Rapid construction device and method of coal mine underground gangue wall body and hydraulic control system

Abstract

The application discloses a kind of quick construction device and method of coal mine underground gangue wall and hydraulic control system, including support structure, the support mechanism includes chassis, the chassis is provided with engine, the two sides of the chassis are provided with two pairs of wheels, the chassis is also provided with box, the top of the box is provided with gangue material conveying mechanism, the box is provided with cementing material mixing mechanism, the rear end of the box is provided with gangue block forming mechanism;By setting up gangue material conveyor, cementing material mixing mechanism and gangue block forming mechanism, the rapid forming of square large gangue block based on larger gangue particle size (5mm-10cm) is realized, it is more convenient to build gangue wall, and a certain cementing material is added, the gangue block built has higher support strength, also provides a new idea for building high-strength support body in coal mine underground, solves the technical problem of gangue block construction difficulty in narrow space in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of mine backfilling and coal mine gangue solid waste treatment, and relates to a rapid construction device for walls, specifically a rapid construction device and method for underground coal mine gangue walls, and a hydraulic control system. Background Technology

[0002] Coal mining generates a large amount of coal gangue. Previously, most mines disposed of this gangue by dumping it on the surface. However, with increasing national emphasis on green and ecological practices, gangue disposal has become a major challenge in coal mining. Currently, the common methods for disposing of gangue are dumping it in abandoned underground roadways or processing it into a paste with smaller particle sizes (generally less than 20mm) and discharging it into the goaf. However, haphazard dumping in abandoned roadways cannot form a gangue pile with sufficient structural strength. After prolonged abandonment, these roadways inevitably face the risk of collapse, which could cause significant mine tremors, posing a significant safety hazard to coal mine production. As for using paste to fill goafs, the long setting time of the paste results in a prolonged filling process, severely impacting the continuity of mining and filling operations in fully mechanized longwall faces and leading to low single-face production capacity (less than 1.5 million tons per year). Therefore, there is an urgent need for a rapid construction method for large gangue walls (or solid strips). This method can be used to construct gangue walls with a certain supporting strength in abandoned roadways while processing coal gangue, and can also be used to construct solid strips in the goaf of the working face, thus helping to improve the efficiency of goaf filling.

[0003] However, currently there is no good technical method or device in this field that can provide this function, mainly because the space underground in coal mines is relatively narrow. Generally, underground coal mine roadways are 3-6 meters wide and 2-5 meters high. Even in the goaf behind the coal face, the available working space is no more than 5 meters wide and no more than 10 meters high. These limited space dimensions strictly limit the size of the construction device. The limited working space also brings many inconveniences to the operation of the construction blocks, as it is impossible to compress the blocks from multiple directions to achieve the desired compactness. To solve the above problems, this invention proposes a rapid construction method for gangue walls in underground coal mines, which solves the problem of constructing gangue blocks in narrow spaces. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a rapid construction device and method for gangue walls in underground coal mines, as well as a hydraulic control system, to solve the technical problems of low utilization rate of large gangue in coal mines and difficulty in constructing gangue blocks in narrow spaces.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A rapid construction device for gangue walls in underground coal mines includes a support mechanism. The support mechanism includes a chassis, an engine mounted on the chassis, two pairs of wheels on both sides of the chassis, a box mounted on the chassis, a gangue conveying mechanism on the top of the box, a binder mixing mechanism inside the box, and a gangue block forming mechanism at the rear end of the box.

[0007] The gangue conveying mechanism includes multiple sets of roller support rods fixed on the upper surface of the box body. Each set of roller support rods is equipped with a belt conveyor roller at its top, and all belt conveyor rollers are connected by a belt. A funnel is also provided above the front end of the box body, and the outlet of the funnel is located on one side of the belt.

[0008] The binder mixing mechanism includes an AB binder storage tank and a binder mixing tank, which are connected by an AB binder conveying pipe. The AB binder storage tank includes an A binder tank and a B binder tank. An A binder conveying pump is installed in the A binder tank, and a B binder conveying pump is installed in the B binder tank. The output pipes of both the A and B binder conveying pumps are connected to one end of the AB binder conveying pipe. The binder mixing tank is equipped with a mixer and a mixing binder conveying pump. The output pipe of the mixing binder conveying pump extends out of the binder mixing tank and splits into two paths.

[0009] The gangue block forming mechanism includes a forming box and two binder conveying pipes, one end of which is connected to both ends of the output pipe of the mixed binder conveying pump. The left and right sides of the forming box are open, and the top of the belt is aligned with the top of the opening on the left side of the forming box. The other end of one of the binder conveying pipes extends into the forming box and is located on the top side, and the other end of the other binder conveying pipe extends into the forming box and is located on the bottom side. It also includes a pair of first hydraulic rods and a pair of second hydraulic rods, one end of which is hinged to the box body. The other ends of the first hydraulic rods and the second hydraulic rods are respectively hinged to the top and bottom ends of the extrusion plate, which is located inside the forming box.

[0010] The binder conveying pipe is provided with multiple discharge holes evenly distributed on it.

[0011] This invention also includes the following technical features:

[0012] A first monitor is installed on the side wall of the funnel, a second monitor is installed on the roller support rod near the molding box, and a third monitor is installed inside the molding box.

