CN218297942U - Rock grouting test device based on multi-field coupling - Google Patents
Rock grouting test device based on multi-field coupling Download PDFInfo
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- CN218297942U CN218297942U CN202220942334.0U CN202220942334U CN218297942U CN 218297942 U CN218297942 U CN 218297942U CN 202220942334 U CN202220942334 U CN 202220942334U CN 218297942 U CN218297942 U CN 218297942U
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Abstract
The utility model provides a rock grouting test device based on multi-field coupling, which comprises a test box, a controller, a grouting module and a liquid injection module; test box overcoat is equipped with the insulation support, be provided with the pressure head in the test box, lower pressure head, preceding pressure head, back pressure head, left side pressure head and right pressure head, the cavity that each pressure head encloses embeds there is the rock core test piece, be equipped with stress transducer in the rock core test piece, each pressure head bottom all is provided with heating module, go up the pressure head, preceding pressure head, back pressure head, all be provided with the slip casting hole in left side pressure head and the right pressure head, be connected with the slip casting module through the slip casting pipeline, be provided with in the lower pressure head and annotate the liquid hole, be connected with the notes liquid module through annotating the liquid pipeline, the slip casting module, annotate the liquid module, heating module and stress transducer are connected with the controller respectively. The utility model discloses really restoreing the slip casting process of rock under the temperature-stress-hydraulic coupling, combining the destruction condition of rock mass and the characteristic of blocking water after the slip casting, provide the foundation for confirming the intensity of rock mass behind the slip casting.
Description
Technical Field
The utility model relates to a rock mechanics technical field, concretely relates to rock slip casting test device based on multi-field coupling.
Background
The multi-fracture rock mass is used as a common geologic body in underground mining engineering, as the geologic action of the geologic body is unbalanced in the whole geological history process, the geologic body presents a multi-block structure to form the multi-fracture rock mass through complex geological processes such as crack inoculation, expansion, re-cementation, re-expansion and the like, and the stability evaluation of the multi-fracture rock mass has important significance for the research on deep stratum water disaster mechanism and the safety control.
The cementing process of the multi-fracture rock mass can be simulated by utilizing a rock grouting test, the dynamic response process of the multi-fracture rock mass is explored, and the mechanical characteristics of the multi-fracture rock mass can be influenced by underground water, ground stress, the type of grouting slurry and temperature field change in the stratum, and the underground water, the ground stress, the type of grouting slurry and the temperature field interact with each other, so that the multi-field coupling of a seepage field, a stress field, a solute migration field and the like in the multi-fracture rock mass is realized. Therefore, it is highly desirable to provide a rock grouting test device based on multi-field coupling, which obtains the damage condition of the rock mass under the action of three-dimensional stress and seepage coupling and the water blocking characteristic of the rock mass after grouting through simulation at different temperatures, thereby providing a basis for determining the change of the strength of the rock mass after grouting and being beneficial to guiding the grouting reinforcement operation of the rock mass.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rock grouting test device based on many field couplings through carrying out true triaxial stress seepage flow coupling experiment to the rock core test piece under different temperature conditions, has realized providing the foundation for confirming the intensity change and the slip casting effect of slip casting back rock mass to the true reduction of temperature-stress-hydraulic coupling effect rock grouting process, is favorable to guiding the slip casting of rock mass and consolidates the operation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a rock grouting test device based on multi-field coupling comprises a test box, a controller, a grouting module and a liquid injection module;
the test box is arranged to be of a box-type frame structure, a heat insulation sleeve is sleeved outside the test box, an upper pressure head, a front pressure head, a rear pressure head, a left pressure head and a right pressure head are correspondingly arranged on the top surface, the front side, the rear side, the left side and the right side of the test box, a lower pressure head is arranged on the bottom surface, a rock core test piece is fixed in a cavity defined by the upper pressure head, the lower pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head, a stress sensor is arranged in the rock core test piece, heating modules are arranged at the bottoms of the upper pressure head, the lower pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head, grouting holes are formed in the upper pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head, the grouting holes are respectively connected with the grouting modules through grouting pipelines, control valves are arranged on the grouting pipelines, and injection holes are formed in the lower pressure head, and are connected with the injection modules through the grouting pipes;
the grouting module, the liquid injection module, the heating module and the stress sensor are respectively connected with the controller.
Preferably, go up pressure head, lower pressure head, preceding pressure head, back pressure head, left pressure head and right pressure head swing joint respectively on the test box.
Preferably, the grouting module comprises a slurry storage tank and a grouting booster pump, and the liquid injection module comprises a water storage tank and a liquid injection booster pump.
Preferably, the heating temperature of the heating module is higher than 150 ℃, a plurality of main electric heating pipes and auxiliary electric heating pipes are arranged in the heating module, the main electric heating pipes are arranged in parallel, and the main electric heating pipes and the auxiliary electric heating pipes are of an integrated structure.
