CN114078356A - Modularized prefabricated crack grouting experiment device and method - Google Patents
Modularized prefabricated crack grouting experiment device and method Download PDFInfo
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- CN114078356A CN114078356A CN202111299656.4A CN202111299656A CN114078356A CN 114078356 A CN114078356 A CN 114078356A CN 202111299656 A CN202111299656 A CN 202111299656A CN 114078356 A CN114078356 A CN 114078356A
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- 238000002474 experimental method Methods 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 17
- 239000002002 slurry Substances 0.000 claims abstract description 89
- 238000004088 simulation Methods 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000002699 waste material Substances 0.000 claims description 13
- 238000004537 pulping Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
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- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
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- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a modularized prefabricated crack grouting experimental device which comprises a base, a slurry supply and recovery unit and a simulation detection unit, wherein the slurry supply and recovery unit and the simulation detection unit are connected and arranged above the base; the simulation detection unit comprises a simulation detection mechanism, the simulation detection mechanism comprises an outer shell, an installation cavity with an open top is arranged in the outer shell, a rotating shaft is arranged on the side wall of the outer shell, and the rotating shaft is connected with a supporting mechanism arranged on the base and drives the simulation detection mechanism to rotate; a base plate is arranged on the bottom plate of the mounting cavity, and a plurality of slots with open tops are vertically distributed on the base plate; a limiting block which can be spliced with the slot and the flow guide block are matched with each other in a splicing manner to form a flow guide crack channel on the upper surface of the substrate; the inlet of the diversion fracture channel is connected with the slurry supply and recovery unit through the slurry conveying pipeline, the outlet of the diversion fracture channel is connected with the slurry supply and recovery unit through the slurry backflow pipeline, and an operator can observe the flowing path and state of the slurry in the simulation detection mechanism along the diversion fracture channel.
Description
Technical Field
The invention belongs to the technical field of grouting experiments, and particularly relates to a modularized precast crack grouting experiment device and method.
Background
At present, a large number of experiments are developed for treating subsidence areas in China, wherein grouting is a common means for reinforcing weak strata, and is a technology capable of improving the integrity of rock mass and enhancing the strength of surrounding rocks.
The existing crack grouting experiment method needs to prefabricate a crack simulation disc, and has the defects that: the complex fracture simulation disc is complex in manufacturing process, inconvenient to clean after use and difficult to reuse, and material waste and experiment cost are increased.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a modularized prefabricated crack grouting experimental device, and aims to solve the technical problems that a complex crack simulation disc is complex in manufacturing process, inconvenient to clean after being used and difficult to reuse in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a modularized precast crack grouting experiment device comprises a base, a slurry supply and recovery unit and a simulation detection unit, wherein the slurry supply and recovery unit and the simulation detection unit are connected and arranged above the base;
the simulation detection unit comprises a simulation detection mechanism, the simulation detection mechanism comprises an outer shell, an installation cavity with an open top is arranged in the outer shell, rotating shafts are arranged at opposite positions on the side walls of the left side and the right side of the outer shell, and the rotating shafts are connected with a supporting mechanism arranged on the base and used for driving the simulation detection mechanism to rotate; a base plate is arranged on the bottom plate of the mounting cavity, and a plurality of slots with open tops are vertically distributed on the base plate;
the simulation detection mechanism also comprises a limiting block and a flow guide block which can be spliced with the slot, and a pressure detection device is arranged on the flow guide block; the limiting block and the flow guide block are matched on the upper surface of the substrate in a splicing manner to form a flow guide crack channel; the inlet of the diversion fracture channel is connected with the slurry supply and recovery unit through a slurry conveying pipeline, and the outlet of the diversion fracture channel is connected with the slurry supply and recovery unit through a slurry backflow pipeline.
The invention also has the following technical characteristics:
specifically, the thick liquid is supplied with recovery unit and is included the pulping bucket, discharge gate and feed back mouth have been seted up on the pulping bucket, thick liquid pipeline is connected to the discharge gate, the feed back mouth is connected thick liquid backflow pipeline, be provided with the centrifugal pump on the thick liquid pipeline, be provided with the backwash pump on the thick liquid backflow pipeline.
