CN115165727B - Rock stratum analogue simulation experiment device and method capable of adjusting inclination angle and inclination - Google Patents
Rock stratum analogue simulation experiment device and method capable of adjusting inclination angle and inclination Download PDFInfo
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- CN115165727B CN115165727B CN202210701478.1A CN202210701478A CN115165727B CN 115165727 B CN115165727 B CN 115165727B CN 202210701478 A CN202210701478 A CN 202210701478A CN 115165727 B CN115165727 B CN 115165727B
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- 238000004088 simulation Methods 0.000 title claims abstract description 57
- 239000011435 rock Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 123
- 239000010959 steel Substances 0.000 claims abstract description 123
- 239000003245 coal Substances 0.000 claims abstract description 35
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Abstract
The invention discloses a rock stratum analogue simulation experiment device and method capable of adjusting inclination angle and inclination, and relates to the field of mine pressure and rock stratum movement control. The rock stratum analogue simulation experiment device with adjustable dip angle and inclination comprises: the lifting jack comprises a base, a frame, a baffle plate part, a column group and a jack group 5; the frame is arranged on the base and comprises an upper top plate, a lower bottom plate and four vertical steel plates 4; the baffle part comprises two first baffle groups which are oppositely arranged and two second baffle groups which are oppositely arranged; the upright post group comprises four upright posts, and the jack group comprises four jacks. By adopting the rock stratum analogue simulation experiment device and method provided by the invention, the inclination angles and the inclination angles of the coal layer and the rock stratum in the analogue simulation experiment can be conveniently adjusted, and the movement deformation and the earth surface deformation rule of the overlying rock stratum under different inclination angles and inclination states of the coal layer can be more truly simulated.
Description
Technical Field
The invention relates to the research field of mine pressure and rock stratum movement rules, in particular to a rock stratum analogue simulation experiment device and method capable of adjusting inclination angle and inclination.
Background
The reserves of the inclined coal beds are rich in Xinjiang, ningxia, gansu and other places in China, and the occurrence dip angle and the burial depth of the coal beds have important influence on the mining process and the surrounding rock supporting mode. The movement rule of the overburden caused by the inclined coal seam mining is greatly different from that of the nearly horizontal coal seam, and the main reason is that the overburden movement of the working face after the inclined coal seam mining has asymmetry and the hydraulic support is easy to fall down due to the action of gravity along the inclination component. Therefore, the method has important significance in deep research on the movement rule of the overlying strata of the inclined coal seam stope and the support load, and provides basis for the inclined coal seam mining design and support selection. The physical simulation experiment is an effective means for researching the movement rule of the overlying strata of the stope in the field of mining engineering, however, the simulation experiment table designed at the present stage is mostly suitable for near-horizontal and horizontal coal beds, has poor adaptability to the simulation experiment of the inclined coal beds, is difficult to realize the downward experiments at different inclined angles, cannot meet the research requirements, and consumes a large amount of manpower and material resources.
Disclosure of Invention
The invention aims to provide a rock stratum analogue simulation experiment device and method with adjustable dip angle and inclination, which can more truly reflect the rock movement condition of underground coal mines, especially after the exploitation of inclined coal seams, and has great significance for guiding actual production.
In order to achieve the above purpose, the invention adopts the following technical scheme: according to one aspect of the present invention, there is provided a rock formation similarity simulation apparatus with adjustable inclination angle and inclination, comprising: the lifting jack comprises a base, a frame, a baffle plate part, a column group and a jack group; wherein,
The frame is arranged on the base and comprises an upper top plate, a lower bottom plate and four vertical steel plates, wherein the four vertical steel plates are respectively a first vertical steel plate, a second vertical steel plate, a third vertical steel plate and a fourth vertical steel plate, the upper top plate and the lower bottom plate are relatively arranged in parallel, the four vertical steel plates are of narrow strip structures, the four vertical steel plates are arranged around the upper top plate and the lower bottom plate in a counter-clockwise manner in sequence, one end of each vertical steel plate is fixedly connected with the upper top plate, the other end of each vertical steel plate is fixedly connected with the lower bottom plate, and a space enclosed by the frame is used for accommodating similar simulation materials;
The upright post group comprises four upright posts, namely a first upright post, a second upright post, a third upright post and a fourth upright post, wherein the four upright posts are connected with the four vertical steel plates in a one-to-one correspondence manner, and each upright post can move up and down relative to the corresponding connected vertical steel plates;
The baffle part comprises two oppositely arranged first baffle groups and two oppositely arranged second baffle groups, wherein one first baffle group is connected with the first upright post and the second upright post, the other first baffle group is connected with the third upright post and the fourth upright post, one second baffle group is fixedly connected with the first vertical steel plate and the fourth vertical steel plate, and the other second baffle group is fixedly connected with the second vertical steel plate and the third vertical steel plate;
The jack group comprises four jacks, namely a first jack, a second jack, a third jack and a fourth jack, wherein the four jacks are connected with four upright posts in a one-to-one correspondence manner, and each upright post can move up and down along with the up-and-down lifting of the jack; the connecting positions of the first baffle groups and the upright posts are adjustable, and accordingly, the jack drives the upright posts to move up and down, so that the connecting positions of the first baffle groups and the upright posts are adjusted accordingly, and the same inclination angles of the two first baffle groups and the inclination angles between the two first baffle groups are adjusted.
