Coal rock time-sharing and conveying flexible gangue discharge system and method

Abstract

The application discloses a coal rock time-sharing and time-sharing flexible gangue discharging system and method, and relates to the technical field of mine roadway engineering. The system comprises a system roadway, a gas comprehensive roadway, a main transportation roadway, a gangue transportation roadway, a vertical gangue storage bin, a first gangue discharging hole, a second gangue discharging hole and a connecting roadway. The gangue transportation roadway is communicated with the main transportation roadway through the vertical gangue storage bin. The gas comprehensive roadway is communicated with the gangue transportation roadway through the first gangue discharging hole. The system roadway is communicated with the main transportation roadway in the same layer, communicated with the main transportation roadway through the second gangue discharging hole or communicated with the gangue transportation roadway through the connecting roadway. A conveying system is arranged in the system roadway, the gas comprehensive roadway, the main transportation roadway, the gangue transportation roadway and the connecting roadway. A horizontal gangue storage bin is further arranged in the system roadway. The application has the advantages that continuous and efficient transportation of the rock roadway gangue discharging system is realized, and the gangue discharging efficiency of rock roadway excavation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine roadway engineering, and particularly relates to a coal and rock time-sharing and separate conveying flexible gangue discharge system and method. BACKGROUND

[0002] Rock roadway engineering is an indispensable system engineering in underground coal mining, and its driving efficiency restricts the stope replacement and efficient production of the mine. Meanwhile, due to the need of gas control, the rock roadway engineering quantity in the internal mining area is gradually increasing. At present, the main methods of rock roadway driving include drilling and blasting method (blasting driving) and comprehensive mechanized driving (fully-mechanized driving). The fully-mechanized driving construction is greatly affected by the rock hardness and the cross section size of the roadway, and its applicable range is limited. The blasting driving has strong adaptability to the rock hardness and the cross section size of the roadway, and is convenient and flexible to operate, so its applicable range is wide.

[0003] During the preparation of the mining area, the system roadway needs to be driven first, and then the regular transportation, ventilation, power supply, drainage and other systems are formed, and then the mining roadway such as the gas control roadway and the working face crossheading can be driven. The system roadway is arranged in the stable rock stratum with good lithology due to its long service time, and the blasting driving construction method is usually adopted. The gas control roadway is usually constructed in the appropriate horizon, and the fully-mechanized driving construction method is usually adopted. The gangue discharge of the blasting driving usually adopts the mode of the gangue scraper + belt conveyor + mine car. This mode is discontinuous in gangue discharge, has low efficiency, and the gangue discharge and the head gangue discharge cannot be operated in parallel. Moreover, the gangue discharge is limited by the number of mine cars. Once the supply of mine cars is insufficient, the head gangue discharge cannot be carried out, and then the construction of the next cycle operation is limited, which seriously restricts the construction efficiency of the rock roadway. The gangue discharge of the fully-mechanized driving usually adopts the mode of the fully-mechanized driving machine + belt conveyor. The gangue enters the main transportation system along with the belt conveyor, and the continuous gangue discharge is realized. However, the coal quality is seriously affected after the gangue enters the coal flow.

[0004] At present, most of the production mines only have the coal flow main transportation roadway, and do not have the independent gangue flow main transportation roadway. If the special gangue main transportation roadway is excavated, a large amount of manpower and material resources will be consumed, and a long time is needed, so the problem cannot be solved in a short time. Therefore, for the gangue transportation, the main transportation roadway is usually used for separate packaging and transportation, that is, the gangue flow transportation is prohibited during the coal flow transportation. In this way, the gangue discharge is limited again.

[0005] The patent document with the publication number CN109083678A discloses a return air stone door coal and gangue separate transportation system, which comprises a return air stone door and a concentrated transportation roadway. A return air and gangue discharge connecting roadway is arranged between the return air stone door and the concentrated transportation roadway. The gangue is transported to the concentrated transportation roadway through the return air and gangue discharge connecting roadway during the gangue discharge, and the gangue enters the coal bin of the concentrated transportation roadway. When the coal is uncovered and discharged, the gangue enters the gangue bin of the return air stone door. The existing separate transportation system utilizes the original system roadway, and the gangue enters different system roadways during the gangue discharge and the coal discharge to realize the coal and gangue separate transportation. The continuous and efficient gangue discharge of the system roadway in the early stage cannot be realized. SUMMARY

[0006] The technical problem to be solved by the present application is how to construct an efficient gangue discharge mode to realize continuous and efficient discharge of gangue in the early stage system roadway and meet the discharge requirements of the later stage rock roadway excavation in the mining area.

