CN113917112B - Movable filling mechanism based on similarity simulation test platform and use method - Google Patents
Movable filling mechanism based on similarity simulation test platform and use method Download PDFInfo
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- CN113917112B CN113917112B CN202111194270.7A CN202111194270A CN113917112B CN 113917112 B CN113917112 B CN 113917112B CN 202111194270 A CN202111194270 A CN 202111194270A CN 113917112 B CN113917112 B CN 113917112B
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Abstract
The invention discloses a movable filling mechanism based on a similar simulation test platform, which comprises a main frame and a similar simulation test platform formed by a similar simulation rock and soil layer, wherein the similar simulation test platform is provided with the movable filling mechanism formed by a movable frame and a filler, the filler comprises a riding clamp, a front compression bolt and a front grout stop plate provided with a filling hole, the filling hole is connected with a filling pipe and a storage bottle, and the movable filling mechanism further comprises the riding clamp, a rear compression bolt and a rear grout stop plate. According to the invention, by arranging the movable frame and the filler, filling of each goaf along the coal seam is realized, and filling of strip goafs and/or long-wall working faces of different coal seams is also realized, so that the operation is convenient, a plurality of filling mechanisms are used simultaneously, and the requirement of filling a plurality of goafs simultaneously is met.
Description
Technical Field
The invention belongs to the technical field of mining engineering similarity simulation, and particularly relates to a movable filling mechanism and method based on a similarity simulation test platform.
Background
Because the goaf left coal pillar is influenced by mine pressure and wind effect, the goaf left coal pillar has irregularity and instability, and the stability of the goaf left coal pillar group, the stability of the filling body-coal pillar under filling mining conditions and the stability of the bearing structure of the filling body-coal pillar-direct roof in the extraction process of the left coal pillar cannot be accurately researched.
The three-lower coal pressing is widely distributed in areas with large industrial coal consumption and shortage of coal-mining carbon resources, so that reasonable exploitation of the three-lower coal pressing resources becomes a key of sustainable development of coal enterprises, and at present, short-wall caving area subsequent filling and long-wall working face frame subsequent filling become the most effective technical means for solving the three-lower coal pressing; the similarity simulation is a model test technology based on a similarity theory, is widely applied to the field of underground engineering and geotechnical engineering research at present, is used for constructing a coal seam and stratum similarity model according to actual engineering problems by adopting artificial materials in a proper proportion, converts a filling process and a coal-missing recovery process into a visual model test research, is beneficial to simplifying the research process, reducing the research difficulty and improving the research precision, and has become one of important scientific research ways for solving the mining engineering problems.
In the simulation test of the physical similar materials, the requirements of the similar materials of the filling body are as follows: (1) the filling material has certain fluidity, can meet the requirement that the similar filling material can flow in a filling mechanism and a goaf, (2) the water content of the similar simulation filling material is as small as possible, so that the water in the similar filling material is prevented from wetting a rock-soil layer around a filling area of the goaf so as not to influence the strength of a filling body and surrounding rock thereof, and (3) the requirement of mechanical property under the condition of similar strength ratio is met; however, after the coal seam exploitation, the traditional similar simulated filling test generally puts wood blocks, plastic foam, prefabricated filling test blocks, pressure sensors and the like into the goaf to simulate the supporting effect of the filling body on the overlying strata, and the traditional similar simulated filling exploitation test has the following problems and disadvantages: 1. from the point of view of the mechanical properties of the filling material: the strength similarity ratio of the material to the similar material of the filling body is greatly different, the mechanical property and the deformation characteristic of the material are obviously different from those of the similar filling material, and the deformation and the damage of the filling body under the action of the overburden pressure cannot be simulated, so that the accuracy of the overburden migration rule is affected; 2. from the filling time and goaf space angles: in actual engineering, a certain construction intermittent time exists between coal seam exploitation and goaf filling work, the goaf space volume becomes smaller after the coal pillar and the top plate are deformed in the intermittent time, and the early strength of a filling body cannot achieve the functions of restraining the coal pillar and controlling the top plate of the goaf; in the existing similar material simulation test, materials such as wood blocks are put into a goaf immediately after coal seam mining, and the initial deformation and damage of the goaf are limited by the materials with higher strength such as the wood blocks, so that the similar material simulation test has larger difference from an actual engineering in time-similarity ratio, the accuracy of the similar material simulation test is further affected, and the coupling action mechanism of a filling body and a overlying rock cannot be truly and accurately simulated.
