CN210427219U - Constant-resistance anchor cable experiment system - Google Patents
Constant-resistance anchor cable experiment system Download PDFInfo
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- CN210427219U CN210427219U CN201920520407.5U CN201920520407U CN210427219U CN 210427219 U CN210427219 U CN 210427219U CN 201920520407 U CN201920520407 U CN 201920520407U CN 210427219 U CN210427219 U CN 210427219U
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Abstract
The utility model relates to an anchor cable experiment technical field, in particular to a constant-resistance anchor cable experiment system, which comprises a pressure applying host, a simulation piece, a constant-resistance anchor cable and a hydraulic control system; the pressure host comprises a frame, wherein a plurality of pressure loaders for applying pressure to the simulation piece are uniformly distributed on each side in the frame; the simulation piece is placed in the frame and provided with a simulation roadway, and the constant-resistance anchor cables are provided with a plurality of constant-resistance anchor cables which are fixed in the simulation roadway in an equal-central-angle mode; the hydraulic control system is connected with the pressure loader to control the pressure of the hydraulic loader, and each constant-resistance anchor cable is provided with a pressure sensor for detecting the pressure of the constant-resistance anchor cable, so that the field supporting state of the constant-resistance anchor cable can be better simulated, and the supporting effect of different constant-resistance anchor cable supporting structures can be detected in a model.
Description
Technical Field
The utility model relates to an anchor rope experiment technical field particularly, relates to a constant resistance anchor rope experimental system.
Background
The constant-resistance anchor cable is the most basic component of roadway support in contemporary coal mines, and binds surrounding rocks of the roadway together to enable the surrounding rocks to support themselves. The constant-resistance anchor cable is not only used in mines, but also used in engineering technology to actively reinforce slopes, tunnels and dam bodies. The constant-resistance anchor rope is used as a tension member penetrating into a stratum, one end of the constant-resistance anchor rope is connected with an engineering structure, and the other end of the constant-resistance anchor rope penetrates into the stratum, so that the stress and deformation resistance of the constant-resistance anchor rope and the supporting effect of different supporting designs of the constant-resistance anchor rope can be better understood.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a constant resistance anchor rope experimental system, its support state through the on-the-spot constant resistance anchor rope of constant resistance anchor rope simulation for the experiment to test the different supporting construction's of constant resistance anchor rope in the experiment strut the effect, the resistance to deformation ability of the constant resistance anchor rope in the better understanding is in reality.
The embodiment of the utility model is realized like this:
a constant-resistance anchor cable experiment system comprises a pressure applying host, a simulation piece, a constant-resistance anchor cable and a hydraulic control system;
the pressure host comprises a frame, wherein a plurality of pressure loaders for applying pressure to the simulation piece are uniformly distributed on each side in the frame; the simulation piece is placed in the frame and provided with a simulation tunnel, and a plurality of constant-resistance anchor cables are fixed in the simulation tunnel;
the hydraulic control system is connected with the pressure loader to control the pressure of the hydraulic loader, and each constant-resistance anchor cable is provided with a pressure sensor for detecting the pressure of the constant-resistance anchor cable.
Further, the utility model discloses an in one embodiment, above-mentioned constant resistance anchor rope includes plastic sleeve, first backing plate, second backing plate and nut, inside plastic sleeve's one end stretched into the simulation piece, plastic sleeve's the other end was located the simulation tunnel, and threaded connection in proper order first backing plate, second backing plate and nut, the pressure sensors sets up between first backing plate and the second backing plate.
Furthermore, in an embodiment of the present invention, the constant-resistance anchor cable further includes a resistance element and a rod body, the resistance element is a cone structure, a diameter of a cone end of the resistance element is smaller than a diameter of the plastic sleeve, and a diameter of a tail end of the resistance element is larger than the diameter of the plastic sleeve;
the cone end of the resistance piece is located from the plastic sleeve one end of the plastic sleeve in the simulation roadway extends into the plastic sleeve, and the rod body is connected with the cone end of the resistance piece and extends out of the other end of the plastic sleeve.
