CN113702264B - Simulation arch tunnel aggregate fills water shutoff test device - Google Patents
Simulation arch tunnel aggregate fills water shutoff test device Download PDFInfo
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- CN113702264B CN113702264B CN202111009672.5A CN202111009672A CN113702264B CN 113702264 B CN113702264 B CN 113702264B CN 202111009672 A CN202111009672 A CN 202111009672A CN 113702264 B CN113702264 B CN 113702264B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 238000004088 simulation Methods 0.000 title claims abstract description 103
- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 29
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- 238000007789 sealing Methods 0.000 claims description 13
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims 1
- 239000000945 filler Substances 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 238000013508 migration Methods 0.000 description 7
- 230000005012 migration Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000010412 perfusion Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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Abstract
The invention discloses a test device for simulating aggregate pouring and water plugging of an arch tunnel, which comprises: one end of the water inlet pipe is communicated with an external power water source; the inlet end of the tunnel simulation pipeline is communicated with the other end of the water inlet pipe, wherein the tunnel simulation pipeline is a pipeline with an arched cross section, and the inner wall of the tunnel simulation pipeline has roughness; one end of the water outlet pipe is communicated with the outlet end of the roadway simulation pipeline, and the other end of the water outlet pipe is communicated with the outside; the filler is communicated with the tunnel simulation pipeline, aggregate is arranged in the filler, and the aggregate can be injected into the tunnel simulation pipeline under the action of the filler; the data acquisition system comprises a pressure sensor and a flow monitor; the support system comprises a supporting platform and a plurality of first telescopic devices arranged at the lower end of the supporting platform, and the roadway simulation pipeline is arranged on the supporting platform. The test device can accurately simulate the arch tunnels with different inclination angles, roughness and other working conditions, and is small in test site and easy to operate and disassemble.
Description
Technical Field
The invention relates to the field of indoor simulation tests for governing water inrush disasters of mines, in particular to a test device for simulating aggregate grouting and water plugging of an arch tunnel.
Background
In the process of mine construction or production, disastrous water burst flooding accidents are often encountered, and great economic loss and casualties are caused. The water inrush accident of the mine mainly comprises the steps that a large water body hidden in the front is exposed in the tunneling process of a roadway, and a large-flow water body can quickly submerge the whole mine through a roadway system in a short time. During post-disaster treatment, high-pressure and high-speed water flow needs to be controlled firstly, and under the condition of flowing water of a high-pressure water head, the key is how to block the water flow in a roadway. In engineering practice, the blocking of water inrush from roadways is mainly divided into two stages: and (5) pouring aggregate and grouting for reinforcement. The pouring of the aggregate is a precondition and a key for effectively grouting and plugging a submerged roadway. The purpose of the aggregate pouring stage is to form a water blocking section of the roadway through the accumulation of aggregates to achieve the effect of water plugging.
With the increasingly depletion of shallow resources of the earth, the development intensity of deep resources of the earth is continuously increased, increasingly complicated hydrogeology and engineering geological conditions are bound to be faced, and the occurrence frequency of similar disasters is also bound to be increased. However, from the current aggregate pouring and plugging construction technology, relevant specification requirements are lacked, most of the aggregate is poured by the experience of constructors, and a large amount of ineffective drilling and great construction cost are caused, so that researches on the migration, accumulation and top connection of the aggregate under different hydrodynamic conditions are urgently needed to disclose the forming process of a water blocking section, a water blocking mechanism, a plugging criterion and the like.
At present, aggregate pouring and blocking tests for circular smooth inner wall channels have some research results, but arch structures of roadway outlines in circular smooth inner wall channels and actual engineering still have certain difference structures, so that accuracy of actual simulation tests is influenced, roughness of actual roadway inner walls cannot be simulated by the circular smooth inner wall channels, and roughness of roadway surfaces has important influence on migration, accumulation and roof connecting rules of poured aggregates. In order to better simulate the roadway water shutoff research in practical engineering, it becomes more important to design a scale test model for aggregate pouring and water shutoff in an arch roadway model.
Disclosure of Invention
The technical purpose can be achieved by adopting the following technical characteristics, and other multiple technical effects are brought.
