CN114283666A - Experimental device and method for simulating gas eruption - Google Patents
Experimental device and method for simulating gas eruption Download PDFInfo
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- CN114283666A CN114283666A CN202111611397.4A CN202111611397A CN114283666A CN 114283666 A CN114283666 A CN 114283666A CN 202111611397 A CN202111611397 A CN 202111611397A CN 114283666 A CN114283666 A CN 114283666A
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Abstract
The invention discloses an experimental device for simulating gas eruption, which comprises a soil container, a gas sampling device and a gas sampling device, wherein the soil container is provided with an opening and is used for containing a soil sample; the pressure box is arranged in the soil container, and an opening is formed in the pressure box; the metal diaphragm is connected in the opening of the pressure box, and can block and limit the gas in the pressure box to be discharged and relieve the limitation on the gas in the pressure box when the pressure in the pressure box is not less than the set pressure; the gas eruption device and the method can realize the eruption experiment of the gas quantity, the gas pressure and the soil layer thickness with preset design in the sample loading process, record the movement process of the soil sample through the monitoring of the camera, open the gas steel cylinder when the simulated gas eruption experiment is carried out, adjust the pressure of gas filled in the pressure box through the pressure reducing valve, and provide technical support for researching the measurement data of the gas eruption after the metal diaphragm is broken and opened.
Description
Technical Field
The invention relates to the technical field of gas eruption experiments, in particular to an experimental device and method for simulating gas eruption.
Background
Exploration has definitely shown that a large amount of solid methane, carbon dioxide and other substances are stored in a seabed soil layer and a land frozen soil layer. When environmental conditions such as temperature and crustal pressure change, these substances undergo phase change to become gas, the pressure rises, and the gas is rapidly ejected from the ground surface, causing large-scale geological disasters. At present, no experimental device and method for simulating the disasters exist, and the invention fills the gap.
Disclosure of Invention
The invention aims to provide an experimental device and method for simulating gas eruption, which aim to solve the technical problem that the simulation experiment aiming at soil layer gas eruption is difficult in the prior art.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
an experimental device for simulating gas eruption comprises
The soil container is provided with an opening and is used for containing a soil sample;
the pressure box is arranged in the soil container, an opening is formed in the pressure box, and the pressure box is used for introducing gas to increase the internal pressure of the pressure box;
the metal diaphragm is connected in the opening of the pressure box, and can block and limit the gas in the pressure box to be discharged and relieve the limitation on the gas in the pressure box when the pressure in the pressure box is not less than the set pressure;
the gas steel cylinder is communicated with the pressure box and is used for filling gas with metered pressure into the pressure box;
the camera is used for recording the movement process of the soil sample after the pressure of the pressure box is relieved;
the whiteboard, the horizontal line of different heights has been marked on the whiteboard, the whiteboard is used for measuring the position of motion of soil sample at different moments.
In a preferred embodiment of the present invention, a pressure reducing valve is connected to an outlet of the gas cylinder, and the pressure reducing valve is used to adjust and control a pressure of the gas filled in the pressure chamber.
The invention also provides an experimental method of the experimental device based on the simulated gas eruption, which comprises the following steps:
s100, adding a soil sample for the experiment into a soil container according to a soil layer of the experiment until the soil reaches a designed height, and correspondingly placing a white board and a camera on two side surfaces of the soil container;
s200, inflating the pressure box through a gas steel cylinder;
s300, when the pressure of the gas in the pressure box is not less than the set pressure, the metal diaphragm relieves the limitation on the gas in the pressure box and rushes out a soil sample through the gas;
s400, analyzing the time-displacement process of the soil sample movement according to the soil sample movement shot by the camera and the scale marks on the whiteboard; and analyzing to obtain the damaged space range of the soil sample according to the contour line change of the soil sample after the gas in the soil container is sprayed.
As a preferable scheme of the invention, the step S100 of adding the soil sample for the corresponding experiment into the soil container according to the soil layer of the required experiment comprises
When the eruption of the terrestrial gas is simulated, only soil is filled in the soil container;
when the seabed gas eruption is simulated, soil and water are filled in the soil container in a layered mode.
As a preferable aspect of the present invention, the pressure cell size increases with an increase in pressure of the gas filled in the pressure cell.
In a preferable mode of the invention, the diameter of the soil container is not less than 10 times the diameter of the pressure box.
In a preferred embodiment of the present invention, the pressure resistance of the metal diaphragm is not greater than the pressure resistance of the pressure cell.
Compared with the prior art, the invention has the following beneficial effects:
the gas eruption device and the method can realize the eruption experiment of the gas quantity, the gas pressure and the soil layer thickness with preset design in the sample loading process. And recording the movement process of the soil sample by monitoring of the camera. When a simulated gas burst test is carried out, the gas steel cylinder is opened, the pressure of gas filled in the pressure box is regulated through the pressure reducing valve, and after the metal diaphragm is broken and opened, technical support is provided for researching the measurement data of gas burst.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic top view of an experimental set-up and method according to one embodiment of the present invention;
FIG. 2 is a schematic side view of the experimental set-up and method according to FIG. 1;
FIG. 3 is a schematic side view of an experimental set-up and method according to another embodiment of the present invention;
FIG. 4 is a schematic view of the arrangement of the pressure cell and soil container in one embodiment of the present invention;
fig. 5 is a schematic view of the structure of the pressure cell of the present invention.
