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Rock mechanics experiment method with constant power loading
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A constant power, rock mechanics technology, applied in the field of rock mechanics, to achieve the effect of facilitating extensive comparative research
Active Publication Date: 2017-05-31
青岛乾坤兴智能科技有限公司
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[0004] Aiming at the problems existing in the prior art, the present invention provides a rock mechanics experiment method with constant power loading. The method is based on the constant power loading mode, which makes the rock deformation and stress change process more in line with the actual situation, and effectively compensates for the constant rate loading. mode and constant pressure gradient loading mode in the experimental process, it can more accurately reflect the rock deformation law and failure characteristics
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Embodiment 1
[0040] A kind of constant power loading granite double structure plane shear test method, comprises the following steps:
[0041] Step 1: On a 300kN biaxial loading testing machine equipped with a constant rate loading control module and a constant pressure gradient loading control module (the structural diagram is shown in figure 1 As shown), add a constant power loading control module, which is used to control the product of the loading rate and pressure of the indenter of the testing machine per unit time to be a constant value;
[0042] Step 2: Place the granite sample that has been split in Brazil on the biaxial loading testing machine. The size of the granite sample is 100mm×100mm×140mm (length×width×height). , the lower three parts, the thicknesses are 50mm, 40mm, and 50mm respectively; and 4 acoustic emission monitoring probes are installed on the bottom surface of the granite sample, two on the front and back surfaces respectively, such as figure 1 shown;
[0043]St...
Embodiment 2
[0048] A sandstone uniaxial compression experimental method of constant power loading, comprising the following steps:
[0049] Step 1: On a 300kN uniaxial loading testing machine equipped with a constant rate loading control module and a constant pressure gradient loading control module (the structural diagram is shown in Figure 8 As shown), add a constant power loading control module, which is used to control the product of the loading rate and pressure of the indenter of the testing machine per unit time to be a constant value;
[0050] Step 2: Place the sandstone sample on the uniaxial loading testing machine. The size of the sandstone sample is 50mm×50mm×100mm (length×width×height). a, such as Figure 8 shown;
[0051] Step 3: In the vertical direction, gradually apply pressure to the sandstone sample according to a constant pressure gradient of 0.05 mm / s;
[0052] Step 4: When the force on the sandstone sample reaches the set value of 10kN, that is, the loaded power ...
Embodiment 3
[0056] A kind of marble Brazil splitting experimental method of constant power loading, comprises the following steps:
[0057] Step 1: On a 300kN uniaxial loading testing machine equipped with a constant rate loading control module and a constant pressure gradient loading control module (the structural diagram is shown in Figure 15 As shown), add a constant power loading control module, which is used to control the product of the loading rate and pressure of the indenter of the testing machine per unit time to be a constant value;
[0058] Step 2: Place the marble disk sample on the uniaxial loading testing machine. The diameter of the marble disk sample is 80mm and the thickness is 48mm. Install 4 acoustic emission monitoring probes on the surface of the marble sample, two at the front and back, Such as Figure 15 shown;
[0059] Step 3: In the vertical direction, gradually apply pressure to the marble sample according to a constant pressure gradient of 0.015mm / s;
[006...
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Abstract
The invention provides a rock mechanics experiment method with constant power loading. The method comprises the following steps: adding a constant power loading control module on a test machine; installing a rock test sample on the test machine, and installing a sound emission monitoring probe on the surface of the rock test sample; applying pressure to the rock test sample under a constant power loading control mode, and keeping a loading rate at V; when the stress on the rock test sample reaches a set value, i.e. loaded power of the rock test sample reaches P, wherein P is equal to F*V, switching to the constant power loading control mode, while the pressure applied by the test machine to the rock test sample is continuously increased, decreasing the loading rate, always keeping a product of the loading rate and the pressure at a constant value P until the rock test sample is completely damaged, and monitoring and recording pressure and displacement of a pressing head of the test machine and a sound emissionsignal of the rock test sample in the process; and analyzing a breaking rule of the rock test sample according to the pressure and a displacement experiment result of the test machine and the sound emissionsignal data of the rock test sample.
Description
technical field [0001] The invention belongs to the technical field of rock mechanics, and in particular relates to a constant power loading rock mechanics experiment method. Background technique [0002] At present, there are two widely used loading methods for rock mechanics experiments: one is the constant rate loading mode, that is, the displacement of the test machine head is a fixed value per unit time; the other is the constant pressure gradient loading mode, that is, the unit time The increment of the pressure exerted on the rock sample by the indenter of the testing machine is a fixed value. By using these two loading methods to carry out rock mechanics experiments, and quantify and standardize the loading rate and pressure gradient, researchers can obtain a large number of rock basic mechanical parameters that are comparable in the lateral direction, and these mechanical parameters have important reference value for rock engineering construction . However, it is ...
Claims
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