Therefore, the method of directly placing the materials such as wood blocks into the goaf simulated filling body during the simulation test of the similar materials is not sufficient, and in view of the above-mentioned problems, there is a need to provide a movable filling mechanism and a filling method based on a simulation test platform.
Disclosure of Invention
The invention aims to solve the technical problem of providing a movable filling mechanism based on a similar simulation test platform aiming at the defects of the prior art. The mechanism realizes the filling of each goaf along the trend of the coal seam by arranging the movable frame and the filler, also realizes the filling of the strip goafs and/or the long-wall working surface circulation operation goafs of different coal seams, covers the similar simulated rock and soil layers at all positions on the similar simulation test platform, meets the requirement of filling the goafs at any positions, is convenient and compact to operate, can realize the simultaneous use of a plurality of filling mechanisms, and meets the requirement of the simultaneous filling of a plurality of goafs.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a portable filling mechanism based on simulation test platform, its characterized in that, simulation test platform includes the main frame, the main frame includes two montants and erects entablature and the underbeam on two montants, it has the simulation rock soil layer to fill in the main frame, install portable filling mechanism on the simulation test platform, filling mechanism includes the movable frame and installs the filler on the movable frame, the movable frame includes two front side standpipe that are located the main frame front side and two rear side standpipe that are located the main frame rear side, two front side standpipe tip and two the tip of rear side standpipe passes through locking device interconnect, the filler includes two on the front side standpipe two on the saddle card and two on the rear side standpipe that install, the mid-mounting of saddle card has the front hold-down bolt that runs through the saddle card on the front side standpipe, front hold-down bolt installs the front and ends thick liquid board towards main frame one end, set up the filling hole on the front and fill the thick liquid board, the filling hole has in proper order to connect with two on the rear side standpipe the back hold-down bolt that installs on the saddle pipe, the ball valve is installed towards the rear side on the main frame.
The movable filling mechanism and the method based on the similar simulation test platform are characterized in that the bottoms of the two vertical rods are respectively provided with a support used for supporting the main frame.
The movable filling mechanism and the method based on the similar simulation test platform are characterized in that the locking device comprises two threaded rods which are respectively connected with two groups of front side vertical pipes and rear side vertical pipes, two ends of each threaded rod are respectively and vertically connected with a steel plate, and locking nuts are further arranged at two ends of each threaded rod.
The movable filling mechanism and the method based on the similar simulation test platform are characterized in that the number of the locking devices is two, one locking device is located on the upper surface of the upper cross beam, and the other locking device is located on the lower portion of the upper cross beam.
The movable filling mechanism and the method based on the similar simulation test platform are characterized in that the saddle clamp is fixed with the front side vertical pipe or the rear side vertical pipe through the fastening bolts and the fastening nuts at the two ends.
The movable filling mechanism and the method based on the similar simulation test platform are characterized in that EVA sponge is adhered to one side, close to the main frame, of each of the front slurry stopping plate and the rear slurry stopping plate.
The movable filling mechanism and the method based on the similar simulation test platform are characterized in that the storage bottle is provided with capacity scales.
In addition, the invention also provides a using method of the movable filling mechanism based on the similarity simulation test platform, which is characterized by comprising the following steps:
step one, paving a similar simulation rock-soil layer: determining a material required by the similar simulation rock-soil layer according to the attribute of the rock-soil layer to be simulated, paving a material corresponding to the similar simulation rock-soil layer in a layered paving compaction mode from bottom to top on a similar simulation test platform, and mining a coal seam by simulating strip mining after the similar simulation rock-soil layer is naturally air-dried to obtain the similar simulation test platform with a goaf;
step two, installing a movable filling mechanism:
installing a movable filling mechanism on the similar simulation test platform with the goaf obtained in the step one to obtain a similar simulation test platform with the movable filling mechanism;
filling the goaf:
filling the goaf in the similar simulation test platform with the movable filling mechanism obtained in the second step by adopting the filling mechanism to obtain a filled similar simulation test platform; the filling process comprises the following steps: and moving the filling mechanism to the goaf, enabling the front slurry stopping plate and the rear slurry stopping plate to be respectively positioned at two sides of the goaf, enabling the front slurry stopping plate and the rear slurry stopping plate to be tightly attached to a similar simulation rock-soil layer, filling material slurry in a storage bottle into the goaf, closing a ball valve after filling, moving the movable filling mechanism to the next goaf to continue filling after the filling material slurry is solidified, and repeating the filling process to obtain a similar simulation test platform after filling.
