CN115901421A - Rock grouting experiment system - Google Patents
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- CN115901421A CN115901421A CN202211331437.4A CN202211331437A CN115901421A CN 115901421 A CN115901421 A CN 115901421A CN 202211331437 A CN202211331437 A CN 202211331437A CN 115901421 A CN115901421 A CN 115901421A
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Abstract
The invention relates to a rock grouting experiment system which comprises a working frame, six base plates, five loading and unloading assemblies and a grouting assembly, wherein the six base plates form a cubic structure in space, the base plate below is fixedly connected with the working frame, and the rest five base plates can move towards the center close to or far away from the cubic structure; the five loading and unloading assemblies are all arranged on the working frame, the output ends of the five loading and unloading assemblies are respectively connected with the four cushion plates arranged circumferentially and the cushion plate above the five loading and unloading assemblies and used for driving the five cushion plates to move to a first position and a second position, when the five cushion plates move to the first position, two adjacent cushion plates are arranged at intervals to form a non-closed cubic structure, and when the five cushion plates move to the second position, two adjacent cushion plates are abutted to form the cubic structure; the grouting end of the grouting component is communicated with the interior of the cubic structure; the method solves the problem that the grouting, bonding and repairing process of the cracks generated when the rock mass is under different stresses cannot be truly simulated.
Description
Technical Field
The invention relates to the technical field of rock grouting reinforcement experiments, in particular to a rock grouting experiment system.
Background
In the excavation process in mining engineering and rock engineering field, along with the engineering develops to the deep, the stress that the rock mass receives increases gradually, seriously influences the stability of rock mass, and at this moment, the accessible is in order to consolidate to unstable country rock slip casting to guarantee the stability of rock mass. At present, the grouting technology is not perfect, and particularly, the deep rock mass grouting technology needs further intensive research.
Wherein, under the influence of excavation disturbance, the stress state of surrounding rock changes remarkably, namely the multidirectional stress value and the main stress direction tend to differentiate, random cracks can be generated in the internal crushing area, and rock mass bonding reinforcement is carried out by a common grouting method. However, the grouting effect under different stress states is different, so the grouting effect under different stress states needs to be researched, and the best grouting mode is found through experiments.
In the experimental study on the grouting effect of the cracks at the present stage, most of the cracks are formed in a mode of manual molding and arranging macroscopic single cracks in advance, a random crack condition is not formed in a loading and unloading mode, the difference from the actual working condition is obvious, the grouting after unloading can influence the crack development, and the grouting bonding repair process of the cracks generated when the rock mass is under different stresses cannot be truly simulated.
Disclosure of Invention
In view of the above, there is a need to provide a rock grouting experiment system, which is used to solve the problem that the grouting, bonding and repairing process of cracks generated when a rock body is under different stresses cannot be truly simulated.
The invention provides a rock grouting experiment system which comprises a working frame, six base plates, five loading and unloading assemblies and a grouting assembly, wherein the six base plates form a cubic structure in space, the base plate below the six base plates is fixedly connected with the working frame, and the rest five base plates can move towards the center close to or far away from the cubic structure; the five loading and unloading assemblies are all arranged on the working frame, the output ends of the five loading and unloading assemblies are respectively connected with the four cushion plates arranged circumferentially and the cushion plate above the five loading and unloading assemblies and are used for driving the five corresponding cushion plates to move to a first position and a second position, when the five corresponding cushion plates move to the first position, two adjacent cushion plates are arranged at intervals, the six cushion plates form an unsealed cubic structure, when the five corresponding cushion plates move to the second position, the two adjacent cushion plates are abutted, and the six cushion plates form an airtight cubic structure; and the grouting end of the grouting assembly is communicated with the interior of the cubic structure.
Furthermore, the six backing plates comprise a flat plate.
Further, six the backing plate all includes parallel arrangement's a plurality of flat boards, and is a plurality of the flat board is along perpendicular arbitrary one the direction of flat board is arranged in proper order, adjacent two can dismantle the connection between the flat board, and is a plurality of the area of flat board is along being close to the direction of cube structure increases gradually.
Furthermore, the six loading and unloading assemblies respectively comprise an oil cylinder, and the output end of each oil cylinder is connected with the corresponding base plate through a piston.
