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Making method of rock sample with specific water content in unsaturated water state

A technology of rock sample and water content, which is applied in the preparation of test samples, etc., can solve the problems of low efficiency, large uncertainty, and difficult to control the water content of rock samples, and achieves high efficiency, simple method, and saving screening. effect of time

Inactive Publication Date: 2016-08-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many methods for preparing water-saturated rock samples, such as natural immersion method, boiling method, and vacuum saturation method; Therefore, the rock samples with unknown water content can be selected to meet the requirements. The uncertainty is large, the efficiency is low, and the water content of rock samples is difficult to control.
Although the above-mentioned conventional methods for preparing rock samples with a specific water content can meet the preparation requirements to a certain extent, they have large uncertainties and low efficiency, and this type of method is gradually eliminated. New methods of sample preparation are still being explored

Method used

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  • Making method of rock sample with specific water content in unsaturated water state
  • Making method of rock sample with specific water content in unsaturated water state
  • Making method of rock sample with specific water content in unsaturated water state

Examples

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Effect test

Embodiment 1

[0056] The invention discloses a method for preparing a rock sample with a specific water content in an unsaturated state.

[0057] The steps of the preparation method described in this embodiment are:

[0058] Step 1. Making rock samples with natural moisture content

[0059] According to the "GB / T50266-99 Engineering Rock Mass Test Method Standard", rock samples with natural moisture content were prepared. The rock sample is a conventional cylindrical standard test block with a size of φ50mm×100mm.

[0060] Step 2, weighing the mass of the dried rock sample in the air

[0061] Put the rock sample with natural moisture content into an oven, and dry it at 115-120°C for 20-25 hours to obtain a dried rock sample; then place the dried rock sample in a precision Weigh on the balance, record the mass m of the dried rock sample in the air 1 It is 528.34g.

[0062] Step 3, weighing the mass of the dried rock sample in water

[0063] The dried rock sample is placed on the chassi...

Embodiment 2

[0094] The invention discloses a method for preparing a rock sample with a specific water content in an unsaturated state. The steps of the preparation method described in this embodiment are:

[0095] Step 1. Making rock samples with natural moisture content

[0096] According to the "GB / T50266-99 Engineering Rock Mass Test Method Standard", rock samples with natural moisture content were prepared. The rock sample is a conventional cylindrical standard test block with a size of φ50mm×100mm.

[0097] Step 2, weighing the mass of the dried rock sample in the air

[0098] Put the rock sample with natural moisture content into an oven, and dry it at 115-120°C for 20-25 hours to obtain a dried rock sample; then place the dried rock sample in a precision Weigh on the balance, record the mass m of the dried rock sample in the air 1 It is 531.87g.

[0099] Step 3, weighing the mass of the dried rock sample in water

[0100] The dried rock sample is placed on the chassis 6 of "a...

Embodiment 3

[0123] The invention discloses a method for preparing a rock sample with a specific water content in an unsaturated state. The steps of the preparation method described in this embodiment are:

[0124] Step 1. Making rock samples with natural moisture content

[0125] According to the "GB / T50266-99 Engineering Rock Mass Test Method Standard", rock samples with natural moisture content were prepared. The rock sample is a conventional cylindrical standard test block with a size of φ50mm×100mm.

[0126] Step 2, weighing the mass of the dried rock sample in the air

[0127] Put the rock sample with natural moisture content into an oven, and dry it at 115-120°C for 20-25 hours to obtain a dried rock sample; then place the dried rock sample in a precision Weigh on the balance, record the mass m of the dried rock sample in the air 1 It is 530.14g.

[0128] Step 3, weighing the mass of the dried rock sample in water

[0129] The dried rock sample is placed on the chassis 6 of "a...

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Abstract

The invention relates to a making method of a rock sample with specific water content in an unsaturated water state. The making method comprises the following steps: 1, making a rock sample with natural water content according to GB / T50266-99 Engineering Rock Test Method Standard; 2, drying the rock sample with natural water content, and recording the mass m1 of the dried rock sample in air; 3, putting the dried rock sample in a beaker (5), adding distilled water (10), and recording to the mass m2 of the dried rock sample in water; 4, obtaining the rock sample with specific water content according with a theoretical value when the mass of the rock sample immersed in water on a precision balance (3) reaches the theoretical mass m3 of the rock sample with specific water content in water; and 5, obtaining the rock sample with specific water content in an unsaturated water state when the practical water content error epsilon of the rock sample with specific water content according with the theoretical value is not greater than 5%, and repeating above steps when the practical water content error epsilon is greater than 5%. The method has the characteristics of simplicity, convenient operation, high efficiency and high precision.

Description

technical field [0001] The invention belongs to the technical field of rock samples with specific water content. In particular, it relates to a method for preparing a rock sample with a specific water content in an unsaturated state. technical background [0002] The water content has an extremely important influence on the physical and mechanical properties of rocks. The same rock with different water contents often exhibits quite different physical and mechanical properties. In actual engineering, the strength and hardness of rocks under dry conditions meet the engineering requirements, but it is not uncommon for the strength of rocks to decrease significantly after being exposed to water. On the one hand, water has a certain bonding effect on rock particles, especially rocks containing more clay minerals, which will soften when encountering water, which directly affects the deformation and strength of rocks; on the other hand, rock mineral particles will The dissociated...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/30
CPCG01N1/28G01N1/30
Inventor 刘艳章潘世华朱典叶义成唐红柯丽华王文杰张红军邹晓甜陈小强张奎吴恩桥刘永涛
Owner WUHAN UNIV OF SCI & TECH
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