Furthermore, the supporting mechanism comprises a base arranged on the upper surface of the base and two vertical opposite supporting rods arranged on the base, wherein horizontal shaft holes which are transversely communicated are respectively formed in the opposite positions of the upper ends of the supporting rods, the two supporting rods are coaxially arranged in the shaft holes, the supporting rods can be penetrated through the shaft holes by the rotating shaft, and the top end of the rotating shaft is provided with a knob.
Furthermore, the flow guide block comprises a splicing part and a flow guide part which are connected from bottom to top, the lower end of the splicing part is clamped with the slot, the bottom surface area of the flow guide part is smaller than the top surface area of the splicing part, and the shape of the flow guide surface of the flow guide part facing the flow guide crack channel comprises a straight surface, a curved surface, an inclined surface, a combination of the straight surface and the inclined surface which are vertical to the top surface of the splicing part, and a combination of the inclined surface and the inclined surface
Furthermore, the base is also provided with a waste pulp barrel and a clear water barrel, and the clear water barrel is communicated with the pulping barrel through a pipeline.
Furthermore, an angle detector is further arranged on the outer shell and used for detecting an included angle between the simulation detection mechanism and the horizontal plane.
Furthermore, the simulation detection unit further comprises a support column vertically arranged on the top end of the side wall of the outer shell, a camera device is arranged on the support column, an image acquisition end of the camera device faces the simulation detection mechanism and is used for acquiring a flowing image of the slurry in the diversion fissure channel, and an infrared temperature measurement device used for acquiring the temperature of the slurry is further arranged on the support column close to the camera device.
Furthermore, a cover plate is arranged above the outer shell, and a lighting lamp is arranged on the cover plate.
A modularized precast fracture grouting experiment method is realized through the modularized precast fracture grouting experiment device and comprises the following steps:
step 2, constructing a flow guide fracture channel on the substrate by using a flow guide block and a limiting block according to the flow guide fracture channel structure determined in the step 1, and adjusting the inclination angle of the substrate according to the simulated fracture space inclination angle to complete the assembly of the experimental device;
and 4, connecting the return pipe to the waste pulp barrel after the test is finished, and cleaning the device by using clean water after the pulp is discharged.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the invention forms the diversion fracture channels with different shapes by arranging the diversion parts with different shapes and combining the diversion blocks with the limiting blocks to simulate the fractures of the surrounding rock, thereby facilitating the experimenters to simulate the filling process of the slurry for filling, rapidly finishing the simulation by the experimenters, and simultaneously adjusting the angle of the simulation detection mechanism according to the spatial characteristics of a simulation object to ensure that the slurry flows along the diversion fracture channels in the simulation detection mechanism, thereby facilitating the experimenters to observe the flowing path and the state of the slurry.
2. The invention realizes the reutilization of the slurry, is convenient for experimenters to monitor the change of the flowing state caused by the property change of the slurry in the long-time flowing process, and is convenient for cleaning the experimental device.
3. The invention can monitor the flow state of the slurry flowing in the diversion fracture channel by arranging the camera device, and further obtains various parameters such as flow velocity, pressure, temperature and the like, so that the simulation process is visualized, the whole simulation process can be accurately monitored, the judgment basis is provided for real-time simulation control, and meanwhile, the safety and reliability of the whole simulation process are ensured, the operation is proper, and the blindness and uncertainty of the operation are reduced.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of the structure of the apparatus of the present invention;
fig. 3 is a schematic structural diagram of an analog detection mechanism of the device of the present invention.
FIG. 4 is a cross-sectional view of the analog detection mechanism of the device of the present invention.
FIG. 5 is a schematic view of the fracture angle and the fracture gap obtained in example 2 of the present invention.
Reference signs mean:
1-base, 2-slurry supply and recovery unit, 3-simulation detection unit, 4-diversion crack channel, 5-slurry delivery pipeline, 6-slurry reflux pipeline, 7-support mechanism, 8-waste slurry barrel, 9-clear water barrel, 12-angle detector, 13-cover plate and 14-base plate; 21-pulping barrel, 22-centrifugal pump, 23-reflux pump; 31-an analog detection mechanism; 71-base, 72-support bar, 73-knob; 311-outer shell, 312-rotating shaft, 313-limiting block, 314-flow guide block, 315-supporting column, 316-camera device, 317-infrared temperature measuring device, 318-pressure detecting device, 3111-slot, 3141-splicing part and 3142-flow guide part.