[0007] The present application solves the above technical problems by the following technical means: a coal-rock time-sharing and separate transport flexible gangue discharge system, comprising a system roadway, a gas comprehensive roadway, a main transport roadway, a gangue transport roadway, a vertical gangue storage bin, a first gangue chute, a second gangue chute and a connecting roadway.

[0008] The gangue transport roadway is connected to the main transport roadway through the vertical gangue storage bin, and the lower end of the gangue discharge outlet of the vertical gangue storage bin is located directly above the conveying system in the main transport roadway and is provided with an openable or closable gangue discharge gate.

[0009] The gas comprehensive roadway is connected to the gangue transport roadway through the first gangue chute, and the lower end of the gangue discharge outlet of the first gangue chute is located directly above the conveying system in the gangue transport roadway and is provided with an openable or closable gangue discharge gate.

[0010] The system roadway is connected to the main transport roadway in the same layer, connected to the main transport roadway through the second gangue chute or connected to the gangue transport roadway through the connecting roadway, and the lower end of the gangue discharge outlet of the second gangue chute is located directly above the conveying system in the main transport roadway and is provided with an openable or closable gangue discharge gate.

[0011] Conveying systems are provided in the system roadway, the gas comprehensive roadway, the main transport roadway, the gangue transport roadway and the connecting roadway, and a horizontal gangue storage bin is further provided in the system roadway.

[0012] The present application sets up a special gangue transport roadway and a vertical gangue storage bin to realize the buffering function, so that the gangue generated by the early stage system roadway excavation and the gangue generated by the later stage rock roadway excavation in the mining area can be discharged to the main transport roadway through the gangue transport roadway in time, realizing continuous and efficient transport of the rock roadway gangue discharge system, improving the gangue discharge efficiency of the rock roadway excavation, meeting the parallel operation construction of the rock roadway multi-face, accommodating a large amount of gangue flow, realizing separate packaging and transport of the gangue flow and the coal flow, greatly improving the preparation efficiency of the mining area and the construction efficiency of the rock roadway, and being simple and easy to operate.

[0013] The first gangue chute is opened when discharging gangue and used as a temporary gangue storage bin when not discharging gangue, realizing time buffering of gangue discharge; the conveying system in the gas comprehensive roadway together with the first gangue chute constitutes the first level flexible gangue discharge system of the gas comprehensive roadway, and further combined with the conveying system in the gangue transport roadway and the vertical gangue storage bin constitutes the second level flexible gangue discharge system, forming multi-level buffering of the gangue discharge in the mining area.

[0014] The conveying system in the system roadway connected with the main transportation roadway together with the horizontal type storage gangue bin constitutes a first flexible gangue discharge system; the conveying system in the system roadway connected with the main transportation roadway through the second gangue sliding hole together with the horizontal type storage gangue bin constitutes a first flexible gangue discharge system, and the second gangue sliding hole constitutes a second flexible gangue discharge system; the conveying system in the system roadway connected with the main transportation roadway through the connecting roadway together with the horizontal type storage gangue bin constitutes a first flexible gangue discharge system, and the conveying system in the connecting roadway, the conveying system in the gangue transportation roadway and the vertical type storage gangue bin constitute a second flexible gangue discharge system; and a multi-stage buffer for gangue discharge in the mining area is formed.

[0015] As an optimized technical scheme, the conveying system in the system roadway comprises a first gangue scraper, a first buffer hopper, a first belt conveyor and a second gangue scraper; the first gangue scraper is arranged at the head of the roadway, the first buffer hopper is connected between the discharge chute of the first gangue scraper and the feeding end of the first belt conveyor; the feeding port of the horizontal type storage gangue bin is connected to the discharge end of the first belt conveyor, and the second gangue scraper is arranged at the discharge end of the horizontal type storage gangue bin. The first buffer hopper can reduce the impact damage of hard gangue on the first belt conveyor, reduce the equipment failure rate, and also play a role in guiding flow and dust reduction.

[0016] As an optimized technical scheme, the outer periphery of the middle groove of the first gangue scraper and the second gangue scraper is provided with a gangue protection net; the gangue protection net comprises a steel mesh and an anchor cable steel strand, the steel mesh is fixedly connected to the anchor cable steel strand, the upper end of the anchor cable steel strand is anchored in the drill hole of the roof of the roadway, and the lower end is fixedly connected to the middle groove through a lock. Avoiding the gangue from bouncing out and hurting people during the discharging process.