Further, the utility model discloses an in an embodiment, above-mentioned body of rod is steel strand wires, the resistance is the round platform structure, the little circle end of resistance is the awl end, the big circle end of resistance is the tail end.
Further, in an embodiment of the present invention, the rod body is a steel strand, and an anchoring plate is connected to an end of the rod body extending from the plastic sleeve.
Further, the utility model discloses an in the embodiment, above-mentioned analog piece is the gypsum structure, the analog piece is from last to being limestone layer, argillaceous sandstone layer, middlings sandstone layer, sandy shale layer, middlings stratum A, limestone layer A, coal seam, middlings stratum A, sandy shale layer A, coal seam A, sandy shale layer B, middlings stratum B and limestone layer B down in proper order.
Further, in an embodiment of the present invention, the above simulation roadway is provided in the coal seam a.
Further, in an embodiment of the present invention, the constant-resistance anchor cable is correspondingly provided with two rows in the axial direction of the simulation tunnel;
each row of the constant-resistance anchor cables are arranged on the same circumference of the simulation roadway and distributed in the form of equal central angles.
The embodiment of the utility model provides a beneficial effect is:
the scheme can be used for carrying out simulation test on the constant-resistance anchor cable for the experiment, controlling the stress of the constant-resistance anchor cable for the experiment in a simulation tunnel, simulating the stress state of the constant-resistance anchor cable in the actual field support, and testing the support effect of the constant-resistance anchor cable in the actual field under different support structures.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of a constant-resistance anchor cable according to an embodiment of the present invention;
fig. 2 is a schematic view of an explosion structure of a constant-resistance anchor cable according to an embodiment of the present invention;
fig. 3 is a schematic view of a three-dimensional structure of a constant-resistance anchor cable according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a resistance element according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an experimental system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a partially enlarged structure of an experimental system according to an embodiment of the present invention;
fig. 7 is a cross-sectional view taken along line a-a of fig. 6 according to an embodiment of the present invention;
fig. 8 is a schematic view of the relationship between the force applied to the first constant-resistance anchor cable and the sliding of the resistance element according to the embodiment of the present invention;
fig. 9 is a schematic view of the relationship between the force applied to the first constant-resistance anchor cable a and the sliding of the resistance member according to the embodiment of the present invention;
fig. 10 is a schematic view of the relationship between the force applied to the first constant-resistance anchor cable B and the sliding of the resistance member according to the embodiment of the present invention;
fig. 11 is a schematic view of the relationship between the force applied to the second constant-resistance anchor cable and the sliding of the resistance element according to the embodiment of the present invention;
fig. 12 is a schematic view of the relationship between the force applied to the second constant-resistance anchor cable a and the sliding of the resistance member according to the embodiment of the present invention;
fig. 13 is a schematic view of the sliding relationship between the force applied to the second constant-resistance anchor cable B and the resistance element according to the embodiment of the present invention.
1-plastic sleeve; 101-embedded end; 102-a free end; 2-a first backing plate; 3-a second backing plate; 4-a nut; 5-a resistance element; 501-conical end; 502-tail end; 6-a rod body; 7-a connecting part; 8-round hole; 9-an anchor plate; 10-a pressure sensor; 11-a pressure applying host; 111-pressure loader; 12-a dummy; 121-simulating a roadway; 122-a lime rock formation; 123-a argillaceous sandstone layer; 124-medium sand rock stratum; 125-sandy mudstone; 126-sandstone layer a; 127-limestone layer A; a 128-seam of coal; 129-medium sand rock layer B; 130-sandy mudstone a; 131-coal seam A; 132-sandy mudstone B; 133-medium sand formation C; 134-limestone layer B; 14-a constant-resistance anchor cable; 15-a constant-resistance anchor cable A; 16-a constant-resistance anchor cable B; 17-second constant-resistance anchor cable; 18-second constant-resistance anchor cable A; and 19-second constant-resistance anchor cable B.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 4, the present embodiment provides a constant-resistance anchor cable for simulation experiments, which includes a plastic sleeve 1, a pad, a nut 4, a resistance element 5, and a rod body 6, wherein the pad includes a first pad 2 and a second pad 3, and the plastic sleeve 1, the first pad 2, the second pad 3, and the nut 4 are made of teflon. One end of plastic sleeve 1 is buried end 101, the other end of plastic sleeve 1 is free end 102, the week side of plastic sleeve 1 is provided with the external screw thread, first backing plate 2, second backing plate 3 and nut 4 in proper order with plastic sleeve 1's free end 102 threaded connection, resistance 5 is the cone structure, the internal diameter of resistance 5's awl end 501 ratio plastic sleeve 1 is little, the tail end 502 of resistance 5 is big than plastic sleeve 1's internal diameter, resistance 5's awl end 501 stretches into in plastic sleeve 1 from plastic sleeve 1's free end 102, resistance 5's awl end 501 connects the one end of the body of rod 6, the other end of the body of rod 6 is the anchor end, the anchor end stretches out from plastic sleeve 1's buried end 101, the anchor end is connected with anchor plate 9, be provided with pressure sensors 10 between first backing plate 2 and the second backing plate 3.
