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| INFLUENCE OF SURFACE TOPOGRAPHY ON CONSTITUTIVE PARAMETER OF ROCK FRICTIONAL SLIDING |
| HAN Wenmei1，2，KANG Tianhe2，LI Jianjun1 |
(1. School of Science，North University of China，Taiyuan，Shanxi 030051，China；2. Institute of Mining Technology，
Taiyuan University of Technology，Taiyuan，Shanxi 030024，China) |
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Abstract The typical test apparatus of rock friction sliding was designed and improved. The samples including phyllite，quartzite，quartz sandstone，lithic sandstone，marble，limestone，lite limestone and dolomitic limestone were studied experimentally using the apparatus. The polished surfaces of the samples were taken as the frictional sliding surfaces. The force-displacement curves of frictional sliding for the samples were investigated experimentally under the natural state，saturated state and dry state. The frictional sliding constitutive parameters were analyzed according to Ruina-Dieterich(R-D) constitutive model；and the influence of the asperities and fractal dimensions of polished surfaces for the samples on the constitutive parameter was analyzed. The test results reveal that the three parameters which are the mean diameter of the asperity，the mean height of the asperity and the mean height of the surface profile are different for different rocks under the same polishing condition. As for the mean diameter of the asperity，the mean height of the asperity and the mean height of the surface profile increase，the constitutive parameters are decreased with the linear law. The surface topography of the sliding surface finer，fractal dimension is larger. The constitutive parameters are increased with the linear law as fractal dimension increases.
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Received: 18 December 2012
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2013, Vol. 32 