According to another aspect of the present invention, there is also provided an experimental method of a rock formation similarity simulation apparatus with adjustable inclination and inclination as described above, comprising the following steps.
S1, selecting parts required in a rock stratum simulation experiment device with proper size according to the preset volume of the simulation material.
S2, assembling the space orientation of the components selected in the step S1, connecting the frame with the base, connecting one first baffle with the first upright and the second upright, connecting the other first baffle with the third upright and the fourth upright, fixedly connecting the second baffle group with the first vertical steel plate, the second vertical steel plate, the third vertical steel plate and the fourth vertical steel plate, correspondingly performing sliding connection on the four uprights respectively with the four vertical steel plates, and correspondingly connecting the four jacks respectively with the four uprights.
S3, checking connection and working conditions of all parts in the rock stratum analogue simulation experiment device, and after the rock stratum analogue simulation experiment device is ensured to work normally, obtaining positions where the two first baffles are supposed to be located according to actual inclination angles and trends of the simulated coal layer, lifting the jack, and enabling the two first baffles to reach the positions under the driving of the upright post.
S4, paving the prepared similar simulation materials in a model forming area in the frame uniformly according to a certain thickness and layering, adding first baffles in the two first baffle groups layer by layer, after the similar simulation materials are paved, forming and solidifying the model, and removing baffles around the frame to enable the model to be air-dried in a natural state; then, a similar simulation experiment can be carried out to study the collapse motion rule of the overburden after the inclined coal seam is mined, and after the experiment is completed, all parts are disassembled in the reverse order and are properly stored.
Compared with the prior art, the rock stratum analogue simulation experiment device and method with adjustable dip angle and inclination have the following beneficial effects: according to the occurrence dip angle and tendency of the simulated coal bed, the upright post of the rock stratum similar simulation experiment device is lifted, the dip angle and tendency are adjusted, so that similar simulation materials show the actual state of the simulated rock stratum, simulation of mining of coal beds with different dip angles and different buries is realized, the experiment device is reasonable in structural design, strong in repeatability and wide in application range, and mining sites of fully-mechanized coal mining including mining of coal beds with different dip angles and migration rules of the rock stratum can be restored more truly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a simulated experiment device for rock formation with adjustable inclination angle and inclination in accordance with an embodiment of the present invention.
Fig. 2 is a schematic diagram of a molded state according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a vertical column and a vertical steel plate chute according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a baffle according to an embodiment of the present invention.
Wherein, each reference sign in the figure: 1-a base; 2-a frame; 3-a baffle plate part; 4-a fixing part; 7-a similar simulated material; 21-an upper top plate; 22-a lower plate; 23-a first vertical steel plate; 24-a second vertical steel plate; 25-a third vertical steel plate; 26-fourth vertical steel plate; 231-a first measurement section; 241—a second measurement section; 251—a third measurement section; 261-fourth measurement section; 31-a first baffle group; 32-a second baffle group; 51—a first upright; 52-a second upright; 53-a third upright; 54-fourth upright post; 61-a first jack; 62-a second jack; 63-a third jack; 64-fourth jack; 8-a chute.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are directions or positions based on the drawings, and are merely for convenience of description and are not to be construed as limiting the present technical solution. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
The embodiment provides a rock stratum analogue simulation experiment device with adjustable dip angle and inclination, as shown in fig. 1 and 2, the rock stratum analogue simulation experiment device with adjustable dip angle and inclination of the embodiment comprises: base 1, frame 2, baffle portion 3, stand group, jack group.
