CN203732293U - Grading and yielding similar material simulation support device based on air pressure core mold - Google Patents
Grading and yielding similar material simulation support device based on air pressure core mold Download PDFInfo
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- CN203732293U CN203732293U CN201320860720.6U CN201320860720U CN203732293U CN 203732293 U CN203732293 U CN 203732293U CN 201320860720 U CN201320860720 U CN 201320860720U CN 203732293 U CN203732293 U CN 203732293U
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Abstract
A grading and yielding similar material simulation support device based on an air pressure core mold belongs to the technical field of mining. The device comprises a gas pump, a high-pressure pipe, an inverted valve, a high-pressure four-way pipe, an air pressure core mold, a pressure relief valve and a pressure regulating gas-pressure meter. The gas pump is connected with the inverted valve through the high-pressure pipe. The other end of the inverted valve is connected with the high-pressure four-way pipe through the high-pressure pipe. The air pressure core mold, the pressure regulating gas-pressure meter and the air pressure core mold are respectively connected with the other three ends of the high-pressure four-way pipe through the high-pressure pipe. The gas pump supplies pressure through the high-pressure pipe. Air flow is controlled to enter by the inverted valve. Support pressure is controlled by the pressure regulating gas-pressure meter. When the yielding reaches a certain pressure value, the pressure regulating gas-pressure meter can control and regulate also. The device can achieve support simulation after tunnel excavation in three-dimensional or plane similar material simulation experiment controlled by mine ground pressure and rock stratum, and can carry out grading support for simulation surrounding rock of tunnels.
Description
Technical field
The utility model belongs to mining technique field, particularly a kind of all pressures that realized by air pressure core and allow and press equivalent material simulating prop device.
Background technology
Equivalent material simulating is tested as Study of Strata movement distortion rule, a kind of means of supporting effect of roadway, it is taking similarity theory as foundation, with with coal petrography, the similar material of mechanical property of support material, make model by similarity criterion required between prototype and model, then in simulation, dig tunnel or surrounding rock supporting, observe the distortion of roof strata and country rock, the depression situation on displacement and destruction situation and earth's surface, analyze accordingly what happens in prototype, there is cost low, cycle is short, efficiency is high, easy and simple to handle, intuitive is strong, can get profit and test, observation is convenient and can study factor by manual control, the one of surrounding rock supporting research that has developed into strata movement is important, effective means.
Supporting (uniformly distributed load) and yield supporting are all pressed in can not realize in traditional analog simulation experiment, the surrounding rock failure phenomenon analysis of particularly all pressing after supporting for applying of circular tunnel in deep mining, be subject to roadway shape, the restriction in digging space, often adopt and apply galvanized wire (or iron wire)+solid gum in model inside and simulate the mode of all pressing prop carrying out before experiment device, can not realize yield supporting, can not accurately reflect the operation of the rear supporting of first excavation in actual roadway excavation process, more can not simulate the circular tunnel surrounding rock failure deformation rule under Mining in Deep-lying Conditions.
Utility model content
For the problems referred to above, the utility model is being carried out on the basis of circular tunnel equivalent material simulating experiment under Mining in Deep-lying Conditions, be applicable to three-dimensional dimension equivalent material simulating experiment table and plane equivalent material simulating experiment table, how apply all and press (can allow pressures) prop for circular tunnel and creatively propose one all pressing the problem of deformation of the surrounding rock in tunnel destruction under supporting and yield supporting condition and all press (can allow pressure) supporting equivalent material simulating prop structure.
A kind of all pressures that realized by air pressure core of the utility model and allow and press equivalent material simulating prop device, by air-source pump, high-voltage tube, stop check valve, high pressure four-way pipe fitting, air pressure core, unload pressure exhaust valve pressure-adjustable rain glass and form, wherein air-source pump is connected with stop check valve by high-voltage tube, the other end of stop check valve be connected with high pressure four-way piece by high-voltage tube, air pressure core, pressure-adjustable rain glass, exhaust pressure-release valve are connected by other three ends of high-voltage tube and high pressure four-way piece respectively; Air-source pump is by high-voltage tube to the voltage supply of air pressure core, and air-flow is entered by stop check valve control, and supporting pressure size, by the control of pressure-adjustable rain glass, allows while being pressed onto certain pressure value, also can be by pressure regulation rain glass regulating and controlling.
