System for transporting floor gangue at floor heave of air return roadway

Abstract

The utility model discloses a system for transporting floor gangue at a floor heave of an air return roadway. The gradient of the air return roadway is 3-15 degrees. The system comprises a chain block, a first hook of the chain block is hooked on an anchor cable on the side wall of one side of a roadway, and a second hook of the chain block is hooked on an anchor cable on the side wall of the other side of the roadway; one end of the steel wire rope is fixed to a chain of the chain block, and the other end of the steel wire rope climbs along the air return roadway and is fixed to an anchor rope on the side wall of any side of the roadway on the slope; the sliding mechanisms are uniformly hung on the steel wire ropes, bottom plate gangues generated after bottom pulling from the bottom heaving position of the air return roadway are hung at the lower ends of the sliding mechanisms, and the sliding mechanisms are used for sliding from the slope of the air return roadway to the slope bottom along the steel wire ropes so as to transport the bottom plate gangues to the slope bottom; according to the utility model, the condition of carrying or transporting the gangue manually can be greatly avoided, and the gangue can be unloaded only by walking along with the sliding mechanism manually, so that the working efficiency is greatly improved, and meanwhile, the working intensity is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of gangue transportation in return air tunnels, and particularly relates to a system for transporting gangue from the floor slab at the bottom of the return air tunnel. Background Technology

[0002] In a coal mine ventilation system, the return air roadway is a roadway specifically designed to exhaust stale air (exhaust air) from underground. It is an important component of the mine ventilation network, forming a complete ventilation loop together with the intake air roadway.

[0003] In the complex network of roadways in coal mining areas, dedicated return airways play a crucial and central role. Their definition is clear and strict: they are independent channels specifically designed and used solely for guiding and discharging contaminated air (exhaust air) from underground within the mining area's roadway system. Their "dedicated" nature is reflected in three core prohibitions:

[0004] Material transport is strictly prohibited: It is absolutely forbidden to use this method to transport any materials (such as support materials, equipment parts, etc.) to avoid roadway blockage, cross-sectional reduction, or additional dust generation caused by transportation activities, which could compromise ventilation stability.

[0005] The installation of electrical equipment is strictly prohibited: It is forbidden to install any electrical equipment (such as switches, cables, monitoring substations, etc.) inside, so as to fundamentally eliminate the risk of gas explosion caused by electrical sparks, especially in the gas outburst area.

[0006] Pedestrian access is strictly prohibited in high-risk areas: Personnel are strictly prohibited from passing through the roadways in areas prone to coal (rock) and gas (carbon dioxide) outbursts. This is because, in the event of an outburst, high concentrations of gas and shock waves will instantly flood the return airway, posing a fatal threat to personnel.

[0007] The main reason why return airways are prone to floor heave (upward bulging and deformation of the floor plate) lies in their special environment and stress state:

[0008] High humidity softens rock strata: The polluted air circulating in the return airway has high humidity. Long-term infiltration causes the weak rock strata such as mudstone and shale on the bottom to absorb water, expand, and suddenly lose their strength, thus losing their bearing capacity.

[0009] Stress concentration and weak support: Return airways typically do not handle transportation, so the support focuses on the roof and side walls, while the floor often lacks reinforced support. Under high ground pressure, stress transfers to the unreinforced floor, inducing plastic deformation.

[0010] Long-term weathering and chemical erosion: Moist air currents containing sulfides or acidic gases continuously corrode the underlying rock mass, accelerating the destruction of the rock structure.

[0011] The superimposed effects of mining: The additional stress transmitted by the mining disturbance in the adjacent working face further exacerbates the instability of the floor.

[0012] After a floor heave occurs, floor haulage is required. During this process, a large amount of floor gangue is generated. Since electrical equipment cannot be installed in the return airway, the floor gangue must be transported downwards manually, resulting in a large workload and low efficiency. Summary of the Invention

[0013] The purpose of this invention is to provide a system for transporting bottom slab gangue at the bottom heave of the return air roadway, so as to solve the problem that in the prior art, the bottom slab gangue at the bottom heave of the return air roadway can only be transported downwards manually.