Referring to fig. 4, the resistance piece 5 is a circular truncated cone structure, the small round end of the resistance piece 5 is a conical end 501, the large round end of the resistance piece 5 is a tail end 502, the conical end 501 of the resistance piece 5 is provided with a columnar connecting portion 7, the axis of the connecting portion 7 coincides with the axis of the resistance piece 5, a round hole 8 is formed in the middle of the outer periphery of the connecting portion 7, the round hole 8 penetrates through the connecting portion 7 in the radial direction of the connecting portion 7, the rod body 6 is a steel strand, and the steel strand is fastened after passing through the round hole 8, so that the connection between the steel strand and the resistance piece 5 is.
The constant resistance anchor rope for experiments in this scheme is through changing the relation of connection of resistance 5 and plastic casing 1, the form that resistance 5 atress can be close the constant resistance within plastic casing 1 slides, make resistance 5 produce the negative poisson ratio structural effect in the simulation experiment, the constant resistance anchor rope of simulation experiment forms the geometric similarity condition with the NPR constant resistance anchor rope under the in-service use condition as far as possible, the convenience is to the experiment and the data research of NPR constant resistance anchor rope, the constant resistance anchor rope for this scheme experiments simple structure simultaneously, high durability and convenient use, can popularize in the laboratory site, and is suitable for mass production.
The Negative Poisson Ratio is English Negative Poisson's Ratio, and the anchor cable with the Negative Poisson Ratio is called NPR constant-resistance anchor cable for short.
Example 2
With reference to fig. 5 to 7 and fig. 1 to 4, the present embodiment provides a constant-resistance anchor cable experiment system, which includes a pressure applying host 11, a simulation piece 12 and a hydraulic control system, where the pressure applying host 11 includes a frame, the frame is a rectangular frame, a plurality of pressure loaders 111 are uniformly arranged on each side in the frame, the simulation piece 12 is placed inside the frame, the pressure loaders 111 are used for applying pressure to the simulation piece 12, the hydraulic control system is connected to the pressure loaders 111, and the hydraulic control system controls the pressure of each hydraulic loader. The simulation piece 12 is placed in the frame, the simulation piece 12 is of a gypsum structure, and the simulation piece 12 sequentially comprises a limestone layer 122, a argillaceous sandstone layer 123, a medium sandstone layer 124, a sandy shale layer 125, a medium sandstone layer A126, a limestone layer A127, a coal layer 128, a medium sandstone layer B129, a sandy shale layer A130, a coal layer A131, a sandy shale layer B132, a medium sandstone layer C133 and a limestone layer B134 from top to bottom. A simulation tunnel 121 is formed in the coal seam A131, the length direction of the simulation tunnel 121 is perpendicular to the force application direction of the pressure loader 111, and the pressure loader 111 applies pressure to the simulation piece 12 in the radial direction of the simulation tunnel 121. When the simulation part 12 is processed, the constant-resistance anchor cables are pre-embedded in the simulation part 12, two rows of the constant-resistance anchor cables are arranged in the length direction of the simulation roadway 121, as shown in fig. 5-7, eight constant-resistance anchor cables are arranged in each row, and each row of the constant-resistance anchor cables are distributed on the same circumference at equal circle center angles. The constant-resistance anchor