Furthermore, the oil cylinder is provided with an oil inlet and an oil outlet;
an oil pressure gauge is arranged at an oil inlet and/or an oil outlet of the oil cylinder;
the oil cylinder is characterized by further comprising a displacement sensor and a pressure sensor, wherein the displacement sensor is installed at the output end of the oil cylinder or on the piston, and the pressure sensor is installed between the piston and the backing plate.
Furthermore, the grouting component comprises a grouting pipe, one end of the grouting pipe is externally connected with a grout supply source, and external threads arranged at the other end of the grouting pipe are matched and connected with grouting holes formed in the backing plate and communicated with the inside of the cubic structure.
Furthermore, a grouting pressure gauge, a grouting flowmeter and a flow meter are installed on the grouting pipe.
Further, the slip casting subassembly is still including the storage thick liquid bucket, connecting pipe and the slip casting pump that are linked together in proper order, the splendid attire has the thick liquid that adds the fluorescent agent in the storage thick liquid bucket, the output of slip casting pump with the slip casting pipe is linked together.
Furthermore, the monitoring device also comprises a monitoring component, wherein the monitoring component comprises a data acquisition instrument and a computer terminal, the data acquisition instrument is electrically connected with the displacement sensor and the pressure sensor, and the data acquisition instrument is electrically connected with the computer terminal and is used for electrically connecting and transmitting the displacement sensor and the pressure sensor to the computer terminal.
The stress sensor is arranged in a rock body and is electrically connected with the data acquisition instrument;
the quantity of stress sensor is a plurality of, and a plurality of stress sensor is arranged in the rock mass in matrix array.
Compared with the prior art, six base plates form a cubic structure in space, the base plate below is fixedly connected with a working frame, the other five base plates can move towards the center close to or away from the cubic structure, in order to facilitate the driving of the unfixed five base plates to move, the five loading and unloading assemblies are all installed on the working frame, the output ends of the five loading and unloading assemblies are respectively connected with the four base plates arranged circumferentially and the base plate above, the base plates are used for driving the corresponding five base plates to move to a first position and a second position, when the corresponding five base plates move to the first position, the adjacent two base plates are arranged at intervals, the six base plates form a non-closed cubic structure, a rock body can be placed in the cubic structure from the gaps at the moment, when the corresponding five base plates move to the second position, the adjacent two base plates are abutted, the six base plates form a closed cubic structure, in the process of moving from the first position to the second position corresponding to the five base plates, the inner space of the cubic structure is gradually reduced, the rock body is extruded until the rock body is crushed, the environment for really reducing the rock body is generated by the actual reduction of the generation environment of the rock body, the crack restoration, the grouting stress generated by the grouting assembly, the slurry injection is respectively applied to the crack restoration process under the corresponding to the crack restoration, and the crack of the corresponding six base plates, the grouting stress restoration, the crack restoration of the grouting assembly, and the crack restoration process of the crack generation of the rock body is generated under the grouting process.
Drawings
Fig. 1 is a schematic structural diagram of an entirety of a rock grouting experiment system provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a backing plate in a rock grouting experiment system provided by an embodiment of the invention;
fig. 3 is an overall schematic top view of a rock grouting experiment system according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a grouting pipe in the rock grouting experiment system according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a grouting assembly in a rock grouting experiment system according to an embodiment of the invention;
fig. 6 is a schematic view of installation of a stress sensor in a rock grouting experiment system provided by an embodiment of the invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
As shown in fig. 1, the rock grouting experiment system provided by the invention comprises a work frame 100, six tie plates 200, five loading and unloading assemblies 300 and a grouting assembly 400, wherein the six tie plates 200 form a cubic structure in space, the lower tie plate 200 is fixedly connected with the work frame 100, and the rest five tie plates 200 can move towards or away from the center of the cubic structure; the five loading and unloading assemblies 300 are all arranged on the working frame 100, the output ends of the five loading and unloading assemblies 300 are respectively connected with the four cushion plates 200 arranged circumferentially and the cushion plates 200 arranged above the four cushion plates 200 and used for driving the corresponding five cushion plates 200 to move to a first position and a second position, when the corresponding five cushion plates 200 move to the first position, two adjacent cushion plates 200 are arranged at intervals, six cushion plates 200 form a non-closed cubic structure, when the corresponding five cushion plates 200 move to the second position, two adjacent cushion plates 200 are abutted, and six cushion plates 200 form a closed cubic structure; the grouting end of the grouting assembly 400 is communicated with the interior of the cubic structure.