As a specific implementation mode, the base 1 is formed by welding 4 strip-shaped steel plates end to form a short square cylindrical structure, and trapezoidal steel plates are welded on the side wall of the base 1 for supporting and reinforcing.
The frame 2 encloses the cuboid shape to the frame 2 sets up on base 1, and the frame 2 includes roof 21, lower plate 22, first vertical steel sheet 23, second vertical steel sheet 24, third vertical steel sheet 25 and fourth vertical steel sheet 26, roof 21 and lower plate 22 are rectangle or square flat board structure, and both relative parallel arrangement, first vertical steel sheet 23, second vertical steel sheet 24, third vertical steel sheet 25 and fourth vertical steel sheet 26 are narrow rectangular form structure, four vertical steel sheets anticlockwise set gradually around roof 21 and lower plate 22, as a concrete implementation, every vertical steel sheet sets up four angles at roof 21 and lower plate 22, one end and roof 21 fixed connection of every vertical steel sheet, the other end and lower plate 22 fixed connection. Thus, as shown in fig. 1, the frame 2 is a square frame, and the space enclosed by the frame 2 is used to accommodate the similar simulation material 7. The bottom end of the base 1 is in contact with the ground surface with the lower bottom edges of a plurality of trapezoidal steel plates around the side walls, and the top end of the base 1 is welded with the lower bottom plate 22 of the frame 2, so that the base 1 and the frame 2 are used together to support the similar simulation material.
The column group includes a first column 51, a second column 52, a third column 53 and a fourth column 54, and the four columns are correspondingly connected with four vertical steel plates, that is, as shown in fig. 1, each vertical steel plate is fixedly connected with a column, the first vertical steel plate 23 is connected with the first column 51, the second vertical steel plate 24 is connected with the second column 52, the third vertical steel plate 25 is connected with the third column 53, and the fourth vertical steel plate 26 is connected with the fourth column 54.
As shown in fig. 3, the first vertical steel plate 23, the second vertical steel plate 24, the third vertical steel plate 25 and the fourth vertical steel plate 26 are respectively provided with a chute 8, the first upright 51, the second upright 52, the third upright 53 and the fourth upright 54 are respectively provided with a sliding part, the sliding parts are matched with the chute 8, the sliding parts are preferably pulleys, and the pulleys can slide in the chute 8.
The baffle part 3 comprises two first baffle groups 31 and two second baffle groups 32 which are oppositely arranged, four baffle groups are arranged around the frame 2, the first baffle groups 31 and the second baffle groups 32 are fixedly connected with the frame 2 through fixing parts 4, as shown in fig. 1 and 4, one of the first baffle groups 31 is connected with a first upright post 51 and a second upright post 52, the other first baffle group 31 is connected with a third upright post 53 and a fourth upright post 54, one of the second baffle groups 32 is fixedly connected with a first vertical steel plate 23 and a fourth vertical steel plate 26, the other second baffle groups 32 is fixedly connected with a second vertical steel plate 24 and a third vertical steel plate 25, and as a specific embodiment, the fixing parts 4 can be bolts, and the height of each baffle is obviously lower than that of the upright posts by taking the view angle shown in fig. 1 as an example.
The jack group comprises a first jack 61, a second jack 62, a third jack 63 and a fourth jack 64, and the first jack 61, the second jack 62, the third jack 63 and the fourth jack 64 are respectively connected with the first upright post 51, the second upright post 52, the third upright post 53 and the fourth upright post 54. The jack can carry out lifting movement for adjust the lift of stand. The first upright 51, the second upright 52, the third upright 53, and the fourth upright 54 can be lifted and lowered along with the lifting and lowering of the first jack 61, the second jack 62, the third jack 63, and the fourth jack 64, respectively.
