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Method for taking values of mechanical and hydraulic properties of rock mass structural plane

A structural surface and hydraulic technology, applied in scientific instruments, mechanical roughness/irregularity measurement, measuring devices, etc., can solve problems such as the inability to determine large-scale structural surface mechanics, hydraulic property indicators, etc.

Inactive Publication Date: 2005-08-17
杜时贵
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Problems solved by technology

However, the mechanical and hydraulic properties of the rock mass structural surface have size effect properties. Since there is no method for determining the mechanical and hydraulic properties of the rock mass structural surface, it is impossible to determine the large-scale structural surface according to the small-scale indoor mechanical and hydraulic property test results. Mechanical and hydraulic property indicators make it difficult for small-scale indoor mechanical and hydraulic test results to be directly applied to engineering rock mass stability evaluation calculations through size effect reduction

Method used

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  • Method for taking values of mechanical and hydraulic properties of rock mass structural plane
  • Method for taking values of mechanical and hydraulic properties of rock mass structural plane
  • Method for taking values of mechanical and hydraulic properties of rock mass structural plane

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Embodiment Construction

[0022] The research shows that the size effect of the mechanical and hydraulic properties of the rock mass structural surface is mainly caused by the size effect of the roughness coefficient, so the stability threshold of the roughness coefficient of the rock mass structural surface can be used as the stability threshold of the mechanical and hydraulic properties of the rock mass structural surface. The mechanical and hydraulic properties of large-scale rock mass discontinuities are measured. According to the JRC statistical measurement results of Beishan diorite joint sampling size ranging from 10 cm to 100 cm, the JRC size effect fractal dimension (D n ) has relative stability, D n values ​​around a certain eigenvalue D n * Fluctuates up and down (ie D n * -δ≤D n ≤D n * +δ, δ is the residual, D n * On behalf of the sampling length is less than L n The fractal dimension eigenvalues ​​of the JRC size effect of structural planes in the range). Substituting the measur...

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Abstract

This invention relates to a large rock structure face mechanics and hydraulics property value fetch method including the following steps: uniformly arranging two test section of 10cm and 30cm demanded by statistics corresponding to the required measurement directions on a small size rock and plotting profile curves of the above mentioned section, measuring the fluctuation amplitudes of the profile curves, computing the factor value of each section roughness to compute the desired values based on the roughness factor E(JRCo), E(JRC30), obtaining D30 of JRC diameter effect to be substituted into a related JRC effect rate formula to get the Ln-f relationship map, when f=50%, the related sample length on Ln-f curve -the roughness efficiency is Ln taken as the substitution formula of rock structure face mechanics and hydraulics property value fetch.

Description

(1) Technical field [0001] The invention relates to a large-scale rock mass structural surface mechanical and hydraulic property value method, which is suitable for the occasion of performing large-scale rock mass structural surface mechanical and hydraulic property values ​​on rock mass structural surfaces with hydraulic and hydraulic property size effects . (2) Background technology [0002] Before the present invention is made, there is no method for determining the mechanical and hydraulic properties of large-scale rock mass structural surfaces. In the practice of rock mass engineering, due to high cost, long construction period, and great difficulties, large-scale rock mass structural surface mechanics and hydraulic tests are rarely carried out, and small-scale (generally 10cm×10cm to 20cm×20cm) indoor mechanics and hydraulic tests are usually carried out. The mechanical property test is used to provide the mechanical and hydraulic property indexes of the structural su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/28G01N33/00G01N33/24
Inventor 杜时贵
Owner 杜时贵
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