The invention provides a test device for simulating aggregate pouring and water plugging of an arch tunnel, which comprises:
one end of the water inlet pipe is communicated with an external power water source;
the tunnel simulation pipeline is provided with an inlet end and an outlet end, the inlet end is communicated with the other end of the water inlet pipe, the tunnel simulation pipeline is a pipeline with an arched cross section, and the inner wall of the tunnel simulation pipeline has roughness;
one end of the water outlet pipe is communicated with the outlet end, and the other end of the water outlet pipe is communicated with the outside;
the filler is communicated with the roadway simulation pipeline, aggregate is configured in the filler, and the aggregate can be injected into the roadway simulation pipeline under the action of the filler;
the system comprises a data acquisition system and a data acquisition system, wherein the data acquisition system comprises a pressure sensor and a flow monitor, the pressure sensor is arranged on a tunnel simulation pipeline and is used for monitoring a pressure signal of the tunnel simulation pipeline in the aggregate filling process, and the flow monitor is used for monitoring a flow signal flowing through a water inlet pipe and a water outlet pipe of the tunnel simulation pipeline;
the support system comprises a supporting platform and a plurality of first telescopic devices arranged at the lower end of the supporting platform, the roadway simulation pipeline is arranged on the supporting platform, and the angle adjustment of the supporting platform is realized through telescopic motion of the plurality of first telescopic devices.
In the technical scheme, during testing, the support platform is adjusted to a preset angle through telescopic motion by the first telescopic device of the support system, an external power water source enters the roadway simulation pipeline through the water inlet pipe, and the external power water source flows into the outlet end from the inlet end and flows out from the outlet end; the method comprises the following steps that an irrigator injects aggregate into a roadway simulation pipeline until the aggregate forms a stable water blocking section in the roadway simulation pipeline, the irrigator is closed, in the process, a pressure sensor in a data acquisition system acquires the change rule of a pressure signal in the roadway simulation pipeline, and a flow monitor monitors the change rule of flow signals of a water inlet pipe and a water outlet pipe of the roadway simulation pipeline; the test device can accurately simulate the arched roadways with different inclination angles, roughness and other working conditions, thereby providing effective guidance for the design of an actual engineering scheme, and the test device has the advantages of small test field, easy operation and disassembly and convenient monitoring of test data.
In addition, the test device for simulating the aggregate pouring and water plugging of the arch-shaped tunnel can also have the following technical characteristics:
in one example of the present invention, the lane simulation pipe includes:
a conduit body having a lumen;
a rough plate detachably installed within the lumen, and the rough plate is arranged along an extending direction of the lumen.
In one example of the present invention, the lane simulation pipe further comprises:
a plurality of struts mounted at intervals within the lumen along a direction of extension of the lumen, the rough plate being defined between the struts and the lumen.
In one example of the present invention, the support stand includes:
the device comprises an arch body matched with the inner wall of the tube cavity and at least two bulges formed at the upper end of the arch body, wherein the bulges are arranged at intervals along the upper outer peripheral wall of the arch body;
grooves are arranged on two sides of the direction perpendicular to the extending direction of the rough plate, and the grooves are matched with the protrusions.
In one example of the present invention, the rough plate includes a plurality of rough plates, and the plurality of rough plates are arranged at intervals along a circumferential direction of the support frame.
In one example of the invention, the roadway simulating conduit is a transparent acrylic pipe.
In one example of the present invention, the syringe includes:
the hopper is provided with a discharge end, and the discharge end is communicated with a filling hole in the tunnel simulation pipeline;
and the sealing body is configured at the discharge end and can switch between an opening position for opening the discharge end and a closing position for closing the discharge end.
In one example of the present invention, the syringe further comprises:
and at least part of the second telescopic device extends into the funnel and is connected with the sealing body, and the sealing body is driven to switch between an opening position for opening the discharge end and a closing position for closing the discharge end along the flow direction of the funnel through telescopic motion.
In one example of the present invention, the syringe includes a plurality of syringes provided at equal intervals along an extending direction of the tunnel simulation pipe, and the plurality of syringes are capable of injecting the aggregate into the tunnel simulation pipe.
In one example of the invention, a speed regulating device is further arranged on the water inlet pipe and used for regulating the initial water flow speed entering the tunnel simulation pipeline.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting the invention to all embodiments thereof.
FIG. 1 is a schematic structural diagram of a test device for simulating aggregate pouring and water plugging of an arch tunnel according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a tunnel simulation pipeline according to an embodiment of the present invention (with a support frame hidden);
FIG. 3 is a schematic structural diagram of a supporting frame according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a rough plate according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a syringe according to an embodiment of the present invention.