[0013] The molding box includes a bottom plate, a front side plate and a rear side plate vertically disposed on the bottom plate, and a top plate disposed on top of the front side plate and the rear side plate.

[0014] A hydraulic control system controls the first and second hydraulic rods in the rapid construction device for gangue walls in underground coal mines; it includes a first and second bidirectional hydraulic locks respectively connected to a first cylinder of the first hydraulic rod and a second cylinder of the second hydraulic rod; a first three-position four-way solenoid directional valve is connected to the first bidirectional hydraulic lock, and a second three-position four-way solenoid directional valve is connected to the second bidirectional hydraulic lock; both the first and second three-position four-way solenoid directional valves are connected to one end of an overflow valve and one end of a metering pump; the other end of the overflow valve and the other end of the metering pump are connected to an oil tank; and a drive motor is connected to the metering pump.

[0015] The first bidirectional hydraulic lock includes a first left pilot check valve and a first right pilot check valve. The two ends of the first left pilot check valve are respectively connected to the lower chamber of the first cylinder and the first three-position four-way solenoid directional valve. The two ends of the first right pilot check valve are respectively connected to the upper chamber of the first cylinder and the first three-position four-way solenoid directional valve.

[0016] The second bidirectional hydraulic lock includes a second left pilot check valve and a second right pilot check valve. The two ends of the second left pilot check valve are respectively connected to the lower chamber of the second cylinder and the second three-position four-way solenoid directional valve. The two ends of the second right pilot check valve are respectively connected to the upper chamber of the second cylinder and the second three-position four-way solenoid directional valve.

[0017] It also includes the following technical features:

[0018] A cooler is installed between the overflow valve and the oil tank.

[0019] A filter is installed between the metering pump and the oil tank.

[0020] A rapid construction method for underground gangue walls in coal mines, employing the aforementioned rapid construction device for underground gangue walls and the aforementioned hydraulic control system, specifically includes the following steps:

[0021] Step 1: The crushed gangue collected by the funnel is transferred to the conveyor belt through the discharge port;

[0022] Step 2: The belt moves as the rollers on the roller support rod rotate, thus transporting the crushed gangue on the belt into the forming box. By adjusting the first and second hydraulic rods, the top of the extrusion plate is positioned below the belt, and the bottom of the extrusion plate is positioned on the lateral rear side of the forming box.

[0023] Step 3: When the crushed gangue above the extrusion plate is full, start the A binder conveying pump and B binder conveying pump in the AB binder storage tank. The A binder and B binder are conveyed to the mixer in the binder mixing tank through the AB binder conveying pipe for mixing and stirring to obtain mixed binder.

[0024] Step 4: The mixed binder is conveyed to the two binder conveying pipes through the two output pipes of the mixed binder conveying pump, and flows out from their respective discharge holes into the uncompacted crushed gangue.

[0025] Step 5: After the set amount of mixed binder material has flowed into the crushed gangue in the molding box, the top of the material extrusion plate is moved away from the belt and the bottom of the extrusion plate is moved closer to the belt by adjusting the first hydraulic rod and the second hydraulic rod to extrude and obtain the initial shaped gangue block.

[0026] Step 6: Start the engine to drive the wheels toward the forming box, and adjust the first and second hydraulic rods so that the top and bottom of the extrusion plate move away from the belt to form the formed gangue blocks.

[0027] Step 7: Repeat steps 1 to 6 to construct pre-formed gangue blocks in the goaf area and pile them up to form strip retaining walls.

[0028] In step 2, adjusting the first and second hydraulic rods so that the top of the extrusion plate is located below the belt and the bottom of the extrusion plate is located laterally behind the forming box specifically includes the following:

[0029] Adjust the first three-position four-way solenoid directional valve to the upper position, open the metering pump so that the pressure oil supplied by the metering pump enters the upper position of the first three-position four-way solenoid directional valve, passes through the first right pilot check valve of the first bidirectional hydraulic lock, and finally enters the upper chamber of the first cylinder. The return oil from the lower chamber of the first cylinder passes through the first left pilot check valve of the first bidirectional hydraulic lock and finally flows into the oil tank, causing the first hydraulic rod to retract.

[0030] Adjust the second three-position four-way solenoid directional valve to the lower position, open the metering pump so that the pressure oil supplied by the metering pump enters the lower position of the second three-position four-way solenoid directional valve, passes through the second left pilot check valve of the second bidirectional hydraulic lock, and finally enters the lower chamber of the second cylinder. The return oil from the upper chamber of the second cylinder passes through the second right pilot check valve of the second bidirectional hydraulic lock and finally flows into the oil tank, causing the second hydraulic rod to extend.

[0031] In step 5, adjusting the first and second hydraulic rods to move the top of the material extrusion plate away from the belt and the bottom of the extrusion plate towards the belt specifically includes the following:

[0032] Adjust the first three-position four-way solenoid directional valve to the lower position, open the metering pump so that the pressure oil supplied by the metering pump enters the lower position of the first three-position four-way solenoid directional valve, passes through the first left pilot check valve of the first bidirectional hydraulic lock, and finally enters the lower chamber of the first cylinder. The return oil from the upper chamber of the first cylinder passes through the first right pilot check valve of the first bidirectional hydraulic lock and finally flows into the oil tank, causing the first hydraulic rod to extend.