[0017] As an optimized technical scheme, the horizontal type storage gangue bin comprises a stand, a side plate, a tray and an anchor rod; a plurality of stands enclose the outer contour of the horizontal type storage gangue bin, the lower end of the stand is fixedly connected to the floor of the roadway; the side plate is fixedly connected to the stand to form the closed side wall of the horizontal type storage gangue bin; a plurality of through holes are arranged around the middle position on the tray, and the tray is fixedly connected to the upper end of the stand; a plurality of anchor rods are arranged around the outer periphery of the stand, the anchor rods pass through the through holes on the tray and are anchored in the drill hole of the roof of the roadway. The structure is firm and convenient to disassemble and assemble.

[0018] As the optimized technical scheme, the conveying system in the connecting roadway comprises a second belt conveyor and a second buffer hopper; the floor of the connecting roadway is higher than the floor of the gangue transportation roadway, the connecting roadway is connected to the roof of the gangue transportation roadway to expand the roof brushing; the second belt conveyor extends from the entrance end to the exit end of the connecting roadway, and the second buffer hopper is connected between the discharge end of the second belt conveyor and the feeding end of the conveying system in the gangue transportation roadway. The second buffer hopper can reduce the damage degree of the hard gangue to the conveying system in the gangue transportation roadway, reduce the equipment failure rate, and also play a role in flow guiding and dust reduction.

[0019] As the optimized technical scheme, the vertical gangue storage bin comprises an upper lock, a bin barrel and a lower lock, which are sequentially connected from top to bottom, the upper lock is fixedly connected to the floor of the gangue transportation roadway, and the lower lock is in the form of a funnel structure with a gradually reduced cross section from top to bottom. Temporary storage of gangue can be realized, and the structure is convenient for gangue discharge.

[0020] As the optimized technical scheme, the vertical gangue storage bin further comprises an anchor net spray supporting structure and a reinforced concrete supporting structure; the outer periphery of the bin barrel is provided with the anchor net spray supporting structure; and the outer periphery of the lower lock is sequentially provided with the anchor net spray supporting structure and the reinforced concrete supporting structure from inside to outside, forming a double supporting structure. The service life of the vertical gangue storage bin can be increased.

[0021] As the optimized technical scheme, the construction steps of the coal and rock time-sharing and separate conveying flexible gangue discharge system are as follows:

[0022] First step, construction of system roadway, gas comprehensive roadway, main transportation roadway, gangue transportation roadway and second gangue sliding hole;

[0023] Second step, construction of vertical gangue storage bin and arrangement of conveying system in the main transportation roadway and the gangue transportation roadway;

[0024] Third step, construction of horizontal gangue storage bin in the system roadway and arrangement of conveying system;

[0025] Fourth step, construction of connecting roadway and arrangement of conveying system in the connecting roadway;

[0026] Fifth step, construction of first gangue sliding hole and arrangement of conveying system in the gas comprehensive roadway.

[0027] As the optimized technical scheme, in the system roadway connected to the main transportation roadway on the same layer, the horizontal gangue storage bin is arranged at the roadway door opening; in the system roadway connected to the main transportation roadway through the second gangue sliding hole, the horizontal gangue storage bin is arranged near the upper end gangue inlet of the second gangue sliding hole; in the system roadway connected to the gangue transportation roadway through the connecting roadway, the horizontal gangue storage bin is arranged at the roadway door opening during the early construction, and then the horizontal gangue storage bin is moved to the vicinity of the entrance end of the connecting roadway after the system roadway is connected to the gangue transportation roadway through the connecting roadway.

[0028] A flexible gangue discharging method for coal and rock is provided, and the method comprises the following steps: gangue generated by gas comprehensive roadway excavation is discharged into a gangue transportation roadway through a first gangue discharging hole; gangue generated by system roadway excavation connected with the gangue transportation roadway is discharged into the gangue transportation roadway through a connecting roadway; during coal flow transportation in the main transportation roadway, the gangue discharging gate of the vertical gangue storage bin is closed, and the gangue transported through the gangue transportation roadway is temporarily stored in the vertical gangue storage bin; gangue generated by system roadway excavation connected with the main transportation roadway through a second gangue discharging hole is temporarily stored in the second gangue discharging hole, and gangue generated by system roadway excavation connected with the main transportation roadway in the same layer is temporarily stored in the horizontal gangue storage bin; after the coal flow transportation in the main transportation roadway is completed, the gangue discharging gate of the vertical gangue storage bin is opened, and the gangue stored in the horizontal gangue storage bin in the system roadway connected with the main transportation roadway in the same layer is transported to the conveying system of the main transportation roadway, and the gangue flow is transported through the main transportation roadway.

