strength adds. The cohesive force of weak-faced rock mass adds linearly with the enhancive grouting material strength and rock mass strength, while the internal friction angle declines with increasing the grouting material strength, and it remains constant as the rock mass strength enhances. Based on the coupling mechanism of rock-slurry shear strength, the evaluation criteria for effect of weak-faced rock mass under pressure grouting for reinforcement is able to determine effectively the optimal effect of the pressure grouting for reinforcement. This point was verified, and it can be used to guide the control project of grouting reinforcement of weak-faced rock mass.
Key words: pressure grouting; weak-faced rock mass; shear strength; coupling mechanism; assessment criteria