The method is characterized in that the number of the movable filling mechanisms arranged on the similar simulation test platform in the second step is 1 or more; and step two, the goaf is a strip goaf or a goaf for working surface circulation operation of a long wall. The invention can be applied to the strip goaf and the goaf which is circularly operated on a long-wall working surface with a longer length.
The method is characterized in that the filling material slurry in the third step is prepared from soil, gypsum powder and cellulose, and the mass ratio of the soil to the gypsum powder to the cellulose is as follows: 260: 60-100: 1.0 to 1.4, wherein the cellulose is hydroxypropyl methyl cellulose.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the movable frames and the filler are arranged, so that the filling of each goaf along the trend of the coal seam is realized, the filling of the strip goaf and/or the long-wall working face circulation operation goaf of different coal seams is realized by adjusting the sizes of the front and rear slurry stopping plates and the EVA sponge rubber, the covering of the similar simulated rock and soil layers at all positions on the similar simulation test platform is realized, the filling of the goaf at any position is satisfied, the filling effect of materials such as wood blocks and plastic foam is replaced by the similar materials of the filler, the test error caused by the mechanical property and the shape and size difference of the filling materials is effectively solved, and the movement deformation rule of the covering rock in the goaf legacy coal pillar recovery process can be better simulated and predicted.
2. According to the invention, the front grout stop plate is provided with the filling holes, the filling holes are sequentially connected with the filling pipe and the storage bottle, filling material slurry stored in the storage bottle is filled into the goaf through the filling pipe and the filling holes, the goaf is reinforced, the ball valve is arranged on the filling pipe, the outflow quantity of the filling material slurry is controlled, the volume of the filling material slurry in the goaf is ensured, the rear grout stop plate is closely contacted with the rear side of the goaf in a similar simulation rock-soil layer and fully covers the goaf through the rear grout stop plate, and when the filling material slurry fills the goaf, the rear side is blocked, the filling material slurry is prevented from flowing out, and the goaf can be filled with the filling material slurry.
3. According to the invention, the EVA sponge with certain elasticity and sealing property is stuck on the inner sides of the front grout stop plate and the rear grout stop plate, so that the damage of the front grout stop plate and the rear grout stop plate to the surface of a rock-soil layer is avoided, the grout leakage from the edge of a goaf in the filling process is prevented, the front grout stop plate and the rear grout stop plate are tightly pressed by the front compression bolt and the rear compression bolt which pass through the riding buckles, the forces of the front grout stop plate and the rear grout stop plate on the surface of the rock-soil layer are a pair of interaction forces, and the stability of the rock-soil layer on a similar material simulation test platform is ensured.
4. According to the invention, the capacity scale is arranged on the body of the filling material slurry storage bottle, so that the filling material slurry with corresponding volume can be prepared according to the volume of the goaf, and the waste of the filling material is avoided.
5. The invention meets the strength requirement of the similar filling body by adjusting the dosage of the gypsum powder in the similar filling material; the cellulose filled with similar materials has a lubricating effect, so that good fluidity of the slurry is ensured, the slurry can be filled into a goaf through a filling mechanism, the cellulose has a certain water retention property, and the slurry can be effectively prevented from bleeding to wet surrounding rock and soil layers.
6. According to the invention, the goaf in the similar simulation rock-soil layer is filled with the similar filling material, so that the filling body and the rock-soil layer have the same strength and similarity ratio, the defect that materials such as wood blocks and plastic foam cannot deform synchronously with surrounding rock-soil layers in the test process is overcome, when the load of the upper rock-soil layer acts on a coal pillar and the filling body, the stress deformation characteristic of a 'coal pillar-filling body-overlying rock' bearing structure can be simulated, the test error caused by the mechanical property and shape and size difference of the filling material is effectively solved, the movement deformation rule of overlying rock in the goaf legacy coal pillar extraction process can be better simulated and predicted, the overlying rock migration and crack evolution rule of the goaf under the conditions of different filling materials, different filling body sizes and different extraction steps can be studied, the high anastomosis between the similar material simulation test and the actual working conditions on site can be realized, the operation is convenient, the test precision is high, and the operability is strong.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of the connection relationship between a simulation test platform and a filling mechanism according to the present invention.