The reference numerals in the drawings denote the following, respectively:
10-soil container, 20-camera, 30-white board, 40-gas steel cylinder, 50-pressure reducing valve, 60-pressure box, 100-pressure pipe line between soil container and pressure reducing valve, 200-O type sealing ring, 300-annular hoop, 400-metal diaphragm, 500-interface at bottom of soil container, 600-pressure pipe line between pressure box and soil container, 700-pressure pipe line between pressure box and pressure reducing valve, 800-soil sample.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a 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 embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIGS. 1-5, the present invention provides an experimental apparatus for simulating gas eruption, comprising
A soil container 10 having an opening, the soil container 10 being used for containing a soil sample 800;
the pressure box 60, the pressure box 60 is arranged in the soil container 10, and the pressure box 60 is provided with an opening, the pressure box 60 is used for introducing gas to increase the internal pressure of the pressure box 60;
the metal diaphragm 400 is connected in the opening of the pressure box 60, the metal diaphragm 400 can block and limit the gas in the pressure box 60 to be discharged, and the limitation to the gas in the pressure box 60 is released when the pressure in the pressure box 60 is not less than the set pressure;
the gas steel cylinder 40 is communicated with the pressure box 60, and the gas steel cylinder 40 is used for filling gas with metered pressure into the pressure box 60;
the camera 20 is used for recording the movement process of the soil sample 800 after the pressure of the pressure box 60 is relieved;
the white board 30, the white board 30 has horizontal lines marked with different heights, and the white board 30 is used for measuring the movement positions of the soil sample 800 at different moments.
In the present embodiment, the rupture pressure of the metal diaphragm 400 is first checked. As shown in fig. 1, the metal diaphragm is cut into a circular shape and fixed to the upper surface of the pressure case 60 by tightening the annular band 300. In general, the film thickness can be estimated theoretically or empirically as desired for experimental parameters.
Before the experiment, it was confirmed that the pressure reducing valve 50 and the gas cylinder 40 were both in the closed state.
Preferably, a pressure reducing valve 50 is connected to an outlet of the gas cylinder 40, and the pressure reducing valve 50 is used to adjust and control the pressure of the gas charged into the pressure cell 60.
The pressure box is placed in the hollow soil container 10, and is connected with the pressure reducing valve 50 through the interface 500 and the connecting line 600 at the lower part, and the interface 700 and the connecting line 100 at the bottom of the soil container, and the pressure valve is connected with the gas steel cylinder 40 or the air pump.
For the sake of experimental safety, the connection line 100 should have a certain length, that is, when the experimenter operates the pressure reducing valve, the experimenter keeps a safe distance from the soil container.
The gas cylinder switch is opened and then the switch of the pressure reducing valve is gradually opened, so that the pressure of the gas passing through the pressure reducing valve gradually rises. When the pressure rises to a certain value, the metal diaphragm 400 of the pressure cell is broken and burst open, and the pressure at this time is recorded as a rupture pressure.
After the present embodiment is completed, the gas cylinder switch, or the air pump switch, is turned off.
The invention also provides an experimental method of the experimental device based on the simulated gas eruption, which comprises the following steps:
s100, adding a soil sample for the experiment into a soil container according to a soil layer of the experiment until the soil reaches a designed height, and correspondingly placing a white board and a camera on two side surfaces of the soil container;
s200, inflating the pressure box through a gas steel cylinder;
s300, when the pressure of the gas in the pressure box is not less than the set pressure, the metal diaphragm relieves the limitation on the gas in the pressure box and rushes out a soil sample through the gas;
s400, analyzing the time-displacement process of the soil sample movement according to the soil sample movement shot by the camera and the scale marks on the whiteboard; and analyzing to obtain the damaged space range of the soil sample according to the contour line change of the soil sample after the gas in the soil container is sprayed.
Preferably, the step S100 of adding the soil sample for the experiment into the soil container according to the soil layer of the experiment includes
When the eruption of the terrestrial gas is simulated, only soil is filled in the soil container;
when the seabed gas eruption is simulated, soil and water are filled in the soil container in a layered mode.
Preferably, the pressure cell size increases as the pressure of the gas filled in the pressure cell increases.
Preferably, the diameter of the soil container is not less than 10 times the diameter of the pressure box.
Preferably, the pressure resistance of the metal membrane is not greater than that of the pressure box.
In this embodiment, the pressure box 60 covered with the metal film is placed in the soil container 10, and the pressure box and the soil container are connected through the connector 500 and the connecting line 600.
The soil sample for the experiment was added to the soil container 10 to the height designed by the experimenter.
On the side of the soil container 10, a white board 30 is vertically placed, and on the other side corresponding thereto, a high-speed camera 20 is disposed so that the white board 30 and the soil container 10 are both within the shooting range of the camera.
