A soft and broken thin vein filling mining method and filling device

Abstract

This patent application belongs to the field of mining filling technology, specifically relating to a filling device for weak, broken, thin ore veins, including a movable frame and a filling frame. The movable frame is equipped with a lifting mechanism, and a jacking plate is installed at the movable end of the lifting mechanism. A limiting frame is provided at the upper end of the jacking plate. Multiple elastic supports are provided laterally at the lower part of the filling frame, and a grouting port is provided at the bottom of the filling frame. Grouting is performed through a pipe at the grouting port. A first rope winding mechanism can wind and unwind a first rope and fix the end of the first rope to the movable frame. A second rope winding mechanism can wind and unwind a second rope and drive the lifting mechanism to lift the frame via the second rope. The patent also relates to a mining method for filling weak, broken, thin ore veins, where workers do not need to enter narrow, unstable filling areas and can safely complete the insertion, positioning, and retrieval of the filling frame. After the jacking plate pushes the filling frame into the goaf, it simultaneously acts as a temporary sealing plate to close the opening and prevent grout leakage.

Description

[0001] This invention relates to the field of mining filling technology, specifically to a mining method and filling device for filling weak, broken, thin ore veins. Background Technology

[0002] During the mining of weak, broken, and thin ore veins, due to the soft and broken ore body and surrounding rock, cementation, and poor self-stability, the goaf is prone to safety accidents such as collapse and sliding. Therefore, it is usually necessary to fill the goaf.

[0003] The prior art (CN207647558U) discloses a filling device for mining weak and broken thin veins to improve the filling effect. It includes a mixing tank, a mortar pump and a hollow bamboo support frame composed of horizontal bars, vertical bars and bottom bars. The frame serves as both a filling skeleton and a grouting channel, which improves the stability of the filling body to a certain extent.

[0004] The device has the following shortcomings in practical applications: First, for small-scale filling (local cavities formed by over-excavation due to rock breakage during mining, cavities formed by partial collapse of the roadway roof, and filling required beside the pillar), the horizontal bars, vertical bars, and bottom bars need to be assembled inside the goaf, but personnel cannot enter or the risk of entry is extremely high, making construction difficult to implement; Second, the device only relies on the friction between the frame itself and the surrounding rock to prevent the slurry from sliding down, without setting any structure to seal the openings, so the slurry is easy to leak from the openings in the goaf, resulting in incomplete filling and material waste. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a filling device for weak and broken thin veins. Workers do not need to enter the narrow and unstable filling area. The filling frame can be sent in, positioned and retrieved from a safe position. After the jacking plate pushes the filling frame into the goaf, it also acts as a temporary sealing plate to close the opening and prevent the slurry from leaking out.

[0006] The technical solution adopted in this invention is as follows: A filling device for weak and broken thin ore veins includes a movable frame and a filling frame. The movable frame is provided with a lifting mechanism. A lifting plate is installed at the movable end of the lifting mechanism. A limiting frame is provided at the upper end of the lifting plate. The lower part of the filling frame is provided with multiple elastic legs, which are pressed against the inside of the limiting frame. The bottom of the filling frame is provided with a grouting port, and grouting is carried out through the grouting port through a pipe. It also includes a first rope winding mechanism and a second rope winding mechanism. The first rope winding mechanism can wind and unwind the first rope and fix the end of the first rope to the movable frame. The second rope winding mechanism can wind and unwind the second rope and drive the lifting mechanism to lift through the second rope. The mobile frame moves along the tunnel to the side of the filling area. The second rope winding mechanism lifts the filling frame by winding the rope until the lifting plate blocks the opening of the filling area. The filling frame enters the filling area and is supported by the elastic legs on the inner wall of the filling area for pouring. After the pouring is completed, the mobile frame, lifting plate and limiting frame are retrieved by winding the rope through the first rope winding mechanism and the second rope winding mechanism.

