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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (6): 84-89.doi: 10.11872/j.issn.1005-2518.2016.06.084

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Analysis on Changes of Surface Morphological Characteristics of Joint Under Compression Closed Testing

WANG Weihua，LI Kun，YAN Zhe，TANG Xiu   

  1. School of Resource and Safety Engineering，Central South University，Changsha    410083，Hunan，China
  • Received:2016-02-26 Revised:2016-03-25 Online:2016-12-28 Published:2017-01-22

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Abstract:

The surface topography of rock joints has an important influence on the mechanical properties of rock.In order to study the change law of joint surface topography under normal compression，the compression tests were carried out on joints specimens.Joint surfaces were scanned by using 3D high precision laser profilometer （Talysurf CLI2000） before and after the experiments and 2D and 3D morphology characteristics map were obtained.And surface morphology feature height parameters are selected，including the maximum peak of the joint surface，high Sp，the maximum height SZ，maximum valley deep Sv，kurtosis coefficient Sku，partial slope coefficient Ssk，mean square height Sq，arithmetic mean height Sa.It is found that the Sp，Ssk，Sku decrease under normal stress，but decrease amplitude is smaller；SV decreases obviously under the compression closing test；Sz variation law is similar with above；Sa and Sq were increased after testing.The surface morphology of the joints has a significant effect on the closed curve of the joints.

Key words: rock joint morphology, compression closing test, high characteristic parameters, variation law

CLC Number: 

  • TD724

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