List of reference numerals:
a test apparatus 100;
a water inlet pipe 110;
a roadway simulation pipeline 120;
a pipe body 121;
a lumen 1211;
a rough plate 122;
a recess 1221;
a support frame 123;
an arcuate 1231;
a protrusion 1232;
a card slot 12321;
a perfusion hole 1201;
a pressure tap 1202;
an inlet end 120A;
an outlet end 120B;
a water outlet pipe 130;
a syringe 140;
a hopper 141;
a discharge end 1411;
a second telescopic device 142;
a second cylinder 1421;
a second piston rod 1422;
a sealing body 143;
a data acquisition system 150;
a pressure sensor 151;
a flow rate monitor 152;
an image acquisition instrument 153;
a camera 1531;
a tripod 1532;
a DT data acquisition instrument 154;
a bracket system 160;
a support platform 161;
a first retractor 162;
a slope foot gauge 163;
a speed adjusting device 170;
a control valve 180;
a water tank 190;
a stand 191;
an outer water tube 200;
an overflow pipe 210;
a waste tank 220.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail and fully hereinafter with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The invention relates to a test device 100 for simulating aggregate pouring and water plugging of an arch-shaped tunnel, which is shown in figure 1 and comprises:
a water inlet pipe 110, one end of which is communicated with an external power water source;
a tunnel simulation pipeline 120 having an inlet end 120A and an outlet end 120B, the inlet end 120A being communicated with the other end of the water inlet pipe 110, wherein the tunnel simulation pipeline 120 is a pipeline having an arched cross section and having a roughness on an inner wall; that is, the arch shape has an upper portion having a semicircular configuration and a lower portion having a square configuration.
A water outlet pipe 130 having one end communicating with the outlet end 120B and the other end communicating with the outside;
the pouring device 140, the pouring device 140 is communicated with the tunnel simulation pipeline 120, and aggregate is configured in the pouring device 140, and the aggregate can be injected into the tunnel simulation pipeline 120 under the action of the pouring device 140;
the data acquisition system 150 comprises a pressure sensor 151 and a flow monitor 152, wherein the pressure sensor 151 is installed on the tunnel simulation pipeline 120 and used for monitoring the change rule of a pressure signal of the tunnel simulation pipeline 120 in the aggregate pouring process, and the flow monitor 152 is used for monitoring the change rule of a flow signal flowing through the water inlet pipe 110 and the water outlet pipe 130 of the tunnel simulation pipeline 120;
the support system 160 comprises a support platform 161 and a plurality of first expansion devices 162 arranged at the lower end of the support platform 161, the roadway simulation pipeline 120 is arranged on the support platform 161, and the plurality of first expansion devices 162 realize angle adjustment of the support platform 161 through expansion and contraction; specifically, the present invention includes two first telescopic devices 162 respectively disposed at two ends of the tunnel simulation pipeline 120, and the two first telescopic devices include a first cylinder and a first piston rod telescopic in the first cylinder, wherein the first cylinder is fixed to the ground, the first piston rod is hinged to the supporting platform 161, and the angle of the supporting platform 161 is adjusted by adjusting the telescopic heights of the two first telescopic devices 162; for example, the first telescopic device 162 is a jack.
During the test, the first telescopic device 162 of the bracket system 160 is used for adjusting the supporting platform 161 to a preset angle through telescopic motion, an external power water source enters the roadway simulation pipeline 120 through the water inlet pipe 110, and the external power water source flows into the outlet end 120B from the inlet end 120A; the method comprises the steps that aggregate is injected into a tunnel simulation pipeline 120 by a perfusion unit 140 until the aggregate forms a stable water blocking section in the tunnel simulation pipeline 120, the perfusion unit 140 is closed, in the process, a pressure sensor 151 in a data acquisition system 150 acquires the change rule of a pressure signal in the tunnel simulation pipeline 120, and a flow monitor 152 monitors the change rule of flow signals of a water inlet pipe 110 and a water outlet pipe 130 of the tunnel simulation pipeline; the test device 100 can accurately simulate the arched roadways with different inclination angles, roughness and other working conditions, thereby providing effective guidance for the design of an actual engineering scheme, having small test field, easy operation and disassembly and convenient monitoring of test data.