The invention is described in detail below with reference to the drawings and the detailed description.
Detailed Description
While the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the following embodiments, and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
As used herein, the terms "upper," "lower," "front," "back," "top," "bottom," and the like are used in an orientation or positional relationship that is indicated for convenience in describing the invention and to simplify the description, but does not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, "inner" and "outer" refer to the inner and outer of the contours of the corresponding parts and are not to be construed as limiting the invention. One side of the main shaft close to the first side plate is a head end, and one side close to the second side plate is a tail end.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that the number of technical features indicated is significant. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, the terms "mounted," "connected," "fixed," and the like are used broadly, and may be, for example, fixedly connected, detachably connected, or integrated without being described to the contrary; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be noted that all the components involved in the present embodiment are components that can be obtained by purchasing in the prior art except for specific descriptions.
Example 1
As shown in fig. 2 to fig. 3, the present embodiment provides a grouting experimental apparatus for a modular prefabricated crack, which includes a base 1, and further includes a slurry supply and recovery unit 2 and a simulation detection unit 3, which are connected and disposed above the base 1; the slurry supply and recovery unit 2 is used for supplying slurry to the simulation detection unit 3 and recovering the slurry flowing through the simulation detection unit 3;
the simulation detection unit 3 comprises a simulation detection mechanism 31, the simulation detection mechanism 31 comprises an outer shell 311, an installation cavity with an open top is arranged in the outer shell 311, rotating shafts 312 are arranged at opposite positions on the side walls of the left side and the right side of the outer shell 311, and the rotating shafts 312 are connected with a supporting mechanism 7 arranged on the base 1 and used for driving the simulation detection mechanism 31 to rotate; the installation cavity bottom plate is provided with a base plate 14, and a plurality of slots 3111 with open tops are vertically distributed on the base plate 14.
The simulation detection mechanism 31 further includes a limiting block 313 and a flow guiding block 314 which can be spliced with the slot 3111, and a pressure detection device 318 is arranged on the flow guiding block 314; the limiting block 313 and the guide block 314 are matched with each other in a splicing manner to form a guide crack channel 4 on the upper surface of the substrate 14.
As shown in fig. 2, the slots 3111 are uniformly arranged in an array, and in this embodiment, hexagonal slots are used. Correspondingly, the matching part of the limiting block 313 or the guide block 314 and the slot 3111 is also in a hexagonal structure, one limiting block 313 or one guide block 314 can be inserted into each slot 3111, after the insertion is completed, the side walls of the adjacent limiting block 313 or guide block 314 are abutted against each other, the size of the insertion part of the limiting block 313 or the guide block 314 is matched with that of the slot 3111, and it is ensured that the limiting block 313 or the guide block 314 cannot shake in the slot 3111, so that negligible gaps exist among the adjacent limiting block 313, the limiting block and the guide block 314 after the splicing is completed.
The inlet of the diversion fracture channel 4 is connected with the slurry supply and recovery unit 2 through a slurry conveying pipeline 5, and the outlet of the diversion fracture channel 4 is connected with the slurry supply and recovery unit 2 through a slurry return pipeline 6. The pressure detecting device 318 is used for detecting the flow pressure generated by the slurry flow. The pressure device 318 used in this embodiment is a conventional pressure sensor that is disposed on the flow guide block 314 on the side facing the flow passage.
As a preferable mode of this embodiment, the slurry supply and recovery unit 2 includes a slurry making barrel 21, a discharge port and a return port are provided on the slurry making barrel 21, the discharge port is connected to the slurry conveying pipeline 5, the return port is connected to the slurry return pipeline 6, a centrifugal pump 22 is provided on the slurry conveying pipeline 5, and a return pump 23 is provided on the slurry return pipeline 6. Under the action of the centrifugal pump 22, the slurry in the pulping barrel 21 is sent to the inlet of the diversion fissure channel 4 through the slurry conveying pipeline 5.