[0014] This utility model adopts the following technical solution: a system for transporting bottom slab gangue at the bottom heave of a return airway, wherein the slope of the return airway is 3-15 degrees; the system includes:

[0015] The first hook of the hand chain hoist is hooked onto the anchor cable on one side wall of the return air tunnel, and the second hook is hooked onto the anchor cable on the other side wall of the return air tunnel, thus allowing the hand chain hoist to span the entire return air tunnel.

[0016] One end of the wire rope is fixed to the chain of the hand-operated hoist, and the other end climbs up the slope of the return air roadway and is fixed to the anchor cable on either side wall of the return air roadway on the slope, so that the wire rope climbs up the slope of the return air roadway and is suspended in the air in the return air roadway.

[0017] Multiple sliding mechanisms are evenly suspended on the wire rope, with the bottom plate gangue generated after being pulled from the bottom of the return air roadway suspended at its lower end. The sliding mechanism is used to slide along the wire rope from the top of the slope of the return air roadway to the bottom of the slope, thereby transporting the bottom plate gangue to the bottom of the slope.

[0018] The beneficial effects of this utility model are:

[0019] This invention can greatly reduce the need for manual carrying or transporting of gangue. It only requires people to walk along the sliding mechanism and assist in unloading the gangue, which greatly improves work efficiency and reduces work intensity.

[0020] The sliding mechanism of this utility model is equipped with a start / stop lever. When the sliding mechanism moves too fast due to the gangue, pulling the traction rope can stop the sliding mechanism. This is also manually controllable, preventing the sliding mechanism from crashing downwards under the influence of the gangue and causing danger. Attached Figure Description

[0021] Figure 1 This is a side view of the return air tunnel of this utility model;

[0022] Figure 2 This is a top view of the return air tunnel of this utility model;

[0023] Figure 3Here are detailed drawings of the hand chain hoist of this utility model;

[0024] Figure 4 This is a front view of the sliding mechanism of this utility model;

[0025] Figure 5 This is another structural schematic diagram of the sliding mechanism of this utility model;

[0026] Figure 6 This is a rear view of the sliding mechanism of this utility model.

[0027] Among them: 10. Hand-operated hoist; 11. Return airway; 12. Wire rope; 13. Sliding mechanism; 14. Hanging plate; 15. Left side plate; 16. Top plate; 17. Right side plate; 18. Baffle; 19. Guide rod; 20. Start / stop rod; 21. Pull rope; 22. Connecting rod; 23. Chamber body; 24. Fixed pulley. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0030] This utility model discloses a system for transporting bottom slab gangue at the bottom heave of a return airway, such as... Figure 1 and 2 As shown, the slope of the return airway is 3-15 degrees.

[0031] The system includes: a hand chain hoist 10, a wire rope 12, and multiple sliding mechanisms 13.

[0032] like Figure 3As shown, the first hook of the hand chain hoist 10 is hooked on the anchor cable on one side wall of the return air tunnel 11, and the second hook of the hand chain hoist 10 is hooked on the anchor cable on the other side wall of the return air tunnel 11, so that the hand chain hoist 10 spans the entire return air tunnel 11.

[0033] One end of the wire rope 12 is fixed to the chain of the hand-operated hoist 10, and the other end of the wire rope 12 climbs up the slope of the return air roadway 11 and is fixed to the anchor cable on either side wall of the return air roadway 11 on the slope, thereby making the wire rope 12 climb up the slope of the return air roadway 11 and be suspended in the air in the return air roadway 11.

[0034] Multiple sliding mechanisms 13 are evenly hung on the wire rope 12. The lower end of the sliding mechanism 13 is suspended with bottom plate gangue generated after being pulled from the bottom drum of the return air roadway 11. The sliding mechanism 13 is used to slide along the wire rope 12 from the top of the slope of the return air roadway 11 to the bottom of the slope, thereby transporting the bottom plate gangue to the bottom of the slope.

