CN206974835U - A kind of adjustable anchor rod double shear Mechanics Performance Testing simulator - Google Patents

Abstract

It the utility model is related to a kind of adjustable anchor rod double shear Mechanics Performance Testing simulator.The problem of can effectively solve prior art wastes time and energy, while accuracy rate is low, its technical scheme solved is, including base, bottom plate, height adjustable device, displacement transducer, hydraulic cylinder, fixed plate, concrete sample fixed plate, connecting rod and nut.Experimental rig can coordinate the external pressure machine of different model to carry out simulated test, the prestressing force at anchor pole both ends can be regulated and controled according to experiment demand, during experiment, external pressure machine and fixed plate perpendicular contact, and pressure is continuously increased to simulate the double-shear effect to anchor pole, it disclosure satisfy that the double-shear simulated test of variety classes anchor pole, the utility model is workable, low manufacture cost, practicality is high, the generation of suspension roof support failure can be effectively reduced, or the Geotechnical Engineering such as water conservancy, tunnel, mine provides scientific basis.

Description

An adjustable double-shear mechanical performance test simulation device for bolts

technical field

The utility model relates to the field of coal mine roadway support, in particular to an adjustable double-shear mechanical property test simulation device of an anchor.

Background technique

Since the 1990s, bolt support has been widely used in coal mines due to its remarkable technical and economic advantages, and it is a revolution in roadway support. A large number of experts and scholars have done a lot of work in support theory, parameter design methods and effect monitoring, and have achieved many meaningful results. However, bolt support failure still occurs from time to time. Anchor shear failure has become the main form of roadway roof anchor failure. However, the underground environment of coal mines is quite harsh, and it is difficult to obtain the above conditions from on-site inspections due to limited conditions. Usually, in order to carry out relevant research, similar laboratory simulation tests are required to study mechanical phenomena such as deformation, movement and failure of the surrounding rock of the roadway, and to analyze the mechanical characteristics of the shear stress acting on the bolt. At present, most studies use finite element simulation analysis, which deviates from the actual engineering due to the problem of material parameter assignment and boundary conditions. Although some test devices can simulate some actual engineering conditions, they have problems such as single function and inconvenient operation. Therefore, it is imperative to develop a comprehensive simulation test device for shear mechanical properties of bolts with reasonable structure and easy to use.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art, and provide an adjustable bolt double-shear mechanical performance test simulation device, which can effectively simulate the impact of the bolt being sheared by the surrounding rock.

The technical scheme solved by the utility model is to include a base, a bottom plate, a height-adjustable device, a displacement sensor, a hydraulic cylinder, a fixing plate, a concrete specimen fixing plate, a connecting rod and a nut, and it is characterized in that the base is made of high-strength Made of steel, the first concrete specimen and the second concrete specimen are respectively fixed by the first concrete specimen fixing plate and the second concrete specimen fixing plate, and placed on the height-adjustable device, and finally fixed by the fixing plate and the bottom plate The overall fixing is carried out by connecting rods, the displacement sensor is fixed on the base, the anchor rod is anchored in the first concrete specimen and the second concrete specimen, and prestress is applied through hydraulic cylinders at both ends of the anchor rod.

The utility model has the advantages of novel structure, low cost, strong practicability and convenient operation, can be widely used in performance tests of various bolts, has reliable test results, and can effectively reduce shear fracture of bolts in the production process.

Description of drawings

Fig. 1 is a perspective view of the overall structure of the utility model.

Fig. 2 is a top view of the overall structure of the utility model.

Fig. 3 is a front view of the overall structure of the utility model.

Fig. 4 is a side view of the overall structure of the utility model.

detailed description

Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.

Given by Figures 1-4, the utility model includes a base, a base plate, a height-adjustable device, a displacement sensor, a hydraulic cylinder, a fixing plate, a concrete specimen fixing plate, connecting rods and nuts, and is characterized in that the base 1 Processed from high-strength steel, the first concrete specimen 7 and the second concrete specimen 8 are fixed by the first concrete specimen fixing plate 13 and the second concrete specimen fixing plate 5 respectively, and placed on the height-adjustable device 4 Finally, the fixed plate 14 and the bottom plate 2 are integrally fixed through the connecting rod 10, the displacement sensor 6 is fixed on the base 1, the anchor rod 11 is anchored in the first concrete specimen 7 and the second concrete specimen 8, and through the anchor Hydraulic cylinders 15 at both ends of the rod 11 apply prestress.