As a preferable mode of this embodiment, the supporting mechanism 7 includes a base 71 disposed on the upper surface of the base 1, and further includes two supporting rods 72 vertically disposed on the base in opposite directions, horizontal shaft holes penetrating in the transverse direction are respectively formed in opposite positions of the upper ends of the two supporting rods 72, the two shaft holes are coaxially disposed, the rotating shaft 312 can penetrate through the supporting rods 72 through the shaft holes, and the top end of the rotating shaft 312 is provided with a knob 73. In this embodiment, a rotating shaft 312 passes through the supporting rod 72 via the shaft hole, and the rotating knob 73 can rotate the analog detecting mechanism 31 to adjust the included angle between the analog detecting mechanism 31 and the horizontal plane.
As a preferable mode of this embodiment, the flow guide block 314 includes a splicing portion 3141 and a flow guide portion 3142 that are connected from bottom to top, the lower end of the splicing portion 3141 is clamped with the slot 3111, the area of the bottom surface of the flow guide portion 3142 is smaller than the area of the top surface of the splicing portion 3141, and the shape of the flow guide surface of the flow guide portion 3142 facing the flow guide fracture channel 4 includes a straight surface, a curved surface, an inclined surface, a combination of the straight surface and the inclined surface, and a combination of the inclined surface and the inclined surface that are perpendicular to the top surface of the splicing portion 3141; the flow guide fracture passage 4 with different shapes can be formed by combining surfaces with different shapes perpendicular to the top surface of the splicing part 3141, such as a linear type, an L shape, a U shape, an M shape and the like.
In this embodiment, the vertical distance between the top surface of the diversion portion 3142 and the bottom plate of the outer housing installation cavity is greater than the vertical distance between the top surface of the limit block 313 and the bottom plate of the outer housing installation cavity, so that the diversion slit channel 4 surrounded by the top surface of the limit block 313 and the side wall of the diversion portion 3142 is formed.
As a preferable mode of the embodiment, the pedestal 1 is further provided with a waste pulp barrel 10 and a clear water barrel 11, and the clear water barrel 11 is communicated with the pulping barrel 21 through a pipeline. The clean water tank 31 is used to add clean water to the pulping tank 21. When the number of times of using the aggregate slurry is large or the aggregate slurry is damaged, the aggregate slurry can be poured into the waste slurry barrel 10, after the aggregate slurry is used, the device is cleaned through clear water in the clear water barrel 11, and waste liquid generated after the aggregate slurry is cleaned is discharged into the waste slurry barrel 11.
As a preferable mode of this embodiment, the outer shell 311 is further provided with an angle detector 12, the angle detector 12 is used for detecting an included angle between the simulation detection mechanism 31 and a horizontal plane, and the setting of the included angle can realize the simulation of the flowing state of the slurry in different space environments, such as horizontal flow, inclined flow, and vertical flow.
As a preferable mode of this embodiment, the simulation detecting unit 3 further includes a supporting column 315 vertically disposed at the top end of the side wall of the outer housing 311, a camera 316 is disposed on the supporting column 315, an image collecting end of the camera 316 faces the simulation detecting mechanism 31 for collecting a flowing image of the slurry in the diversion fracture channel 4, and an infrared temperature measuring device 317 for collecting a temperature of the slurry is further disposed on the supporting column 315 near the camera.
In other embodiments, according to the detection requirement, the camera 316 and the infrared temperature measuring device 317 can be selected, or a camera with multiple functions of temperature measurement, photographing, camera shooting, dew point temperature measurement and the like can be selected. For example, the camera 316 may be an l × 718 high-definition compact recorder, or an NV600 infrared night vision device, as long as the data acquisition requirements are met.
As a preferable mode of this embodiment, a cover plate 13 is disposed above the outer shell 311, a lighting lamp is disposed on the cover plate 13, and a clamping groove is further disposed on the bottom surface of the cover plate 13, and the clamping groove can be clamped and connected with the upper portion of the flow guide block 314, so that a sealed cavity is formed in the outer shell 311 and the cover plate 13.
The device of the invention is used as follows:
the stopper 313 and the guide block 314 are installed in the slot 3111 of the substrate 14, the guide slit passage 4 is constructed, the inclination angle of the outer housing 311 is set and detected by the angle detector 12, and then the assembly of the experimental apparatus is completed.