FIG. 2 is a schematic diagram of the connection between the moving frame and the filler according to the present invention.
FIG. 3 is a schematic view of a filling device according to the present invention
Reference numerals illustrate:
1-a main frame; 1-1 to a vertical rod; 1-2 parts of an upper cross beam;
1-3 parts of a lower cross beam; 1-4-supporting seats; 2-simulating a rock and soil layer similarly;
2-1-goaf; 3-a moving frame; 3-1, a front side vertical pipe;
3-2-a rear side standpipe; 3-locking means; 3-3-1-a threaded rod;
3-3-2-steel plate; 3-3-3-locking bolt; 4-a filler;
4-1-riding a horse; 4-1-fastening bolts; 4-1-2-fastening nuts;
4-2-front compression bolts; 4-3-front slurry stopping plate; 4-punching a filling hole;
4-5-filling pipe; 4-6, a storage bottle; 4-7-ball valve;
4-8-rear compression bolts; 4-9 parts of rear slurry stopping plate.
Detailed Description
A movable filling mechanism based on a simulation test platform of the present invention is described in detail by example 1.
Example 1
As shown in fig. 1 to 3, the simulation test platform of the present embodiment comprises a main frame 1, the main frame 1 comprises two vertical rods 1-1 and an upper beam 1-2 and a lower beam 1-3 which are erected on the two vertical rods 1-1, the main frame 1 is filled with a simulation rock layer 2, a movable filling mechanism is mounted on the simulation test platform, the filling mechanism comprises a movable frame 3 and a filler 4 mounted on the movable frame 3, the movable frame 3 comprises two front side vertical pipes 3-1 positioned at the front side of the main frame 1 and two rear side vertical pipes 3-2 positioned at the rear side of the main frame 1, the ends of the two front side vertical pipes 3-1 and the ends of the two rear side vertical pipes 3-2 are mutually connected through locking devices 3-3, the filler 4 comprises two riding clamps 4-1 arranged on a front side vertical pipe 3-1 and two riding clamps 4-1 arranged on a rear side vertical pipe 3-2, a front compression bolt 4-2 penetrating through the riding clamps 4-1 is arranged in the middle of the riding clamps 4-1 on the front side vertical pipe 3-1, a front slurry stopping plate 4-3 is arranged at one end of the front compression bolt 4-2 towards the main frame 1, a flushing and filling hole 4-4 is formed in the front slurry stopping plate 4-3, a filling pipe 4-5 and a storage bottle 4-6 are sequentially connected with the flushing and filling hole 4-4, a ball valve 4-7 is arranged on the filling pipe 4-5, a rear compression bolt 4-8 penetrating through the riding clamps 4-1 is arranged in the middle of the riding clamps 4-1 on the rear side vertical pipe 3-2, the rear pressing bolt 4-8 is provided with a rear grout stop plate 4-9 towards one end of the main frame 1.
The main frame 1 is formed by splicing an upper beam 1-2 and a lower beam 1-3 which are erected on two vertical rods 1-1 to form a basic structure of a similar simulation test platform, a similar simulation rock-soil layer 2 is filled in an area surrounded by the two vertical rods 1-1, the upper beam 1-2 and the lower beam 1-3, the similar simulation rock-soil layer 2 is the similar simulation rock-soil layer 2 between the earth surface and a mining layer or the similar simulation rock-soil layer 2 between the earth surface and the top of a key layer, and a goaf 2-1 is simulated by emptying the similar simulation rock-soil layer 2 to simulate the influence of mine pressure and weathering effect on a coal pillar left by the goaf 2-1.