The base 1 is processed from 20mm high-strength steel, and its overall size is 1100mm×450mm×110mm, and the four corners on the surface in contact with the bottom plate 2 are cut off in the form of a rectangle of 300mm×70mm. In order to ensure the practicability of the test device.

The displacement sensor 6 is used in conjunction with the position magnet 12 to ensure real-time monitoring of the shear displacement.

The first concrete specimen fixing plate 13 is fixed horizontally with the position magnet 12 to ensure consistency with the shear displacement.

The first concrete test piece fixing plate 13 and the second concrete test piece fixing plate 5 play a role of fixing and forming during the pouring process of the first concrete test piece 7 and the second concrete test piece 8 .

The hydraulic cylinder 15 is fixed at both ends of the anchor rod 11, and different prestress can be applied to ensure the test effect.

The hydraulic cylinder 15 is connected to an external pressurizing device through the first external interface 16, and the application of pressure is constantly adjusted according to the test simulation situation.

The height of the adjustable height device 4 is 100 mm, and it is connected to the external pressurizing device through the second external interface 3, and its stroke can reach 60 mm to adjust different shearing heights.

The diameter of the connecting rod 10 is φ28mm, which is processed by high-strength rigid material, and is fixed on the fixed plate 14 and the bottom plate 2 by nuts 9 .

The working process of the utility model is as follows: before doing the experiment, it is necessary to detect the hydraulic loading device to ensure that it can be used normally. Assemble the simulated materials prepared in advance and place them on the external press, and adjust the height of the height-adjustable device 4 to meet the requirements of the test, and anchor the anchor rod 11 to the first concrete specimen 7 and the second concrete specimen 8 , and apply a corresponding amount of prestress to the two ends of the anchor rod 11. During the test, the external press is in vertical contact with the fixed plate 13, and the pressure is continuously increased to simulate the double shearing effect on the anchor rod 11. According to different anchor rods The experimental research on the rod 11 can effectively analyze the working characteristics of the anchor rod 11 .

The utility model has the advantages of novel structure, low cost and strong operability, and can accurately measure the working characteristics of the anchor rod 11 under the shearing action, effectively reducing the failure of the anchor rod support, and has good economic and social benefits. benefit.

Claims (8)

1. a kind of adjustable anchor rod double shear Mechanics Performance Testing simulator, including base, bottom plate, height adjustable device, displacement Sensor, hydraulic cylinder, fixed plate, concrete sample fixed plate, connecting rod and nut, it is characterised in that described base（1）By High strength steel is process, the first concrete sample（7）With the second concrete sample（8）Pass through the first concrete sample respectively Fixed plate（13）With the second concrete sample fixed plate（5）It is fixed, and it is positioned over height adjustable device（4）On, finally by fixing Plate（14）And bottom plate（2）Pass through connecting rod（10）Carry out overall fixed, displacement transducer（6）It is fixed on base（1）On, anchor pole （11）It is anchored in the first concrete sample（7）With the second concrete sample（8）In, and pass through anchor pole（11）The hydraulic cylinder at both ends （15）Apply prestressing force.

A kind of 2. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute State base（1）It is process by 20mm high strength steel, and is cut out in the form of rectangle and remove itself and bottom plate（2）That face of contact On four corners, to meet test requirements document.

A kind of 3. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute Displacement sensors（6）With position magnet（12）It is used cooperatively, to ensure the real-time monitoring of shear displacemant.

A kind of 4. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute State the first concrete sample fixed plate（13）With position magnet（12）Level is fixed, to ensure the uniformity with shear displacemant.

A kind of 5. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute State hydraulic cylinder（15）It is fixed on anchor pole（11）Both ends, different prestressing force can be applied, with guarantee test effect.

A kind of 6. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute State hydraulic cylinder（15）Pass through the first external interface（16）It is connected with external pressurized device, to ensure to apply different prestressing force.

A kind of 7. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute State height adjustable device（4）Pass through the second external interface（3）It is connected with external pressurized device, to adjust different shear heights.

A kind of 8. adjustable anchor rod double shear Mechanics Performance Testing simulator according to claim 1, it is characterised in that institute State connecting rod（10）It is process using high intensity rigid material, and passes through nut（9）It is fixed on fixed plate（14）And bottom plate（2） On.