[0033] Adjust the second three-position four-way solenoid directional valve to the upper position, open the metering pump so that the pressure oil supplied by the metering pump enters the upper position of the second three-position four-way solenoid directional valve, passes through the second right pilot check valve of the second bidirectional hydraulic lock, and finally enters the upper chamber of the second cylinder. The return oil from the lower chamber of the second cylinder passes through the second left pilot check valve of the second bidirectional hydraulic lock and finally flows into the oil tank, causing the second hydraulic rod to retract.

[0034] In step 6, the first and second hydraulic rods are adjusted so that the top and bottom ends of the extrusion plate move away from the belt. This includes the following:

[0035] By adjusting the first three-position four-way solenoid directional valve and the second three-position four-way solenoid directional valve to their lower positions, the metering pump is turned on, causing the pressure oil supplied by the metering pump to flow through the lower positions of the first three-position four-way solenoid directional valve and the second three-position four-way solenoid directional valve, respectively, and then to the first left pilot check valve of the first bidirectional hydraulic lock and the second left pilot check valve of the second bidirectional hydraulic lock, respectively. Finally, they flow into the lower chambers of the first cylinder and the second cylinder, respectively. At the same time, when the hydraulic oil flows into the first left pilot check valve of the first bidirectional hydraulic lock and the second left pilot check valve of the second bidirectional hydraulic lock, the pilot oil inside each flows into the corresponding right pilot check valve. The return switch is turned on, causing the hydraulic oil in the upper chamber of the first cylinder and the upper chamber of the second cylinder to flow back to the oil tank through the first right pilot check valve and the second right pilot check valve, respectively, so that the first hydraulic rod and the second hydraulic rod can extend simultaneously.

[0036] Compared with the prior art, the beneficial technical effects of this invention are:

[0037] (I) The construction device of the present invention, by setting up a gangue conveyor, a binder mixing mechanism and a gangue block forming mechanism, realizes the rapid forming of large square gangue blocks with larger gangue particle size (5mm~10cm), which makes it easier to construct gangue walls. In addition, a certain amount of binder is added, and the constructed gangue blocks have high support strength. It also provides a new idea for constructing high-strength support structures in underground coal mines and solves the technical problem of difficult construction of gangue blocks in narrow spaces in the prior art.

[0038] (II) The construction method of the present invention adds a way to treat coal gangue, and the gangue block is mainly composed of granular gangue, which consumes a relatively large amount of gangue. It can effectively increase the amount of gangue processed in the mining area, solve the technical problem of low utilization rate of gangue produced by coal mines in the prior art, and also solve the problem of coal mines being unable to efficiently process the gangue produced in production, which causes ground accumulation and deterioration of the ground ecological environment.

[0039] (III) This invention realizes the automatic construction and forming of gangue walls in narrow spaces, effectively saving labor intensity and avoiding the safety hazards caused by the cumbersome operation in coal mines, and solves the technical problem of quickly constructing walls with a certain supporting strength in narrow spaces in coal mines. Attached Figure Description

[0040] Figure 1 This is a front sectional view of the rapid construction device for underground gangue walls in coal mines according to the present invention.

[0041] Figure 2 This is a schematic diagram of the hydraulic control system of the present invention;

[0042] Figure 3 This is a three-dimensional structural schematic diagram of the rapid construction device for underground gangue walls in coal mines according to the present invention;

[0043] Figure 4 This is a partial three-dimensional structural schematic diagram of the rapid construction device for underground gangue walls in coal mines according to the present invention.

[0044] Figure 5 This is a schematic diagram illustrating the underground application of the rapid construction device for coal mine gangue walls according to the present invention.

[0045] The meanings of the labels in the diagram are as follows: 1-Support mechanism, 2-Box body, 3-Gange material conveying mechanism, 4-Binder mixing mechanism, 5-Gange block forming mechanism, 6-First monitor, 7-Second monitor, 8-Third monitor, 9-First hydraulic cylinder, 10-Second hydraulic cylinder, 11-First two-way hydraulic lock, 12-Second two-way hydraulic lock, 13-First three-position four-way solenoid directional valve, 14-Second three-position four-way solenoid directional valve, 15-Relief valve, 16-Metering pump, 17-Oil tank, 18-Drive motor, 19-Cooler, 20-Filter;

[0046] 101-Chassis, 102-Engine, 103-Wheels

[0047] 301-Roller support rod, 302-Belt conveyor roller, 303-Belt, 304-Function funnel;

[0048] 401-AB binder storage box, 402-binder mixing box, 403-AB binder conveying pipe;

[0049] 40101-A binder bin, 40102-B binder bin, 40103-A binder conveying pump, 40104-B binder conveying pump;

[0050] 40201 - Mixer; 40202 - Mixed binder conveying pump;

[0051] 501-Forming box, 502-Binder conveying pipe, 503-First hydraulic rod, 504-Second hydraulic rod, 505-Extrusion plate, 506-Discharge hole;

[0052] 50101 - Base plate, 50102 - Front side plate, 50103 - Rear side plate, 50104 - Top plate.