Preferably, the electric heating auxiliary pipe is provided as a special pipe.
The utility model discloses the beneficial technological effect who brings:
the utility model provides a rock slip casting test device based on many field couplings, the device has not only realized the indoor simulation to rock mass place stratum environment, still through applying the confined pressure to the rock core test piece, the axial compression three-dimensional stress, the water pressure seepage flow is applyed in the cooperation, the temperature-three-dimensional stress-seepage flow coupling to the rock mass structural plane has been realized, the slip casting process of broken rock mass has been simulated, truly reflected the rock mass at the temperature, the three-dimensional stress and the water blocking characteristic of the rock mass after the slip casting under the seepage flow coupling effect, provide the foundation for accurately evaluating the rock mass intensity after the slip casting.
Drawings
Fig. 1 is the utility model relates to a rock grouting test device's structural schematic based on many field couplings.
Fig. 2 is a front view of the test box of the present invention.
Fig. 3 is a top view of the test box of the present invention.
Fig. 4 is a cross-sectional view of the test box of the present invention along the line C-C.
Fig. 5 is a schematic structural diagram of the heating module of the present invention.
In the figure, 1, a controller, 2, a test box, 3, a grouting booster pump, 4, a slurry storage tank, 5, a liquid injection booster pump, 6, a water storage tank, 7, an upper pressure head, 8, a lower pressure head, 9, a left pressure head, 10, a right pressure head, 11, a front pressure head, 12, a rear pressure head, 13, a heat preservation sleeve, 14, a rock core test piece, 15, an electric heating main pipe, 16 and an electric heating auxiliary pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model relates to a rock slip casting test device based on many field couplings, as shown in figure 1, including test box 2, controller 1, slip casting module and notes liquid module.
The test box 2 is arranged in a box-type frame structure, as shown in fig. 2 to 4, a heat insulation sleeve 13 is sleeved outside the test box 2, and the heat insulation sleeve 13 is made of a heat insulation material and used for preventing the reduction of the environmental temperature in the test box; the top surface and preceding, back, a left side, four sides on the right side correspondence of test box 2 are provided with pressure head 7, preceding pressure head 11, back pressure head 12, left side pressure head 9 and right pressure head 10, go up pressure head 7, lower pressure head 8, preceding pressure head 11, back pressure head 12, the cavity internal fixation that left pressure head 9 and right pressure head 10 enclose has the core test piece 14, be provided with stress transducer in the core test piece 14, wherein, it is used for applying the axle load for the core test piece to go up pressure head 7, lower pressure head 8 is used for applying water pressure for the core test piece, preceding pressure head 11, back pressure head 12, left side pressure head 9 and right pressure head 10 are used for applying the confining pressure for the core test piece. Go up the pressure head 7, preceding pressure head 11, back pressure head 12, all be provided with the slip casting hole that is arranged in to the slip casting in the core test piece in left side pressure head 9 and the right pressure head 10, each slip casting hole is connected with slip casting booster pump 3 and the thick liquid storage tank 4 of slip casting module in proper order through the slip casting pipeline respectively, be provided with the control valve on the slip casting pipeline for the injection of thick liquid in each pressure head of control, be provided with the notes liquid hole that is arranged in to the core test piece water injection in the lower pressure head 8, it is connected with notes liquid booster pump 5 and the water storage tank 6 of annotating the liquid module in proper order to annotate the liquid hole through annotating the liquid pipeline.
The bottom of the upper pressure head 7, the bottom of the lower pressure head 8, the front pressure head 11, the rear pressure head 12, the left pressure head 9 and the right pressure head 10 are respectively provided with a heating module, as shown in fig. 5, the heating temperature of the heating module is more than 150 ℃, the interior of the heating module is provided with a plurality of electric heating main pipes 15 and electric heating auxiliary pipes 16 which are arranged in parallel, and the electric heating main pipes 15 and the electric heating auxiliary pipes 16 are of an integrated structure.
The controller 1 is respectively connected with the grouting module, the liquid injection module, the heating module and the stress sensor and is used for controlling the grouting module, the liquid injection module and the heating module and obtaining a measuring result of the stress sensor.
The utility model provides a rock slip casting test device based on many field couplings, its concrete working process includes following step:
step 1, preparing a core test piece 14, wherein the core test piece 14 in this embodiment has a length and a width of 150mm and a height of 300mm, and after the core test piece 14 is soaked in water to a saturated state, placing the core test piece in a cavity surrounded by an upper pressure head 7, a lower pressure head 8, a left pressure head 9, a right pressure head 10, a front pressure head 11 and a rear pressure head 12, wherein the upper pressure head 7, the lower pressure head 8, the left pressure head 9, the right pressure head 10, the front pressure head 11 and the rear pressure head 12 are all tightly attached to the core test piece.