As shown in fig. 1, the first baffle group 31 includes a plurality of first baffles, the first baffle group 31 is formed by splicing adjacent first baffles, two ends of each first baffle are provided with baffle through holes, the first upright 51, the second upright 52 or the third upright 53 and the fourth upright 54 are respectively provided with upright through holes, a bolt connects the first baffle group 31 with the first upright 51, the second upright 52 or the third upright 53 and the fourth upright 54 through the baffle through holes and the upright through holes, the baffle through holes at least one end of each first baffle are in a strip shape, each upright through hole is also used for adjusting the fixed position of the bolt, the fixed position of the adjusting bolt is used for controlling the telescopic length of the first baffle group 31, the telescopic length refers to the length between the first baffle group 31 and the second upright 52 or between the third upright 53 and the fourth upright 54, that is, when the first upright 51 and/or the second upright 52 are lifted, the first inclination angle of one first baffle group 31 can be controlled to adjust the inclination angle, and the third upright 53 and/or the fourth inclination angle of the fourth upright 54 can be controlled to be adjusted, and the first inclination angle of the first upright 53 and/or the lifting range of the fourth upright 52 can be adjusted to be consistent. On the other hand, the inclination angle is adjusted by controlling the lifting of the first upright 51 and the second upright 52 and/or controlling the lifting of the third upright 53 and the fourth upright 54, and it should be noted that when the inclination angle is adjusted, the lifting amplitude and the lifting direction of the first upright 51 and the second upright 52 are ensured to be consistent, and the lifting amplitude and the lifting direction of the third upright 53 and the fourth upright 54 are ensured to be consistent. It can be seen that the inclination angle refers to the degree of inclination of the first barrier 31, and the inclination angle refers to the degree of inclination between the two first barrier 31 groups.
The first, second, third and fourth vertical steel plates 23, 24, 25 and 26 are provided with measuring portions for indicating positions reached by marks on the columns, respectively, to determine whether the first barrier group 31 reaches a desired inclination angle and tendency. As shown in fig. 1 and 2, the first vertical steel plate 23 is provided with a first measuring portion 231, the second vertical steel plate 24 is provided with a second measuring portion 241, the third vertical steel plate 25 is provided with a third measuring portion 251, the fourth vertical steel plate 26 is provided with a fourth measuring portion 261, and the first measuring portion 231, the second measuring portion 241, the third measuring portion 251 and the fourth measuring portion 261 may be scales or scale marks directly engraved on the vertical steel plates. The scale or the scale marks are used for conveniently observing and reading the real-time telescopic length of each upright post.
The rock stratum analogue simulation experiment device with the adjustable dip angle and the inclination can lift the upright post of the rock stratum analogue simulation experiment device according to the occurrence dip angle and the inclination of the simulated coal bed, adjust the dip angle and the inclination, enable analogue simulation materials to present the actual state of the simulated rock stratum, realize the simulation of mining of coal beds with different dip angles and different burial depths, and have reasonable structural design, strong repeatability and wide application range, and can more truly restore the mining rules of the coal beds with different dip angle tendencies and the rock stratum in the mining site of fully mechanized coal mining.
In the embodiment of the invention, a rock stratum analogue simulation experiment method with adjustable dip angle and inclination is also provided, which comprises the following steps:
s1, selecting the components required in the rock stratum simulation experiment device with proper sizes according to the preset volume of the simulation material. For the predetermined volume, it is obtained from the actual size of the coal seam being simulated and the simulated scale.
S2, assembling the space orientation of the components selected in the step S1, connecting the frame 2 with the base 1, connecting one first baffle with the first upright 51 and the second upright 52 through bolts, connecting the other first baffle with the third upright 53 and the fourth upright 54 through bolts, fixedly connecting the second baffle group 32 with the first vertical steel plate 23, the second vertical steel plate 24, the third vertical steel plate 25 and the fourth vertical steel plate 26 through bolts, respectively sliding and connecting the first upright 51, the second upright 52, the third upright 53 and the fourth upright 54 with the first vertical steel plate 23, the second vertical steel plate 24, the third vertical steel plate 25 and the fourth vertical steel plate 26, and respectively connecting the first jack 61, the second jack 62, the third jack 63 and the fourth jack 64 with the first upright 51, the second upright 52, the third upright 53 and the fourth upright 54.
S3, checking connection and working conditions of all parts in the rock stratum similar simulation experiment device, after ensuring normal operation of the rock stratum similar simulation experiment device, obtaining positions where two first baffles are located according to actual inclination angles and trends of a simulated coal bed, loosening bolts, enabling the first baffles to move along with the bolts, lifting a jack, enabling the two first baffles to reach the positions under the driving of an upright post, and screwing the bolts. In one embodiment, the elevation of the first upright 51 controls the telescoping of one of the first baffles to adjust the tilt angle, and the elevation of the fourth upright 54 controls the telescoping of the other first baffle to adjust the tilt angle. On the other hand, the inclination angle is adjusted by controlling the elevation of the third upright 53 and the fourth upright 54. Meanwhile, whether the two first baffle plates reach the positions is indicated by utilizing scale marks on the vertical steel plates, the first jack 61 and the fourth jack 64 are lifted uniformly, scale readings of the mark marks on the first baffle plates and the vertical steel plates are observed, lifting is stopped when the scale values of the vertical steel plates required by dip angle calculation are reached, the third jack 63 and the fourth jack 64 are lifted uniformly, and lifting is stopped when the scale values of the vertical steel plates required by trend calculation are reached.