In this embodiment, six pads 200 are formed in a cubic structure in space, six pads 200 can move toward or away from the center of the cubic structure, the lower pad 200 is fixedly connected to the work frame 100, in order to facilitate the movement of the five unfixed backing plates 200, the five loading and unloading assemblies 300 are all mounted on the working frame 100, the output ends of the five loading and unloading assemblies 300 are respectively connected with the four backing plates 200 arranged circumferentially and the backing plate 200 above, so as to drive the five backing plates 200 to move to the first position and the second position, when the corresponding five tie plates 200 are moved to the first position, two adjacent tie plates 200 are spaced apart from each other, and the six tie plates 200 form an unsealed cubic structure, the rock mass 600 can be placed in the cubic structure from the gap, when the corresponding five base plates 200 are moved to the second position, two adjacent base plates 200 are abutted, and the six base plates 200 form a closed cubic structure, in the process that the corresponding five base plates 200 move from the first position to the second position, the internal space of the cubic structure is gradually reduced, the base plates press the rock body 600 until the rock body 600 is crushed, so as to truly reduce the generation environment of cracks of the rock body 600, the corresponding five tie plates 200 are continuously moved to the second position until the adjacent two tie plates 200 are abutted to form a closed cubic structure, at this time, the six tie plates 200 respectively apply stress to the rock mass from six directions, at this time, the process that random cracks are generated in the rock mass 600 under the influence of excavation disturbance is completed, the bearing plate 200 in the corresponding direction is unloaded according to the stress surface of the rock body 600, and is communicated with the inside of the cubic structure through the grouting end of the grouting assembly 400 to bond and reinforce the rock body 600, thereby truly simulating the grouting repair process of the cracks generated when the rock mass 600 is under different stresses.
The work frame 100 in this embodiment is a structure supporting six pallets 200 and five loading and unloading assemblies 300. Specifically, the relative positions of the six tie plates 200 are adjusted by the five loading and unloading assemblies 300 mounted on the work frame 100.
In one embodiment, the work frame 100 includes a vertical frame 110 and a horizontal frame 120, two loading and unloading assemblies 300 are respectively installed on the inner top wall and the inner bottom wall of the vertical frame 110, and the remaining four loading and unloading assemblies 300 are uniformly arranged along the circumference of the horizontal frame 120. In order to adjust the relative position between the six base plates 200, the vertical frame 110 is provided with a plurality of threaded holes along the vertical direction, the horizontal frame 120 can be in threaded connection with any threaded hole in the vertical frame 110 through a fixing bolt, and the vertical height of the vertical frame 110 can be adjusted by connecting the horizontal frame 120 with threaded holes with different vertical heights, so that the vertical heights of the four loading and unloading assemblies 300 which are circumferentially arranged are adjusted.
Of course, in other embodiments, the work frame 100 may be replaced by other structures, as long as the five loading and unloading assemblies 300 are stably installed, and the five base plates 200 connected to the output ends of the five loading and unloading assemblies 300 form the cubic structure.
The six tie plates 200 in this embodiment are structures simulating the environment in which the rock mass 600 is located, that is, the rock mass 600 is fractured by the extrusion of the six tie plates 200 in six directions, so as to simulate the environment in which the deep rock mass 600 is fractured due to the stress applied thereto under the excavation disturbance. Specifically, six of the plurality of tie plates 200 are spatially arranged to form a cubic structure, the lower tie plate 200 is fixedly connected to the work frame 100, and the remaining five tie plates 200 are movable toward or away from the center of the cubic structure.
In one embodiment, six pads 200 each comprise a flat plate 210.
As shown in fig. 2, in order to adapt to the stress requirements of rock masses 600 with different volumes and shapes, in one embodiment, each of the six tie plates 200 includes a plurality of flat plates 210 arranged in parallel, the plurality of flat plates 210 are sequentially arranged in a direction perpendicular to any one of the flat plates 210, two adjacent flat plates 210 are detachably connected, and the areas of the plurality of flat plates 210 gradually increase in a direction approaching the cubic structure.