[0007] Working principle: The tunnel generally extends downwards at an angle, and the area to be filled is located on the side of the tunnel. Using this device, workers do not need to enter the tunnel. The first rope winding mechanism controls the movement distance of the moving frame, so that the lifting plate is on the side of the area to be filled. The second rope winding mechanism controls the lifting mechanism to raise the lifting plate until it blocks the opening of the area to be filled. At this time, the filling frame enters the area to be filled, the filling frame disengages from the limiting frame, and the elastic support legs open to support the inner wall of the area to be filled. At this time, the area to be filled forms a relatively closed area, and grouting is carried out through the pipe. After the grouting is completed, wait for it to initially solidify, and then use the first and second rope winding mechanisms to wind up the ropes to retrieve the entire device.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the rope control of the first and second rope winding mechanisms, workers do not need to enter the narrow and unstable filling area. They can complete the feeding, positioning and retrieval of the filling frame from a safe position, reducing personnel risks.

[0009] 2. After the jacking plate pushes the filling frame into the goaf, it also acts as a temporary sealing plate to close the opening and prevent grout leakage. The elastic support legs of the filling frame automatically tighten against the inner wall of the surrounding rock to form a permanent reinforcing skeleton. The two work together to simplify the construction process.

[0010] 3. After grouting is completed, the moving frame, lifting plate and limiting frame can all be recovered by the rope winding mechanism, and only the filling frame remains in the goaf. The equipment has high utilization rate and good economic efficiency.

[0011] 4. The flexible support feet can adapt to the uneven rock walls of the goaf within a certain range, ensuring the stability of the filling frame and eliminating the need for additional repairs to the goaf.

[0012] In a preferred embodiment of the present invention, both the first rope winding mechanism and the second rope winding mechanism include a drive motor and an active rope winding reel. The lifting mechanism includes a shear-type lifting platform. The input end of the shear-type lifting platform includes a sliding rail. A slider is slidably installed in the sliding rail. A passive rope reel is installed on the slider. The passive rope reel is connected to a corresponding active rope reel by a rope. The rope length is the same as the moving length of the moving frame. The movement of the slider can cause the shear-type lifting platform to rise and fall.

[0013] Working principle: Before releasing the rope, the passive rope reel is equipped with a rope of a corresponding moving distance. During the rope release process, the active rope reel of the first rope reel continuously releases the rope, and the passive rope reel of the second rope reel also continuously releases the rope. Since the entire device is inclined downwards, the moving frame automatically descends. Its descent speed can be controlled by the drive motor, and the slider is at the lowest end of the sliding rail. When it reaches the designated position, the rope on the passive rope reel is completely released, and the ropes on both the passive and active rope reels are completely taut and cannot move further. Thus, the moving distance can be controlled according to the rope, allowing it to reach the designated position. The active rope reel of the second rope reel winds the rope, and the passive rope reel is moved upwards along the sliding rail, thereby replacing the drive part of the conventional shear-type lifting platform. This causes the shear-type lifting platform to rise towards the area to be filled. When the lifting plate seals the opening, it cannot move. The load driven by the motor can be used to determine that the sealing is complete, thus stopping further dragging. After the pouring is completed, the first rope reel starts to drag first, the slider moves relative to each other, the lifting plate descends, and the first and second rope reel mechanisms then start to wind the rope synchronously.

[0014] Beneficial effects: The system precisely controls the stopping position of the moving frame using rope length, eliminating the need for additional sensors or electrical control systems. It adapts to complex downhole environments, offering low cost and high reliability. The second rope winding mechanism drives the slider along the sliding rail, which in turn lifts the shear-type lifting platform, converting the linear motion of the rope winding into lifting motion, eliminating the need for traditional hydraulic or pneumatic drives. After the lifting plate seals the opening, the motor load increases significantly, serving as a signal to indicate when the system is in position, allowing operators to stop the rope winding promptly and avoid overload. During retrieval, the first rope winding mechanism lowers the lifting plate away from the filling frame first, then the rope is simultaneously wound up to retrieve the entire machine. This logical sequence of actions prevents jamming.