In a particular embodiment, the scale readings on each vertical steel plate are in units of length, such as centimeters cm, and the inclination and trend are calculated during the experiment by observing the scale readings.
Inclination angle: Or (b) 。
Inclination angle: Or (b) 。
Wherein: a is the reading of the first baffle group 31 on the first vertical steel plate 23; b is the reading of the first baffle group 31 at the second vertical steel plate 24; c is the reading of the first baffle group 31 at the fourth vertical steel plate 26; d is the reading of the first baffle group 31 at the third vertical steel plate 25; e is the distance between the first vertical steel plate 23 and the second vertical steel plate 23, and the distance between the third vertical steel plate 25 and the fourth vertical steel plate 26; f is the distance between the first vertical steel plate 23 and the fourth vertical steel plate 26, and the distance between the second vertical steel plate 24 and the fourth vertical steel plate 25.
S4, paving the prepared similar simulation materials in a model forming area in the frame 2 uniformly according to a certain thickness and layering, adding a first baffle plate at the front and the rear of the model forming area layer by layer, after the similar simulation materials are paved, after the model is formed and solidified, removing the baffles around the frame after about five days, and air-drying the model in a natural state; then, a similar simulation experiment can be carried out to study the collapse motion rule of the overburden after the inclined coal seam is mined, and after the experiment is completed, all parts are disassembled in the reverse order and are properly stored.
S5, repeating the steps S1-S4 when the next experiment is carried out.
In summary, the rock stratum analogue simulation experiment device and method with adjustable dip angle and dip angle can realize simulation of mining of coal beds with different dip angle dip angles and different buried depths according to the occurrence dip angle and the buried depths of the coal beds, and can realize simulation of mining and angles of any dip angle dip coal beds with dip angles below 45 degrees of fully mechanized caving roof coal. The experimental device has reasonable structural design, strong repeatability and wide application range, and can more truly restore the exploitation rules of coal beds with different inclination angles and rock strata in the exploitation site of fully-mechanized coal mining.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. Rock stratum analogue simulation experiment device with adjustable inclination angle and tendency, which is characterized by comprising: the lifting jack comprises a base, a frame, a baffle plate part, a column group and a jack group; wherein,
The frame is arranged on the base and comprises an upper top plate, a lower bottom plate and four vertical steel plates, wherein the four vertical steel plates are respectively a first vertical steel plate, a second vertical steel plate, a third vertical steel plate and a fourth vertical steel plate, the upper top plate and the lower bottom plate are relatively arranged in parallel, the four vertical steel plates are of narrow strip structures, the four vertical steel plates are anticlockwise arranged around the upper top plate and the lower bottom plate in sequence, one end of each vertical steel plate is fixedly connected with the upper top plate, the other end of each vertical steel plate is fixedly connected with the lower bottom plate, and a space enclosed by the frame is used for accommodating similar simulation materials;
The upright post group comprises four upright posts, namely a first upright post, a second upright post, a third upright post and a fourth upright post, wherein the four upright posts are connected with the four vertical steel plates in a one-to-one correspondence manner, and each upright post can move up and down relative to the corresponding connected vertical steel plates;
the baffle part comprises two oppositely arranged first baffle groups and two oppositely arranged second baffle groups, wherein one first baffle group is connected with the first upright post and the second upright post, the other first baffle group is connected with the third upright post and the fourth upright post, one second baffle group is fixedly connected with the first vertical steel plate and the fourth vertical steel plate, and the other second baffle group is fixedly connected with the second vertical steel plate and the third vertical steel plate;
the jack group comprises four jacks, namely a first jack, a second jack, a third jack and a fourth jack, wherein the four jacks are connected with the four upright posts in a one-to-one correspondence manner, and each upright post can move up and down along with the up-and-down lifting of the jack; the connecting positions of the first baffle groups and the upright posts are adjustable, and accordingly, the jack drives the upright posts to move up and down, so that the connecting positions of the first baffle groups and the upright posts are adjusted accordingly, and the same inclination angles of the two first baffle groups and the inclination angles between the two first baffle groups are adjusted.