[0053] 1101 - First left pilot check valve; 1102 - First right pilot check valve;

[0054] 1201 - Second left pilot check valve, 1202 - Second right pilot check valve.

[0055] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, all components in this invention are those known in the art.

[0057] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0058] This invention provides a rapid construction device for gangue walls in underground coal mines, such as... Figure 1 , 2 As shown in Figures 4 and 5, the support mechanism 1 includes a chassis 101, an engine 102 is mounted on the chassis 101, two pairs of wheels 103 are mounted on both sides of the chassis 101, a box 2 is mounted on the chassis 101, a gangue conveying mechanism 3 is mounted on the top of the box 2, a binder mixing mechanism 4 is mounted inside the box 2, and a gangue block forming mechanism 5 is mounted at the rear end of the box 2.

[0059] The gangue conveying mechanism 3 includes multiple sets of roller support rods 301 fixed on the upper surface of the box body 2. Each set of roller support rods 301 is equipped with a belt conveyor roller 302 at its top. All belt conveyor rollers 302 are connected by belts 303. A funnel 304 is also provided above the front end of the box body 2. The outlet of the funnel 304 is located on one side of the belt 303.

[0060] The binder mixing mechanism 4 includes an AB binder storage tank 401 and a binder mixing tank 402, which are connected by an AB binder conveying pipe 403. The AB binder storage tank 401 includes an A binder tank 40101 and a B binder tank 40102. An A binder conveying pump 40103 is installed in the A binder tank 40101, and a B binder conveying pump 40104 is installed in the B binder tank 40102. The output pipes of both the A binder conveying pump 40103 and the B binder conveying pump 40104 are connected to one end of the AB binder conveying pipe 403. The binder mixing tank 402 is equipped with a mixer 40201 and a mixing binder conveying pump 40202. The output pipe of the mixing binder conveying pump 40202 extends out of the binder mixing tank 402 and is divided into two paths.

[0061] The gangue block forming mechanism 5 includes a forming box 501 and two binder conveying pipes 502, one end of which is connected to both ends of the output pipe of the mixed binder conveying pump 40202. The left and right sides of the forming box 501 are open, and the top of the belt 303 is aligned with the top of the opening on the left side of the forming box 501. The other end of one binder conveying pipe 502 extends into the forming box 501 and is located on the top side, and the other end of the other binder conveying pipe 502 extends into the forming box 501 and is located on the bottom side. It also includes a pair of first hydraulic rods 503 and a pair of second hydraulic rods 504, one end of which is hinged to the box body 2. The other ends of the first hydraulic rods 503 and the second hydraulic rods 504 are respectively hinged to the top and bottom ends of the extrusion plate 505, which is located inside the forming box 501.

[0062] Multiple discharge holes 506 are evenly provided on the binder conveying pipe 502.

[0063] In the above technical solution, by setting up a gangue conveying mechanism 3, a binder mixing mechanism 4, and a gangue block forming mechanism 5, rapid forming of large square gangue blocks with larger gangue particle sizes (5mm~10cm) is achieved, which makes it easier to construct gangue walls. In addition, a certain amount of binder is added, and the constructed gangue blocks have high support strength. This also provides a new approach for constructing high-strength support structures in coal mines, and solves the technical problem of difficult construction of gangue blocks in narrow spaces in the existing technology. It realizes the automatic construction and forming of gangue walls in narrow spaces, effectively saving labor intensity and avoiding the safety hazards caused by the cumbersome operation in coal mines.

[0064] In addition, a power source is provided on one of the belt conveyor rollers 302 to drive the belt to rotate around all the belt conveyor rollers 302, thereby transporting gangue.

[0065] Specifically, a first monitor 6 is installed on the side wall of the funnel 304, a second monitor 7 is installed on the roller support rod 301 near the molding box 501, and a third monitor 8 is installed inside the molding box 501.

[0066] In the above scheme, the first monitor 6 is used to monitor the running status of crushed gangue on the conveyor belt 303 and the presence of impurities in real time; the second monitor 7 is used to monitor the condition of the extrusion plate in real time; and the third monitor 8 is used to monitor the forming condition of the gangue.

[0067] Specifically, the molding box 501 includes a base plate 50101, a front side plate 50102 and a rear side plate 50103 vertically disposed on the base plate 50101, and a top plate 50104 disposed on the top of the front side plate 50102 and the rear side plate 50103.

[0068] A hydraulic control system is presented, such as Figure 3 As shown, the hydraulic control system controls the first hydraulic rod 503 and the second hydraulic rod 504 in the rapid construction device for gangue walls in underground coal mines; it includes a first bidirectional hydraulic lock 11 and a second bidirectional hydraulic lock 12 connected to the first cylinder 9 of the first hydraulic rod 503 and the second cylinder 10 of the second hydraulic rod 504 respectively; a first three-position four-way solenoid directional valve 13 is connected to the first bidirectional hydraulic lock 11, and a second three-position four-way solenoid directional valve 14 is connected to the second bidirectional hydraulic lock 12. The first three-position four-way solenoid directional valve 13 and the second three-position four-way solenoid directional valve 14 are both connected to one end of the overflow valve 15 and one end of the metering pump 16. The other end of the overflow valve 15 and the other end of the metering pump 16 are both connected to the oil tank 17. A drive motor 18 is connected to the metering pump 16.