Wherein, the rock mass 600 is bigger, and the area of the corresponding flat plate 210 is bigger to form the cubic structure of volume, shape and rock mass 600 looks adaptation, simultaneously, the flat plate 210 quantity in the backing plate 200 is more, so that the corresponding loading and unloading subassembly 300 transmits the force to the backing plate 200, and application scope is wide.
The five loading and unloading assemblies 300 in this embodiment are used to drive the tie plate 200 to move and apply six external forces to the rock body 600 in different directions through the tie plate 200. Specifically, five loading and unloading assemblies 300 are all installed on the working frame 100, the output ends of the five loading and unloading assemblies 300 are all connected with the corresponding base plates 200 to drive the six base plates 200 to move to the first position and the second position, when the six base plates 200 move to the first position, the two adjacent base plates 200 are arranged at intervals to form a non-closed cubic structure, and when the six base plates 200 move to the second position, the two adjacent base plates 200 are abutted to form a closed cubic structure.
As shown in FIG. 3, in one embodiment, each of the five loading and unloading assemblies 300 includes a cylinder 310, and the output end of the cylinder 310 is connected to the corresponding pad 200 via a piston 311. The oil cylinder 310 has an oil inlet 320 and an oil outlet 330, and the movement position of the control piston 311 of the oil cylinder 310 is adjusted by controlling the oil inlet 320 and the oil outlet 330. In order to facilitate the detection of whether the oil cylinder 310 works normally, an oil pressure gauge 340 is installed at the oil inlet 320 and/or the oil outlet 330 of the oil cylinder 310.
In order to facilitate the understanding of the compression of the rock mass 600, in one embodiment, a displacement sensor 350 and a pressure sensor 360 are further included, the displacement sensor 350 is installed on the output end of the cylinder 310 or the piston 311, and the pressure sensor 360 is installed between the piston 311 and the pad 200.
The grouting assembly 400 in this embodiment is used for the construction of an inner grouting of a pair of cubic structures.
As shown in fig. 4, in one embodiment, the grouting assembly 400 includes a grouting pipe 410, one end of the grouting pipe 410 is externally connected to a grouting source, and an external thread 411 provided at the other end of the grouting pipe 410 is fittingly connected to the grouting hole 220 formed in the pad 200 and is communicated with the inside of the cubic structure.
To facilitate control of the grouting pressure and grouting flow, in one embodiment, a grouting pressure gauge, a grouting flow meter, and a flow rate meter 413 are installed on the grouting pipe 410.
As shown in fig. 5, the grouting assembly 400 further includes a slurry storage barrel 420, a connecting pipe 430 and a grouting pump 440, which are sequentially communicated, wherein the slurry storage barrel 420 contains slurry with fluorescent agent added therein, and an output end of the grouting pump 440 is communicated with the grouting pipe 410. Through the thick liquid that sets up the interpolation fluorescent agent to follow-up behind cutting rock mass 600, know the diffusion information of slip casting in-process thick liquid.
In order to facilitate centralized processing of the values of the displacement sensor 350 and the pressure sensor 360, the present embodiment further includes a monitoring component 500, the monitoring component 500 includes a data acquisition instrument 510 and a computer terminal 520, the data acquisition instrument 510 is electrically connected with the displacement sensor 350 and the pressure sensor 360, the data acquisition instrument 510 is electrically connected with the computer terminal 520, so as to electrically connect and transmit the displacement sensor 350 and the pressure sensor 360 to the computer terminal 520, and the computer terminal 520 is convenient for real-time viewing of the values of the displacement sensor 350 and the pressure sensor 360.
As shown in fig. 6, in one embodiment, a stress sensor 610 is further included, the stress sensor 610 is embedded in the rock mass 600, and the stress sensor 610 is electrically connected to the data acquisition instrument 510, so as to know the stress condition inside the rock mass 600.
It should be noted that the rock mass 600 in the embodiment of the present invention obtains a structure similar to the mechanical properties of a rock sample by a manual casting method, and during casting, the stress sensor 610 may be installed inside the rock mass 600 in a pre-embedded manner, so as to avoid the stress sensor 610 from affecting the mechanical properties of the rock mass 600.