2. The rock stratum analogue simulation experiment device according to claim 1, wherein the base is formed by welding 4 strip-shaped steel plates end to form a square cylindrical structure, trapezoidal steel plates are welded on the side wall of the base for supporting and reinforcing, and the top end of the base is welded with the lower bottom plate of the frame.
3. The rock stratum analogue simulation experiment device according to claim 1, wherein each vertical steel plate is provided with a chute, each upright post is provided with a sliding part, the sliding parts are matched with the chute, and the sliding parts can slide up and down in the chute.
4. The apparatus of claim 1, wherein,
The first baffle group comprises a plurality of first baffles, and the first baffle group is formed by splicing adjacent first baffles;
The two ends of each first baffle are provided with baffle through holes, each upright post is provided with an upright post through hole, and bolts are used for connecting the first baffles with the upright posts through the baffle through holes and the upright post through holes;
The baffle through holes at least one end of each first baffle are long-strip-shaped, and when the upright columns move up and down, the first baffle groups move up and down along with the upright columns, and the inclination angle are adjusted by adjusting the fixed positions of the bolts in the baffle through holes.
5. The rock stratum similar simulation experiment device according to claim 4, wherein the upright post through hole is long-strip-shaped, and the fixing position of the bolt in the upright post through hole is convenient and flexible to adjust.
6. The rock formation simulation experiment device according to claim 4, wherein the four vertical steel plates are each provided with a measuring part for indicating a position reached by a mark on the column to determine whether the first barrier group reaches a desired inclination angle and tendency.
7. The device of claim 6, wherein the measuring part is a scale or a scale mark.
8. A method of testing a simulated test device for rock formation with adjustable inclination and dip angle as claimed in any one of claims 1-7, comprising the steps of:
S1, selecting parts required in the rock stratum simulation experiment device with proper size according to the preset volume of the simulation material;
S2, assembling the space orientation of the components selected in the step S1, connecting the frame with a base, connecting one first baffle with the first upright post and the second upright post, connecting the other first baffle with the third upright post and the fourth upright post, fixedly connecting the second baffle group with the first vertical steel plate, the second vertical steel plate, the third vertical steel plate and the fourth vertical steel plate, correspondingly and slidingly connecting the four upright posts with the four vertical steel plates respectively, and correspondingly connecting the four jacks with the four upright posts respectively;
s3, checking connection and working conditions of all parts in the rock stratum similar simulation experiment device, and obtaining positions where the two first baffles are supposed to be located according to actual inclination angles and trends of the simulated coal beds after ensuring normal operation of the rock stratum similar simulation experiment device, lifting a jack, and enabling the two first baffles to reach the positions under the driving of the upright posts;
S4, paving the prepared similar simulation materials in a model forming area in the frame uniformly according to a certain thickness and layering, adding first baffles in two first baffle groups layer by layer, after the similar simulation materials are paved, forming and solidifying the model, and removing baffles around the frame to enable the model to be air-dried in a natural state; then, a similar simulation experiment can be carried out to study the collapse motion rule of the overburden after the inclined coal seam is mined, and after the experiment is completed, all parts are disassembled in the reverse order and are properly stored.
9. The method of claim 8, wherein the formula for calculating the tilt angle and the inclination is:
inclination angle: or/>
Inclination angle: or/>
Wherein: a is the reading of the first baffle group on the first vertical steel plate; b is the reading of the first baffle group on the second vertical steel plate; c is the reading of the first baffle group on the fourth vertical steel plate; d is the reading of the first baffle group on the third vertical steel plate; e is the distance between the first vertical steel plate and the second vertical steel plate and the distance between the third vertical steel plate and the fourth vertical steel plate; f is the distance between the first vertical steel plate and the fourth vertical steel plate, and the distance between the second vertical steel plate and the fourth vertical steel plate.
10. An experimental method according to claim 9, wherein the actual dip angle and dip angle of the coal seam being simulated is 45 ° or less.
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| CN109164245A (en) * | 2018-08-30 | 2019-01-08 | 安徽理工大学 | A kind of mining formation dip is adjustable and multidirectional load analog simulation experiment shelf |
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