[0069] The first bidirectional hydraulic lock 11 includes a first left pilot check valve 1101 and a first right pilot check valve 1102. The two ends of the first left pilot check valve 1101 are respectively connected to the lower chamber of the first cylinder 9 and the first three-position four-way solenoid directional valve 13. The two ends of the first right pilot check valve 1102 are respectively connected to the upper chamber of the first cylinder 9 and the first three-position four-way solenoid directional valve 13.

[0070] The second bidirectional hydraulic lock 12 includes a second left pilot check valve 1201 and a second right pilot check valve 1202. The two ends of the second left pilot check valve 1201 are respectively connected to the lower chamber of the second cylinder 10 and the second three-position four-way solenoid directional valve 14. The two ends of the second right pilot check valve 1202 are respectively connected to the upper chamber of the second cylinder 10 and the second three-position four-way solenoid directional valve 14.

[0071] Specifically, a cooler 19 is provided between the overflow valve 15 and the oil tank 17 to cool the hot oil in the oil tank.

[0072] Specifically, a filter 20 is installed between the fixed displacement pump 16 and the oil tank 17 to filter impurities in the hydraulic oil in the oil tank.

[0073] A rapid construction method for underground gangue walls in coal mines is also presented, employing a rapid construction device and hydraulic control system for underground gangue walls in coal mines, specifically including the following steps:

[0074] Step 1: The crushed gangue collected by hopper 304 is transferred to belt conveyor 303 through discharge port;

[0075] Step 2: By rotating the belt conveyor roller 302 on the roller support rod 301, the belt 303 moves, thereby conveying the crushed gangue on the belt 303 into the forming box 501. By adjusting the first hydraulic rod 503 and the second hydraulic rod 504, the top of the extrusion plate 505 is located below the belt 303, and the bottom of the extrusion plate 505 is located on the lateral rear side of the forming box 501.

[0076] Step 3: When the crushed gangue above the extrusion plate 505 is full to the molding box 501, start the A binder conveying pump 40103 and B binder conveying pump 40104 in the AB binder storage box 401. The A binder and B binder are conveyed to the mixer 40201 in the binder mixing box 402 through the AB binder conveying pipe 403 for mixing and stirring to obtain mixed binder.

[0077] Step 4: The mixed binder is conveyed to the two binder conveying pipes 502 through the two output pipes of the mixed binder conveying pump 40202, and flows out from their respective discharge holes 506 into the uncompacted crushed gangue.

[0078] Step 5: After the set amount of mixed binder material has flowed into the crushed gangue in the molding box 501, the top of the material extrusion plate 505 is moved away from the belt 303 and the bottom of the extrusion plate 505 is moved closer to the belt 303 by adjusting the first hydraulic rod 503 and the second hydraulic rod 504 to extrude and obtain the initial-formed gangue block.

[0079] Step 6: By starting the engine 102, the wheel 103 is driven to move closer to the forming box 501, and the first hydraulic rod 503 and the second hydraulic rod 504 are adjusted so that the top and bottom ends of the extrusion plate 505 move away from the belt 303 to form the formed gangue block.

[0080] Step 7: Repeat steps 1 to 6 to construct pre-formed gangue blocks in the goaf area and pile them up to form strip retaining walls.

[0081] In the above technical solution, step 2 is used to facilitate the stacking of crushed gangue above the extrusion plate 505. The inclined state of the extrusion plate 505 is achieved by the retraction of the upper hydraulic rod and the extension of the lower hydraulic rod. In step 4, the multiple discharge holes 506 ensure that there is cementing material in the crushed gangue at each position. The cementing material, which has been fully mixed, may expand to a certain extent in a short period of time, which further ensures that the crushed gangue can be fully filled with cementing material. In step 5, the initial-shaped gangue blocks are obtained by extrusion, ensuring that the crushed gangue with a certain cementation quickly has a certain supporting strength. After a certain period of time, the cementing material cools down, and the initial-shaped gangue blocks with self-supporting ability are obtained.

[0082] In addition, the above-mentioned construction method adds another way to treat coal gangue. Since the gangue block is mainly composed of granular gangue, the consumption of gangue is relatively large, which can effectively increase the amount of gangue processed in the mining area. It solves the technical problem of low utilization rate of gangue generated by coal mines in the existing technology, and also solves the problem of coal mines being unable to efficiently process the gangue generated in production, which causes ground accumulation and deterioration of the ground ecological environment.

[0083] Specifically, in step 2, by adjusting the first hydraulic rod 503 and the second hydraulic rod 504, the top end of the extrusion plate 505 is positioned below the belt 303, and the bottom end of the extrusion plate 505 is positioned laterally behind the forming box 501. This includes the following:

[0084] Adjust the first three-position four-way solenoid directional valve 13 to the upper position, open the metering pump 16 so that the pressure oil supplied by the metering pump 16 enters the upper position of the first three-position four-way solenoid directional valve 13, passes through the first right pilot check valve 1102 of the first bidirectional hydraulic lock 11, and finally enters the upper chamber of the first cylinder 9. The return oil from the lower chamber of the first cylinder 9 passes through the first left pilot check valve 1101 of the first bidirectional hydraulic lock 11 and finally flows into the oil tank 17, causing the first hydraulic rod 503 to retract.