[0029] The present application has the following advantages:

[0030] 1. The gangue transportation roadway and the vertical gangue storage bin are provided to realize the buffering function, so that the gangue generated by the system roadway excavation in the early stage and the gangue generated by the rock roadway excavation in the later stage can be discharged to the main transportation roadway through the gangue transportation roadway, the continuous and efficient transportation of the rock roadway gangue discharging system is realized, the gangue discharging efficiency of the rock roadway excavation is improved, the parallel operation of the rock roadway multi-face can be met, the gangue flow can be accommodated, the gangue flow and the coal flow can be separately transported, the preparation efficiency of the mining area and the construction efficiency of the rock roadway are greatly improved, and the method is simple and easy to operate.

[0031] 2. The first gangue discharging hole is opened when discharging gangue and is used as a temporary gangue storage bin when not discharging gangue, so that the time buffer of the gangue discharging is realized; the conveying system in the gas comprehensive roadway and the first gangue discharging hole constitute the first level flexible gangue discharging system of the gas comprehensive roadway, and the conveying system in the gangue transportation roadway and the vertical gangue storage bin constitute the second level flexible gangue discharging system, so that the multi-level buffer of the gangue discharging in the mining area is formed.

[0032] 3. The conveying system in the system roadway connected with the main transportation roadway in the same layer and the horizontal gangue storage bin constitute the first level flexible gangue discharging system; the second gangue discharging hole is opened when discharging gangue and is used as a temporary gangue storage bin when not discharging gangue, so that the time buffer of the gangue discharging is realized; the conveying system in the system roadway connected with the main transportation roadway through the second gangue discharging hole and the horizontal gangue storage bin constitute the first level flexible gangue discharging system, and the second gangue discharging hole constitutes the second level flexible gangue discharging system; the conveying system in the system roadway connected with the main transportation roadway through the connecting roadway and the horizontal gangue storage bin constitute the first level flexible gangue discharging system, and the conveying system in the connecting roadway, the conveying system in the gangue transportation roadway and the vertical gangue storage bin constitute the second level flexible gangue discharging system; so that the multi-level buffer of the gangue discharging in the mining area is formed. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of a coal and rock time-sharing and flexible transporting flexible gangue discharging system of an embodiment of the present application.

[0034] Figure 2 is a structural schematic view of a conveying system in a belt conveyor roadway and a horizontal gangue storage bin of an embodiment of the present application.

[0035] Figure 3 is a structural schematic view of a connecting roadway conveying system of an embodiment of the present application.

[0036] Figure 4 is a vertical sectional view of a vertical gangue storage bin of an embodiment of the present application.

[0037] Figure 5 is a horizontal sectional view of a reinforced concrete support structure of an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] As shown in Figures 1 to 3 , the present application discloses a coal and rock time-sharing and flexible transporting flexible gangue discharging system, which comprises a system roadway, a gas comprehensive roadway 5, a main transportation roadway 6, a gangue transportation roadway 7, a vertical gangue storage bin 8, a first gangue sliding hole 9, a second gangue sliding hole 10, a connecting roadway 11, a first gangue scraper 12, a first buffer hopper 13, a first belt conveyor 14, a horizontal gangue storage bin 15, a second gangue scraper 16, a second belt conveyor 19, a second buffer hopper 20, Figure 3 a mine car track 17 and a mine car 18 in the above are devices adopted by the existing method, and the embodiments of the present application are replaced by a belt conveyor and a buffer hopper.

[0040] In the embodiments, the system roadway comprises a mining area east return air roadway 1, a mining area track roadway 2, a mining area belt conveyor roadway 3 and a mining area west return air roadway 4, and the system roadway is designed in a hard rock layer as far as possible, which is convenient for later roadway maintenance, and the system roadway adopts a blasting excavation construction method; the mining area east return air roadway 1 and the mining area west return air roadway 4 are each provided with a plurality of gas comprehensive roadways 5 communicated therewith, and the gas comprehensive roadways 5 adopt a fully-mechanized excavation construction method; the coal flow of the mining area and the gangue flow of the mining area east return air roadway 1, the mining area track roadway 2, the mining area belt conveyor roadway 3, the mining area west return air roadway 4 and the gas comprehensive roadway 5 are all transported through the main transportation roadway 6.

