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Preparation method of irregular columnar jointed rock mass sample of nested interlayer staggered belt

A columnar joint and sample preparation technology is applied in the field of irregular columnar joint rock mass sample preparation and rock mass sample preparation. Difficulty, easy to prepare, and the effect of improving efficiency

Active Publication Date: 2020-05-15
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the problem that the current sample preparation method cannot consider the interaction between columnar joints and interlayer dislocation zones, the present invention provides a method for preparing irregular columnar joint rock mass samples with nested interlayer dislocation zones

Method used

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  • Preparation method of irregular columnar jointed rock mass sample of nested interlayer staggered belt
  • Preparation method of irregular columnar jointed rock mass sample of nested interlayer staggered belt
  • Preparation method of irregular columnar jointed rock mass sample of nested interlayer staggered belt

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preparation example Construction

[0019] Such as figure 1 , a method for preparing an irregular columnar jointed rock mass sample with a nested interlayer dislocation zone of the present invention, comprising the following steps:

[0020] (1) Make an internal mold according to the structural characteristics of the rock mass at the engineering site. The internal mold includes a three-dimensional polygonal joint surface grid for simulating the structural characteristics of columnar joints. The joint surface grid is nested with interlayer staggered belt simulation components. Among them, the joint surface grid is made of water-soluble materials, and the staggered zone simulation components are made of soluble materials;

[0021] The internal mold can be obtained by the following method: First, determine the structural characteristics of the columnar joints and the structural characteristics of the interlayer dislocation zone according to the structural characteristics of the rock mass at the engineering site, and...

Embodiment

[0029] (1) Making the external mold of the columnar jointed rock sample with interlayer dislocation zone

[0030] Such as figure 2 , the external mold includes a bottom plate 1, a top plate 2, two long-side side plates 3, and two square short-side side plates 4; wherein, the bottom plate 1 and the two long-side side plates 3 are fixed by bottom plate bolts 5, and the top plate 2 and the two long side plates The side panels 3 are fixed by top plate bolts 6 , the two long side panels 3 are fixed by bolts 7 , and the short side panels 4 and long side panels 3 are fixed by bolts 8 .

[0031] (2) Preparation of internal mold

[0032] Draw the 3D model of the internal mold in the OpenSCAD software, set the columnar joints as regular hexagons with a side length of 5mm, the thickness of the joint surface is 1mm, the angle between the interlayer dislocation zone and the columnar joints is 60°, and the thickness of the dislocation zone is 4mm. The interlayer dislocation zone is locat...

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Abstract

The invention discloses a preparation method of an irregular columnar jointed rock mass sample with nested interlayer staggered belts. The method comprises the following steps: manufacturing an internal mold according to the rock mass structure characteristics of an engineering site, the internal mold comprising a three-dimensional polygonal joint surface grid used for simulating the columnar joint structure characteristics, an interlayer dislocation zone simulation component being nested in the joint surface grid, the joint surface grid being made of a water-soluble material, and the dislocation zone simulation component being made of a soluble material; pouring a joint column similar material into the joint surface grid, dissolving the joint surface grid with water after final setting, then pouring the joint surface similar material into the dissolved part, dissolving the dislocation zone simulation component with a solvent after final setting of the part, and then pouring the dislocation zone similar material into the dissolved cavity; and finally curing to obtain the sample. According to the method, the columnar jointed rock mass sample containing the interlayer dislocation zone can be simply and conveniently prepared, and a test basis is provided for research on the mechanical seepage permeability of the rock mass.

Description

technical field [0001] The invention relates to a method for preparing a rock mass sample, in particular to a method for preparing an irregular columnar jointed rock mass sample with a nested interlayer staggered zone, and belongs to the fields of rock mass mechanics and rock engineering. Background technique [0002] During the condensation process after the volcanic eruption, the volume of basalt shrinks rapidly to form basalt joint columns with straight joint planes and parallel to each other. The basalt columns are mostly quadrangular, pentagonal, and hexagonal. These polygonal joints are called columnar joints. Under the action of geological tectonic movement, the rock mass usually forms an interlayer dislocation zone. The rock in the interlayer dislocation zone is crushed and broken, and its mechanical properties are much weaker than that of intact rock blocks. Columnar joints and interlayer dislocation zones are common in basalt rock mass, and the two influence each o...

Claims

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Application Information

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IPC IPC(8): G01N1/36
CPCG01N1/36G01N2001/366
Inventor 徐卫亚黄威张涛王环玲胡明涛
Owner HOHAI UNIV
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