[0085] Adjust the second three-position four-way solenoid directional valve 14 to its lower position, open the metering pump 16 so that the pressure oil supplied by the metering pump 16 enters the lower position of the second three-position four-way solenoid directional valve 14, passes through the second left pilot check valve 1201 of the second bidirectional hydraulic lock 12, and finally enters the lower chamber of the second cylinder 10. The return oil from the upper chamber of the second cylinder 10 passes through the second right pilot check valve 1202 of the second bidirectional hydraulic lock 12 and finally flows into the oil tank, causing the second hydraulic rod 504 to extend.

[0086] Specifically, in step 5, by adjusting the first hydraulic rod 503 and the second hydraulic rod 504, the top end of the material extrusion plate 505 moves away from the belt 303, and the bottom end of the extrusion plate 505 moves closer to the belt 303. This includes the following:

[0087] Adjust the first three-position four-way solenoid directional valve 13 to the lower position, open the metering pump 16 so that the pressure oil supplied by the metering pump 16 enters the lower position of the first three-position four-way solenoid directional valve 13, passes through the first left pilot check valve 1101 of the first bidirectional hydraulic lock 11, and finally enters the lower chamber of the first cylinder 9. The return oil from the upper chamber of the first cylinder 9 passes through the first right pilot check valve 1102 of the first bidirectional hydraulic lock 11 and finally flows into the oil tank 17, causing the first hydraulic rod 503 to extend.

[0088] Adjust the second three-position four-way solenoid directional valve 14 to the upper position, open the metering pump 16 so that the pressure oil supplied by the metering pump 16 enters the upper position of the second three-position four-way solenoid directional valve 14, passes through the second right pilot check valve 1202 of the second bidirectional hydraulic lock 12, and finally enters the upper chamber of the second cylinder 10. The return oil from the lower chamber of the second cylinder 10 passes through the second left pilot check valve 1201 of the second bidirectional hydraulic lock 12 and finally flows into the oil tank 17, causing the second hydraulic rod 504 to retract.

[0089] Specifically, in step 6, the first hydraulic rod 503 and the second hydraulic rod 504 are adjusted so that the top and bottom ends of the extrusion plate 505 move away from the belt 303. This includes the following:

[0090] By adjusting the first three-position four-way solenoid directional valve 13 and the second three-position four-way solenoid directional valve 14 to their lower positions, the metering pump 16 is opened, causing the pressure oil supplied by the metering pump 16 to flow through the lower positions of the first three-position four-way solenoid directional valve 13 and the second three-position four-way solenoid directional valve 14, respectively, and then to the first left pilot check valve 1101 of the first bidirectional hydraulic lock 11 and the second left pilot check valve 1201 of the second bidirectional hydraulic lock 12, and finally into the lower chamber of the first cylinder 9 and the lower chamber of the second cylinder 10, respectively. Simultaneously, when hydraulic oil flows into the first left pilot check valve 1101 of the first bidirectional hydraulic lock 11 and the second left pilot check valve 1201 of the second bidirectional hydraulic lock 12, the pilot oil inside each of them flows into the corresponding right pilot check valve, opening the reflux switch to cause the hydraulic oil in the upper chamber of the first cylinder 9 and the upper chamber of the second cylinder 10 to flow back to the oil tank 17 through the first right pilot check valve 1102 and the second right pilot check valve 1202 respectively, so as to achieve the simultaneous extension of the first hydraulic rod 503 and the second hydraulic rod 504.

Claims

1. A rapid construction device for gangue walls in underground coal mines, comprising a support mechanism (1), wherein the support mechanism (1) includes a chassis (101), an engine (102) is mounted on the chassis (101), and two pairs of wheels (103) are mounted on both sides of the chassis (101), characterized in that, The chassis (101) is also provided with a box (2), the top of the box (2) is provided with a gangue conveying mechanism (3), the box (2) is provided with a binder mixing mechanism (4), and the rear end of the box (2) is provided with a gangue block forming mechanism (5). The gangue conveying mechanism (3) includes multiple sets of roller support rods (301) fixed on the upper surface of the box (2). Each set of roller support rods (301) is equipped with a belt conveyor roller (302) at its top. All belt conveyor rollers (302) are connected by belts (303). A funnel (304) is also provided above the front end of the box (2). The outlet of the funnel (304) is located on one side of the belt (303). The binder mixing mechanism (4) includes an AB binder storage tank (401) and a binder mixing tank (402), which are connected by an AB binder conveying pipe (403). The AB binder storage tank (401) includes an A binder tank (40101) and a B binder tank (40102). The A binder tank (40101) is equipped with an A binder conveying pump (40103), and the B binder tank (40102) is equipped with an A binder conveying pump (40103). The material bin (40102) is equipped with a B binder conveying pump (40104). The output pipes of the A binder conveying pump (40103) and the B binder conveying pump (40104) are both connected to one end of the AB binder conveying pipe (403). The binder mixing bin (402) is equipped with a mixer (40201) and a mixing binder conveying pump (40202). The output pipe of the mixing binder conveying pump (40202) extends out of the binder mixing bin (402) and is divided into two paths. The gangue block forming mechanism (5) includes a forming box (501) and two cementitious material conveying pipes (502) with one end connected to the two ends of the output pipe of the mixed cementitious material conveying pump (40202). The left and right sides of the forming box (501) are open, and the top of the belt (303) is aligned with the top of the opening on the left side of the forming box (501). The other end of one of the cementitious material conveying pipes (502) extends into the forming box (501) and is located on the top side, and the other end of the other cementitious material conveying pipe (502) extends into the forming box (501) and is located on the bottom side. It also includes a pair of first hydraulic rods (503) and a pair of second hydraulic rods (504) with one end hinged to the box body (2). The other ends of the first hydraulic rods (503) and the second hydraulic rods (504) are respectively hinged to the top and bottom of the extrusion plate (505). The extrusion plate (505) is located inside the forming box (501). The binder conveying pipe (502) is provided with a plurality of discharge holes (506) evenly distributed on it.