[0015] In a preferred embodiment of the present invention, a fixed frame is also included. The fixed frame is installed on the outside of the lifting mechanism. The lifting plate moves up and down along the fixed frame. When the moving frame moves, the filling frame is located inside the fixed frame.

[0016] Beneficial effects: By setting up a fixed frame, the filling frame is protected during transportation and the lifting plate is guided.

[0017] In a preferred embodiment of the present invention, the top outer edge of the lifting plate is provided with an annular groove, the annular groove is provided with an elastic part, the limiting frame is installed on the elastic part, the outer wall of the limiting frame slides along the fixed frame, and the elastic support foot of the filling frame can rest against the limiting frame.

[0018] Working principle: With the above settings, when the filling frame is not lifted, it is locked in the limiting frame by the elastic support legs to ensure its stability. After lifting, the limiting frame first contacts the outside of the opening of the area to be filled, squeezes the elastic part, and contracts inward until the limiting frame and the lifting plate are both in contact with the outside of the opening. During this process, the elastic support legs fall off and open and press against the inside of the filling area.

[0019] Beneficial effects: The elastic section enables the floating installation of the limiting frame, allowing the limiting frame to contact and compress the rock wall first during the jacking process, thereby automatically releasing the elastic support legs without the need for additional control mechanisms.

[0020] In a preferred embodiment of the present invention, the inner wall of the limiting frame is provided with a rubber surface.

[0021] Beneficial effect: By adding a rubber surface, the friction between the rubber surface and the elastic support feet is increased, making it more stable.

[0022] In a preferred embodiment of the present invention, the filling frame is composed of multiple horizontal tubes and vertical tubes, which are interconnected, and the outer wall of the horizontal tubes is provided with multiple slurry outlet holes.

[0023] Beneficial effects: Based on the area to be filled, it can freely assemble itself within a certain range to form different filling frames, thus providing support within the area to be filled.

[0024] In a preferred embodiment of the present invention, one of the vertical pipes is provided with a slurry inlet hole at the bottom, and a slurry inlet pipe is installed inside the lifting plate, with the slurry inlet pipe communicating with the slurry inlet hole.

[0025] Beneficial effects: This setting allows for bottom slurry inlet, which helps to expel air from the pipe and facilitates direct separation of the lifting plate after solidification.

[0026] In a preferred embodiment of the present invention, sealing plates are provided at both ends of the horizontal tube, and elastic sheets are fixedly connected to the sealing plates. Friction blocks are provided at the outer ends of the elastic sheets. The elastic sheets are flexible and abut against the limiting frame through the friction blocks.

[0027] Beneficial effects: The lateral length is compressed by bending the elastic sheet, and it can be stretched and tightened after release.

[0028] This invention also provides a method for mining weak, fractured, thin ore veins using the aforementioned weak, fractured, thin ore vein filling device, comprising the following steps: S1: Place the filling frame on the lifting plate inside the moving frame, so that the elastic support at the bottom of the filling frame is pressed against the inside of the limiting frame, connect the grouting pipe to the grouting port at the bottom of the filling frame, and set the rope of the corresponding length on the passive rope reel. S2: By winding and unwinding the rope through the first rope winding mechanism, the moving frame is pulled along the roadway to the side of the area to be filled, so that the lifting plate is aligned with the opening of the area to be filled; S3: Start the second rope winding mechanism, the rope winding drives the lifting mechanism to raise the top plate; the filling frame is lifted and disengaged from the limit frame, the elastic support legs automatically pop out and tighten on the inner wall of the area to be filled; continue to lift until the top plate seals the opening of the area to be filled. S4: Inject filling grout into the grouting port at the bottom of the filling frame through the grouting pipe. The grout flows out from the grout outlet through the internal channel of the filling frame, filling the entire area to be filled, and waiting for solidification. S5: With the assistance of the first rope winding mechanism, the lifting plate is disengaged from the filling frame; then the first rope winding mechanism and the second rope winding mechanism simultaneously wind up the rope to pull the moving frame, the lifting plate and the limiting frame back into the roadway as a whole. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the filling device for weak and broken thin ore veins of the present invention; Figure 2 This is a schematic diagram of the structure within the fixed frame of Embodiment 1 of the filling device for weak and broken thin veins of the present invention; Figure 3 This is a three-dimensional sectional view within the fixed frame of Embodiment 1 of the filling device for weak, broken, thin ore veins of the present invention; Figure 4 This is a schematic diagram of the filling frame structure in Embodiment 1 of the weak, broken, thin vein filling device of the present invention.