In one embodiment, the number of stress sensors 610 is a plurality, and a plurality of stress sensors 610 are arranged in a matrix array in the rock mass 600.
In another embodiment, a cube is selected at one corner of the rock mass 600, three sets of twelve stress sensors 610 are arranged in a pre-buried manner, each set includes four stress sensors 610, the position of the first set of stress sensors 610 is selected from the exposed side surface of the selected cube, the four stress sensors 610 in the first set are arranged at the midpoint position of the connecting line of the center of the plane where the stress sensors are located and the four vertexes, the second set of stress sensors 610 is selected from the position of the center plane of the selected rock mass 600, the plane is parallel to the plane where the first set of stress sensors are located, the four stress sensors 610 in the second set are arranged in the same manner as the first set, the third set of stress sensors are arranged in the inner plane corresponding to the first set, and the arrangement position of each sensor is the same as that of the first set. Then, each stress sensor 610 is connected to the data acquisition instrument 510 and collected to the computer terminal 520 to detect the stress-strain condition inside the rock sample.
The following is a grouting experiment for rock mass 600 under different stress environments.
The first embodiment is as follows: the simulated environment is that the rock mass 600 to be grouted is not exposed, and at the moment, the rock mass 600 is in a six-direction stress state.
1) Preparation: the rock mass 600 embedded with the stress sensor 610 is placed on the base plate 200 below, the horizontal frame 120 is adjusted to a proper position, the horizontal frame is fixed to the vertical frame 110 through bolts, the installation position of the oil cylinder 310 is determined, the piston 311 is fixed through a piston 311 positioning groove formed in the base plate 200, the piston 311 props against the base plate 200, and the piston 311 pushes the base plate 200 to slowly approach the rock mass 600 and cling to the surface of the rock mass 600 through the oil cylinder 310.
2) An initial loading process: the oil pressure of the oil cylinder 310 in each direction is adjusted to load at a certain loading rate until the loads in six directions reach preset values, the rock body 600 is fractured, the load is kept stable, and the change conditions of all directions of displacement and load and the internal stress condition of the rock body 600 are detected through the displacement sensor 350, the pressure sensor 360 and the stress sensor 610 in the rock body 600.
3) Grouting: under the unchangeable condition of holding the load, the rotatory mode of cramping is connected with the external screw thread 411 of slip casting pipe 410 through the slip casting hole 220 of backing plate 200, guarantee that slip casting pipe 410 passes backing plate 200 and slip casting pipe 410 front end squeezes into 2cm on the rock mass 600 surface, adopt dust extraction to clear away the broken rock mass in slip casting pipe 410 totally, connect slip casting pipe 410 and grouting pump 440, open storage bucket 420, with adding the thick liquid pump that has the fluorescent agent in slip casting pump 440, and with the inside of certain pressure gradient with thick liquid injection cube structure, can be through the slip casting manometer simultaneously, slip casting flow meter 412 and current meter, come regulation and control slip casting pressure and flow.
4) Stopping grouting: after the grouting pressure reaches a certain value, stopping grouting, closing a grouting valve arranged on the grouting pipe 410, and then closing the grouting pump 440 and the slurry storage barrel 420.
5) Unloading after grouting: after grouting is finished, load is kept for a period of time until injected grout is solidified and stable, pressure relief is started, oil outlets 330 of the six oil cylinders 310 are opened synchronously, slow unloading is started, the piston 311 is retracted, the base plate 200 is taken down and arranged for later use, and then the grouted rock mass 600 is taken out.
6) Extracting slurry diffusion information: the rock mass 600 taken out is cut into sheets according to a certain distance on the placing platform, the distribution condition of the fluorescent agent in each sheet-shaped grouting test piece is collected by a fluorescence detector, and the recorded information is transmitted to the computer terminal 520 for processing the diffusion data of the grout.
7) Arranging an experimental device: cleaning and arranging the used device, and putting the device for standby.