2. The rapid construction device for underground gangue walls in coal mines as described in claim 1, characterized in that, A first monitor (6) is provided on the side wall of the funnel (304), a second monitor (7) is provided on the roller support rod (301) near the molding box (501), and a third monitor (8) is provided inside the molding box (501).

3. The rapid construction device for underground gangue walls in coal mines as described in claim 1, characterized in that, The molding box (501) includes a bottom plate (50101), a front side plate (50102) and a rear side plate (50103) vertically disposed on the bottom plate (50101), and a top plate (50104) disposed on the top of the front side plate (50102) and the rear side plate (50103).

4. A hydraulic control system, characterized in that, The hydraulic control system controls the first hydraulic rod (503) and the second hydraulic rod (504) in the rapid construction device for the gangue wall in the coal mine as described in any one of claims 1 to 3; it includes a first bidirectional hydraulic lock (11) and a second bidirectional hydraulic lock (12) respectively connected to the first cylinder (9) of the first hydraulic rod (503) and the second cylinder (10) of the second hydraulic rod (504); the first bidirectional hydraulic lock (11) is connected to a first three-position four-way solenoid valve (13), the second bidirectional hydraulic lock (12) is connected to a second three-position four-way solenoid valve (14), the first three-position four-way solenoid valve (13) and the second three-position four-way solenoid valve (14) are both connected to one end of the overflow valve (15) and one end of the metering pump (16), the other end of the overflow valve (15) and the other end of the metering pump (16) are both connected to the oil tank (17), and the metering pump (16) is connected to a drive motor (18). The first bidirectional hydraulic lock (11) includes a first left pilot check valve (1101) and a first right pilot check valve (1102). The two ends of the first left pilot check valve (1101) are respectively connected to the lower chamber of the first cylinder (9) and the first three-position four-way solenoid directional valve (13). The two ends of the first right pilot check valve (1102) are respectively connected to the upper chamber of the first cylinder (9) and the first three-position four-way solenoid directional valve (13). The second bidirectional hydraulic lock (12) includes a second left pilot check valve (1201) and a second right pilot check valve (1202). The two ends of the second left pilot check valve (1201) are respectively connected to the lower chamber of the second cylinder (10) and the second three-position four-way solenoid valve (14). The two ends of the second right pilot check valve (1202) are respectively connected to the upper chamber of the second cylinder (10) and the second three-position four-way solenoid valve (14).

5. The hydraulic control system as described in claim 4, characterized in that, A cooler (19) is provided between the overflow valve (15) and the oil tank (17).

6. The hydraulic control system as described in claim 4, characterized in that, A filter (20) is provided between the metering pump (16) and the oil tank (17).

7. A rapid construction method for gangue walls in underground coal mines, characterized in that, The rapid construction device for underground gangue walls in coal mines according to any one of claims 1 to 3 and the hydraulic control system according to any one of claims 4 to 6 specifically include the following steps: Step 1: The crushed gangue collected by the funnel (304) is transferred to the conveyor belt (303) through the discharge port; Step 2: By rotating the belt conveyor roller (302) on the roller support rod (301), the belt (303) moves, thereby conveying the crushed gangue on the belt (303) into the forming box (501). By adjusting the first hydraulic rod (503) and the second hydraulic rod (504), the top of the extrusion plate (505) is located below the belt (303), and the bottom of the extrusion plate (505) is located on the lateral rear side of the forming box (501). Step 3: When the crushed gangue above the extrusion plate (505) is full in the molding box (501), start the A binder conveying pump (40103) and B binder conveying pump (40104) in the AB binder storage box (401), and convey the A binder and B binder to the mixer (40201) in the binder mixing box (402) through the AB binder conveying pipe (403) for mixing and stirring to obtain mixed binder; Step 4: The mixed binder is conveyed to the two binder conveying pipes (502) through the two output pipes of the mixed binder conveying pump (40202), and flows out from their respective discharge holes (506) into the uncompacted crushed gangue; Step 5: After the set amount of mixed binder material has flowed into the crushed gangue in the molding box (501), the top of the material extrusion plate (505) is moved away from the belt (303) and the bottom of the extrusion plate (505) is moved closer to the belt (303) by adjusting the first hydraulic rod (503) and the second hydraulic rod (504) to extrude and obtain the initial-formed gangue blocks. Step 6: By starting the engine (102) to drive the wheel (103) to move closer to the forming box (501), and adjusting the first hydraulic rod (503) and the second hydraulic rod (504), the top and bottom ends of the extrusion plate (505) are moved away from the belt (303) to form a formed gangue block; Step 7: Repeat steps 1 to 6 to construct pre-formed gangue blocks in the goaf area and pile them up to form strip retaining walls.