Described air pressure core is mainly vulcanized and made by rubber and fabric reinforcement, it is aerated core used in engineering, bear pressure and be not less than 0.5MPa, its shape and size need to be determined according to the shape and size in the tunnel of equivalent material simulating experiment table and excavation simulation.
When work, air pressure core is put into the circular tunnel after excavation, can carry out and all press supporting or yield supporting experimental work.
While all pressing support work, provide high-pressure air source by air-source pump, before device is started working, open stop check valve, close and unload pressure exhaust valve.High pressure draught enters air pressure core after entering four-way piece by high pressure and stop check valve, pressure-adjustable rain glass shows pressure, meet or exceed after design pressure value, stop air-source pump, the all pressures supporting pressure providing is provided by air pressure core, adjustable pressure table control valve carries out pressure adjusting, reaches design pressure value and can carry out the work such as corresponding monitoring.After experiment completes, by unloading pressure exhaust valve, the waste gas in air pressure core is discharged, complete experimental work content.
When yield supporting work, by all pressing support work principle, adjustable pressure table control valve, makes the pressure decreased in air pressure core press size to required allowing, and can carry out corresponding monitoring.
Device of the present utility model can be realized the simulation of prop after roadway excavation in the three-dimensional of rock pressure [in mine and strata control and the experiment of plane equivalent material simulating, can implement all to press supporting to the roadway surrounding rock of simulation, can simulate the prop of Support Resistance below 0.5MPa.Also can simulate prop yield supporting technology,, under existing Support Resistance value, reduce Support Resistance size, the supporting effect of observational study prop to country rock simultaneously.Also have easy to usely, economy and durability, can be repeatedly used, and unaerated can softly be shunk, folding, curling arbitrarily.
Brief description of the drawings
Fig. 1 is all pressures that realized by air pressure core and allows and press equivalent material simulating prop apparatus main body structural drawing, wherein 1 air-source pump, and 2 high-voltage tubes, 3 stop check valves, 4 high pressure four-way pipe fittings, 5 air pressure cores, 6 unload pressure exhaust valve, 7 pressure-adjustable rain glasss;
Fig. 2 top board principle stress change curve,
Fig. 3 base plate principle stress change curve.
Embodiment
In the utility model embodiment, air pressure core used is all in the customization of the southeast, Yu Shan town, Changshu City rubber molding plant, and wherein die body draft tube adopts 2 points of copper standard components.
High-voltage tube adopts resistance to this PU tracheae in mountain, Taiwan, and high-voltage tube two end connectors adopt 2 points of copper standard component joints.
Air-source pump adopts Shanghai ancient cooking vessel prestige V-0.12/8 electric air pump.
Stop check valve adopts the special 2 points of non-return valve of air compressor machine.
Four-way piece adopts 2 points of copper standard component four-way pieces.
Pressure-release valve adopts the pneumatic fast-discharge valve of resistance to this QE-01 type in mountain.
A kind of all pressures that realized by air pressure core of the utility model and allow and press equivalent material simulating prop device, as shown in Figure 1, by air-source pump 1, high-voltage tube 2, stop check valve 3, high pressure four-way pipe fitting 4, air pressure core 5, unload pressure exhaust valve 6 pressure-adjustable rain glasss 7 and form, wherein air-source pump 1 is connected with stop check valve 3 by high-voltage tube 2, the other end of stop check valve 3 be connected with high pressure four-way piece 4 by high-voltage tube 2, air pressure core 5, pressure-adjustable rain glass 7, exhaust pressure-release valve 6 are connected with other three ends of high pressure four-way piece 4 by high-voltage tube 2 respectively; Air-source pump 1 is by high-voltage tube 2 to 5 voltage supply of air pressure core, and air-flow is controlled and entered by stop check valve 3, and supporting pressure size is controlled by pressure-adjustable rain glass 7, allows while being pressed onto certain pressure value, also can be by pressure regulation rain glass 7 regulating and controlling.