It should be noted that, the moving frame 3 is formed by two front side vertical pipes 3-1, two rear side vertical pipes 3-2 and locking devices 3-3 at the end, when the moving frame 3 needs to move, the locking devices 3-3 are opened to move the moving frame 3 to a designated position, after the moving frame 3 moves to the designated position, the locking devices 3-3 are closed to lock the moving frame 3 with the simulation test platform, the moving frame 3 is fixed, and the moving frame 3 moves left and right on the simulation test platform.
It should be noted that, through installing on two front side standpipe 3-1 and two rear side standpipe 3-2 respectively and riding on the horse card 4-1, realized riding on the horse card 4-1's the reciprocating, through installing preceding hold-down bolt 4-2 and back hold-down bolt 4-8 on riding on the horse card 4-1 and stopping thick liquid board 4-3 and back and stopping thick liquid board 4-9 and pressing down analog soil layer 2, prevent the leakage of filling material ground paste body when filling.
The movable filling mechanism is formed by the movable frame 3 and the filler 4 arranged on the movable frame 3, the movable frame 3 is adjusted when the movable filling mechanism is required to move left and right, the filler 4 is adjusted when the movable filling mechanism is required to fill goafs 2-1 with different layer heights, the simulated rock and soil layers 2 in all positions on the simulated test platform are fully covered, and the goafs 2-1 in any positions are filled.
The front grout stop plate 4-3 is provided with the filling holes 4-4, the filling holes 4-4 are sequentially connected with the filling pipe 4-5 and the storage bottle 4-6, filling material slurry stored in the storage bottle 4-6 into the goaf 2-1 through the filling pipe 4-5 and the filling holes 4-4, reinforcing the goaf 2-1, and controlling outflow of the filling material slurry through the ball valve 4-7 arranged on the filling pipe 4-5, so that the volume of the filling material slurry in the goaf 2-1 is ensured.
By installing the rear grout stop plate 4-9, the rear grout stop plate 4-9 is closely contacted with the rear side of the goaf 2-1 in the similar simulation rock and soil layer 2 and completely covers the goaf 2-1, and when filling material slurry fills the goaf 2-1, the rear side is blocked, so that the filling material slurry is prevented from flowing out, and the goaf 2-1 can be filled with the filling material slurry.
As shown in fig. 1, in this embodiment, the bottoms of two vertical rods 1-1 are provided with brackets 1-4 for supporting a main frame 1. The main frame 1 is supported by the mounting supports 1-4, so that the stability of the simulation test platform is ensured.
As shown in fig. 2, the locking device 3-3 in this embodiment includes two threaded rods 3-3-1 respectively connected to two sets of front side vertical pipes 3-1 and rear side vertical pipes 3-2, two ends of the threaded rods 3-3-1 are respectively and vertically connected to steel plates 3-3-2, and locking nuts are further installed at two ends of the threaded rods 3-3-1. The front side vertical tube 3-1 and the rear side vertical tube 3-2 are connected through the threaded rod 3-3-1 and are provided with the locking bolt 3-3-3, the locking bolt 3-3 is screwed when the movable frame 3 needs to be fixed, the upper cross beam 1-2 is tightened by the front side vertical tube 3-1 and the rear side vertical tube 3-2 to fix the movable frame 3, and the stability of the whole structure of the movable frame 3 is ensured by vertically connecting the threaded rod 3-3-1 with the steel plate 3-3-2.
In this embodiment, the number of the locking devices 3-3 is two, and two locking devices 3-3 are located on the upper surface of the upper beam 1-2, and the other locking device is located on the lower portion of the upper beam 1-2. By arranging two locking devices 3-3 at the upper and lower positions of the upper cross beam 1-2, the fixing effect on the movable frame 3 is improved, and the stability during filling is ensured.
As shown in fig. 2 and 3, the riding card 4-1 in this embodiment is fixed to the front side standpipe 3-1 or the rear side standpipe 3-2 by fastening bolts 4-1-1 and fastening nuts 4-1-2 at both ends. The two front side vertical pipes 3-1 and the two rear side vertical pipes 3-2 are respectively provided with the saddle clamp 4-1, the fastening bolts 4-1 and the fastening nuts 4-1-2, and when the saddle clamp 4-1 needs to be moved by installing the filler 4 on the movable frame 3, the fastening nuts 4-1-2 are loosened to move the saddle clamp 4-1 to a designated position, after the saddle clamp 4-1 moves to the designated position, the fastening nuts 4-1-2 are tightened to clamp the saddle clamp 4-1 with the front side vertical pipes 3-1 or the rear side vertical pipes 3-2, the saddle clamp 4-1 is fixed, the saddle clamp 4-1 moves up and down on the movable frame 3, the front grout stopping plate 4-3 and the rear grout stopping plate 4-9 are ensured to move randomly, so that the filling mechanism fully covers the similar simulated rock soil layer 2, and any goaf 2-1 of the similar simulation test platform is ensured to be filled.