Example two: the simulated environment is that only one face of the rock mass 600 to be grouted is exposed, and at the moment, the rock mass 600 is in a five-direction stress state:
1) Preparation: the rock mass 600 with the pre-embedded stress sensor 610 is placed on the base plate 200 below, the horizontal frame 120 is adjusted to a proper position, the horizontal frame is fixed to the vertical frame 110 through bolts, the installation position of the oil cylinder 310 is determined, the piston 311 is fixed through a piston 311 positioning groove formed in the base plate 200, the piston 311 is enabled to abut against the base plate 200, and the piston 311 enables the base plate 200 to be pushed by the oil cylinder 310 to slowly approach the rock mass 600 and to be tightly attached to the surface of the rock mass 600.
2) An initial loading process: the oil pressure of the oil cylinder 310 in each direction is adjusted to load at a certain loading rate until the loads in six directions reach preset values, the rock body 600 is fractured, the load is kept stable, and the change conditions of all directions of displacement and load and the internal stress condition of the rock body 600 are detected through the displacement sensor 350, the pressure sensor 360 and the stress sensor 610 in the rock body 600.
3) Grouting: under the condition of keeping the load unchanged, an oil outlet 330 of an oil cylinder 310 in any direction is opened, a piston 311 in the direction drives a corresponding base plate 200 to move towards the direction far away from the cubic structure until the cover surface of a rock mass 600 leaks outwards, the direction is the leakage surface of the rock mass 600, grouting is performed from the leakage surface of the rock mass 600 at the moment, drilling is performed on the rock mass 600, one end of a grouting pipe 410 is rotated and pressed into a hole of the rock mass 600 to a depth of 5cm by using pressure, the leakage can be prevented, the other end of the grouting pipe 410 is connected with a grouting pump 440, a grouting barrel 420 is opened, the grouting pump with the fluorescent agent added is pumped into the grouting pump 440, the grouting is injected into the cubic structure at a certain pressure gradient, and the grouting pressure and flow can be regulated and controlled by a grouting pressure gauge, a grouting flow meter 412 and a flow meter.
4) Stopping grouting: after the grouting pressure reaches a certain value, stopping grouting, closing a grouting valve arranged on the grouting pipe 410, and then closing the grouting pump 440 and the slurry storage barrel 420.
5) Unloading after grouting: after grouting is finished, load is kept for a period of time until injected grout is solidified stably, pressure relief is started, oil outlets 330 of the other five oil cylinders 310 are opened synchronously, slow unloading is started, the piston 311 is retracted, the base plate 200 is taken down and arranged for later use, and then the grouted rock body 600 is taken out.
6) Extracting slurry diffusion information: the rock mass 600 taken out is cut into sheets according to a certain distance on the placing platform, the distribution condition of the fluorescent agent in each sheet-shaped grouting test piece is collected by a fluorescence detector, and the recorded information is transmitted to the computer terminal 520 for processing the diffusion data of the grout.
7) Arranging an experimental device: cleaning and arranging the used device, and putting the device for standby.
Compared with the prior art: the six base plates 200 form a cubic structure in space, the lower base plate 200 is fixedly connected with the work frame 100, the other five backing plates 200 can move towards the center of the cubic structure or away from the center of the cubic structure, in order to facilitate the movement of the unfixed five backing plates 200, the five loading and unloading assemblies 300 are all installed on the working frame 100, the output ends of the five loading and unloading assemblies 300 are respectively connected with the four backing plates 200 arranged circumferentially and the backing plate 200 above the four backing plates 200 and are used for driving the corresponding five backing plates 200 to move to the first position and the second position, when the corresponding five tie plates 200 are moved to the first position, two adjacent tie plates 200 are spaced apart from each other, and the six tie plates 200 form an unsealed cubic structure, the rock mass 600 can be placed in the cubic structure from the gap, when the corresponding five base plates 200 are moved to the second position, two adjacent base plates 200 are abutted, and the six base plates 200 form a closed cubic structure, in the process that the corresponding five base plates 200 move from the first position to the second position, the internal space of the cubic structure is gradually reduced, the base plates press the rock body 600 until the rock body 600 is crushed, so as to truly reduce the generation environment of cracks of the rock body 600, the corresponding five tie plates 200 are continuously moved to the second position until the adjacent two tie plates 200 are abutted to form a closed cubic structure, and at this time, the six tie plates 200 respectively apply stress to the rock mass from six directions, at this time, the process that random cracks are generated in the rock mass 600 under the influence of excavation disturbance is completed, the bearing plate 200 in the corresponding direction is unloaded according to the stress surface of the rock body 600, and is communicated with the inside of the cubic structure through the grouting end of the grouting assembly 400 to bond and reinforce the rock body 600, thereby truly simulating the grouting repair process of the cracks generated when the rock mass 600 is under different stresses.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (10)
1. A rock grouting experiment system is characterized by comprising a working frame, six base plates, five loading and unloading assemblies and a grouting assembly;
the six base plates form a cubic structure in space, the base plate below is fixedly connected with the working frame, and the rest five base plates can move towards the position close to or far away from the center of the cubic structure;
the five loading and unloading assemblies are all arranged on the working frame, the output ends of the five loading and unloading assemblies are respectively connected with the four base plates arranged circumferentially and the base plate above the five loading and unloading assemblies and are used for driving the corresponding five base plates to move to a first position and a second position, when the corresponding five base plates move to the first position, two adjacent base plates are arranged at intervals, six base plates form a non-closed cubic structure, when the corresponding five base plates move to the second position, two adjacent base plates are abutted, and six base plates form a closed cubic structure;
and the grouting end of the grouting assembly is communicated with the interior of the cubic structure.
