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

Abstract

The invention 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; the situation that gangue is carried or transported manually can be greatly avoided, people only need to walk along with the sliding mechanism and assist in unloading the gangue, the working efficiency is greatly improved, and meanwhile the working intensity is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of gangue transportation in return air roadways, and particularly relates to a system for transporting floor gangue at the floor heave of a return air roadway. Background Art

[0002] In the ventilation system of a coal mine, a return air roadway refers to a roadway specifically used to discharge the polluted air (stale air) underground. It is an important part of the mine ventilation network and together with the intake airway forms a complete ventilation circuit.

[0003] In the complex roadway network of a coal mine mining area, the dedicated return airway plays a crucial core role. Its definition is clear and strict: it is an independent passageway in the mining area roadway system that is specifically designed and only used to guide and discharge the polluted air current (stale air) underground. Its "dedicated nature" is reflected in three core prohibitions:

[0004] It is strictly prohibited to transport materials: It is absolutely forbidden to use it for transporting any materials (such as support materials, equipment parts, etc.) to avoid blocking the roadway, reducing the cross-section, or generating additional dust due to transportation activities, which may damage the ventilation stability.

[0005] It is strictly prohibited to install electrical equipment: It is prohibited to install any electrical equipment (such as switches, cables, monitoring sub-stations, etc.) in it to fundamentally eliminate the risk of gas explosion caused by electrical sparks, especially in areas with gas outbursts.

[0006] It is strictly prohibited for pedestrians to pass through in outburst areas: In areas with the risk of coal (rock) and gas (carbon dioxide) outbursts, it is strictly prohibited for personnel to pass through this roadway. This is because when an outburst occurs, high-concentration gas and shock waves will instantly rush into the return airway, posing a fatal threat to personnel.

[0007] The main reasons for the easy occurrence of floor heave (the floor bulges upward and deforms) in the return airway are its special environment and stress state:

[0008] High humidity softens the rock formation: The polluted air flowing in the return airway has high humidity. Long-term infiltration causes the soft rock formations such as floor mudstone and shale to absorb water and expand, and their strength drops suddenly, losing their bearing capacity.

[0009] Stress concentration and weak support: The return airway usually does not undertake transportation tasks, and the key support is on the roof and sides, and the floor often has no strengthened support. Under the action of high ground pressure, the stress transfers to the un-reinforced floor, causing plastic deformation.

[0010] Long-term weathering and chemical erosion: The humid air flow containing sulfides or acidic gases continuously corrodes the floor rock mass, accelerating the destruction of the rock formation structure.

[0011] Superposition of mining influence: The additional stress transmitted by the mining disturbance of adjacent working faces further exacerbates the instability of the floor.

[0012] After floor heave occurs, floor pulling is required. During the floor pulling process, a large amount of floor gangue will be generated. Since electrical equipment cannot be installed in the return airway, these floor gangues can only be transported downward manually, resulting in a large workload and low efficiency. Summary of the Invention

[0013] The purpose of the present invention is to provide a system for transporting floor gangue at the floor heave of the return airway, so as to solve the problem that the floor gangue at the floor heave of the return airway in the prior art can only be transported downward manually.

[0014] The present invention adopts the following technical solutions: A system for transporting floor gangue at the floor heave of the return airway, where the slope of the return airway is 3 - 15 degrees; the system includes:

[0015] A chain hoist, the first hook of the chain hoist is hooked on the cable anchor of one side wall of the roadway, and the second hook is hooked on the cable anchor of the other side wall of the roadway, so that the chain hoist straddles the entire roadway;

[0016] A steel wire rope, one end of which is fixed to the chain of the chain hoist, and the other end climbs along the return airway and is fixed to the cable anchor of any side wall of the roadway on the slope, so that the steel wire rope climbs upward along the return airway and is suspended in the air in the middle of the roadway;

[0017] A plurality of sliding mechanisms, evenly hung on the steel wire rope, with the floor gangue generated after floor pulling at the floor heave of the return airway suspended at their lower ends. The sliding mechanisms are used to slide from the slope of the return airway to the bottom of the slope along the steel wire rope, so as to transport the floor gangue to the bottom of the slope.