cable comprises a plastic sleeve 1, a first base plate 2, a second base plate 3, a nut 4, a resistance piece 5, a rod body 6 and a pressure sensor 10, wherein one end of the plastic sleeve 1 extends into a simulation piece 12, the other end of the plastic sleeve 1 is positioned in a simulation roadway 121, and one end of the plastic sleeve 1 extending into the simulation piece 12 is a buried end 101; one end that plastic casing 1 exposes in simulation tunnel 121 is free end 102, the free end 102 of plastic casing 1 threaded connection first backing plate 2 in proper order, second backing plate 3 and nut 4, pressure sensors 10 set up between first backing plate 2 and second backing plate 3, resistance 5 is the cone structure, the internal diameter of resistance 5's awl end 501 than plastic casing 1 is little, the tail end 502 of resistance 5 is big than plastic casing 1's internal diameter, resistance 5's awl end 501 stretches into in plastic casing 1 from plastic casing 1's free end 102, the one end of the body of rod 6 is connected to resistance 5's awl end 501, the other end of the body of rod 6 is the anchor end, the anchor end stretches out from plastic casing 1's embedding end 101, the anchor end is connected with anchor plate 9. The pressure sensor 10 is electrically connected to a data acquisition system, and the data acquisition system is used for collecting an electrical signal generated by the pressure sensor 10 after being subjected to pressure.
On the basis of the structure combination principle, as shown in fig. 1-7, through the static force tensile test constant-resistance anchor cable, the plastic sleeve 1, the first base plate 2, the second base plate 3 and the nut 4 are made of polytetrafluoroethylene, the length of the rod body 6 is 210mm, the diameter of the rod body 6 is 2mm, the length of the plastic sleeve 1 is 50mm, the inner diameter of the sleeve is 8mm, the diameter range of the tail end 502 of the resistance piece 5 is 8.1mm-8.4mm, and the constant-resistance anchor cable constant-resistance data are as follows:
referring to fig. 5-7, the length of the rod body 6 is 210mm, the diameter of the rod body 6 is 2mm, the length of the plastic sleeve 1 is 50mm, the inner diameter of the sleeve is 8mm, the diameter of the tail end 502 of the resistance piece 5 is 8.3mm, the diameter of the conical end 501 of the resistance piece 5 is 7mm, the height of the resistance piece 5 is 10mm, two rows of constant-resistance anchor cables are arranged in the length direction of the simulation roadway 121, each row of the constant-resistance anchor cables is provided with eight constant-resistance anchor cables, each row of the constant-resistance anchor cables are distributed at equal center angles on the same circumference, and the two rows of the constant-resistance anchor cables are aligned. Referring to fig. 7, L1 is L2 is 150mm, L3 is 100mm, the anchor end of the constant-resistance anchor cable at the top of the simulation tunnel 121 is fixed to the limestone layer 122, 6 pressure loaders 111 are arranged on each side in the frame, the pressure loader 111 is controlled by a hydraulic control system to apply pressure, and the data acquisition system collects the axial stress of the constant-resistance anchor cable. The scheme can be used for carrying out simulation test on the constant-resistance anchor cable, controlling the stress of the constant-resistance anchor cable in a simulation tunnel 121, simulating the stress state of the field support of the constant-resistance anchor cable, and testing the support effect of the constant-resistance anchor cable under different support structures. The constant-resistance anchor cable can be designed into other supporting structures, and the supporting structures can be changed according to simulation experiment requirements.
