CN113567244A - Positive fault physical simulation test device and method for coal and gas outburst simulation test - Google Patents
Positive fault physical simulation test device and method for coal and gas outburst simulation test Download PDFInfo
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- CN113567244A CN113567244A CN202110835514.9A CN202110835514A CN113567244A CN 113567244 A CN113567244 A CN 113567244A CN 202110835514 A CN202110835514 A CN 202110835514A CN 113567244 A CN113567244 A CN 113567244A
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
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- 230000008569 process Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
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- G—PHYSICS
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- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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Abstract
The invention discloses a normal fault physical simulation test device and a method thereof for a coal and gas outburst simulation test, wherein the device comprises two baffles, each baffle is formed by connecting at least two telescopic baffles up and down, the two adjacent telescopic baffles on the upper side and the lower side are connected through a foldable connecting structure, the foldable connecting structure comprises a spherical flange and a ball socket groove which are respectively arranged at the upper end and the lower end of each telescopic baffle, the two telescopic baffles which are oppositely arranged are connected through at least two adjustable cross braces, each adjustable cross brace is a telescopic rod, two ends of each adjustable cross brace are respectively provided with a spherical end, the telescopic baffles are respectively provided with a ball socket corresponding to the spherical end, the ball sockets of the telescopic baffles on the left side and the right side are symmetrically arranged, and the spherical ends are inserted into the ball sockets and can rotate in the ball sockets. The probability of completing the joint manufacture of the simulated coal seam and the normal fault is realized, the influence of disturbance generated by the previous manufacture and the subsequent manufacture is avoided, and the simulated coal seam containing the normal fault manufactured by the method has high similarity with the actual occurrence.
Description
Technical Field
The invention relates to the technical field of coal and gas outburst simulation tests, in particular to a forward fault physical simulation test device and method for a coal and gas outburst simulation test.
Background
Coal and gas outburst is an extremely complex power phenomenon in the underground mining process of coal mines, and the safety production of the coal mines is seriously threatened. Although the understanding of the coal and gas outburst mechanism by the scholars at home and abroad is unified on the comprehensive hypothesis at present, and the outburst is a mechanical process for releasing energy and destroying a coal body, due to the complexity of the coal and gas outburst, quantitative research needs to be carried out on the mechanical action mechanism and the process of the coal and gas outburst for further improving the prevention level of the coal and gas outburst. The research of the coal and gas outburst is limited by the danger and the occurrence conditions of the coal and gas outburst, and a direct observation method cannot be adopted, so that the coal and gas outburst simulation test is an effective method for researching the mechanical action mechanism and the process of the coal and gas outburst.
The three-dimensional large-size coal and gas outburst mode test device is adopted, and the test process comprises the following steps: the method comprises the steps of firstly pressing a simulated coal bed in a sealed box body by matching with similar materials for a pressure tester, then filling and adsorbing test gas in the simulated coal bed in the sealed box body, applying three-dimensional pressure to the pressure tester after adsorption balance to enter a protrusion preparation (inoculation) stage, opening a protrusion opening to perform protrusion starting and stopping, performing protrusion process and data acquisition after protrusion through a high-frequency data acquisition instrument, a high-speed camera and the like, and quantitatively researching the protrusion mechanical action process.
The occurrence of the coal layer containing gas and the outburst of coal and gas are controlled by the geological structure, and the early test device is limited by the small size of the sealed box body, so that the geological structure model cannot be added into the simulation test. At present, the size of a sealing box of the existing test device is large, for example, the internal size of the sealing box is 1.5m × 0.8m × 0.8m (length × width × height) of the test device developed by Chongqing research institute of the Zhongyao chemical group; the test device developed by Huainan mining group has the characteristics that the size of a sealed box body is 3.3m multiplied by 3.25m multiplied by 4.1m (length multiplied by width multiplied by height), the space of the sealed box body with large size and the simulated coal seam pressing mould are combined, and the test device has the condition that a geological structure model is added into a simulation test. When a physical simulation test is carried out, a fault model is added under the conditions of vertical and horizontal loading and high-pressure gas filling sealing, so that the similarity of the test is improved, and the coal and gas outburst mechanism and the prevention and control technology are improved. However, the existing forward fault simulation test device is mostly composed of a base, a stand column, a box body and the like, the size of the forward fault simulation test device is huge compared with that of a sealed box body of the coal and gas outburst test device, the forward fault simulation test device cannot be applied to the sealed box body, and the manufacturing method and the manufacturing process cannot meet the requirements of layered pressing manufacturing and outburst similarity of a sealed box body simulated coal bed, so that the forward fault simulation test device for the coal and gas outburst simulation test and the implementation method thereof are needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a normal fault physical simulation test device for a coal and gas outburst simulation test, which is used for pressurizing and layering a box mould to manufacture a simulated coal bed containing a normal fault, realizing the characteristics of the normal fault including fault distance, structural stress, occurrence and the like, and being used for the coal and gas outburst simulation test influenced by the normal fault. The invention also discloses a physical simulation test method for the coal and gas outburst normal fault.
