基于激光共聚焦扫描显微镜的岩爆试验碎片表面分形特征

doi:10.13722/j.cnki.jrme.2014.s2.025

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Abstract In order to obtain surface fractal characteristics of fragments from rock mechanics test，especially the two-dimensional fractal characteristics at yardstick below sub-millimeter，Projective Covering Method was utilized. Firstly，unloading damage phenomenon at cave waist was simulated by rock burst test，and then marble samples damage characteristic was studied. Secondly，3D surface data of fragments from rock burst test was acquired by Confocal laser scanning microscope. Surface area at different yardstick was acquired by Triangulation method and two-dimensional characteristic of fragments was analyzed. Thirdly，lower limit of yardstick was confirmed in surface area calculation by Projective Covering Method. Three conclusions were drawn. Firstly，surface area of fragment had multi-fractal characteristic at yardstick from 0.625 μm to 639.375 μm. Secondly，the distribution of surface areas growth rate was similar with normal distribution. At yardstick below 0.625 μm，increase of surface area was little，so 0.625 μm could be regarded as lower limit of yardstick in surface area calculating by Projective Covering Method. Thirdly，fracture analysis from scanning electron microscopy confirmed the lower limit of yardstick in surface area calculating and the multi-fractal characteristic of fragments.

Key words： rock mechanics confocal laser scanning microscope fragment of rock burst test multi-fractal characteristic

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	Articles by authors
	MA Aiyang
	WU Faquan
	SHA Peng
	WANG Dingwei

Cite this article:

MA Aiyang,WU Faquan,SHA Peng, et al. FRACTAL CHARACTERISTIC OF FRAGMENT SURFACE FROM ROCK BURST TEST BASED ON CONFOCAL LASER SCANNING MICROSCOPE[J]. , 2014, 33(S2): 3595-3600.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.025 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3595

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