中文摘要：

大型岩质滑坡往往伴随热效应,热效应引起的摩擦系数降低可以用来解释高速远程现象。为了研究岩体结构面剪切破坏后表面热量产生特征,首先,分别利用红外热成像仪和三维激光扫描仪对直剪试验破坏后的结构面表面进行拍摄与扫描,得到其表面温度分布与精细几何信息。然后,利用数学统计方法获取剪切破坏后结构面表面温度分布情况;利用改进的2D divider方法获得结构面表面三维模型的分形维数,进行粗糙度评价。最后,结合直剪试验正向应力数据,分析岩体结构面剪切破坏后表面平均温度与其所受正应力以及粗糙程度两参数之间的拟合关系。结果显示：滑坡启程阶段（低速剪切）破坏中（1）岩体结构面表面粗糙程度影响剪切过程中热量的产生,表面越粗糙,产生的热量越多,并且热量主要集中在结构面表面凸起部位;（2）岩体结构面所承受的正压力影响剪切过程中热量的产生,正应力越大,产生的热量越多;（3）岩体结构面表面粗糙度对剪切破坏热量产生的影响较所受正应力略大。研究成果为大型岩质滑坡破坏过程中的能量研究提供了技术参数与理论支持。

英文摘要：

Large-scale rock landslides always are accompanied by thermal effect. Reduction of friction coefficient caused by the thermal effect can be used to explain the phenomenon of high-speed and long travel distance of landslide debris. The objective of this study is to understand the characteristics of heat generating on the rock joint surface after shear failure. First,the temperature and geometric data with respect to discontinuities surface are investigated using infrared thermal radiation imager and three-dimensional（ 3D） laser scanner respectively.Secondly,based on the statistical methods,the surface temperature distribution of rock joint after shear failure is obtained. On the other hand,the improved 2D divider method is employed to estimate the rock joint surface roughness through calculation of fractal dimension value for each sample. Thirdly,combined with the direct shear tests,multiple regression analysis is conducted among average temperature,normal stress,and roughness on the surface of rock joint. Under the condition of low shear speed（ at the primary stage of sliding）,the following results are found that：（ 1） The average temperature on the surface increases with the roughness of rock joint. The heat is mainly concentrated in the convex parts of rock joint surface;（ 2） The average temperature on the surface is directly proportional to the normal stress loaded on the rock joint;（ 3） The effect of rock joint surface roughness on the heat generation after shear failure is slightly larger than that of the normal stress. The testing results can provide technical parameters and theoretical help for investigation of energy during failure of large-scale rock landslides.