It can be understood that the DT data collector 154 and the pressure sensor 151 are used in combination, that is, the pressure sensor is coupled to the DT data collector 154 and connected to a computer to check and store the water pressure data during the test process in real time, and the water plugging success is comprehensively determined by monitoring the water pressure change value and observing the aggregate accumulation form in the pipeline, that is, when the water plugging succeeds, the water pressure near the water inlet pipe 110 is higher than the water pressure near the water outlet pipe 130.
The aggregate can be made of materials with proper particle sizes according to test requirements and is used for simulating sand, stones and the like for aggregate injection plugging in the water inrush roadway.
In an example of the present invention, a plurality of pressure taps 1202 are installed on the tunnel simulation pipe 120, and the pressure sensor 151 is installed in the pressure taps 1202 and is used for monitoring and recording pressure changes at different positions inside the tunnel simulation pipe 120 during the aggregate pouring process.
In one example of the present invention, as shown in fig. 2, the lane simulation pipe 120 includes:
a tube body 121 having a lumen 1211;
a rough plate 122 detachably mounted on an inner wall of the tube cavity 1211, and the rough plate 122 is arranged along an extending direction of the tube cavity 1211;
because the actual inner wall of the arch tunnel has roughness, in order to more accurately simulate the working condition of the tunnel under the actual working condition, the rough plate 122 is arranged in the tube cavity 1211 and is arranged along the extending direction of the tube cavity 1211; and by detachably installing the rough plate 122 in the tube cavity 1211, the rough plate 122 with different roughness can be conveniently replaced, so that the applicability and the flexibility of the tunnel simulation pipeline 120 to different working condition simulations are improved.
In one example of the present invention, the lane simulation pipe 120 further includes:
a plurality of scaffolds 123, the scaffolds 123 being mounted at intervals within the lumen 1211 along the extension direction of the lumen 1211, the rough plate 122 being defined between the scaffolds 123 and the lumen 1211;
for example, in the present invention, the support frames 123 include three and are disposed at the front end, the middle portion and the rear end of the tunnel simulation conduit 120, respectively, so as to effectively define the rough plate 122 between the support frames 123 and the lumen 1211, thereby facilitating the connection between the rough plate 122 and the lumen. It should be noted that the supporting frame 123 is connected with the tunnel simulation pipeline 120 by plugging, that is, plugging holes are configured on two sides of the bottom wall of the tunnel simulation pipeline, and two sides of the supporting frame 123 are plugged in the plugging holes.
In an example of the present invention, as shown in fig. 3 and 4, the support frame 123 includes:
an arch 1231 adapted to an inner wall of the lumen 1211 and a protrusion 1232 formed at an upper end of the arch 1231, wherein the protrusion 1232 includes at least two protrusions spaced along an upper outer peripheral wall of the arch 1231;
that is to say, a clamping groove 12321 is formed between two adjacent protrusions 1232, the rough plate 122 is adapted to the clamping groove 12321, and the grooves 1221 at two sides of the rough plate 122 are inserted into the protrusions 1232 on the supporting frame 123, so that the position of the rough plate 122 can be fixed, and roughness is provided for the inner wall of the lumen 1211; it will be appreciated that rough plate 122 is positioned against the inner wall of lumen 1211, thereby allowing lumen 1211 to more accurately simulate an arcuate tunnel.
In an example of the present invention, the rough plate 122 includes a plurality of rough plates 122, and the plurality of rough plates 122 are arranged at intervals along a circumferential direction of the support frame 123; that is, a plurality of protrusions 1232 are provided at intervals in the circumferential direction of the support frame 123, and the locking grooves 12321 formed between two adjacent protrusions 1232 correspond to the rough plates 122 one to one.
In order to simulate an arch tunnel more accurately, a plurality of rough plates 122 are arranged at intervals in the circumferential direction of the support frame 123, so that the rough plates 122 are fully distributed on the inner wall of the whole tunnel simulation pipeline 120; correspondingly, a plurality of protrusions 1232 are arranged at intervals along the upper outer peripheral wall of the arch 1231, and correspondingly, a plurality of rough plates 122 are respectively inserted between two adjacent protrusions 1232, so as to conveniently realize the formation of roughness on the inner wall of the tube cavity 1211 of the tunnel simulation pipeline 120; because the top of the support frame 123 is of an arc structure, a plurality of protrusions are arranged at the top of the support frame 123 to define a plurality of rough plates 123, so that roughness is conveniently formed at the top, and the side wall of the support frame 123 and the tunnel simulation pipeline 120 can define one rough plate 122 together through the protrusion 1232 to realize the realization of the roughness of the side wall of the tunnel simulation pipeline 120.