[0030] The reference numerals in the attached drawings include: movable frame 1, filling frame 2, horizontal pipe 201, slurry outlet 2011, vertical pipe 202, slurry inlet 203, elastic sheet 204, friction block 205, lifting mechanism 3, sliding rail 301, slider 302, lifting plate 4, annular groove 401, elastic part 402, slurry inlet pipe 403, limiting frame 5, rubber surface 501, fixed frame 6, first rope winding mechanism 7, first rope 701, second rope winding mechanism 8, second active rope winding reel 801, second rope 802, passive rope winding reel 803, and third tube winding mechanism 9. Detailed Implementation

[0031] Typical embodiments embodying the features and advantages of the present invention will be specifically described in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0032] Example 1: In the description of this application, the terms "first", "second", etc. are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] See Figure 1 As shown in the figure, this embodiment discloses a filling device for weak and broken thin ore veins, including a movable frame 1, a filling frame 2, a lifting mechanism 3, a lifting plate 4, a limiting frame 5, a fixed frame 6, a first rope winding mechanism 7, and a second rope winding mechanism 8.

[0034] Among them, see Figure 2 As shown, the movable frame 1 is a rectangular base structure welded from steel profiles, with a sliding shoe at the bottom for sliding along the inclined tunnel. A lifting mechanism 3 is installed inside the movable frame 1; in this embodiment, the lifting mechanism 3 is a shear-type lifting platform. This shear-type lifting platform includes two sets of cross-hinged support arms, one side of which is hinged to the movable frame 1, and the other side is connected to a slider 302 via a sliding rail 301. The slider 302 is slidably mounted within the sliding rail 301, and a passive rope reel 803 is fixed to the slider 302. A lifting plate 4 is mounted on the movable end (i.e., the upper end) of the shear-type lifting platform via a hinge.

[0035] In this embodiment, the movable frame 1 and the upper structure are in a vertical state, which is directly above the area to be filled. When the area to be filled is located on the side, the movable frame 1 with different tilt angles can be designed to change the lifting direction and achieve side filling.

[0036] Among them, see Figure 3 As shown, the lifting plate 4 is a rectangular thick steel plate with an annular groove 401 formed along its outer top edge. An elastic part 402, which is a compression spring assembly, is embedded within the annular groove 401. A limiting frame 5, a rectangular frame with a rubber surface 501 attached to its inner wall, is installed on the elastic part 402. The outer wall of the limiting frame 5 slides against the inner wall of the fixed frame 6 welded to the movable frame 1. During the movement of the entire device along the tunnel, the filling frame 2 is concealed within the fixed frame 6, thus receiving effective protection.