[0035] Preferably, the hand chain hoist 10 is fixed above the unloading point of the transfer machine or belt conveyor, so that the bottom plate gangue can smoothly enter the transfer machine or belt conveyor. If it is not possible to set the hand chain hoist 10 at the unloading point, a trailer can be set below the hand chain hoist 10 to unload the gangue onto the trailer for easy transportation.

[0036] The two ends of the wire rope 12 are the upper end and the lower end of the slope, respectively. The distance between the upper end of the wire rope 12 and the ground of the return air tunnel 11 is greater than the distance between the lower end of the wire rope 12 and the ground of the return air tunnel 11, which facilitates the sliding mechanism 13 to slide under the weight of the bottom gangue. This situation is suitable when the slope of the return air tunnel 11 is small. In this case, since the wire rope 12 will hang down naturally, if the distance between the upper end of the wire rope 12 and the ground of the return air tunnel 11 is not greater than the distance between the lower end of the wire rope 12 and the ground of the return air tunnel 11, it is easy for the sliding mechanism 13 to slide to the middle position of the wire rope 12, requiring manual assistance or dragging, which reduces the sliding speed and efficiency.

[0037] like Figure 4-6 As shown, the sliding mechanism 13 includes: a hanging plate 14, which is "n"-shaped; the hanging plate 14 is integrally connected by a left side plate 15, a top plate 16, and a right side plate 17. A fixed pulley 24 is installed between the left side plate 15 and the right side plate 17, and the fixed pulley 24 is located near the top plate 16; the lower end of the left side plate 15 bends to the right and extends, and is located near the lower end of the right side plate 17. A gap is formed between the left side plate 15 and the right side plate 17, and the gap is used for the wire rope 12 to enter the cavity formed by the left side plate 15 and the right side plate 17, so that the fixed pulley 24 slides back and forth on the upper side of the wire rope 12.

[0038] When only the hanging plate 14 is installed, the woven bags containing gangue can be tied to the lower end of the hanging plate 14. If tying is considered time-consuming, hooks can be installed at the bottom of the hanging plate 14, and then the woven bags containing gangue can be hung on the hooks.

[0039] Preferably, the hook is located at the right bend of the left side plate 15, where a suspension hook is fixedly connected. The suspension hook is used to suspend the bagged bottom plate gangue for transportation.

[0040] The sliding mechanism 13 also includes: a baffle 18, a guide rod 19, and a start / stop rod 20.

[0041] The baffle 18 is "n" shaped; the baffle 18 is located on the top of the hanging plate 14, and the open end of the baffle 18 is fixedly connected to the upper side of the top plate 16.

[0042] The upper end of the guide rod 19 is fixedly connected to the top of the baffle 18, and the lower end of the guide rod 19 is fixedly connected to the upper side of the top plate 16.

[0043] The start / stop lever 20 is a "V"-shaped structure with its opening facing downhill. The upper half of the start / stop lever 20 has a swing hole along its direction, which is used to guide the rod 19 through. The lower half of the start / stop lever 20 is located close to the fixed pulley 24. The lower end of the start / stop lever 20 is used to abut against the fixed pulley 24 after being subjected to force, thereby stopping the sliding mechanism 13 from sliding.

[0044] Since the worker's walking speed is known, if the slope of the return airway 11 is large and there is gangue hanging at the lower end of the sliding mechanism 13, the speed of the sliding mechanism 13 may exceed the worker's walking speed. In this case, the worker will not be able to supervise the sliding mechanism 13's movement, which does not meet production requirements. If the sliding mechanism 13 moves too fast, it may collide with the hand chain hoist 10 or other unloading equipment at the downhill end, which could easily lead to an accident. Therefore, a start / stop lever 20 is needed to interfere with the sliding mechanism 13.

