Simple simulation device for loose confined aquifer

Abstract

The utility model relates to the technical field of borehole stressometers, in particular to a simple simulation device for an unconsolidated confined aquifer, which comprises a simple pressure-bearing simulation assembly, the simple pressure-bearing simulation assembly comprises an upper support seat, a first spring, a second spring, a lower support seat and a limit module, the upper support seat is detachably connected with the lower support seat, and the limit module is detachably connected with the upper support seat. The upper supporting seat is detachably connected with the lower supporting seat and located on the upper portion of the interior of the lower supporting seat, the first spring is arranged on the outer surface of the upper portion of the lower supporting seat, the second spring is arranged on the outer surface of the upper portion of the lower supporting seat, and the limiting module penetrates through the lower supporting seat, is detachably connected with the upper supporting seat and is located in the upper supporting seat. Therefore, the problems that traditional simulation equipment is complex in structure and high in cost, a large number of hydraulic pipes are allowed to transmit hydraulic liquid when the device is arranged, an analog simulation test rack is small in internal space and cannot accommodate a complex device, and in addition, the device is too heavy, and the simulation effect is influenced are actively and effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to borehole stress meter technical field especially relates to a loose pressure-bearing aquifer simple simulation device. BACKGROUND

[0002] Similar material simulation test has the advantages of low research cost, short period, intuitive image and strict control of main parameters of simulation object, and therefore, is widely applied in rock mass mechanics and underground engineering, especially in mining discipline. Similar simulation test method is one of the main research methods of mine pressure and rock stratum control.

[0003] The authenticity of the similar simulation experiment result depends on the similarity of the model and the simulated experiment object, or the authenticity of the simulation experiment condition. However, it is difficult to realize the simulation experiment condition of the pressure-bearing aquifer on the simulation frame, which becomes the main bottleneck affecting the research of the mining rock stratum movement adjacent to the pressure-bearing aquifer. The current simulation experiment of the pressure-bearing aquifer is mostly carried out in a relatively closed environment. For example, patent CN105372090A discloses a mining rock stratum movement experiment device adjacent to the pressure-bearing aquifer, which uses a light hydraulic cylinder and two support seats as the main body, controls the hydraulic support pressure to simulate the water pressure of the aquifer, and studies the influence mechanism of the loose pressure-bearing aquifer on the composite fracture of the key layer of the thin bedrock stope. However, although the hydraulic support can clearly and effectively simulate the step subsidence effect of the aquifer rock stratum, the experiment device is complex and has high cost. A large number of hydraulic pipes are used to transmit hydraulic liquid when the device is set, and the internal space of the similar simulation frame is small, which cannot accommodate the complex device. In addition, the device is too heavy, which affects the simulation effect.

[0004] Therefore, the present application provides a loose pressure-bearing aquifer simple simulation device, which has the advantages of simple structure, light material, easy deformation observation, adjustable water pressure, and the like, so as to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a loose pressure-bearing aquifer simple simulation device, which solves the problems of the complex structure and high cost of the traditional simulation equipment, the use of a large number of hydraulic pipes to transmit hydraulic liquid when the device is set, the small internal space of the similar simulation frame, the inability to accommodate the complex device, the heavy device, and the influence on the simulation effect.

[0006] In order to achieve the above object, the utility model discloses a loose pressure-bearing aquifer simple simulation device, including simple pressure-bearing simulation subassembly, the simple pressure-bearing simulation subassembly includes upper support seat, first spring, second spring, lower support seat and limit module, the upper support seat with the lower support seat dismantling is connected, and is located the inside upper of lower support seat, first spring is arranged the upper outer surface of lower support seat, and first spring is also arranged the below of upper support seat, second spring is arranged the upper outer surface of lower support seat, and second spring is arranged one side of first spring, limit module passes through lower support seat with upper support seat dismantling is connected, and located the inside of upper support seat.

[0007] Among them, the upper support seat includes roof beam and inner tube, the inner tube is detachably connected with the lower support seat and located above the inner part of the lower support seat, the roof beam is fixedly connected with the inner tube and located above the inner tube, and the roof beam is arranged above the lower support seat, and the surface of the inner tube is provided with a scale.

[0008] Among them, the lower support seat includes base and outer tube, the outer tube is detachably connected with the inner tube and located on the outer surface of the inner tube, and the outer tube is arranged below the roof beam, the base is fixedly connected with the outer tube and located below the outer tube.

[0009] Among them, the limit module includes a limit long rod screw and a limit nut, the limit long rod screw is arranged inside the inner tube through the base, and the upper end of the limit long rod screw is arranged above the roof beam, the limit nut is detachably connected with the limit long rod screw and located on the upper outer surface of the limit long rod screw.

