30-07-2020 дата публикации
Номер: US20200240251A1
Автор:
Chen Chi,
Chen Mingzhong,
GUO Jianchun,
Huang Chuhao,
Huang Fenglan,
Li Junfeng,
Li Meiping,
Lu Cong,
Ma Li,
Wang Kun,
Yin Congbin,
ZHAO Zhihong,
Zheng Yunchuan,
Zhong Ye
Принадлежит:
A method for characterizing complexity of rock fracture based on fractal dimension and a device thereof are provided. The method includes steps of: collecting rock fracture samples of a rock, and collecting basic parameters of the rock; determining a fractal dimension of a rock fracture morphology of the rock; calculating the fractal dimension of the rock; calculating a complexity coefficient Fc of rock fracture of the rock; and characterizing a complexity of rock fracture of the rock based on the complexity coefficient Fc of rock fracture of the rock. In the present invention, combined with the fractal geometry theory, fracture complexity coefficient of shale rocks is redefined and calculated to accurately characterize rock fracture morphology, so that characteristics of rock fracture morphology is correctly understood and affecting factors of fracture morphology is analyzed. 2. The method for characterizing complexity of rock fracture based on fractal dimension in claim 1 , wherein the basic parameters in the step A comprise the fracture angle of the rock claim 1 , Poisson's ratio claim 1 , Young's modulus claim 1 , peak strain claim 1 , and peak stress.3. The method for characterizing complexity of rock fracture based on fractal dimension in claim 1 , wherein the step B further comprises:placing an end surface of the rock where the rock fracture is located within a square area of a certain length, and dividing the square area into a plurality of boxes with a side length R; andcalculating the number of the square boxes N(R) containing slits in different cases by adjusting the value of the side length R.4. The method for characterizing complexity of rock fracture based on fractal dimension in claim 1 , wherein in the step E:when Fc>1.2, the complexity of rock fracture of the rock is characterized as a composite failure mode;when 1.2>Fc>1, the complexity of rock fracture of the rock is characterized as a tensile splitting mode; andwhen 1>Fc, the complexity of rock ...
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