During the experiment, firstly, the centrifugal pump 22 is started to pump the slurry into the diversion fracture channel through the inlet of the diversion fracture channel 4, finally, the slurry enters the slurry backflow pipeline 6 through the outlet of the diversion fracture channel 4 and flows back into the slurry making barrel 21 under the action of the backflow pump 23, the experimental data is recorded in the process, after the experiment is finished, the slurry backflow pipeline 6 is connected to the waste slurry barrel 10, and the device is cleaned by clear water after the waste slurry is discharged.
Example 2
As shown in fig. 1, the present embodiment provides a modular prefabricated crack grouting experiment method, which is implemented by the modular prefabricated crack grouting experiment apparatus disclosed in embodiment 1, and includes the following steps:
the method specifically comprises the following steps: and measuring the size and spatial distribution of gaps in the goaf by using a drilling peeking instrument, grouping according to the crack tendency and the inclination angle, counting the crack spacing, the crack width, the roughness and the filling characteristics of each group, and determining the arrangement of flow guide crack channels according to the counting result.
In this embodiment, two sets of diversion fracture channels are arranged together, and the acquired goaf exploration data is shown in table 1:
TABLE 1 fracture parameters
The inclination and the inclination are projected to the horizontal direction and the vertical direction respectively, the horizontal direction and the vertical direction fracture projection angles are calculated, and a fracture angle and a fracture gap schematic diagram shown in fig. 5 are obtained, wherein a and b represent the included angles between the flow guide fracture channel in the fracture LX1 and the fracture LX2 and the side edge of the experimental device (namely the wide edge of the rectangular experimental device), L1 and L2 represent the widths of the fracture LX1 and the fracture LX2 respectively, and arrows represent the flowing-in direction of the slurry.
Step 2, constructing a flow guide crack channel 4 on the substrate 14 by using a flow guide block 314 and a limiting block 313 according to the flow guide crack channel 4 structure determined in the step 1, and adjusting the inclination angle of the substrate according to the inclination angle of the bottom plate of the subsidence area to complete the assembly of the experimental device;
the arrangement parameters of the vertical and horizontal flow-guiding fracture channels constructed in this example are shown in tables 2 and 3:
TABLE 2 horizontal diversion fracture channel parameter table
TABLE 3 horizontal diversion slit channel parameter table
According to the arrangement, the limiting block 313 and the flow guide block 314 are arranged in the slot 3111 of the substrate 14 to construct a flow guide crack channel, and then the assembly is completed;
the slurry preparation process in the experimental process comprises the following steps: designing an experiment ratio, feeding and pulping into the pulping barrel 31, wherein the feeding sequence is as follows: water, additive, cement, fly ash and aggregate, and then fully stirring.
The flow state, the flow rate and the flow direction of the slurry are recorded through the camera 316, the temperature of the slurry in the test process is collected through the infrared temperature measuring device 317, and the pressure distribution in the slurry filling process is measured through the pressure detecting device 318.
And 4, connecting the return pipe to the waste pulp barrel after the test is finished, and cleaning the device by using clean water after the pulp is discharged.
Clean water is added into the pulping barrel 21, the interior of the experimental device is washed, and then the experimental device is connected with a blowing device after washing, waterlogging is removed, a circuit, a pipeline and a crack simulation disc are disassembled, and the experimental device is stored after detail cleaning.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. A grouting experimental device for a modular prefabricated crack comprises a base (1), and is characterized by further comprising a slurry supply and recovery unit (2) and a simulation detection unit (3) which are connected and arranged above the base (1);
the simulation detection unit (3) comprises a simulation detection mechanism (31), the simulation detection mechanism (31) comprises an outer shell (311), an installation cavity with an open top is arranged in the outer shell (311), rotating shafts (312) are arranged at opposite positions on the side walls of the left side and the right side of the outer shell (311), and the rotating shafts (312) are connected with a supporting mechanism (7) arranged on the base (1) and used for driving the simulation detection mechanism (31) to rotate; a base plate (14) is arranged on the bottom plate of the mounting cavity, and a plurality of slots (3111) with open tops are vertically distributed in the base plate (14);
the simulation detection mechanism (31) further comprises a limiting block (313) and a flow guide block (314) which can be spliced with the slot (3111), and a pressure detection device (318) is arranged on the flow guide block (314); the limiting block (313) and the flow guide block (314) are matched on the upper surface of the base plate (14) in a splicing manner to form a flow guide crack channel (4); the inlet of the diversion fracture channel (4) is connected with the slurry supply and recovery unit (2) through a slurry conveying pipeline (5), and the outlet of the diversion fracture channel (4) is connected with the slurry supply and recovery unit (2) through a slurry return pipeline (6).