[0010] Among them, the loose pressure-bearing aquifer simple simulation device further includes a similar simulation test frame, a simulated coal seam, a floor simulation rock layer, a roof simulation rock layer and a counterweight, the similar simulation test frame is detachably connected with the upper support seat and located above the upper support seat, and the similar simulation test frame is detachably connected with the upper support seat, the simulated coal seam is arranged below the inside of the similar simulation test frame, the floor simulation rock layer is arranged inside the similar simulation test frame, and the floor simulation rock layer is further arranged above the simulated coal seam, the roof simulation rock layer is arranged inside the similar simulation test frame, and the roof simulation rock layer is further arranged above the floor simulation rock layer, the counterweight is arranged above the inside of the similar simulation test frame, and the counterweight is further arranged above the roof simulation rock layer.

[0011] The utility model discloses a loose pressure-bearing aquifer simple simulation device, including simple pressure-bearing simulation subassembly, simple pressure-bearing simulation subassembly includes upper support seat, first spring, second spring, lower support seat and limit module, the upper support seat with the lower support seat dismantles and is connected, and is located the inside upper of lower support seat, first spring sets up the upper outer surface of lower support seat, and first spring still sets up the below of upper support seat, second spring sets up the upper outer surface of lower support seat, and second spring sets up one side of first spring, limit module passes through lower support seat with upper support seat dismantles and is connected, and located the inside of upper support seat, because the original structure modification replaces simple pressure-bearing simulation subassembly, thereby will be in the reservation original beneficial effect while actively and effectively solved the traditional simulation equipment structure complex, cost is high, and sets up device when permit a large amount of hydraulic pipe to transmit hydraulic fluid, and similar simulation test frame internal space is small, cannot accommodate complex device, in addition device is too heavy, influence simulation effect's problem. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing briefly introduce, obviously, below description in the drawing only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0013] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model.

[0014] Figure 2 It is the support seat front view of the utility model.

[0015] Figure 3 It is the each part schematic diagram of the utility model. Figure 1

[0016] Figure 4 It is the installation schematic diagram of the test frame of the utility model.

[0017] 1-upper support seat, 11-top beam, 12-inner tube, 21-first spring, 22-second spring, 3-lower support seat, 31-base, 32-outer tube, 4-limit module, 41-limit long rod screw, 42-limit nut, 5-similar simulation test frame, 51-simulation coal seam, 52-bottom plate simulation rock stratum, 53-top plate simulation rock stratum, 54-counterweight. DETAILED DESCRIPTION

[0018] ​Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0019] First embodiment

[0020] Please refer to Figures 1-4 , Figure 1 is the overall three-dimensional structure of the present application, Figure 2 is the front view of the support seat of the present application, Figure 3 is the Figure 1 schematic view of each part of the present application, Figure 4 is the installation schematic view of the test frame adapted to the present application.

[0021] The utility model provides a loose pressure-bearing aquifer simple simulation device, including simple pressure-bearing simulation subassembly, similar simulation test frame 5, simulation coal bed 51, floor simulation rock stratum 52, roof simulation rock stratum 53 and counterweight 54, simple pressure-bearing simulation subassembly includes upper support seat 1, first spring 21, second spring 22, lower support seat 3 and limit module 4, upper support seat 1 includes roof beam 11 and inner tube 12, lower support seat 3 includes base 31 and outer tube 32, limit module 4 includes limit long rod screw 41 and limit nut 42, and the preceding scheme has solved the problem of traditional simulation equipment structure complex, cost is high, and when setting device, a large amount of hydraulic pipe is used to transmit hydraulic liquid, but the internal space of similar simulation test frame 5 is small, cannot accommodate complex device, in addition device is too heavy, and the problem of influencing simulation effect, it can be understood that the preceding scheme can be in simulation test, with sand as aggregate, calcium carbonate-gypsum as cementing material, borax as retarder, simulation rock stratum is laid layer by layer from below to above in similar simulation test frame 5, and pressure-bearing aquifer simulation device is assembled, and is limited in the limiting hole with long screw, a plurality of pressure-bearing aquifer simulation devices are buried on the floor simulation rock stratum 52 on the upper portion of similar simulation test frame 5, and then the roof simulation rock stratum 53 of aquifer is laid in turn, after the floor simulation rock stratum 52 and the roof simulation rock stratum 53 are laid, under the natural placing condition, place 10 days air dry, remove the limiting screw before test, ensure that spring can release pressure, and the counterweight 54 is placed on the roof simulation rock stratum 53, then stabilize pressure 2h, similar simulation test frame 5 and the plurality of pressure-bearing aquifer simulation devices that bury with the aquifer in the simulation rock stratum 52 on the upper portion of similar simulation test frame 5, a plurality of loose pressure-bearing aquifer simple simulation devices are arranged in turn along the length direction of similar simulation test frame 5, the length of roof beam 11 and base 31 is equal to the width H of similar simulation test frame 5, the width of roof beam 11 and base 31 is 25mm, roof beam 11 and base 31 are rectangular steel plates, the abutting pressure-bearing aquifer and the abutting pressure-bearing aquifer simulation device are connected, the end of roof beam 11 of adjacent pressure-bearing aquifer simulation device is contacted, support seat 1 / 3 includes inner tube 12 and outer tube 32, the material of inner tube 12 and outer tube 32 is galvanized pipe, the upper end of inner tube 12 is fixed on the lower surface of roof beam 11 through welding, the lower section of outer tube 32 is fixed on the upper surface of base 31 through welding, the outer diameter of inner tube 12 is 14mm, the inner diameter of outer tube 32 is slightly larger than the outer diameter of inner tube 12, the lower end of inner tube 12 can slide up and down along the inner wall of outer tube 32, the height of inner tube 12 is 125mm, the height of outer tube 32 is 120mm, the wall thickness of inner tube 12 cannot be less than 2mm, can bear the load of upper rock layer, the surface of inner tube 12 is equipped with scale,The value of the scale read can be used to calculate the vertical deformation of the bottom plate simulation rock stratum 52, and the minimum height of the support base is 140mm. When simulating the pressure relief effect of coal seam mining, the simulation of aquifer floor begins to sink, the base also sinks, and the spring also stretches to give force to simulate the water pressure of the aquifer. Thus, while retaining the original beneficial effects, it actively and effectively solves the problems of complex structure, high cost of traditional simulation equipment, and a large number of hydraulic pipes for transmitting hydraulic fluid when setting up the device. The internal space of the similar simulation test frame 5 is small and cannot accommodate complex devices, and in addition, the device is too heavy, affecting the simulation effect.