And 2, setting a simulated formation temperature, a confining pressure preset value, a water pressure preset value and an axial pressure preset value according to formation data, controlling the heating temperature of the heating module by using the controller, and heating the core test piece by using each pressure head so that the temperature of the core test piece reaches the simulated formation temperature.
Step 3, extruding the rock core test piece by using a left pressure head 9, a right pressure head 10, a front pressure head 11 and a rear pressure head 12, applying confining pressure to the rock core test piece, controlling the liquid injection module to be started by using the controller 1 when the applied confining pressure value reaches a confining pressure preset value, enabling water flow to enter the test box through the lower pressure head to apply water pressure to the rock core test piece, keeping the water pressure value constant when the applied water pressure value reaches the water pressure preset value, extruding the rock core test piece by using the upper pressure head and the lower pressure head, applying axial pressure to the rock core test piece, and monitoring and simulating the damage condition of the rock core test piece under the three-way stress and seepage coupling action under the formation temperature condition by using a stress sensor when the applied axial pressure value reaches the axial pressure preset value;
and 4, after the core test piece is damaged, keeping the applied confining pressure, axial pressure and water pressure constant, controlling the grouting module to be started by using the controller, and injecting grout into the damaged core test piece through the upper pressure head 7, the left pressure head 9, the right pressure head 10, the front pressure head 11 and the rear pressure head 12 respectively to simulate the grouting process of the rock mass.
And 5, after the grout injected into the rock core test piece is solidified, controlling the grouting module to stop injecting the grout into the rock core test piece by using the controller 1, adjusting the water pressure applied to the rock core test piece by the lower pressure head, and monitoring the water blocking characteristic of the rock core test piece after grouting by using the stress sensor.
And 6, keeping the water pressure applied to the core test piece by the lower pressure head 8 constant, keeping the confining pressure applied to the core test piece by the front pressure head 11, the rear pressure head 12, the left pressure head 9 and the right pressure head 10 constant, changing the axial pressure applied to the core test piece by the upper pressure head 7, determining the strength of the core test piece according to the measurement result of the stress sensor, simulating the strength change of the core test piece after grouting under the conditions that the water pressure and the confining pressure are constant and the axial pressure is changed, and quantitatively analyzing the strength of the core test piece after grouting to provide a basis for accurately determining the strength of the rock mass after grouting and the grouting effect.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (5)
1. A rock grouting test device based on multi-field coupling is characterized by comprising a test box, a controller, a grouting module and a liquid injection module;
the test box is arranged to be of a box-type frame structure, a heat insulation sleeve is sleeved outside the test box, an upper pressure head, a front pressure head, a rear pressure head, a left pressure head and a right pressure head are correspondingly arranged on the top surface, the front side, the rear side and the right side of the test box, a lower pressure head is arranged on the bottom surface, a rock core test piece is fixed in a cavity defined by the upper pressure head, the lower pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head, a stress sensor is arranged in the rock core test piece, heating modules are arranged at the bottoms of the upper pressure head, the lower pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head, grouting holes are formed in the upper pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head, the grouting holes are respectively connected with the grouting modules through grouting pipelines, control valves are arranged on the grouting pipelines, and injection holes are formed in the lower pressure head, and are connected with the grouting modules through the grouting pipelines;
the grouting module, the liquid injection module, the heating module and the stress sensor are respectively connected with the controller.
2. The multi-field coupling based rock grouting test device according to claim 1, wherein the upper pressure head, the lower pressure head, the front pressure head, the rear pressure head, the left pressure head and the right pressure head are movably connected to the test box respectively.
3. The multi-field coupling-based rock grouting test device according to claim 1, wherein the grouting module comprises a slurry storage tank and a grouting booster pump, and the liquid injection module comprises a water storage tank and a liquid injection booster pump.
4. The multi-field coupling-based rock grouting test device as claimed in claim 1, wherein the heating temperature of the heating module is higher than 150 ℃, a plurality of main electric heating pipes and auxiliary electric heating pipes are arranged in the heating module, the main electric heating pipes are arranged in parallel, and the main electric heating pipes and the auxiliary electric heating pipes are in an integrated structure.
5. The multi-field coupling based rock grouting test device according to claim 4, wherein the electric heating auxiliary pipe is provided as a special pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220942334.0U CN218297942U (en) | 2022-04-22 | 2022-04-22 | Rock grouting test device based on multi-field coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220942334.0U CN218297942U (en) | 2022-04-22 | 2022-04-22 | Rock grouting test device based on multi-field coupling |
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| CN218297942U true CN218297942U (en) | 2023-01-13 |
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| CN202220942334.0U Active CN218297942U (en) | 2022-04-22 | 2022-04-22 | Rock grouting test device based on multi-field coupling |
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