8. The rapid construction method for underground gangue walls in coal mines as described in claim 7, characterized in that, In step 2, by adjusting the first hydraulic rod (503) and the second hydraulic rod (504), the top end of the extrusion plate (505) is positioned below the belt (303), and the bottom end of the extrusion plate (505) is positioned laterally behind the forming box (501). Specifically, this includes the following: Adjust the first three-position four-way solenoid directional valve (13) to the upper position, open the metering pump (16) so that the pressure oil supplied by the metering pump (16) enters the upper position of the first three-position four-way solenoid directional valve (13), passes through the first right pilot check valve (1102) of the first bidirectional hydraulic lock (11), and finally enters the upper chamber of the first cylinder (9). The return oil from the lower chamber of the first cylinder (9) passes through the first left pilot check valve (1101) of the first bidirectional hydraulic lock (11) and finally flows into the oil tank (17), causing the first hydraulic rod (503) to retract. Adjust the second three-position four-way solenoid directional valve (14) to its lower position, open the metering pump (16) so that the pressure oil supplied by the metering pump (16) enters the lower position of the second three-position four-way solenoid directional valve (14), passes through the second left pilot check valve (1201) of the second bidirectional hydraulic lock (12), and finally enters the lower chamber of the second cylinder (10). The return oil from the upper chamber of the second cylinder (10) passes through the second right pilot check valve (1202) of the second bidirectional hydraulic lock (12) and finally flows into the oil tank, causing the second hydraulic rod (504) to extend.

9. The rapid construction method for underground gangue walls in coal mines as described in claim 7, characterized in that, In step 5, adjusting the first hydraulic rod (503) and the second hydraulic rod (504) causes the top end of the material extrusion plate (505) to move away from the belt (303) and the bottom end of the extrusion plate (505) to move closer to the belt (303). This specifically includes the following: Adjust the first three-position four-way solenoid directional valve (13) to its lower position, open the metering pump (16) so that the pressure oil supplied by the metering pump (16) enters the lower position of the first three-position four-way solenoid directional valve (13), passes through the first left pilot check valve (1101) of the first bidirectional hydraulic lock (11), and finally enters the lower chamber of the first cylinder (9). The return oil from the upper chamber of the first cylinder (9) passes through the first right pilot check valve (1102) of the first bidirectional hydraulic lock (11) and finally flows into the oil tank (17), causing the first hydraulic rod (503) to extend. Adjust the second three-position four-way solenoid directional valve (14) to the upper position, open the metering pump (16) so that the pressure oil supplied by the metering pump (16) enters the upper position of the second three-position four-way solenoid directional valve (14), passes through the second right pilot check valve (1202) of the second bidirectional hydraulic lock (12), and finally enters the upper chamber of the second cylinder (10). The return oil from the lower chamber of the second cylinder (10) passes through the second left pilot check valve (1201) of the second bidirectional hydraulic lock (12) and finally flows into the oil tank (17), causing the second hydraulic rod (504) to retract.

10. The rapid construction method for underground gangue walls in coal mines as described in claim 7, characterized in that, In step 6, adjusting the first hydraulic rod (503) and the second hydraulic rod (504) so ​​that the top and bottom ends of the extrusion plate (505) move away from the belt (303) specifically includes the following: By adjusting the first three-position four-way solenoid directional valve (13) and the second three-position four-way solenoid directional valve (14) to their lower positions, the metering pump (16) is opened, causing the pressure oil supplied by the metering pump (16) to flow through the lower positions of the first three-position four-way solenoid directional valve (13) and the second three-position four-way solenoid directional valve (14), respectively, to the first left pilot check valve (1101) of the first bidirectional hydraulic lock (11) and the second left pilot check valve (1201) of the second bidirectional hydraulic lock (12), and finally into the lower chamber of the first cylinder (9) and the second cylinder (10), respectively. In the lower chamber, at the same time, when the hydraulic oil flows into the first left pilot check valve (1101) of the first bidirectional hydraulic lock (11) and the second left pilot check valve (1201) of the second bidirectional hydraulic lock (12), the pilot oil inside each flows into the corresponding right pilot check valve, and the return switch is opened to cause the hydraulic oil in the upper chamber of the first cylinder (9) and the hydraulic oil in the upper chamber of the second cylinder (10) to flow back to the oil tank (17) through the first right pilot check valve (1102) and the second right pilot check valve (1202), respectively, so as to realize the simultaneous extension of the first hydraulic rod (503) and the second hydraulic rod (504).

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