In order to achieve the first purpose, the invention adopts the following technical scheme: the utility model provides a positive fault physical simulation test device for coal and gas outburst analogue test which characterized in that: the adjustable transverse strut is a telescopic rod, two ends of the adjustable transverse strut are respectively provided with a spherical end socket, the telescopic baffles are respectively provided with ball sockets corresponding to the spherical ends, the ball sockets of the telescopic baffles on the left side and the right side are symmetrically arranged, and the spherical ends are inserted into the ball sockets and can rotate in the ball sockets.
The baffles which are symmetrically arranged at the left and the right form a stable space through the adjustable cross arm and the ball socket connection between the baffles. When the device is used for the pressurization manufacturing of the simulated coal seam, the simulated coal seam material is filled between the two sides and the box body, and the space between the baffles forms the positive fault distance and the fall.
The telescopic baffle has the characteristic of adjustable height, and can realize cooperative deformation along with layering and pressurizing of the loose simulation material without being crushed by pressure. The length of the telescopic baffle can be processed according to the size of a simulated coal seam or the size of a simulated normal fault.
The upper and lower telescopic baffles are positioned in different planes through a foldable connecting structure and used for simulating the unevenness of the fault section; and the quick connection mode is convenient for being continuously spliced along with the pressing of the simulated coal seam in the box body, and is convenient for being disassembled after the simulated coal seam is pressed.
The adjustable cross arm realizes the adjustment of the space between the symmetrical baffles. Adopt ball socket connected mode between adjustable stull and the scalable baffle, can realize that adjustable stull and scalable baffle become different angles, satisfy the different normal fault demands of producing the form of simulation.
In the scheme, the method comprises the following steps: the adjustable cross brace comprises a horizontal outer sleeve and a horizontal inner sleeve, the inner sleeve is sleeved in the outer sleeve, a row of bolt holes are correspondingly formed in the inner sleeve and the outer sleeve, the inner sleeve can move in the outer sleeve, and the inner sleeve and the outer sleeve are locked and positioned through bolts inserted into the inner sleeve and the outer sleeve. The telescopic mechanism can stretch out and draw back by pulling the inner sleeve and is locked by the bolt.
In the scheme, the method comprises the following steps: the ball socket is arranged on the baffle plate at the lower half part of the telescopic baffle plate.
In the scheme, the method comprises the following steps: two telescopic cross braces are arranged in tandem between two telescopic baffles symmetrically arranged on the left side and the right side, and the two adjustable cross braces are at the same height.
The second object of the present invention is achieved by: a physical simulation test method for a coal and gas outburst positive fault is characterized by being manufactured according to the following method: (1) two telescopic baffles are symmetrically placed in a box body of the coal and gas outburst simulation device according to parameters such as the occurrence, end distance and fall of the simulated normal fault, and the inclination angle and the relative position of the two telescopic baffles are fixed and adjusted by two adjustable cross braces; (2) filling loose simulation coal seam materials in the space between the two sides of the telescopic baffle and the box body, applying vertical load to compact the simulation coal seam materials by using a press machine, and layering the simulation coal seam materials to form a simulation coal seam; (3) quickly connecting the two telescopic baffles with the previous two telescopic baffles through a foldable connecting structure, adjusting the folding angle, fixing the two telescopic baffles by using two adjustable cross braces, and repeating the step (2); (4) repeating the step (3) and the step (2) until the design thickness of the simulated coal seam is achieved; (5) and (5) maintaining, and dismantling the testing device to finish the manufacture of the normal fault for the coal and gas outburst simulation test.
Has the advantages that: the invention has reasonable design, simple structure and easy implementation, solves the problem of layered pressurization manufacturing of the simulated coal seam in a narrow space, realizes the possibility of completing the common manufacturing of the simulated coal seam and the normal fault, avoids the influence of disturbance generated by the first and the second manufacturing, and has high similarity with the actual occurrence of the simulated coal seam containing the normal fault.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a left side view of the retractable barrier.
Fig. 3 is a schematic structural diagram of the adjustable cross brace.
Fig. 4 is a schematic view of a foldable connection structure between retractable baffles.
Fig. 5 is a schematic view of the connection structure of the adjustable cross brace and the ball socket of the retractable baffle.