In the embodiment, EVA sponge is stuck on one side of the front grout stop plate 4-3 and one side of the rear grout stop plate 4-9 close to the main frame 1. By sticking EVA sponge on the front grout stop plate 4-3 and the rear grout stop plate 4-9, grout leakage from the edge of the goaf 2-1 in the filling process is prevented, filling material grout is prevented from leaking from gaps between the front grout stop plate 4-3, the rear grout stop plate 4-9 and the similar simulation rock-soil layer 2 in the filling process, the filling effect is improved, the EVA sponge has certain elasticity and sealing performance, and damage to the surface of the similar simulation rock-soil layer 2 caused by the front grout stop plate 4-3 and the rear grout stop plate 4-9 is avoided.
The storage bottles 4-6 in this embodiment are provided with capacity graduations. The volume of the filling material slurry can be obtained by calculating the volume of the goaf 2-1, and the filling quantity is confirmed by graduations, so that the complete filling of the goaf 2-1 is ensured, and the filling effect is improved.
The method for using the movable filling mechanism based on the similar simulation test platform is described in detail by the embodiment 2 to the embodiment 4.
Example 2
The embodiment comprises the following steps:
step one, paving a similar simulation rock-soil layer 2: determining a material required by the similar simulation rock-soil layer 2 according to the attribute of the rock-soil layer to be simulated, paving the material corresponding to the similar simulation rock-soil layer 2 on a similar simulation test platform from bottom to top in a layered paving compaction mode, and mining a coal seam by simulating strip mining after the similar simulation rock-soil layer 2 is naturally air-dried to obtain the similar simulation test platform with the goaf 2-1;
step two, installing a movable filling mechanism:
installing a movable filling mechanism on the similar simulation test platform with the goaf 2-1 obtained in the step one to obtain a similar simulation test platform with the movable filling mechanism; the goaf 2-1 is a strip goaf and/or a goaf for working surface circulation operation of a long wall;
step three, filling the goaf 2-1:
filling the goaf 2-1 in the similar simulation test platform with the movable filling mechanism obtained in the second step by adopting the filling mechanism to obtain a filled similar simulation test platform; the filling process comprises the following steps: moving the filling mechanism to the goaf 2-1, enabling the front grout stop plate 4-3 and the rear grout stop plate 4-9 to be respectively positioned on two sides of the goaf 2-1, enabling the front grout stop plate 4-3 and the rear grout stop plate 4-9 to be clung to the similar simulation rock-soil layer 2, filling material slurry in the storage bottle 4-6 into the goaf 2-1, closing the ball valve 4-7 after filling, moving the movable filling mechanism to the next goaf 2-1 after the filling material slurry is solidified, continuously filling, and repeating the filling process to obtain a similar simulation test platform after filling; the filling material slurry is prepared from soil, gypsum powder and cellulose, wherein the mass ratio of the soil to the gypsum powder to the cellulose is as follows: 260:60:1.4, wherein the cellulose is hydroxypropyl methylcellulose.