[0018] The beneficial effects of the present invention are:

[0019] The present invention can greatly avoid the situation of manually carrying or transporting gangue. It only requires people to follow the sliding mechanism and assist in unloading the gangue, which greatly improves the work efficiency and reduces the work intensity at the same time;

[0020] The sliding mechanism of the present invention is provided with a start-stop rod. When the sliding mechanism travels too fast due to the gangue, pulling the pulling rope can stop the sliding mechanism, and it is manually controllable, avoiding the sliding mechanism from colliding downward under the drive of the gangue and thus generating danger. Description of the Drawings

[0021] Figure 1 It is a side view of the return airway of the present invention;

[0022] Figure 2 It is a top view of the return airway of the present invention;

[0023] Figure 3 It is a detailed view of the chain hoist of the present invention;

[0024] Figure 4 Front view of the sliding mechanism of the present invention;

[0025] Figure 5 Another schematic structural view of the sliding mechanism of the present invention;

[0026] Figure 6 Rear view of the sliding mechanism of the present invention.

[0027] Wherein: 10, chain block; 11, roadway; 12, steel 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, pulling rope; 22, connecting rod; 23, bin body; 24, fixed pulley. Detailed implementation manners

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. The "direction" in the present invention is described based on the direction of the present invention when it is in the Figure 1 state.

[0030] The present invention discloses a system for transporting floor gangue at the bottom heave of the return airway, as shown in Figure 1 and 2 shown, the slope of the return airway is 3 - 15 degrees.

[0031] The system includes: a chain block 10, a steel wire rope 12, and a plurality of sliding mechanisms 13.

[0032] As shown in Figure 3 shown, the first hook of the chain block 10 is hooked on the anchor cable on one side wall of the roadway 11, and the second hook of the chain block 10 is hooked on the anchor cable on the other side wall of the roadway 11, so that the chain block 10 straddles the entire roadway 11.

[0033] One end of the steel wire rope 12 is fixed to the chain of the manual hoist 10, and the other end of the steel wire rope 12 climbs along the return airway 11 and is fixed to the anchor cable on any side wall of the airway 11 on the slope, so that the steel wire rope 12 climbs upward along the return airway 11 and is suspended in the air of the airway 11.

[0034] A plurality of sliding mechanisms 13 are evenly hung on the steel wire rope 12, and the lower end of the sliding mechanism 13 suspends the floor gangue generated after undercutting from the floor heave of the return airway 11. The sliding mechanism 13 is used to slide along the steel wire rope 12 from the slope of the return airway 11 to the bottom of the slope, so as to transport the floor gangue to the bottom of the slope.

[0035] Preferably, the manual hoist 10 is fixed above the unloading point of the conveyor or belt conveyor, so that the floor gangue can smoothly enter the conveyor or belt conveyor. If the manual hoist 10 cannot be set at the unloading point, a trailer can also be set below the manual hoist 10, and then the gangue is unloaded onto the trailer for easy transportation.

[0036] The two ends of the steel wire rope 12 are respectively the upper end of the slope and the lower end of the slope. The distance between the upper end of the slope of the steel wire rope 12 and the ground of the airway 11 is greater than the distance between the lower end of the slope and the ground of the airway 11, which is convenient for the sliding mechanism 13 to slide under the dead weight of the floor gangue. This situation is applicable when the slope of the return airway 11 is relatively small. At this time, since the steel wire rope 12 will naturally droop, if the distance between the upper end of the slope of the steel wire rope 12 and the ground of the airway 11 is not greater than the distance between the lower end of the slope and the ground of the airway 11, it is easy for the sliding mechanism 13 to slide to the middle position of the steel wire rope 12, and manual assistance or manual towing is required, which not only reduces the sliding speed but also reduces the efficiency.

[0037] As Figures 4 - 6 shown, the sliding mechanism 13 includes: a hanging plate 14, and the hanging plate 14 is in an "n" shape; 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 arranged close to the top plate 16; the lower end of the left side plate 15 bends and extends to the right and is arranged 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, and the gap is used for the steel 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 can slide back and forth on the upper side of the steel wire rope 12.