[0037] Among them, see Figure 4As shown, the filling frame 2 consists of multiple horizontal pipes 201 and vertical pipes 202 that are fixedly connected to each other, and all pipes are interconnected, forming a frame structure that serves as both a grouting channel and a permanent skeleton. A grout inlet 203 is provided at the lower end of one of the vertical pipes 202 located at the bottom, and multiple grout outlet holes 2011 are provided around the perimeter of the horizontal pipe 201. A sealing plate is provided inside each end of the horizontal pipe 201. The elastic support is an outwardly extending elastic sheet 204 welded to the sealing plate, with a friction block 205 fixedly connected to its outer end. The friction block 205 has anti-slip teeth on its surface. In a free state, the elastic sheet 204 arches outward, and the friction block 205 extends beyond the end of the horizontal pipe 201. When the filling frame 2 is pressed into the limiting frame 5, the elastic sheet 204 is forced to bend, and the friction block 205 abuts against the rubber surface 501 of the inner wall of the limiting frame 5, thereby ensuring the stability of the filling frame 2 during transportation. When the filling frame 2 is placed on the lifting plate 4, all the elastic supports are constrained by the side walls of the limiting frame 5, and are in a retracted state, relying on their own elasticity to firmly abut against the inner wall of the limiting frame 5. The bottom of the filling frame 2 is provided with a grouting port, and the lifting plate 4 is equipped with a grouting pipe 403. When the filling frame 2 is placed in place, the upper port of the grouting pipe 403 is aligned with and connected to the grouting hole 203, and the lower port is connected to the external grouting pump through a pipeline.

[0038] In this embodiment, to save costs, the filling frame 2 and the elastic sheet 204 can be made of bamboo. In other embodiments, to ensure structural stability, metal materials can also be used. The elastic support is a spring steel plate that is pre-bent outward and welded to the horizontal tube 201 at the root.

[0039] The first rope winding mechanism 7 and the second rope winding mechanism 8 are both located in the safe area at the entrance of the tunnel, and both include a drive motor and an active rope winding reel. The first rope 701 of the first rope winding mechanism 7 is fixedly connected to the front end of the moving frame 1 for winding and releasing the moving frame 1. The second rope winding mechanism 8 includes a second active rope winding reel 801 and a second rope 802. One end of the second rope 802 is wound around the second active rope winding reel 801, and the other end, after passing through a guide wheel, is wound around the passive rope winding reel 803 on the aforementioned slider 302. The length of the second rope 802 is preset to be exactly equal to the distance the moving frame 1 needs to travel from its starting position to the side of the filling area.

[0040] In this embodiment, a third tube winding mechanism 9 is also included, which uses a motor-driven disc to collect the slurry inlet pipe 403 during recycling.

[0041] The method for backfilling weak, fractured, thin ore veins using the apparatus of this embodiment includes the following steps: S1: In the safe area of ​​the tunnel, place the pre-assembled filling frame 2 on the lifting plate 4 inside the moving frame 1, and press down forcefully to make its lower elastic support legs retract and press against the inner wall of the limiting frame 5. At the same time, the elastic plates 204 at both ends of the horizontal pipe 201 bend and the friction blocks 205 press against the rubber surface 501 to ensure the stability of the filling frame 2. Connect the top end of the grouting pipe 403 to the grouting hole 203 at the bottom of the filling frame 2, and connect the other end of the grouting pipe to the grouting pump. According to the distance of the area to be filled along the tunnel, wind a second rope 802 of a set length on the passive rope reel 803 so that the moving frame 1 reaches the working position just when the rope is fully released.

[0042] S2: Start the drive motor of the first rope winding mechanism 7, and slowly release the first rope 701. The moving frame 1 slides down the inclined tunnel under the action of gravity. At the same time, the active rope winding reel 801 of the second rope winding mechanism 8 releases the rope accordingly, so that the slider 302 is kept at the initial lowest position of the sliding rail 301. When the second rope 802 on the passive rope winding reel 803 is fully released and taut, the moving frame 1 stops moving. At this time, the lifting plate 4 is exactly aligned with the side of the opening of the filling area.