Described air pressure core is mainly vulcanized and made by rubber and fabric reinforcement, it is aerated core used in engineering, bear pressure and be not less than 0.5MPa, its shape and size need to be determined according to the shape and size in the tunnel of equivalent material simulating experiment table and excavation simulation.
When work, air pressure core 5 is put into the circular tunnel after excavation, can carry out and all press supporting or yield supporting experimental work.
While all pressing support work, provide high-pressure air source by air-source pump 1, before device is started working, open stop check valve 3, close and unload pressure exhaust valve 6.High pressure draught enters air pressure core 5 after entering high pressure four-way piece 4 by high-voltage tube 2 and stop check valve 3, pressure-adjustable air pressure 7 tables show pressure, meet or exceed after design pressure value, stop air-source pump 1, intend by air pressure core 5 all pressures supporting pressure providing, regulate gas-pressure adjustable table 7 control valve to carry out pressure adjusting, reach design pressure value and can carry out the work such as corresponding monitoring.After experiment completes, by unloading pressure exhaust valve 6, the waste gas in air pressure core 5 is discharged, complete experimental work content.
When yield supporting work, by all pressing support work principle, regulate pressure-adjustable rain glass 7 control valves, make the pressure decreased in air pressure core 5 press size to required allowing, can carry out corresponding monitoring.
The utility model has carried out many Equivalent Materials Testings in underground works comprehensive simulation test system, adopts this device to carry out stability of surrounding rock and supporting effect research after all pressures supporting of circular tunnel surrounding rock supporting body and yield supporting.This device has carried out many Equivalent Materials Testings in underground works comprehensive simulation test system, adopts this device to carry out stability of surrounding rock and supporting effect research after all pressures supporting of circular tunnel surrounding rock supporting body and yield supporting.
Embodiment 1
In deep, colliery high stress tunnel surrounding rock failure mechanism and control technology research thereof, compose and deposit texture feature and according to analog material test condition design experiment scheme, three-dimensional model is carried out to hierarchical loading according to the residing rock stratum in primary stress field feature, tunnel of mine, build initial initial stress field, analyze destructive characteristics and the form of roadway surrounding rock; Analyze the rear country rock stress distribution feature of roadway excavation process and excavation and rule; Analyze stability of the roadway state under different supporting pressure and yield supporting effect.Result of study meets actual condition of mines, has obtained Expected Results.
All press supporting experiment:
Test adopts and first loads the test method of excavating afterwards, considers that the compacting densification of analog material needs the stress of regular hour process and load plate simultaneously, in order to avoid there is testing element and harness damage, adopts hierarchical loading to reach design load.
Primary stress field is that horizontal stress is greater than perpendicular stress condition σ
y> σ
x> σ
z(in simulation test, the excavation direction in regulation tunnel is X-direction, it is loading surface before and after testing table, left and right directions is Y direction, it is testing table left and right loading surface, above-below direction is Z-direction, be the upper and lower loading surface of testing table), horizontal stress is 33.75MPa, perpendicular stress is 22.5MPa (mining depth is 900m).Stress similitude is than for 1:70, and the initial Support Resistance of actual prop is 0.3MPa, and Support Resistance is set is 0.004MPa to air pressure core.
Taking the principle stress change curve of roof station as example as shown in Figure 2, the principle stress variation characteristic of corresponding measuring point is in table 1.
Table 1 roof station principle stress variation characteristic table
Yield supporting experiment:
Yield supporting experiment starting condition and correlation parameter with all press supporting experiment consistent, difference is to change the Support Resistance of prop, observes deformation of the surrounding rock in tunnel destruction situation.As shown in Figure 3, the principle stress variation characteristic of corresponding measuring point is in table 2 for base plate principle stress change curve.
Table 2 floor station principle stress variation characteristic table
As seen from the experiment:
(1) deformation failure of roadway surrounding rock is a progressive process, discrete, initial roof destruction is the prerequisite that later stage country rock produces shearing slip crack, and whole destructive process can be described as equally: intersection-tunnel unstable failure is sharply expanded in crippling-generation shearing crack-crack.