[0022] For this specific embodiment, the upper support base 1 is detachably connected to the lower support base 3 and located above the inside of the lower support base 3. The first spring 21 is arranged on the upper outer surface of the lower support base 3, and the first spring 21 is also arranged below the upper support base 1. The second spring 22 is arranged on the upper outer surface of the lower support base 3, and the second spring 22 is arranged on one side of the first spring 21. The limiting module 4 is detachably connected to the upper support base 1 through the lower support base 3 and located inside the upper support base 1.

[0023] Wherein, the inner tube 12 is detachably connected with the lower support base 3 and located above the inside of the lower support base 3, the top beam 11 is fixedly connected with the inner tube 12 and located above the inner tube 12, and the top beam 11 is arranged above the lower support base 3, the surface of the inner tube 12 is provided with a scale.

[0024] Secondly, the outer tube 32 is detachably connected with the inner tube 12 and located on the outer surface of the inner tube 12, and the outer tube 32 is arranged below the top beam 11. The base 31 is fixedly connected with the outer tube 32 and located below the outer tube 32.

[0025] At the same time, the limiting long rod screw 41 is arranged inside the inner tube 12 through the base 31, and the upper end of the limiting long rod screw 41 is arranged above the top beam 11. The limiting nut 42 is detachably connected with the limiting long rod screw 41 and located on the upper outer surface of the limiting long rod screw 41.

[0026] In addition, the similar simulation test frame 5 is detachably connected with the upper support seat 1 and is located above the upper support seat 1, and the similar simulation test frame 5 and the upper support seat 1, the simulated coal seam 51 is arranged inside and below the similar simulation test frame 5, the floor simulation rock stratum 52 is arranged inside the similar simulation test frame 5, and the floor simulation rock stratum 52 is also arranged above the simulated coal seam 51, the roof simulation rock stratum 53 is arranged inside the similar simulation test frame 5, and the roof simulation rock stratum 53 is also arranged above the floor simulation rock stratum 52, and the counterweight 54 is arranged inside and above the similar simulation test frame 5, and the counterweight 54 is also arranged above the roof simulation rock stratum 53.