It can be understood that a rough plate 122 is also connected to the bottom wall of the tunnel simulation pipeline 120 to simulate the roughness of the bottom wall of the tunnel, the rough plate 122 on the bottom wall can be connected to the bottom wall by plugging or bonding, for example, a first insertion hole and a second insertion hole are respectively arranged on the bottom wall and the rough plate arranged on the bottom wall, and the support frame 123 sequentially penetrates through the second insertion hole of the rough plate 122 and the first insertion hole on the bottom wall and is fixed on the bottom wall of the tunnel simulation pipeline 120, so that the support frame 123 fixes the rough plate 120 on the bottom wall while fixing the position.
Of course, the invention is not limited thereto, and a plurality of fastening grooves may be disposed on the inner wall of the tunnel simulation pipeline 120, and the fastening grooves are disposed at intervals along the circumferential direction of the inner wall of the tunnel simulation pipeline 120, and each fastening groove is adapted to the corresponding rough plate 122; the fastening groove may be integrally formed with the tunnel simulation pipeline 120, or may be fastened or bonded to the inner wall of the tunnel simulation pipeline 120.
In one example of the present invention, the tunnel simulation pipe 120 is a transparent acrylic pipe;
the arch-shaped transparent pipeline is a transparent acrylic pipe with a semi-circular arch-shaped top and two upright walls, so that the visualization effect in the process of simulating the arch-shaped tunnel aggregate pouring and plugging test is realized;
the semicircular arch transparent acrylic pipe fitting is integrally formed by adopting a seamless hot-pressing process technology, so that the defects of poor compactness, poor pressure resistance and poor light transmittance of the traditional bonding process are overcome;
the thickness of the semicircular arch transparent acrylic tube is 10mm, the semicircular arch transparent acrylic tube can bear the water pressure of 0.5MPa, and the reliability of the test device 100 is improved;
the light transmittance of the semicircular arch transparent acrylic tube is not lower than 92%, so that the whole pouring plugging test process is convenient to observe;
the semi-circular arch transparent acrylic tube has certain acid-base tolerance, and the reliability of the simulated tunnel pipeline is improved;
the roughness plate adopts a three-dimensional laser engraving process, and continuous engraving and forming can be realized by inputting an international standard roughness curve (JCR) into an engraving machine; therefore, in the test implementation process, a proper roughness plate can be selected according to a specific test scheme.
In one example of the present invention, as shown in fig. 5, the syringe 140 includes:
a hopper 141 having a feeding end and a discharging end 1411, wherein the discharging end 1411 is communicated with the filling hole 1201 on the roadway simulation pipeline 120;
a sealing body 143 which is disposed at the discharge end 1411 and which is capable of switching between an open position for opening the discharge end 1411 and a closed position for closing the discharge end 1411;
that is to say, through adjusting the sealing body 143 and moving between open position and closed position to adjust the bore size of discharge end 1411 port, thereby adjust the flow size of the aggregate that flows out by discharge end 1411, then realize the flow control to perfusion ware 140, in order to satisfy corresponding experimental condition.
It is worth noting that the discharge end 1411 of the syringe 140 is communicated with the pouring hole of the tunnel simulation pipeline through a hose.
In one example of the present invention, the syringe 140 further comprises:
the second telescopic device 142 at least partially extends into the funnel 141 and is connected with the sealing body 143, and the sealing body 143 is driven to switch and move between an opening position for opening the discharge end 1411 and a closing position for closing the discharge end 1411 along the flow direction of the funnel 141 through telescopic motion; for example, the second telescopic device 142 is an electric push rod;
specifically, the second telescopic device 142 includes a second cylinder 1421 and a second piston 1422 telescopic in the second cylinder 1421, wherein the position of the second cylinder 1421 and the funnel 141 are fixed relatively, for example, by a bracket; the second piston rod 1422 is connected to the sealing body 143, and the sealing body 143 moves up and down in the funnel 141 by the telescopic movement of the second piston rod 1422, so that the control of whether the aggregate in the funnel 141 is discharged or not can be realized, and the filling speed of the aggregate can be controlled by controlling the movement of the second telescopic device 142.