Example 3
The embodiment comprises the following steps:
step one, paving a similar simulation rock-soil layer 2: determining a material required by the similar simulation rock-soil layer 2 according to the attribute of the rock-soil layer to be simulated, paving the material corresponding to the similar simulation rock-soil layer 2 on a similar simulation test platform from bottom to top in a layered paving compaction mode, and mining a coal seam by simulating strip mining after the similar simulation rock-soil layer 2 is naturally air-dried to obtain the similar simulation test platform with the goaf 2-1;
step two, installing a movable filling mechanism:
installing two movable filling mechanisms on the similar simulation test platform with the goaf 2-1 obtained in the step one to obtain a similar simulation test platform with the movable filling mechanisms; the goaf 2-1 is a strip goaf;
step three, filling the goaf 2-1:
filling goafs 2-1 in the similar simulation test platform with the movable filling mechanisms obtained in the second step by adopting two filling mechanisms respectively to obtain a filled similar simulation test platform; the filling process comprises the following steps: moving the filling mechanism to the goaf 2-1, enabling the front grout stop plate 4-3 and the rear grout stop plate 4-9 to be respectively positioned on two sides of the goaf 2-1, enabling the front grout stop plate 4-3 and the rear grout stop plate 4-9 to be clung to the similar simulation rock-soil layer 2, filling material slurry in the storage bottle 4-6 into the goaf 2-1, closing the ball valve 4-7 after filling, moving the movable filling mechanism to the next goaf 2-1 after the filling material slurry is solidified, continuously filling, and repeating the filling process to obtain a similar simulation test platform after filling; the filling material slurry is prepared from soil, gypsum powder and cellulose, wherein the mass ratio of the soil to the gypsum powder to the cellulose is as follows: 260:100:1.0, wherein the cellulose is hydroxypropyl methylcellulose.
Example 4
The embodiment comprises the following steps:
step one, paving a similar simulation rock-soil layer 2: determining a material required by the similar simulation rock-soil layer 2 according to the attribute of the rock-soil layer to be simulated, paving the material corresponding to the similar simulation rock-soil layer 2 on a similar simulation test platform from bottom to top in a layered paving compaction mode, and mining a coal seam by simulating strip mining after the similar simulation rock-soil layer 2 is naturally air-dried to obtain the similar simulation test platform with the goaf 2-1;
step two, installing a movable filling mechanism:
installing two movable filling mechanisms on the similar simulation test platform with the goaf 2-1 obtained in the step one to obtain a similar simulation test platform with the movable filling mechanisms; the goaf 2-1 is a long-wall working surface circulation working goaf;
step three, filling the goaf 2-1:
filling goafs 2-1 in the similar simulation test platform with the movable filling mechanisms obtained in the second step by adopting two filling mechanisms respectively to obtain a filled similar simulation test platform; the filling process comprises the following steps: will be filled with
The filling mechanism moves to the goaf 2-1, the front grout stop plate 4-3 and the rear grout stop plate 4-9 are respectively positioned at two sides of the goaf 2-1, the front grout stop plate 4-3 and the rear grout stop plate 4-9 are clung to the similar simulation rock-soil layer 2, filling material slurry in the storage bottle 4-6 into the goaf 2-1, closing the ball valve 4-7 after filling, moving the movable filling mechanism to the next goaf 2-1 after the filling material slurry is solidified for continuous filling, and repeating the filling process to obtain a similar simulation test platform after filling; the filling material slurry is prepared from soil, gypsum powder and cellulose, wherein the mass ratio of the soil to the gypsum powder to the cellulose is as follows: 260:80:1.2, wherein the cellulose is hydroxypropyl methylcellulose.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any simple modification, variation and equivalent variation of the above embodiments according to the technical substance of the invention still fall within the scope of the technical solution of the invention.
Claims (10)
1. A movable filling mechanism based on a simulation test platform, which is characterized in that the simulation test platform comprises a main frame (1), the main frame (1) comprises two vertical rods (1-1) and an upper cross beam (1-2) and a lower cross beam (1-3) which are erected on the two vertical rods (1-1), the main frame (1) is filled with a simulation rock soil layer (2), the simulation test platform is provided with the movable filling mechanism, the filling mechanism comprises a movable frame (3) and a filler (4) arranged on the movable frame (3), the movable frame (3) comprises two front side vertical pipes (3-1) positioned on the front side of the main frame (1) and two rear side vertical pipes (3-2) positioned on the rear side of the main frame (1), the end parts of the two front side vertical pipes (3-1) and the end parts of the two rear side vertical pipes (3-2) are mutually connected through locking devices (3-3), the filler (4) comprises two front side vertical pipes (3-1) and two rear side vertical pipes (4) arranged on the two rear side vertical pipes (1-4) respectively, front side riser pipe (3-1) is gone up the mid-mounting of saddle card (4-1) and is had preceding hold-down bolt (4-2) that runs through saddle card (4-1), preceding hold-down bolt (4-2) are towards main frame (1) one end install preceding end stop thick liquid board (4-3), have seted up on preceding end stop thick liquid board (4-3) towards filling hole (4-4), filling pipe (4-5) and storage bottle (4-6) have been connected gradually to filling hole (4-4), be provided with ball valve (4-7) on filling pipe (4-5), the mid-mounting of saddle card (4-1) on rear side riser pipe (3-2) has the back hold-down bolt (4-8) that runs through saddle card (4-1), back hold-down bolt (4-8) are towards main frame (1) one end install back end stop thick liquid board (4-9).