[0038] When only the hanging plate 14 is provided, the woven bag filled with gangue can be tied to the lower end of the hanging plate 14. If it is considered that tying is time-consuming, a hook can be set below the hanging plate 14, and then the woven bag filled with gangue can be hung on the hook.

[0039] Regarding the setting position of the hanging hook, preferably, it is set at the bent part where the left side plate 15 bends to the right, that is, a hanging hook is fixedly connected at the bent part where the left side plate 15 bends to the right, and the hanging hook is used to hang the bottom coal gangue in bags for transportation.

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

[0041] The baffle 18 is in an "n" shape; the baffle 18 is located at 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 rod 20 is in a "v" shape with an opening facing the downhill direction. A swing hole is provided along the upper half of the start-stop rod 20 for the guide rod 19 to pass through; the lower half of the start-stop rod 20 is arranged close to the fixed pulley 24, and the lower end of the start-stop rod 20 is used to abut against the fixed pulley 24 after being stressed, so as to stop the sliding of the sliding mechanism 13.

[0044] Since the walking speed of the worker is known, once the slope of the return airway 11 is relatively large and the lower end of the sliding mechanism 13 is hung with coal gangue, the speed of the sliding mechanism 13 may exceed the walking speed of the worker. In this case, the worker cannot monitor the sliding of the sliding mechanism 13, which does not meet the production requirements. Because if the sliding mechanism 13 slides too fast, it is easy to collide with the chain block 10 at the downhill or the equipment at other unloading points, and accidents are likely to occur. Therefore, a start-stop rod 20 needs to be provided to interfere with the sliding mechanism 13.

[0045] A pulling rope 21 is connected to the start-stop rod 20 and is used to force the sliding mechanism 13 to stop by pulling. After the start-stop rod 20 is set, by pulling the pulling rope 21 by hand, the lower end of the start-stop rod 20 will abut against the fixed pulley 24 at this time. Also, because a swing hole is provided on the start-stop rod 20 and the guide rod 19 is sleeved in the swing hole, when the start-stop rod 20 is pulled from the lower end, the start-stop rod 20 will rotate clockwise around the guide rod 19. Of course, the rotation amplitude is very small. If it is considered that the start-stop rod 20 will interfere with the fixed pulley 24 when the sliding mechanism 13 does not need to stop, then the traction rope can be gently pulled in the uphill direction when it is not needed 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 pulling rope 21 forward, that is, pull it in the downhill direction.

[0046] For the size of the start-stop lever 20 and whether it interferes with the fixed pulley 24, adjustments can be made according to the actual working conditions to ensure that it does not affect the fixed pulley 24 during normal walking and can press against the fixed pulley 24 when pulling the pulling rope 21.

[0047] A stop block is provided at one end of the steel wire rope 12 close to the chain block 10. The stop block is used to block the sliding mechanism 13 to prevent the chain block 10 from being impacted by the self-weight of the gangue. Although the start-stop lever 20 has been provided, workers may still be negligent sometimes. Therefore, by setting the stop block, a dual protection effect can be achieved.

[0048] The bent part of the left side plate 15 towards the right is connected to a bin body 23 for storing gangue through a connecting rod 22 and a rope. The bin body 23 is used to load gangue on the slope and turn it over and unload the gangue at the transfer point at the bottom of the slope. By setting the bin body 23, rapid unloading can be achieved, that is, when the bin body 23 reaches the unloading point, the bin body 23 can be turned over.

[0049] Embodiment 1

[0050] Due to the influence of mining in the range 100 m forward from the tail of the main intake airway in the 21316 fully mechanized mining face, the floor of the return airway 11 bulges severely. The height of the airway 11 is about 1.6 m, violating the regulation that the height of the airway 11 outside the safety exit shall not be less than 2.0 m in the coal mine safety production standardization management system. Manual bottom pulling is required every shift, and the floor gangue is loaded into woven bags for cleaning, resulting in a large labor intensity.

[0051] Process for preparing the present invention: Prepare 1 steel wire rope 12 with a length of 100 m and a diameter of φ22.5 mm, and 2 steel wire rope 12 locks. Fix the locks at both ends of the steel wire rope 12 respectively, then fix one end of the steel wire rope 12 to the anchor cable on the sidewalk at the tail of the machine, and use the chain block 10 to fix the other end of the steel wire rope 12 to the anchor cable on the sidewalk 100 m forward from the tail of the machine, and hang the sliding mechanism 13 on the steel wire rope 12.