In one example of the present invention, the plurality of the syringes 140 are provided at equal intervals along the extending direction of the tunnel simulation pipe 120, and the plurality of the syringes 140 inject the aggregates into the tunnel simulation pipe 120 in synchronization or in a different order;
the plurality of filling devices 140 can accurately simulate the working condition that a plurality of filling holes of an actual roadway form a plurality of water blocking sections.
In an example of the present invention, the water inlet pipe 110 is further provided with a speed adjusting device 170, which is used for adjusting the initial water flow speed entering the tunnel simulation pipeline 120 to adapt to the tunnel water inrush situation under different working conditions;
for example, the speed adjusting device 170 is a high pressure pump, and the external water source can be pressurized by the high pressure pump, so as to adjust the flow rate of the external water source to meet the corresponding test requirements.
In one example of the present invention, the flow monitor 152 includes two,
one of the flow rate monitors 152 is disposed on the inlet pipe 110, and the other flow rate monitor 152 is disposed on the outlet pipe 130;
can real-time supervision gushing water flow through set up flow monitor 152 at inlet tube 110, and dispose flow monitor 152 and can effectively monitor the both ends flow change of simulating the tunnel pipeline in the water shutoff test process on inlet tube 110, outlet pipe 130, provide the guidance for actual engineering. The flow rate monitor has the functions of displaying and storing instantaneous flow rate and accumulated flow rate data.
In one example of the present invention, the method further comprises: the control valve (180) is controlled such that,
the water inlet pipe 110 is used for adjusting the flow of the water inlet pipe 110 to meet the water inrush flow required by the test;
the flow of the water inlet pipe 110 can be adjusted by controlling the valve 180, and the water inrush environment of the actual roadway is further simulated.
In one example of the present invention, the method further comprises: the image-capturing device 153 is provided with,
the image acquisition module is respectively configured at two sides of the extension direction of the tunnel simulation pipeline 120 and is used for shooting the image and video information of aggregate deposition, migration and plugging in the tunnel simulation pipeline 120 in the simulation test process; the pipeline plugging mechanism under different test conditions can be revealed by analyzing picture and video data at the later stage; the front half part and the rear half part which are respectively arranged on the same side of the tunnel simulation pipeline 120 are used for shooting pictures and video information of aggregate deposition, migration and plugging in the tunnel simulation pipeline in the simulation test process.
Specifically, the image acquirer 153 includes: a camera 1531 and a tripod 1532, the camera 1531 being fitted on the tripod 1532, thereby facilitating adjustment of the position of the camera 1531 to meet an optimal photographing angle; the situation in the simulated tunnel pipeline can be observed more intuitively through the image acquisition instrument 153.
It should be noted that, as shown in fig. 2, since the image capturing device 153 is disposed at one side of the tunnel simulation pipeline 120, in order to facilitate the image capturing device 153 to capture the image and video information of aggregate deposition, migration and plugging in the tunnel simulation pipeline 120, the rough plate 122 is not disposed at the side of the tunnel simulation pipeline 120 where the image capturing device 153 is disposed.
In one example of the present invention, the rack system 160 further comprises: the slope foot gauge 163 is configured on the supporting platform 161, when the first telescopic device 162 is adjusted, the angle adjustment of the supporting platform 161 is realized, the slope foot gauge 163 can accurately measure the inclination angle of the supporting platform 161, and the actual working condition of a roadway can be simulated more accurately.
In one example of the present invention, the method further comprises:
the water tank 190 is disposed on a stand 191 having a certain height, and the upper end of the water tank 190 is communicated with an external water source, and the lower end of the water tank 190 is communicated with the water inlet pipe 110, wherein the external water source is communicated with the water tank 190 through an external water pipe 200, and the water tank 190 is further provided with an overflow pipe 210, so that overflowing water stored in the water tank 190 can be discharged in time, and a stable power water source can be established. It is understood that the control valve 180 is provided to the external water pipe 200 for the convenience of controlling the external water source, and the control valve 180 is provided to the overflow pipe 210 for the convenience of controlling the overflow pipe 210. It should be noted that the height of the stand 191 is adjustable to vary the hydraulic pressure required for the test.
In one example of the present invention, the method further comprises: and the waste liquid tank 220 is communicated with the water outlet pipe 130 and is used for collecting the waste water flowing out of the roadway simulation pipeline 120 in the test process and the carried-out part of aggregate-containing waste liquid so as to prevent the waste liquid from being directly discharged to pollute water sources and the environment.