(2) different positions shows different deformation behaviours, significant difference.The starting point of distortion starts from roof and floor position, and along with the continuous adjustment of stress changes, crack quantity increases, and extension is constantly expanded in roadway surrounding rock depths.
(3) position in shearing slip crack in tunnel in the surperficial 10cm scope of (being equivalent to actual range 3m), and crack is symmetrical shape and distributes, form is to cover and deposit parallel ellipticity with rock stratum, the spacing of every shearing crack is on average in 2cm left and right, country rock is divided into obvious burst region, illustrates that horizontal stress has played leading role to the deformation failure in tunnel.
(4) after roadway excavation, applying immediate support can make the stress state on country rock surface effectively be improved, increase the radial stress in deep wall rock, reduce tangential stress, thereby slow down stress concentration degree, dwindle deviator stress, thereby made country rock show to greatest extent the Surrounding Rock Strength feature under three dimension stress state, be conducive to the formation of country rock self bearing structure.
Compose and deposit texture feature and according to analog material test condition design experiment scheme, three-dimensional model is carried out to hierarchical loading according to the residing rock stratum in primary stress field feature, tunnel of mine, build initial initial stress field, analyze destructive characteristics and the form of roadway surrounding rock; Analyze the rear country rock stress distribution feature of roadway excavation process and excavation and rule; Analyze stability of the roadway state under different supporting pressure and yield supporting effect.Result of study meets actual condition of mines, has obtained Expected Results.
Claims (2)
1. all pressures that realized by air pressure core and allow and press equivalent material simulating prop device, it is characterized in that by air-source pump, high-voltage tube, stop check valve, high pressure four-way pipe fitting, air pressure core, unload pressure exhaust valve pressure-adjustable rain glass and form, wherein air-source pump is connected with stop check valve by high-voltage tube, the other end of stop check valve be connected with high pressure four-way piece by high-voltage tube, air pressure core, pressure-adjustable rain glass, exhaust pressure-release valve are connected by other three ends of high-voltage tube and high pressure four-way piece respectively; Air-source pump is by high-voltage tube to the voltage supply of air pressure core, and air-flow is entered by stop check valve control, and supporting pressure size, by the control of pressure-adjustable rain glass, allows while being pressed onto certain pressure value, also can be by pressure regulation rain glass regulating and controlling.
2. all pressures that realized by air pressure core and allow and press equivalent material simulating prop device, it is characterized in that described air pressure core is mainly vulcanized and made by rubber and fabric reinforcement, it is aerated core used in engineering, bear pressure and be not less than 0.5MPa, its shape and size need to be determined according to the shape and size in the tunnel of equivalent material simulating experiment table and excavation simulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860720.6U CN203732293U (en) | 2013-12-24 | 2013-12-24 | Grading and yielding similar material simulation support device based on air pressure core mold |
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| CN201320860720.6U CN203732293U (en) | 2013-12-24 | 2013-12-24 | Grading and yielding similar material simulation support device based on air pressure core mold |
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| CN203732293U true CN203732293U (en) | 2014-07-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698149A (en) * | 2013-12-24 | 2014-04-02 | 辽宁工程技术大学 | Pressures-equalizing and pressure-yielding similar material simulation supporting body device realized by air pressure core mold |
| CN107024345A (en) * | 2017-04-06 | 2017-08-08 | 北京机械设备研究所 | A kind of experimental method pressed under simulation water |
-
2013
- 2013-12-24 CN CN201320860720.6U patent/CN203732293U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698149A (en) * | 2013-12-24 | 2014-04-02 | 辽宁工程技术大学 | Pressures-equalizing and pressure-yielding similar material simulation supporting body device realized by air pressure core mold |
| CN107024345A (en) * | 2017-04-06 | 2017-08-08 | 北京机械设备研究所 | A kind of experimental method pressed under simulation water |
| CN107024345B (en) * | 2017-04-06 | 2019-02-01 | 北京机械设备研究所 | A kind of experimental method that simulation is pressed under water |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20151224 |
|
| EXPY | Termination of patent right or utility model |