FIG. 6 is a schematic diagram of a simulated coal seam containing normal fault.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
as shown in figures 1-6, the forward fault physical simulation test device for the coal and gas outburst simulation test is formed by splicing a telescopic baffle 1 and an adjustable cross brace 2.
At least two retractable baffles 1 are connected up and down to form baffles, the two baffles are arranged in opposite directions in bilateral symmetry, and a positive fault distance and a fall are formed in the space between the two baffles.
The two opposite telescopic baffles 1 are connected through at least two adjustable cross braces 2, preferably, the two telescopic cross braces 2 are arranged in tandem between the two telescopic baffles 1 symmetrically arranged on the left side and the right side, and the two adjustable cross braces 2 are at the same height.
The adjustable cross arm 2 is a telescopic rod and comprises a horizontal outer sleeve 201 and a horizontal inner sleeve 202, the inner sleeve 202 is sleeved in the outer sleeve 201, a row of bolt holes 203 are correspondingly formed in the inner sleeve 202 and the outer sleeve 201, the inner sleeve 202 can move in the outer sleeve 201, and the inner sleeve 202 and the outer sleeve 203 are locked and positioned through bolts inserted into the inner sleeve 202 and the outer sleeve 203. The length of the adjustable cross arm 2 is variable, and the adjustment of the distance between the symmetrical baffles is realized.
When in use, the preparation method comprises the following steps: (1) two telescopic baffles are symmetrically placed in a box body 5 of the coal and gas outburst simulation device according to parameters such as the occurrence, end distance and fall of a simulated normal fault, and the two telescopic baffles are fixed and adjusted by two adjustable cross braces 2 to determine the inclination angle and the relative position of the two telescopic baffles so as to adjust the distance between the two baffles; (2) filling loose simulation coal seam materials into spaces between two sides of the telescopic baffle 1 and the box body 5, applying vertical load to compact the simulation coal seam materials by using a press machine, and layering the simulation coal seam materials to form a simulation coal seam 6; (3) quickly connecting the two telescopic baffles with the previous two telescopic baffles through a foldable connecting structure, adjusting the folding angle, fixing the two telescopic baffles by using two adjustable cross braces, and repeating the step (2); (4) repeating the step (3) and the step (2) until the design thickness of the simulated coal seam is achieved; (5) and (5) maintaining, and removing the testing device to finish the manufacture of the normal fault 7 for the coal and gas outburst simulation test.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (5)
1. The utility model provides a positive fault physical simulation test device for coal and gas outburst analogue test which characterized in that: the adjustable transverse strut is a telescopic rod, two ends of the adjustable transverse strut are respectively provided with a spherical end socket, the telescopic baffles are respectively provided with ball sockets corresponding to the spherical ends, the ball sockets of the telescopic baffles on the left side and the right side are symmetrically arranged, and the spherical ends are inserted into the ball sockets and can rotate in the ball sockets.
2. The forward fault physical simulation test device for the coal and gas outburst simulation test is characterized in that: the adjustable cross brace comprises a horizontal outer sleeve and a horizontal inner sleeve, the inner sleeve is sleeved in the outer sleeve, a row of bolt holes are correspondingly formed in the inner sleeve and the outer sleeve, the inner sleeve can move in the outer sleeve, and the inner sleeve and the outer sleeve are locked and positioned through bolts inserted into the inner sleeve and the outer sleeve.
3. The forward fault physical simulation test device for the coal and gas outburst simulation test is characterized in that: the ball socket is arranged on the baffle plate at the lower half part of the telescopic baffle plate.
4. The forward fault physical simulation test device for coal and gas outburst simulation tests according to claim 3, wherein: two telescopic cross braces are arranged in tandem between two telescopic baffles symmetrically arranged on the left side and the right side, and the two adjustable cross braces are at the same height.
5. A physical simulation test method for a coal and gas outburst positive fault is characterized by being manufactured according to the following method: (1) two telescopic baffles are symmetrically placed in a box body of the coal and gas outburst simulation device according to parameters such as the occurrence, end distance and fall of the simulated normal fault, and the inclination angle and the relative position of the two telescopic baffles are fixed and adjusted by two adjustable cross braces; (2) filling loose simulation coal seam materials in the space between the two sides of the telescopic baffle and the box body, applying vertical load to compact the simulation coal seam materials by using a press machine, and layering the simulation coal seam materials to form a simulation coal seam; (3) quickly connecting the two telescopic baffles with the previous two telescopic baffles through a foldable connecting structure, adjusting the folding angle, fixing the two telescopic baffles by using two adjustable cross braces, and repeating the step (2); (4) repeating the step (3) and the step (2) until the design thickness of the simulated coal seam is achieved; (5) and (5) maintaining, and dismantling the testing device to finish the manufacture of the normal fault for the coal and gas outburst simulation test.
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