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Method for determining porosity of rock at any time of loading

A technology of any time and porosity, applied in the field of geotechnical engineering, it can solve the problems of complex porosity, difficult to achieve, and heavy workload, and achieve the effect of accurate calculation results.

Inactive Publication Date: 2018-11-20
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

Due to the long-term high stress state of the deep rock mass, the existing methods for measuring the porosity of rocks in complex environments are relatively complicated, and the workload is relatively large, which is basically difficult to achieve

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  • Method for determining porosity of rock at any time of loading
  • Method for determining porosity of rock at any time of loading
  • Method for determining porosity of rock at any time of loading

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Embodiment Construction

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] A method for determining the porosity of rocks at any moment of loading, the procedure is as follows figure 1 As shown, the specific method is as follows:

[0030] Step 1: Trim the rock sample that has been simply cut on site with a cutting machine so that it can be placed on the coring machine.

[0031] Step 2: Use a coring machine to core the rock sample using the water drilling method. The processing accuracy is strictly in accordance with the "Standard for Rock Test Methods" (GB50218-94), so that the shape of the core is a cylinder with a diameter of 50mm and a height of 100mm. Use a cutting machine to c...

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Abstract

The invention provides a method for determining porosity of rock at any time of loading which relates to the technical field of geotechnical engineering. The method includes the following steps: taking a rock sample and trimming on the spot; taking a core of the rock sample by using a core taking machine to form a test piece; obtaining an initial pore volume and an initial volume of the test piece; performing a triaxial compression test on the test piece, and obtaining axial radical stress strain data of the test piece during a process from starting of the test to fracture; drawing a axial radical stress strain curve graph of the test piece, and eliminating abnormal values in the curve graph; drawing a simple graph of internal pores and a solid matrix of the test piece; and determining theporosity of the test piece at any time of loading. According to the method for determining the porosity of the rock at any time of loading, an indoor test is carried out through on-site sampling; theporosity of the rock at any time of loading can be rapidly determined while a basic rock mechanic test is carried out; the method is convenient and simple; and a computed result is accuracy, so thatthe actual porosity of the rock can be really reflected.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for determining the porosity of rock at any moment of loading. Background technique [0002] In recent years, with the increasing social economy, people's demand for mineral resources and the development of science and technology, the depth of mineral mining has also continued to increase. How to safely and efficiently carry out deep mining of mineral resources has become an important issue related to the rapid economic development of our country. Deep rock mass is usually in the state of high ground stress, high temperature, and high seepage flow field, and its mechanical properties are different from those of rock and soil materials under low stress state: ① not only soft rock shows obvious rheological properties, but also Moreover, hard rocks like granite also have rheological effects; ② under low confining pressure, they generally obey the linear roc...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N15/08
CPCG01N3/08G01N15/088G01N2203/0019G01N2203/0256G01N2203/0682
Inventor 郑大为张旭
Owner LIAONING TECHNICAL UNIVERSITY
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