[0043] S3: Start the drive motor of the second rope winding mechanism 8 to wind up the second rope 802. The second rope 802 pulls the passive rope winding disc 803 and the slider 302 to move horizontally along the sliding rail 301, driving the support arm of the shear-type lifting platform to rise. The lifting plate 4 and the limiting frame 5 rise together along the inner wall of the fixed frame 6. The top of the limiting frame 5 first contacts the surrounding rock outside the opening of the area to be filled. As the lifting continues, the elastic part 402 is compressed, and the limiting frame 5 sinks relative to the lifting plate 4, and the upper part of the filling frame 2 is exposed from the limiting frame 5. At this time, the constraint of the elastic support foot is released, automatically springs outward and tightens against the inner wall of the area to be filled; the elastic plate 204 at the end of the horizontal tube 201 also returns to its bent shape, pushing the friction block 205 to press against the surrounding rock, so that the filling frame 2 is firmly locked in the empty area. Continue to lift until the upper surface of the lifting plate 4 completely presses against the edge of the opening of the area to be filled, forming a temporary seal. When the load on the drive motor increases significantly, it is determined that the blockage is in place and the rope winding stops.

[0044] S4: Grouting material is injected into the filling frame 2 through the grouting pipe and the grout inlet pipe 403 from the bottom grout inlet hole 203. The grout flows along the vertical pipe 202 and the horizontal pipe 201, and flows out evenly from each grout outlet hole 2011, gradually filling the entire area to be filled. During this period, the lifting plate 4 continuously seals the opening to prevent grout leakage. After grouting is completed, the grout is left to solidify until it has a certain self-supporting strength.

[0045] S5: After the slurry initially sets, briefly activate the first rope winding mechanism 7 to generate a small downward pulling force on the moving frame 1, causing the lifting plate 4 to detach from the filling frame 2. Then, simultaneously activate the first rope winding mechanism 7 and the second rope winding mechanism 8: the first rope winding mechanism 7 pulls the moving frame 1 towards the roadway entrance, while the second rope winding mechanism 8 assists in lifting while maintaining the tension of the second rope 802. The slider 302 resets, and the lifting plate 4 descends to its initial low position. Finally, the moving frame 1, lifting plate 4, limiting frame 5, and lifting mechanism 3 are pulled back to the safe area of ​​the roadway as a whole. The filling frame 2 remains in the goaf as a permanent support skeleton, completing one filling cycle.

[0046] It should be noted that for goaf areas of different sizes, only the specifications and quantity of the horizontal pipes 201 and vertical pipes 202 of the filling frame 2 need to be adjusted, and the rope length on the passive rope reel 803 needs to be changed accordingly to adapt. The mobile frame 1 and the lifting mechanism 3 and other recovery components can be reused, which is economical.

[0047] As can be seen from the above embodiments, workers do not need to enter unstable areas throughout the process. The double-rope mechanism can achieve precise walking positioning, automatic support release, and jacking and sealing. After completion, the entire device is recovered, and the filling is dense with no leakage. It is particularly suitable for small-scale filling operations such as local cavities and collapse cavities in weak, broken, and thin ore veins.

[0048] Example 2: Based on the first embodiment, during the grouting process, the rope 802 of the second rope mechanism 8 is always in a taut state. By controlling the drive motor to rotate forward and reverse to make small-amplitude alternating loosening and tightening actions (loosening for 0.5 seconds, tightening for 0.5 seconds, with a stroke of only a few millimeters), the rope tension generates periodic fluctuations, which are transmitted to the lifting plate through the lifting mechanism and then to the filling frame, forming low-frequency micro-vibration.

[0049] In this embodiment, poor slurry fluidity, large aggregate particle size, and pipe bends can all cause blockages and lead to local voids. The above solution enables the entire filling frame 2 to vibrate synchronously, which can maintain good slurry fluidity.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, based on an understanding of the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for filling weak, broken, thin ore veins, characterized in that: It includes a movable frame and a filling frame. The movable frame is equipped with a lifting mechanism. The movable end of the lifting mechanism is equipped with a lifting plate, and the upper end of the lifting plate is equipped with a limiting frame. The lower part of the filling frame is provided with multiple elastic legs, which are pressed against the inside of the limiting frame. The bottom of the filling frame is provided with a grouting port, and grouting is carried out through the grouting port through a pipe. It also includes a first rope winding mechanism and a second rope winding mechanism. The first rope winding mechanism can wind and unwind the first rope and fix the end of the first rope to the movable frame. The second rope winding mechanism can wind and unwind the second rope and drive the lifting mechanism to lift through the second rope. The mobile frame moves along the tunnel to the side of the filling area. The second rope winding mechanism lifts the filling frame by winding the rope until the lifting plate blocks the opening of the filling area. The filling frame enters the filling area and is supported by the elastic legs on the inner wall of the filling area for pouring. After the pouring is completed, the mobile frame, lifting plate and limiting frame are retrieved by winding the rope through the first rope winding mechanism and the second rope winding mechanism.