2. The rock grouting experiment system of claim 1, wherein six of the tie plates each comprise a flat plate.
3. The rock grouting experiment system of claim 1, wherein the six base plates each comprise a plurality of flat plates arranged in parallel, the flat plates are sequentially arranged in a direction perpendicular to any flat plate, two adjacent flat plates are detachably connected, and the areas of the flat plates are gradually increased in a direction close to the cubic structure.
4. The rock grouting experiment system of claim 1, wherein each of the five loading and unloading assemblies comprises an oil cylinder, and an output end of each oil cylinder is connected with the corresponding pad plate through a piston.
5. The rock grouting experiment system of claim 4, wherein the oil cylinder has an oil inlet and an oil outlet;
an oil pressure gauge is arranged at an oil inlet and/or an oil outlet of the oil cylinder;
the oil cylinder is characterized by further comprising a displacement sensor and a pressure sensor, wherein the displacement sensor is installed at the output end of the oil cylinder or on the piston, and the pressure sensor is installed between the piston and the base plate.
6. The rock grouting experiment system of claim 1, wherein the grouting assembly comprises a grouting pipe, one end of the grouting pipe is externally connected with a grouting source, and an external thread arranged at the other end of the grouting pipe is matched and connected with a grouting hole formed in the backing plate and communicated with the inside of the cubic structure.
7. The rock grouting experiment system of claim 6, wherein a grouting pressure gauge, a grouting flow meter and a flow velocity meter are mounted on the grouting pipe.
8. The rock grouting experiment system of claim 6, wherein the grouting assembly further comprises a grouting barrel, a connecting pipe and a grouting pump which are sequentially communicated, the grouting barrel is filled with slurry added with a fluorescent agent, and the output end of the grouting pump is communicated with the grouting pipe.
9. The rock grouting experiment system of claim 5, further comprising a monitoring component, wherein the monitoring component comprises a data acquisition instrument and a computer terminal, the data acquisition instrument is electrically connected with the displacement sensor and the pressure sensor, and the data acquisition instrument is electrically connected with the computer terminal and is used for transmitting the electrical connection between the displacement sensor and the pressure sensor to the computer terminal.
10. The rock grouting experiment system of claim 9, further comprising a stress sensor, wherein the stress sensor is arranged in the rock body and is electrically connected with the data acquisition instrument;
the quantity of stress sensor is a plurality of, and a plurality of stress sensor is arranged in the rock mass in matrix array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211331437.4A CN115901421A (en) | 2022-10-28 | 2022-10-28 | Rock grouting experiment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211331437.4A CN115901421A (en) | 2022-10-28 | 2022-10-28 | Rock grouting experiment system |
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| CN115901421A true CN115901421A (en) | 2023-04-04 |
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| CN202211331437.4A Pending CN115901421A (en) | 2022-10-28 | 2022-10-28 | Rock grouting experiment system |
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2022
- 2022-10-28 CN CN202211331437.4A patent/CN115901421A/en active Pending
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