[0052] After installing the present invention, 4 woven bags filled with floor gangue can be hung on the sliding mechanism 13 at the same time, and the sliding mechanism 13 is manually pushed to the tail of the working face and unloaded onto the scraper conveyor.

[0053] In the prior art, 1 person at the end of the machine tail transports 50 bags of floor gangue per shift and walks back and forth 50 times. After using the present invention, 1 person can transport 4 bags of floor gangue at a time, and 50 bags of floor gangue can be cleaned up in 13 times, with the efficiency increased by 4 times; the labor intensity of workers is greatly reduced, potential safety hazards are eliminated in a timely manner, and the production efficiency is greatly improved.

Claims

1. A system for transporting floor gangue at the floor heave of the return airway, characterized in that, The gradient of the return airway (11) is 3 - 15 degrees; the system includes: A chain block (10), the first hook of the chain block (10) is hooked on the cable anchor on one side wall of the roadway (11), and the second hook is hooked on the cable anchor on the other side wall of the roadway (11), so that the chain block (10) spans across the entire roadway (11); A steel wire rope (12), one end of which is fixed to the chain of the chain block (10), and the other end climbs along the return airway (11) and is fixed to the cable anchor on any one side wall of the roadway (11) on the slope, so that the steel wire rope (12) climbs upward along the return airway (11) and is suspended in the air in the roadway (11); A plurality of sliding mechanisms (13), evenly hung on the steel wire rope (12), and the bottom gangue generated after the bottom of the return airway (11) is undercut is suspended at the lower end thereof. The sliding mechanism (13) is used to slide along the steel wire rope (12) from the slope of the return airway (11) to the bottom of the slope, so as to transport the bottom gangue to the bottom of the slope.

2. The system for transporting the floor gangue at the floor heave of the return airway according to claim 1, characterized in that, The chain block (10) is fixed above the unloading point of the transfer machine or the belt conveyor, so that the bottom gangue can smoothly enter the transfer machine or the belt conveyor.

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

4. A system for transporting floor gangue at the floor heave of the return airway according to claim 1, characterized in that, The sliding mechanism (13) includes: A hanging plate (14), in an "n" shape; 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 arranged close to the top plate (16); the lower end of the left side plate (15) bends and extends to the right and is arranged 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), and the gap is used for the steel 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 steel wire rope (12).

5. A system for transporting floor gangue at the floor heave of the return airway according to claim 4, characterized in that, The sliding mechanism (13) further includes: A baffle plate (18), in an "n" shape; located at the top of the hanging plate (14), and its open end is fixedly connected to the upper side of the top plate (16); A guide rod (19), the upper end of which is fixedly connected to the top of the baffle plate (18), and the lower end of which is fixedly connected to the upper side of the top plate (16); A start-stop rod (20), in a "v" shape with the opening facing the downhill direction. A swing hole is formed along its upper half section, and the swing hole is used for the guide rod (19) to pass through; its lower half section is arranged close to the fixed pulley (24), and the lower end of the start-stop rod (20) is used to abut against the fixed pulley (24) after being stressed, so that the sliding mechanism (13) stops sliding.

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

7. A system for transporting floor gangue at the floor heave of the return airway according to claim 1, characterized in that, A stop block is provided at one end of the steel wire rope (12) close to the chain block (10). The stop block is used to block the sliding mechanism (13) to prevent the self-weight of the gangue from impacting the chain block (10).

8. A system for transporting floor gangue at the floor heave of the return airway according to claim 4, characterized in that, A suspension hook is fixedly connected to the rightward bending portion of the left side plate (15). The suspension hook is used to suspend the bagged floor gangue for transportation.

9. A system for transporting floor gangue at the floor heave of the return airway according to claim 4, characterized in that, A storage body (23) for containing gangue is connected to the rightward bending portion of the left side plate (15) through a connecting rod (22) and a rope. The storage body (23) is used to load gangue on the slope and turn it over and unload the gangue at the transfer point at the bottom of the slope.

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