2. The filling device for weak, broken, thin ore veins according to claim 1, characterized in that: Both the first and second rope winding mechanisms include a drive motor and an active rope winding reel; The lifting mechanism includes a shear-type lifting platform. The input end of the shear-type lifting platform includes a sliding rail. A slider is slidably installed in the sliding rail. A passive rope reel is installed on the slider. The passive rope reel is connected to a corresponding active rope reel by a rope. The rope length is the same as the moving length of the moving frame. The movement of the slider can cause the shear-type lifting platform to rise and fall.

3. The filling device for weak, broken, thin ore veins according to claim 1, characterized in that: It also includes a fixed frame, which is installed on the outside of the lifting mechanism. The lifting plate moves up and down along the fixed frame, and the filling frame is located inside the fixed frame when the moving frame moves.

4. The filling device for weak, broken, thin ore veins according to claim 3, characterized in that: The top outer edge of the lifting plate is provided with an annular groove, and an elastic part is provided in the annular groove. The limiting frame is installed on the elastic part, and the outer wall of the limiting frame slides along the fixed frame. The elastic support foot of the filling frame can rest against the limiting frame.

5. The filling device for weak, broken, thin ore veins according to claim 4, characterized in that: The inner wall of the limiting frame is provided with a rubber surface.

6. The filling device for weak, broken, thin ore veins according to claim 1, characterized in that: The filling frame consists of multiple horizontal and vertical tubes, which are interconnected. The outer wall of the horizontal tubes is provided with multiple slurry outlet holes.

7. The filling device for weak, broken, thin ore veins according to claim 6, characterized in that: One of the vertical pipes has a slurry inlet hole at the bottom, and a slurry inlet pipe is installed inside the lifting plate, with the slurry inlet pipe connected to the slurry inlet hole.

8. The filling device for weak, broken, thin ore veins according to claim 6, characterized in that: Both ends of the horizontal tube are equipped with sealing plates, and elastic sheets are fixedly connected to the sealing plates. Friction blocks are provided at the outer ends of the elastic sheets. The elastic sheets are flexible and abut against the limiting frame through the friction blocks.

9. A soft and friable thin vein filling mining method using the soft and friable thin vein filling device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1: Place the filling frame on the lifting plate inside the moving frame, so that the elastic support at the bottom of the filling frame is pressed against the inside of the limiting frame, connect the grouting pipe to the grouting port at the bottom of the filling frame, and set the rope of the corresponding length on the passive rope reel. S2: By winding and unwinding the rope through the first rope winding mechanism, the moving frame is pulled along the roadway to the side of the area to be filled, so that the lifting plate is aligned with the opening of the area to be filled; S3: Start the second rope winding mechanism, the rope winding drives the lifting mechanism to raise the top plate; the filling frame is lifted and disengaged from the limit frame, the elastic support legs automatically pop out and tighten on the inner wall of the area to be filled; continue to lift until the top plate seals the opening of the area to be filled. S4: Inject filling grout into the grouting port at the bottom of the filling frame through the grouting pipe. The grout flows out from the grout outlet through the internal channel of the filling frame, filling the entire area to be filled, and waiting for solidification. S5: With the assistance of the first rope winding mechanism, the lifting plate is disengaged from the filling frame; then the first rope winding mechanism and the second rope winding mechanism simultaneously wind up the rope to pull the moving frame, the lifting plate and the limiting frame back into the roadway as a whole.

Images