Effective length determining method for harshness coefficient size effect of rock structural face

A technology of roughness coefficient and size effect, which is applied in the direction of measuring devices, instruments, etc., can solve problems such as the inability to determine the roughness coefficient value of scale structural surfaces, etc., and achieve the effect of large implementation value and social and economic benefits, convenient operation and low cost

Inactive Publication Date: 2005-07-27
JINHUA VOCATIONAL TECH COLLEGE
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Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcoming of being unable to determine the roughness coefficient value of the full-scale structural surface due to the lack of a method for determining the effective length of the JRC size effect, and to provide a method that is simple in principle, easy to operate, low in cost, good in use, and easy to determine Determination method of JRC size effect effective length based on wall rock composition and different surface relief shapes

Method used

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  • Effective length determining method for harshness coefficient size effect of rock structural face
  • Effective length determining method for harshness coefficient size effect of rock structural face
  • Effective length determining method for harshness coefficient size effect of rock structural face

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Embodiment Construction

[0014] The JRC of 387 joints of the SSE group in the west slope of the Xiaolangdi Reservoir's wind and rain ditch with the sampling lengths of 10cm and 30cm 0 and JRC 30 Statistical measurements, and D converted from the JRC size-effect fractal model 30 The values ​​are listed in Table 1. According to the data in Table 1, the joints of calcareous fine sandstone and calcareous concretion claystone joints along strike direction and along dip direction L n -f relationship curve ( figure 2 ). Depend on figure 2 It can be obtained that the effective length L of the JRC size effect in the direction of the joint strike of calcareous fine sandstone n * is 120cm, the effective length L of the JRC size effect in the direction of the calcareous fine sandstone joint dip n * is 110cm, the JRC size-effect effective length L n * is 150cm, the JRC size-effect effective length L n * It is 160cm.

[0015]

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Abstract

A method for confirming effective length includes preparing 10 cm and 30 cm section for measuring and drawing out contour curve, measuring out fluctuation amplitude Ry10 and Ry30 for the two and to obtain JRC10, JRC30, E(JRC10) and E(JRC30); converting out fractal dimension D by JRC fractal model; substituting D valve to JRC formula for carrying out analysis of sampling length Ln to JRC dimension effect ratio f to obtain Ln-f curve and confirming that sampling length on Ln-f is effective length when f is 5%.

Description

(1) Technical field [0001] The invention relates to a method for determining the effective length of the JRC size effect, which is suitable for determining the effective length of the JRC size effect when estimating the roughness coefficient of the actual scale structure surface of a rock mass structural surface with the JRC size effect. (2) Background technology [0002] Before the present invention is made, there is no method for determining the effective length of the JRC size effect at present. The roughness coefficient (JRC) of the rock mass discontinuity surface has the property of size effect, and the natural rock outcrop generally cannot expose the complete structural surface. According to the measurement results of the roughness coefficient of the partially exposed structural surface and the JRC size effect fractal model, the Without the method for determining the effective length of the JRC size effect, it is still impossible to determine the roughness coefficient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/30
Inventor 杜时贵
Owner JINHUA VOCATIONAL TECH COLLEGE
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