[0045] The start / stop lever 20 is connected to a pull rope 21, which is used to force the sliding mechanism 13 to stop by pulling. After the start / stop lever 20 is set, the lower end of the start / stop lever 20 will abut against the fixed pulley 24 when the pull rope 21 is pulled by hand. Since the start / stop lever 20 has a swing hole, and a guide rod 19 is fitted inside the swing hole, when the start / stop lever 20 is pulled from the lower end, the start / stop lever 20 will rotate clockwise around the guide rod 19. Of course, the amplitude of the rotation is very small. If it is believed that the start / stop lever 20 will interfere with the fixed pulley 24 when the sliding mechanism 13 does not need to stop, then the pull rope can be gently pulled in the uphill direction when it does not need to stop, that is, the worker walks behind the sliding mechanism 13. When it is necessary to stop the sliding mechanism 13, just take two more steps forward and pull the pull rope 21 forward, that is, in the downhill direction.

[0046] The size of the start / stop lever 20 and whether it interferes with the fixed pulley 24 can be adjusted according to the actual working conditions, so that it does not affect the fixed pulley 24 when walking normally, and it abuts against the fixed pulley 24 when pulling the traction rope 21.

[0047] A stop block is provided at one end of the wire rope 12 near the hand chain hoist 10. The stop block is used to block the sliding mechanism 13 and prevent the hand chain hoist 10 from being impacted by the weight of the gangue. Although a start / stop lever 20 is already provided, workers will inevitably be negligent at times. Therefore, by setting up the stop block, a double protection function can be achieved.

[0048] The left side plate 15, bent to the right, is connected to a bin 23 for holding gangue via a connecting rod 22 and a rope. The bin 23 is used to load gangue onto the slope and to unload it by flipping it over when it reaches the transfer point at the bottom of the slope. By setting up the bin 23, rapid unloading can be achieved; that is, the bin 23 can be flipped over when it reaches the unloading point. Example

[0049] Due to mining-induced disturbances within 100m forward of the main intake airway tail of the 21316 longwall mining face, severe floor heave occurred in return airway 11. The height of return airway 11 is approximately 1.6m, violating the coal mine safety production standardization management system regulation that the height of return airway 11 outside the safety exit should not be less than 2.0m. Manual floor cleaning is required every shift, with the bottom rock being packed into woven bags for removal, resulting in high labor intensity.

[0050] The process of preparing this utility model is as follows: Prepare a 100m long φ22.5mm steel wire rope 12 and two steel wire rope 12 locks. Fix the locks to both ends of the steel wire rope 12 respectively. Then fix one end of the steel wire rope 12 to the sidewalk anchor cable at the tail of the machine, and use a hand chain hoist 10 to fix the other end of the steel wire rope 12 to the sidewalk anchor cable 100m away from the tail of the machine. Then hang the sliding mechanism 13 on the steel wire rope 12.

[0051] After installing this utility model, four woven bags containing bottom plate gangue can be hung on the sliding mechanism 13 at the same time, and the sliding mechanism 13 can be manually pushed to the tail of the working face to unload onto the scraper conveyor.

[0052] In existing technology, one worker at the tail end of the machine must move 50 bags of bottom plate gangue per shift, making 50 round trips. After using this utility model, one person can move 4 bags of bottom plate gangue per trip, and all 50 bags can be cleaned in 13 trips, increasing efficiency by 4 times; it greatly reduces the labor intensity of workers, eliminates safety hazards in a timely manner, and greatly improves production efficiency.

