Rock mechanical behavior test and analysis method based on quasi-real deep in-situ sample
A technique of rock mechanics, testing methods, applied in the direction of testing material strength using applied stable tension/pressure, material analysis using wave/particle radiation, analyzing materials, etc.
Pending Publication Date: 2022-07-26
SICHUAN UNIV
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Many scholars generally agree that the internal stress of rock exists objectively, and that the internal stress has a non-negligible impact on the mechanical properties of rock. However, how to quantitatively analyze the influence of internal stress on the mechanical behavior of rock is still the bottleneck of current scientific research.
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[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.
[0035] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall ...
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Abstract
The invention relates to a rock mechanical behavior test and analysis method based on a real-simulated deep in-situ sample, which comprises the following steps: measuring ground stress to obtain three-dimensional stress of a stratum, then applying the three-dimensional stress to the real-simulated deep in-situ sample by virtue of a true triaxial testing machine, stably loading the maximum principal stress at a certain loading rate until the sample is damaged, and finally obtaining the rock mechanical behavior of the real-simulated deep in-situ sample. Obtaining a stress-strain curve of the sample; calculating parameters such as closing stress, crack initiation stress, damage stress, peak stress, residual stress, elastic modulus, Poisson's ratio, internal friction angle and cohesive force, and quantitatively analyzing the influence of internal stress on mechanical properties and deformation characteristics of rocks by using a data standardization method. The in-situ mechanical test is carried out on rock-like materials with different internal stress, the difference between the mechanical properties and deformation characteristics of rocks with different internal stress characteristics can be obtained by comparing the rock mechanical behaviors of deep in-situ samples, and the essential characteristics of the internal stress can be obtained.
Description
technical field [0001] The invention relates to the technical field of rock mechanics experiments, in particular to a rock mechanics behavior test and analysis method based on a simulated deep in-situ sample. Background technique [0002] A rock is a solid aggregate of one or several minerals with a stable shape. A rock composed of one mineral is called a single ore rock. For example, marble is composed of calcite, and quartzite is composed of quartz. Composition, Gabbro is composed of basic plagioclase and pyroxene and so on. Different types of rocks have different diagenetic processes, and their heterogeneity and incompatibility make rocks inevitably form a certain internal stress under the earth's geological action. [0003] There have been many discussions and discussions on rock internal stress in the prior art, but since rock internal stress is formed during the construction and transformation of rock itself, the complexity of rock internal stress leads to its resear...
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IPC IPC(8): G01N33/24G01N3/08G01N23/207G01N15/02
CPCG01N33/24G01N3/08G01N23/207G01N15/02
Inventor 李飞高明忠谢晶杨本高刘军军郝海春叶思琪邓虎超王轩
Owner SICHUAN UNIV