2. The modular precast crack grouting experiment device according to claim 1, wherein the slurry supply and recovery unit (2) comprises a slurry making barrel (21), a discharge port and a return port are formed in the slurry making barrel (21), the discharge port is connected with a slurry conveying pipeline (5), the return port is connected with a slurry return pipeline (6), a centrifugal pump (22) is arranged on the slurry conveying pipeline (5), and a return pump (23) is arranged on the slurry return pipeline (6).
3. The modular precast crack grouting experiment device according to claim 1, characterized in that the supporting mechanism (7) comprises a base (71) arranged on the upper surface of the base (1), and further comprises two supporting rods (72) vertically and oppositely arranged on the base (71), horizontal shaft holes which penetrate along the transverse direction are respectively formed in the opposite positions of the upper ends of the two supporting rods (72), the two shaft holes are coaxially arranged, the rotating shaft (312) can penetrate out of the supporting rods (72) through the shaft holes, and a knob (73) is arranged at the top end of the rotating shaft (312).
4. The modular prefabricated crack grouting experiment device as claimed in claim 1, wherein the flow guide block (314) comprises a splicing part (3141) and a flow guide part (3142) which are connected from bottom to top, the lower end of the splicing part (3141) is clamped with the slot (3111), the bottom surface area of the flow guide part (3142) is smaller than the top surface area of the splicing part (3141), and the shape of the flow guide surface of the flow guide part (3142) facing the flow guide crack channel (4) comprises a straight surface, a curved surface, an inclined surface, a combination of the straight surface and the inclined surface and a combination of the inclined surface and the curved surface which are perpendicular to the top surface of the splicing part (3141).
5. The modular precast crack grouting experiment device according to claim 1, characterized in that a waste slurry barrel (7) and a clear water barrel (8) are further arranged on the base (1), and the clear water barrel (8) is communicated with the pulping barrel (21) through a pipeline.
6. The modular prefabricated crack grouting experiment device as claimed in claim 1, wherein an angle detector (12) is further arranged on the outer shell (311), and the angle detector (12) is used for detecting an included angle between the analog detection mechanism (31) and a horizontal plane.
7. The modular precast crack grouting experiment device according to claim 1, wherein the simulation detection unit (3) further comprises a supporting column (315) vertically arranged at the top end of the side wall of the outer shell (311), a camera device (316) is arranged on the supporting column (315), an image acquisition end of the camera device (316) faces the simulation detection mechanism (31) and is used for acquiring a flowing image of the slurry in the diversion crack channel (4), and an infrared temperature measurement device (317) used for acquiring the temperature of the slurry is further arranged on the supporting column (315) close to the camera device (316).
8. The modular prefabricated crack grouting experiment device as claimed in claim 1, wherein a cover plate (13) is arranged above the outer shell (311), and an illuminating lamp is arranged on the cover plate (13).
9. A modular prefabricated crack grouting experiment method, which is realized by the modular prefabricated crack grouting experiment device of any one of claims 1 to 8, and comprises the following steps:
the method comprises the following steps:
step 1, acquiring exploration data of a goaf, and determining the structure of a flow guide fracture channel according to the acquired exploration data;
step 2, constructing a flow guide fracture channel on the substrate by using a flow guide block and a limiting block according to the flow guide fracture channel structure determined in the step 1, and adjusting the inclination angle of the substrate according to the simulated fracture space inclination angle to complete the assembly of the experimental device;
step 3, starting a centrifugal pump to pump the slurry into the diversion fracture channel constructed in the step 2, enabling the slurry to flow back into the slurry making barrel through a return pipeline, and collecting and recording experimental data;
and 4, connecting the return pipe to the waste pulp barrel after the test is finished, and cleaning the device by using clean water after the pulp is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299656.4A CN114078356B (en) | 2021-11-04 | 2021-11-04 | Modularized precast crack grouting experimental device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299656.4A CN114078356B (en) | 2021-11-04 | 2021-11-04 | Modularized precast crack grouting experimental device and method |
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