Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument

A testing method and testing instrument technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., to achieve the effects of high precision, simple operation, and high reliability

Inactive Publication Date: 2015-11-11
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a test method and instrument for measuring constant temperature adsorption of rock mass and monitoring rock mass strain, so as to solve the problem of providing evaluation standards for coal seam gas storage capacity through isothermal adsorption test of coal samples

Method used

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  • Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument
  • Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument
  • Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument

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Embodiment 1

[0049] Embodiment 1: Taking the test coal core constant temperature adsorption methane as an example (1 to 4MPa), the test steps include:

[0050] 1) Prepare a cylindrical coal core (the diameter of the core is smaller than the inner diameter of the adsorption tank, and the height of the coal core is smaller than the height of the adsorption tank), weigh the coal core, and record the mass of the coal sample M coal , stick horizontal and vertical strain gauges on its surface;

[0051] 2) Put the prepared coal core into the adsorption tank, and connect the strain gauge with the strain wire in the tank;

[0052] 3) Seal the adsorption tank, connect the adsorption tank with the vacuum pump through the upper interface of the tank, evacuate it, weigh the adsorption tank containing the rock core, and record the mass M coal+cell ;

[0053] 4) Put the adsorption tank into a constant temperature water bath, set the temperature of the water bath to the required measured value, and conn...

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Abstract

Belonging to testing methods and instruments for rock mass constant temperature and rock mass strain, the invention relates to a test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and an instrument. According to the test method, rock mass constant temperature adsorption capacity is measured by an indirect gravitational method, at the same time, transverse and longitudinal strain gauges can be pasted to a side of a tested sample, the strain condition of the rock sample is monitored while the rock sample reaches adsorption equilibrium, thus being convenient to analyze the relation between rock mass adsorption and rock mass microscopic stress. A plurality of adsorption tanks are added, also adsorption test is carried out on rock samples in different particle size ranges at the same time, the rock mass sample particle size measurement range is wide, and the particle size test range covers 100micrometer-20mm. The test method calculates the sample adsorbing capacity by high precision balance weighing, which is different from the previous volumetric method for measurement of adsorbing capacity. The method can be used for determining the adsorbing capacity of rock to gas in laboratories, test enterprises and government departments. The test instrument is single, has few joints, enhances the system airtightness, and has the characteristics of simple operation, simple and reliable calculation method, and high accuracy.

Description

technical field [0001] The invention relates to a testing method and instrument for rock mass constant temperature and rock mass strain, in particular to a testing method and instrument for measuring rock mass constant temperature adsorption and monitoring rock mass strain. Background technique [0002] A deeper understanding of the ability of coal seams to absorb gas and the composition and pressure of coal bed methane plays an important role in promoting the coal and coal bed methane industry. For many years, the isothermal adsorption test of coal samples has been used as a standard for evaluating the ability of coal seams to store gas and other gases. [0003] Traditionally, the volumetric method (volume method) is generally used to test the constant temperature adsorption of rock mass, but the rock mass samples tested by the traditional volumetric method are mostly powdery, with less mass, and the test methods and calculations are complicated. In addition, there are gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N3/00
Inventor 张磊屠世浩叶志伟张村屠洪盛王沉张艳伟
Owner CHINA UNIV OF MINING & TECH
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