Claims

1. A system for transporting bottom waste rock at the floor heave of a return airway, characterized in that, The slope of the return airway (11) is 3-15 degrees; the system includes: The hand chain hoist (10) has its first hook hooked on the anchor cable on one side wall of the return airway (11) and its second hook hooked on the anchor cable on the other side wall of the return airway (11), thereby making the hand chain hoist (10) span the entire return airway (11). The wire rope (12) is fixed at one end to the chain of the hand-operated hoist (10), and at the other end it climbs up the slope of the return air roadway (11) and is fixed on the anchor cable on any side wall of the return air roadway (11) on the slope, so that the wire rope (12) climbs up the slope of the return air roadway (11) and is suspended in the air of the return air roadway (11); Multiple sliding mechanisms (13) are evenly hung on the wire rope (12), with bottom plate gangue generated after being pulled from the bottom of the return air roadway (11) at its lower end. The sliding mechanism (13) is used to slide along the wire rope (12) from the top of the slope of the return air roadway (11) to the bottom of the slope, thereby transporting the bottom plate gangue to the bottom of the slope.

2. The system for transporting bottom slab gangue at the bottom heave of a return airway according to claim 1, characterized in that, The hand chain hoist (10) is fixed on the upper side of the unloading point of the transfer machine or belt conveyor, so that the bottom plate gangue can smoothly enter the transfer machine or belt conveyor.

3. A system for transporting bottom slab gangue at the floor heave of a return airway according to claim 1, characterized in that, The two ends of the wire rope (12) are the upper end of the slope and the lower end of the slope, respectively. The distance between the upper end of the wire rope (12) and the ground of the return air roadway (11) is greater than the distance between the lower end of the slope and the ground of the return air roadway (11), which facilitates the sliding mechanism (13) to slide under the weight of the bottom plate gangue.

4. A system for transporting bottom slab gangue at the floor heave of a return airway according to claim 1, characterized in that, The sliding mechanism (13) includes: The hanging plate (14) is "n" shaped; it is composed of a left side plate (15), a top plate (16) and a right side plate (17) connected together. A fixed pulley (24) is installed between the left side plate (15) and the right side plate (17). The fixed pulley (24) is set close to the top plate (16). The lower end of the left side plate (15) bends to the right and extends, and is set close to the lower end of the right side plate (17). A gap is formed between the left side plate (15) and the right side plate (17). The gap is used for the wire rope (12) to enter the cavity formed by the left side plate (15) and the right side plate (17), so that the fixed pulley (24) slides back and forth on the upper side of the wire rope (12).

5. A system for transporting bottom slab gangue at the floor heave of a return airway according to claim 4, characterized in that, The sliding mechanism (13) further includes: The baffle (18) is "n" shaped and is located at the top of the hanging plate (14), with its open end fixedly connected to the upper side of the top plate (16). The guide rod (19) has its upper end fixedly connected to the top of the baffle (18) and its lower end fixedly connected to the upper side of the top plate (16). The start / stop lever (20) is a "V"-shaped structure with its opening facing downhill. The upper half of the lever has a swing hole along its direction, which is used to guide the rod (19) to pass through. The lower half of the lever is located near the fixed pulley (24). The lower end of the start / stop lever (20) is used to abut against the fixed pulley (24) after being subjected to force, thereby stopping the sliding mechanism (13) from sliding.

6. A system for transporting bottom slab gangue at the floor heave of a return airway according to claim 5, characterized in that, The start / stop lever (20) is connected to a pull rope (21) and is used to force the sliding mechanism (13) to stop by pulling.

7. A system for transporting bottom slab gangue at the floor heave of a return airway according to claim 1, characterized in that, The wire rope (12) is provided with a stop block at one end near the hand chain hoist (10). The stop block is used to block the sliding mechanism (13) to prevent the gangue from impacting the hand chain hoist (10) due to its own weight.

8. A system for transporting bottom slab gangue at the floor heave of a return airway according to claim 4, characterized in that, The left side plate (15) is fixedly connected to a hook at the right bend, which is used to suspend the bagged bottom plate gangue for transportation.

9. A system for transporting bottom slab gangue at the bottom heave of a return airway according to claim 4, characterized in that, The left side plate (15) is connected to a bin (23) for holding gangue by a connecting rod (22) and a rope at the right bend. The bin (23) is used to load gangue on the slope and flip it over to unload the gangue when it is at the transfer point at the bottom of the slope.

Images