Referring to fig. 8-13, a first constant-resistance anchor cable 14 and a second constant-resistance anchor cable 17 support the upper portion of the simulation tunnel, the first constant-resistance anchor cable a15, the first constant-resistance anchor cable B16, the second constant-resistance anchor cable a18 and the second constant-resistance anchor cable B19 are disposed on two sides of the upper portion of the simulation tunnel, two sides of the first constant-resistance anchor cable 14 are respectively corresponding to the first constant-resistance anchor cable a15 and the first constant-resistance anchor cable B16, and two sides of the second constant-resistance anchor cable 17 are respectively corresponding to the second constant-resistance anchor cable a18 and the second constant-resistance anchor cable B19. The first constant-resistance anchor cable 14 and the second constant-resistance anchor cable 17 support the right upper part of the simulated roadway, the sliding resistance of the first constant-resistance anchor cable A15, the first constant-resistance anchor cable B16, the second constant-resistance anchor cable A18 and the second constant-resistance anchor cable B19 is about 80N, when the stress of the constant-resistance anchor cables is close to 100N, the stress of the resistance piece 5 exceeds the maximum static friction force, and the resistance piece 5 slides in the plastic sleeve 1 in a mode close to constant resistance.
In the scheme, the simulation piece 12 is manufactured by combining the soil layer structure of the coal mine area, and the structures of the limestone layer 122, the limestone layer A127 and the limestone layer B134 are the same; the structures of the medium sand rock layer 124, the medium sand rock layer A126, the medium sand rock layer B129 and the medium sand rock layer C133 are the same; coal seam 128 is structurally identical to coal seam a 131; the sandy sandstone layer 125, the sandy sandstone layer a130, and the sandy sandstone layer B132 are identical in structure.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A constant-resistance anchor cable experiment system is characterized by comprising a pressure applying host, a simulation piece, a constant-resistance anchor cable and a hydraulic control system;
the pressure host comprises a frame, wherein a plurality of pressure loaders for applying pressure to the simulation piece are uniformly distributed on each side in the frame; the simulation piece is placed in the frame and provided with a simulation tunnel, and a plurality of constant-resistance anchor cables are fixed in the simulation tunnel;
the hydraulic control system is connected with the pressure loader to control the pressure of the hydraulic loader, and each constant-resistance anchor cable is provided with a pressure sensor for detecting the pressure of the constant-resistance anchor cable.
2. The experimental system of claim 1, wherein the constant-resistance anchor cable comprises a plastic sleeve, a first base plate, a second base plate and a nut, one end of the plastic sleeve extends into the inside of the simulation piece, the other end of the plastic sleeve is located in the simulation roadway and is sequentially in threaded connection with the first base plate, the second base plate and the nut, and the pressure sensor is arranged between the first base plate and the second base plate.
3. The experimental system of claim 2, wherein the constant-resistance anchor cable further comprises a resistance member and a rod body, the resistance member is of a cone structure, the diameter of the cone end of the resistance member is smaller than that of the plastic sleeve, and the diameter of the tail end of the resistance member is larger than that of the plastic sleeve;
the cone end of the resistance piece is located from the plastic sleeve one end of the plastic sleeve in the simulation roadway extends into the plastic sleeve, and the rod body is connected with the cone end of the resistance piece and extends out of the other end of the plastic sleeve.
4. The testing system of claim 3, wherein the resistance element is a circular truncated cone structure, the small circular end of the resistance element is a conical end, and the large circular end of the resistance element is a tail end.
5. The experimental system of claim 3, wherein the rod body is a steel strand, and an anchoring plate is connected to one end of the rod body extending out of the plastic sleeve.
6. The experimental system of claim 1, wherein the simulation member is a gypsum structure, and the simulation member is sequentially a limestone layer, a argillaceous sandstone layer, a medium sandstone layer, a sandy shale layer, a medium sandstone layer A, a limestone layer A, a coal layer, a medium sandstone layer B, a sandy shale layer A, a coal layer A, a sandy shale layer B, a medium sandstone layer C and a limestone layer B from top to bottom.
7. The experimental system of claim 6, wherein said simulation roadway is open at said coal seam A.
8. The experimental system of claim 1, wherein two rows of the constant-resistance anchor cables are correspondingly arranged in the axial direction of the simulation roadway, and each row of the constant-resistance anchor cables is arranged on the same circumference in the simulation roadway and distributed in the form of equal central angles.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11771183B2 (en) | 2021-12-16 | 2023-10-03 | Joon Bu Park | Negative Poisson's ratio materials for fasteners |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11771183B2 (en) | 2021-12-16 | 2023-10-03 | Joon Bu Park | Negative Poisson's ratio materials for fasteners |
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