Method for preparing gouge mark structure-containing columnar jointing sample for seepage test

A columnar joint and sample preparation technology, which is applied in the preparation of test samples, permeability/surface area analysis, and measurement devices, can solve the problems of consistent filling degree and roughness, poor applicability, and changing seepage paths, and achieve the goal of overcoming Large environmental impact, high economic benefit, high repeatability effect

Active Publication Date: 2017-05-31
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of laboratory test research on columnar jointed rock mass, most of the research is through mixing river sand, cement, gypsum and other materials in different proportions combined with mold casting samples. It is difficult to prepare samples that meet the requirements of the seepage test, because this method is difficult to achieve the same joint width, filling degree and roughness of the prepared samples in terms of joint width control
[0005] To sum up, the research on the seepage theory of joint network is not perfect, and the research on the joint seepage characteristics of columnar joint rock mass is almost blank; the existence of columnar joint chisel structure significantly changes the seepage path, and there are no relevant studies in the existing research results; The sample preparation method with throttling network for seepage test is poor in applicability

Method used

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  • Method for preparing gouge mark structure-containing columnar jointing sample for seepage test
  • Method for preparing gouge mark structure-containing columnar jointing sample for seepage test
  • Method for preparing gouge mark structure-containing columnar jointing sample for seepage test

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preparation example Construction

[0031] Such as figure 1 As shown, a method for preparing a columnar joint sample with chisel structure for seepage test, comprising the following steps:

[0032] (1) In-situ measurement of the geometric shape, occurrence, column diameter5, columnar joint width, joint filling degree, columnar chiseling structure stripe width3 and thickness4 of basalt columnar joint rock mass condensation surface;

[0033] The columnar joints, hidden joints and micro-cracks of basalt are filled by secondary yellow mud, and the column surface is distributed with gouging stripes, and the gouging structure is divided into smooth part 2 and rough part 1;

[0034] (2) Based on the principle of similarity ratio, use Revit software to construct a three-dimensional scaled geometric model and import it into a 3D printer;

[0035] According to the in-situ geological survey data, the Revit2013 software was used to generate the 3D model of the cylinder and the 3D model of the columnar joint network, and th...

Embodiment

[0045] Taking the preparation of a columnar joint rock mass with chiseling structure in a certain columnar joint area in Zhejiang Province as an example, a preparation method of a columnar joint sample with chiseling structure for seepage tests of the present invention is as follows:

[0046] (1) In-situ measurement of the condensing surface of the basalt columnar joint rock mass. Streak width 3 and thickness 4, etc., based on the principle of geometric similarity ratio, the size of the column 8 is reduced to 1 / 25 of the original, and the 3D models of the column 8 and the joint network 9 are respectively constructed using Revit2013 software;

[0047] (2) Import the model into the MakerBot Replicator 3D printer, use basalt powder as the column 8 material, and secondary yellow mud as the joint network 9 filling material into the two nozzles of the MakerBot Replicator 3D printer, and the two nozzles print at the same time to form a chisel The initial sample of rock mass with trac...

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Abstract

The invention discloses a method for preparing a gouge mark structure-containing columnar jointing sample for a seepage test. The method comprises measuring a geometrical shape, occurrence, a column diameter, columnar jointing width, a jointing filling degree, and cylindrical surface gouge mark structure stripe width and thickness of the condensing surface of a basalt columnar jointing rock in situ, according to a similarity ratio principle, building a 3D reduced scale geometric model through Revit software, introducing the 3D reduced scale geometric model into a 3D printer, respectively filling two nozzles of the 3D printer with basalt powder as a columnar material and secondary yellow mud as a jointing material, and carrying out synchronous printing to obtain a sample of a gouge mark structure-containing columnar jointing network model, wherein after later processing and curing, the model can be used for a columnar jointing rock seepage test. Through use of the jointing surface gouge mark structure, the sample can really reflect the structure and shape of the gouge mark structure-containing columnar jointing network model and can provide a novel research idea for anisotropic seepage of the columnar jointing.

Description

technical field [0001] The invention relates to a method for preparing a columnar joint sample with gouging marks for seepage tests, and belongs to the interdisciplinary technical field of geology, seepage mechanics, rock mechanics and the like. Background technique [0002] Joints are a kind of geological discontinuities widely distributed in rock mass. The seepage of rock mass is essentially the seepage of discontinuous surface and its network. Therefore, the study of joint seepage characteristics is of great significance to the hydraulic properties of rock mass. In the early research on the seepage characteristics of joints, the joints were assumed to be smooth parallel plates, and the classic cubic law was developed. However, the actual rock joints are not smooth and straight. Relevant scholars in the field of seepage have proposed joint roughness coefficients and channel tortuosity coefficients. A lot of beneficial research has been carried out on joint seepage and joi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N1/28
CPCG01N1/28G01N15/08
Inventor 孔洋阮怀宁朱珍德石崇曹松华张聪
Owner HOHAI UNIV
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