The specific working principle of the invention is as follows:
during the test, the first telescopic device 162 of the bracket system 160 adjusts the angle of the supporting platform 161 through telescopic motion and accurately sets a preset inclination angle according to a slope angle gauge, the speed adjusting device 170 is turned on to adjust the speed of the water flow, and the water inrush flow of the external power water source is adjusted through the control valve 180, so that the external power water source flows into the outlet end 120B from the inlet end 120A and flows out from the outlet end 120B; the speed of injecting aggregate into the tunnel simulation pipeline 120 by the irrigator 140 is adjusted by adjusting the second telescopic device 142 until the aggregate forms a stable water blocking section in the tunnel simulation pipeline 120, the irrigator 140 is closed, in the process, a pressure sensor 151 in a data acquisition system 150 acquires a pressure signal in the tunnel simulation pipeline 120, a flow monitor 152 monitors a flow signal of the pressure signal, and an image acquisition instrument 153 shoots pictures and video information of the tunnel simulation pipeline 120 in the simulation test process; by carrying out an aggregate pouring and plugging test on the arch-shaped roadway model, the evaluation of the sedimentation and migration rule and the water plugging effect of the aggregates under the conditions of different aggregate particle sizes, flowing water flow velocity, roadway inclination angles, roughness and the like is researched, so that effective guidance is provided for the design of an actual engineering scheme. The achievement of the invention provides scientific evidence for roadway water inrush plugging, treatment of roadway water inrush disasters and the like, and has important theoretical significance and practical value; the test device 100 can accurately simulate the arched roadways with different inclination angles, roughness and other working conditions, thereby providing effective guidance for the design of an actual engineering scheme, having small test field, easy operation and disassembly and convenient monitoring of test data.
The invention overcomes the defects that most of the existing test devices do not consider the shape, the roughness and the like of the tunnel in the actual engineering by using the engineering model which is closest to the real situation, realizes the simulation of arch tunnels with different inclination angles and roughness, and performs the visual aggregate perfusion water plugging test research under different water inrush conditions. The method further explores the deposition migration rule of the aggregates, the aggregate pouring and blocking effect and the influence factor criterion under the factors of different aggregate particle sizes, flowing water flow rates and the like, and has important significance and value for guiding roadway water inrush in actual coal mine construction and adopting aggregate pouring and blocking engineering. Especially when case engineering is lacked to guide implementation in actual engineering, the test device can provide a method which is relatively simple in structural design, small in occupied space and convenient for monitoring and recording test data, avoids repeatedly designing an engineering model, reduces cost and simultaneously can ensure practicability.
Although the exemplary embodiment of the simulated arch roadway aggregate grouting water plugging test device 100 proposed by the present invention has been described in detail with reference to the preferred embodiment, those skilled in the art will appreciate that various modifications and changes can be made to the above specific embodiment without departing from the concept of the present invention, and various combinations of the technical features and structures proposed by the present invention can be made without departing from the scope of the present invention, which is defined by the appended claims.
Claims (6)
1. The utility model provides a simulation arch tunnel aggregate fills water shutoff test device which characterized in that includes:
a water inlet pipe (110) having one end communicated with an external power water source;
the tunnel simulation pipeline (120) is provided with an inlet end (120A) and an outlet end (120B), the inlet end (120A) is communicated with the other end of the water inlet pipe (110), the tunnel simulation pipeline (120) is a pipeline with an arched cross section, and the inner wall of the tunnel simulation pipeline has roughness; the tunnel simulation pipeline (120) includes: a tube body (121) having a lumen (1211); a rough plate (122) detachably mounted inside the lumen (1211), the rough plate (122) being arranged along an extension direction of the lumen (1211); a plurality of scaffolds (123), the scaffolds (123) being mounted within the lumen (1211) at intervals along the extension direction of the lumen (1211), the rough plate (122) being defined between the scaffolds (123) and the lumen (1211); the rough plate (122) comprises a plurality of rough plates (122), and the rough plates (122) are arranged at intervals along the circumferential direction of the support frame (123); wherein the support frame (123) comprises: an arch body (1231) matched with the inner wall of the tube cavity (1211) and a bulge (1232) formed at the upper end of the arch body (1231), wherein the bulge (1232) comprises at least two bulges and is arranged at intervals along the upper peripheral wall of the arch body (1231); wherein, two sides of the direction vertical to the extending direction of the rough plate (122) are provided with grooves (1221), and the grooves (1221) are matched with the bulges (1232);
a water outlet pipe (130) having one end communicated with the outlet end (120B) and the other end communicated with the outside;
the pouring device (140), the pouring device (140) is communicated with the tunnel simulation pipeline (120), aggregate is configured in the pouring device (140), and the aggregate can be injected into the tunnel simulation pipeline (120) under the action of the pouring device (140);
the data acquisition system (150) comprises a pressure sensor (151) and a flow monitor (152), wherein the pressure sensor (151) is installed on the tunnel simulation pipeline (120) and used for monitoring a pressure signal of the tunnel simulation pipeline (120) in the aggregate pouring process, and the flow monitor (152) is used for monitoring a flow signal of a water inlet pipe (110) and a water outlet pipe (130) flowing through the tunnel simulation pipeline (120);
the support system (160) comprises a supporting platform (161) and a plurality of first telescopic devices (162) arranged at the lower end of the supporting platform (161), the roadway simulation pipeline (120) is arranged on the supporting platform (161), and the plurality of first telescopic devices (162) realize angle adjustment of the supporting platform (161) through telescopic motion.