2. The movable filling mechanism and method based on the simulation test platform according to claim 1, wherein the bottoms of the two vertical rods (1-1) are respectively provided with a support (1-4) for supporting the main frame (1).
3. The movable filling mechanism and method based on the simulation test platform according to claim 1, wherein the locking device (3-3) comprises two threaded rods (3-3-1) respectively connected with two groups of front side vertical pipes (3-1) and rear side vertical pipes (3-2), two ends of each threaded rod (3-3-1) are respectively and vertically connected with steel plates (3-3-2), and locking nuts are further arranged at two ends of each threaded rod (3-3-1).
4. The movable filling mechanism and method based on the simulation test platform according to claim 1, wherein the number of the locking devices (3-3) is two, one locking device (3-3) is positioned on the upper surface of the upper cross beam (1-2), and the other locking device is positioned on the lower part of the upper cross beam (1-2).
5. The movable filling mechanism and method based on the simulation test platform according to claim 1, wherein the saddle clamp (4-1) is fixed with the front side vertical pipe (3-1) or the rear side vertical pipe (3-2) through fastening bolts (4-1-1) and fastening nuts (4-1-2) at two ends.
6. The movable filling mechanism and method based on the simulation test platform according to claim 1, wherein EVA sponge is adhered to one side of the front grout stopping plate (4-3) and one side of the rear grout stopping plate (4-9) close to the main frame (1).
7. The movable filling mechanism and method based on the simulation test platform according to claim 1, wherein the storage bottles (4-6) are provided with capacity scales.
8. A method of using a movable filling mechanism based on a simulation test platform according to any one of claims 1-7, the method comprising the steps of:
step one, paving a similar simulation rock-soil layer (2): determining a material required by the similar simulation rock-soil layer (2) according to the attribute of the rock-soil layer to be simulated, paving a material corresponding to the similar simulation rock-soil layer (2) on a similar simulation test platform from bottom to top in a layered paving compaction mode, and mining a coal seam by simulating strip mining after the similar simulation rock-soil layer (2) is naturally air-dried to obtain the similar simulation test platform with the goaf (2-1);
step two, installing a movable filling mechanism:
installing a movable filling mechanism on the similar simulation test platform with the goaf (2-1) obtained in the step one to obtain a similar simulation test platform with the movable filling mechanism;
filling the goaf (2-1):
filling the goaf (2-1) in the similar simulation test platform with the movable filling mechanism obtained in the second step by adopting the filling mechanism to obtain a filled similar simulation test platform; the filling process comprises the following steps: and (3) moving the filling mechanism to the goaf (2-1), enabling the front grout stop plate (4-3) and the rear grout stop plate (4-9) to be respectively positioned at two sides of the goaf (2-1), enabling the front grout stop plate (4-3) and the rear grout stop plate (4-9) to be tightly attached to the similar simulation rock-soil layer (2), filling material slurry in the storage bottle (4-6) into the goaf (2-1), closing the ball valve (4-7) after filling, moving the movable filling mechanism to the next goaf (2-1) after the filling material slurry is solidified, continuing filling, and repeating the filling process to obtain the filled similar simulation test platform.
9. The method of claim 8, wherein the number of movable filling mechanisms mounted on the simulation test platform in the second step is 1 or more; and step two, the goaf (2-1) is a strip goaf and/or a goaf for working surface circulation operation of a long wall.
10. The method according to claim 8, wherein in the third step, the filling material slurry is prepared from soil, gypsum powder and cellulose, and the mass ratio of the soil, the gypsum powder and the cellulose is: 260: 60-100: 1.0 to 1.4, wherein the cellulose is hydroxypropyl methyl cellulose.
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