[0027] When using this invention for simulation testing, sand is used as aggregate, calcium carbonate-gypsum as binder, and borax as retarder. Simulated rock layers are laid layer by layer from bottom to top within the similar simulation test frame 5. A pressurized aquifer simulation device is assembled and secured with long screws. Several pressurized aquifer simulation devices are embedded in the bottom simulated rock layer 52 at the top of the similar simulation test frame 5. Then, the top simulated rock layer 53 of the aquifer layer is laid sequentially. After the bottom simulated rock layer 52 and the top simulated rock layer 53 are laid, they are left to air dry for 10 days under natural conditions. Before the test, the securing screws are removed to ensure the springs can release pressure. The top simulated rock layer 53 is then... The counterweight 54 is placed on the simulated rock stratum 53, and the pressure is stabilized for 2 hours. The similar simulation test frame 5 and several confined aquifer simulation devices embedded in the simulated rock stratum 52 above the similar simulation test frame 5, along with several loose confined aquifer simple simulation devices, are arranged sequentially along the length of the similar simulation test frame 5. The lengths of the top beam 11 and the base 31 are equal to the width H of the similar simulation test frame 5. The widths of the top beam 11 and the base 31 are 25 mm. The top beam 11 and the base 31 are rectangular steel plates. At the junction of adjacent confined aquifers and the base of the simulation device, adjacent confined aquifer models... The ends of the top beam 11 of the proposed manor are in contact with each other. The support base 1 / 3 includes the inner tube 12 and the outer tube 32. The inner tube 12 and the outer tube 32 are made of galvanized pipe. The upper end of the inner tube 12 is fixed to the lower surface of the top beam 11 by welding. The lower section of the outer tube 32 is fixed to the upper surface of the base 31 by welding. The outer diameter of the inner tube 12 is 14mm, and the inner diameter of the outer tube 32 is slightly larger than the outer diameter of the inner tube 12. The lower end of the inner tube 12 can slide up and down along the inner wall of the outer tube 32. The height of the inner tube 12 is 125mm, the height of the outer tube 32 is 120mm, and the wall thickness of the inner tube 12 cannot be less than 2mm. It can withstand the load of the upper rock strata. The surface of the inner tube 12 is marked with a scale. By reading the scale value, the vertical deformation of the simulated rock strata 52 on the bottom plate can be calculated. The minimum height of the support is 140mm. When the simulated coal seam is affected by the depressurization, the simulated aquifer bottom plate begins to sink, and the base also sinks. The spring is stretched to apply force to simulate the water pressure of the aquifer. In this way, while retaining the original beneficial effects, it actively and effectively solves the problems of traditional simulation equipment having a complex structure, high cost, and requiring a large number of hydraulic pipes to transmit hydraulic fluid when setting up the device. Furthermore, the internal space of the similar simulation test frame 5 is small and cannot accommodate complex devices. In addition, the device is too heavy, which affects the simulation effect.

[0028] The above disclosed is only a preferred embodiment of the utility model, of course, cannot with this to limit the utility model right scope, the person skilled in the art can understand that the whole or part processes of the above-mentioned embodiment are realized, and the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.

Claims

1. A loose confined aquifer simple simulation device, characterized in that, it comprises a simple pressure simulation assembly, the simple pressure simulation assembly comprises an upper support seat, a first spring, a second spring, a lower support seat and a limiting module, the upper support seat is detachably connected with the lower support seat and is located above the inside of the lower support seat, the first spring is arranged on the upper surface of the lower support seat, and the first spring is also arranged below the upper support seat, the second spring is arranged on the upper surface of the lower support seat, and the second spring is arranged on one side of the first spring, the limiting module is detachably connected with the upper support seat through the lower support seat and is located inside the upper support seat.

2. The loose confined aquifer simple simulation device according to claim 1, characterized in that, the upper support seat comprises a top beam and an inner tube, the inner tube is detachably connected with the lower support seat and is located above the inside of the lower support seat, the top beam is fixedly connected with the inner tube and is located above the inner tube, and the top beam is arranged above the lower support seat, and the surface of the inner tube is provided with a scale.

3. The loose confined aquifer simple simulation device according to claim 2, characterized in that, the lower support seat comprises a base and an outer tube, the outer tube is detachably connected with the inner tube and is located on the outer surface of the inner tube, and the outer tube is arranged below the top beam, and the base is fixedly connected with the outer tube and is located below the outer tube.

4. The loose confined aquifer simple simulation device according to claim 3, characterized in that, the limiting module comprises a limiting long rod screw and a limiting nut, the limiting long rod screw is arranged in the inner tube through the base, and the upper end of the limiting long rod screw is arranged above the top beam, and the limiting nut is detachably connected with the limiting long rod screw and is located on the upper surface of the limiting long rod screw.

5. The loose confined aquifer simple simulation device according to claim 4, characterized in that, the loose confined aquifer simple simulation device further comprises a similar simulation test frame, a simulated coal seam, a floor simulated rock stratum, a roof simulated rock stratum and a counterweight, the similar simulation test frame is detachably connected with the upper support seat and is located above the upper support seat, the similar simulation test frame is detachably connected with the upper support seat, the simulated coal seam is arranged below the inside of the similar simulation test frame, the floor simulated rock stratum is arranged in the inside of the similar simulation test frame and is also arranged above the simulated coal seam, the roof simulated rock stratum is arranged in the inside of the similar simulation test frame and is also arranged above the floor simulated rock stratum, the counterweight is arranged above the inside of the similar simulation test frame and is also arranged above the roof simulated rock stratum.

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