2. The simulated arch-shaped roadway aggregate pouring water plugging test device as claimed in claim 1,
the tunnel simulation pipeline (120) is a transparent acrylic pipe fitting.
3. The simulated arch-shaped roadway aggregate pouring water plugging test device according to claim 1,
the syringe (140) comprises:
a hopper (141) having a discharge end (1411), the discharge end (1411) being in communication with a pouring aperture (1201) on the roadway simulating conduit (120);
and a sealing body (143) which is disposed at the discharge end (1411) and which is capable of switching between an open position for opening the discharge end (1411) and a closed position for closing the discharge end (1411).
4. The simulated arch-shaped roadway aggregate pouring water plugging test device according to claim 3,
the syringe (140) further comprises:
the second telescopic device (142) at least partially extends into the funnel (141) and is connected with the sealing body (143), and the sealing body (143) is driven to move in a switching mode between an opening position for opening the discharge end (1411) and a closing position for closing the discharge end (1411) along the flowing direction of the funnel (141) through telescopic movement.
5. The simulated arch-shaped roadway aggregate pouring water plugging test device according to claim 1 or 3,
the plurality of the pouring devices (140) are arranged at equal intervals along the extending direction of the roadway simulation pipeline (120), and the plurality of the pouring devices (140) can pour aggregate into the roadway simulation pipeline (120).
6. The simulated arch-shaped roadway aggregate pouring water plugging test device as claimed in claim 1,
the water inlet pipe (110) is also provided with a speed regulating device (170) for regulating the initial water flow speed entering the roadway simulation pipeline (120).
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| CN202111009672.5A CN113702264B (en) | 2021-08-31 | 2021-08-31 | Simulation arch tunnel aggregate fills water shutoff test device |
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| CN202111009672.5A CN113702264B (en) | 2021-08-31 | 2021-08-31 | Simulation arch tunnel aggregate fills water shutoff test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4000621A (en) * | 1975-06-19 | 1977-01-04 | The United States Of America As Represented By The Secretary Of The Interior | Remote sealing of mine passages containing flowing water |
| CN104265331B (en) * | 2014-07-08 | 2017-09-19 | 中国矿业大学 | A kind of Visualization system and device of simulation tunnel gushing water slip casting closure |
| CN204175316U (en) * | 2014-10-22 | 2015-02-25 | 淮南矿业(集团)有限责任公司 | U-shaped steel bracket |
| CN108562515B (en) * | 2018-03-27 | 2023-11-28 | 东北大学 | Multi-factor test system for crack rock mass grouting slurry diffusion |
| CN110542752B (en) * | 2019-10-09 | 2024-09-03 | 中国科学院地理科学与资源研究所 | Slope runoff simulation device and application method thereof |
| CN212614785U (en) * | 2019-12-03 | 2021-02-26 | 张锋 | Coal mining tunnel protective bracket |
| CN211784975U (en) * | 2020-03-16 | 2020-10-27 | 华北有色工程勘察院有限公司 | Fracture porous grouting simulation test device under flowing water condition |
| CN213743458U (en) * | 2020-12-04 | 2021-07-20 | 汤冲冲 | Combined telescopic mining U-shaped support frame |
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