When it is confirmed that the switch of the gas cylinder or the air pump is turned off, the connection line 100 is connected to the pressure reducing valve 50, the pressure valve is connected to the gas cylinder 40, or the air pump is connected.
The camera 20 is turned on.
The gas cylinder or air pump is turned on and the discharge pressure of the pressure reducing valve is adjusted until the metal diaphragm 400 is broken. Generally, the breakage of the metal diaphragm 400 is easily judged, and at this time, a loud sound is generated and accompanied by the upward scattering of the soil in the soil container 10.
The switch of the gas cylinder or the air pump is turned off.
According to the soil motion shot by the high-speed camera and the scale marks on the white board, the time-displacement process of the soil motion can be analyzed; according to the contour line change of the soil body after the gas in the soil container is sprayed, the damaged space range of the soil body can be analyzed.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (7)
1. The utility model provides an experimental apparatus of simulation gas eruption which characterized in that: comprises that
The soil containing container (10) is provided with an opening, and the soil containing container (10) is used for containing a soil sample (800);
the pressure box (60), the pressure box (60) is arranged in the soil container (10), an opening is arranged on the pressure box (60), and the pressure box (60) is used for introducing gas to increase the internal pressure of the pressure box (60);
the metal diaphragm (400), the metal diaphragm (400) is connected in the opening of the pressure box (60), and the metal diaphragm (400) can block and limit the gas in the pressure box (60) to be discharged and can release the limitation on the gas in the pressure box (60) when the pressure in the pressure box (60) is not less than the set pressure;
the gas steel cylinder (40), the said gas steel cylinder (40) communicates with said pressure cell (60), the said gas steel cylinder (40) is used for charging the gas of the gauge pressure to the pressure cell (60);
the camera (20) is used for recording the movement process of the soil sample (800) after the pressure of the pressure box (60) is relieved;
the device comprises a white board (30), wherein horizontal lines with different heights are marked on the white board (30), and the white board (30) is used for measuring the moving positions of the soil sample (800) at different moments.
2. An experimental apparatus for simulating a gas burst according to claim 1, wherein: and the outlet of the gas steel cylinder (40) is connected with a pressure reducing valve (50), and the pressure reducing valve (50) is used for adjusting and controlling the pressure of gas filled into the pressure box (60).
3. An experimental method based on an experimental apparatus for simulating a gas burst according to any one of claims 1 to 2, comprising the steps of:
s100, adding a soil sample for the experiment into a soil container according to a soil layer of the experiment until the soil reaches a designed height, and correspondingly placing a white board and a camera on two side surfaces of the soil container;
s200, inflating the pressure box through a gas steel cylinder;
s300, when the pressure of the gas in the pressure box is not less than the set pressure, the metal diaphragm relieves the limitation on the gas in the pressure box and rushes out a soil sample through the gas;
s400, analyzing the time-displacement process of the soil sample movement according to the soil sample movement shot by the camera and the scale marks on the whiteboard; and analyzing to obtain the damaged space range of the soil sample according to the contour line change of the soil sample after the gas in the soil container is sprayed.
4. The experimental method based on the experimental device for simulating the gas eruption as claimed in claim 3, wherein: in step S100, according to the soil layer of the required experiment, adding the soil sample for the corresponding experiment into the soil container comprises
When the eruption of the terrestrial gas is simulated, only soil is filled in the soil container;
when the seabed gas eruption is simulated, soil and water are filled in the soil container in a layered mode.
5. The experimental method based on the experimental device for simulating the gas eruption as claimed in claim 3, wherein: the pressure cell size increases as the pressure of the gas filled in the pressure cell increases.
6. The experimental method based on the experimental device for simulating the gas eruption as claimed in claim 3, wherein: the diameter of the soil container is not less than 10 times of the diameter of the pressure box.
7. The experimental method of claim 3, wherein the pressure resistance of the metal diaphragm is not greater than that of the pressure box.
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| CN202111611397.4A CN114283666B (en) | 2021-12-27 | 2021-12-27 | Experimental device and method for simulating gas eruption |
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| CN113154941A (en) * | 2021-05-17 | 2021-07-23 | 天津天堰科技股份有限公司 | Pneumatic explosion simulator |
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2021
- 2021-12-27 CN CN202111611397.4A patent/CN114283666B/en active Active
Patent Citations (8)
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| RU2251158C1 (en) * | 2003-11-18 | 2005-04-27 | Смоленская государственная медицинская академия | Method for modeling hypoxia with hypercapnia in animals |
| CN109036058A (en) * | 2018-06-04 | 2018-12-18 | 湖南工学院 | A kind of imflammable gas blast accident simulation flowchart device |
| CN109142103A (en) * | 2018-09-26 | 2019-01-04 | 中国人民解放军陆军工程大学 | A kind of big equivalent underground explosion effect analog device |
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| CN110095807A (en) * | 2019-04-08 | 2019-08-06 | 三峡大学 | A kind of simulation projectile type landslide experimental provision and method |
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