[0041] In order to realize continuous and efficient gangue discharge, when designing the mining area, the horizon, construction method, system construction mode and the like are considered comprehensively, a regular gangue discharge system of the mining area is planned from the source, the gangue transportation roadway 7 and the vertical gangue storage bin 8 are arranged; the gangue transportation roadway 7 extends to the upside of the main transportation roadway 6 and is connected with the main transportation roadway 6 through the vertical gangue storage bin 8, the lower end of the gangue discharge outlet of the vertical gangue storage bin 8 is located directly above the conveying system in the main transportation roadway 6 and is provided with an openable or closable gangue discharge gate, and the opening or closing of the gangue discharge gate is realized through a hydraulic jack.

[0042] Each gas comprehensive roadway 5 extends to the upside of the gangue transportation roadway 7 and is connected with the gangue transportation roadway 7 through the first gangue sliding hole 9, and when the horizon of the gangue transportation roadway 7 is selected, the gangue storage capacity of the vertical gangue storage bin 8 and the gangue storage capacity of the first gangue sliding hole 9 are considered; the lower end of the gangue discharge outlet of the first gangue sliding hole 9 is located directly above the conveying system in the gangue transportation roadway 7 and is provided with an openable or closable gangue discharge gate, which is opened during gangue discharge and is used as a temporary gangue storage bin during no gangue discharge, thereby realizing time buffer of gangue discharge.

[0043] In the system roadway, the mining area belt conveyor roadway 3 is connected with the main transportation roadway 6 in the same horizon, and the existing method transports the gangue to the main transportation roadway 6 through the mine car 18 which travels along the mine car track 17; the mining area east air return roadway 1 extends to the upside of the main transportation roadway 3 and has a suitable horizon, and can be connected with the main transportation roadway 6 through the second gangue sliding hole 10, the lower end of the gangue discharge outlet of the second gangue sliding hole 10 is located directly above the conveying system in the main transportation roadway 6 and is provided with an openable or closable gangue discharge gate, which is opened during gangue discharge and is used as a temporary gangue storage bin during no gangue discharge, thereby realizing time buffer of gangue discharge; the mining area track roadway 2 and the mining area west air return roadway 4 cannot directly construct a continuous gangue discharge system with the main transportation roadway 6, therefore, the mining area track roadway 2 and the mining area west air return roadway 4 discharge gangue through other transportation roadways connected therewith during the early construction, and when the mining area track roadway 2 and the mining area west air return roadway 4 are constructed to a suitable position, the connecting roadways 11 are respectively constructed, and the mining area track roadway 2 and the mining area west air return roadway 4 are connected with the gangue transportation roadway 7 through the connecting roadways 11 respectively.

[0044] The conveying system is arranged in the east air-return roadway 1, the track roadway 2, the belt conveyor roadway 3, the west air-return roadway 4, the gas comprehensive roadway 5, the main haulage roadway 6, the gangue haulage roadway 7 and the connecting roadway 11; the conveying system in the main haulage roadway 6 adopts a belt conveyor, which is used for conveying coal and gangue in time, and the gangue conveying is prohibited during the coal conveying; the conveying system in the gangue haulage roadway 7 adopts a belt conveyor, which is used for conveying gangue; the conveying system in the gas comprehensive roadway 5 adopts a belt conveyor, and the conveying system in the gas comprehensive roadway 5 together with the first gangue falling shaft 9 forms a first-stage flexible gangue discharge system of the gas comprehensive roadway 5, and the conveying system in the gangue haulage roadway 7 and the vertical gangue storage bin 8 form a second-stage flexible gangue discharge system; the horizontal gangue storage bin 15 is arranged in each system roadway, and the conveying system in the belt conveyor roadway 3 of the mining area together with the horizontal gangue storage bin 15 forms a first-stage flexible gangue discharge system; the conveying system in the east air-return roadway 1 of the mining area together with the horizontal gangue storage bin 15 forms a first-stage flexible gangue discharge system of the east air-return roadway 1 of the mining area, and the second gangue falling shaft 10 forms a second-stage flexible gangue discharge system; the conveying system in the track roadway 2 of the mining area together with the horizontal gangue storage bin 15 forms a first-stage flexible gangue discharge system of the track roadway 2 of the mining area, and the conveying system in the gangue haulage roadway 7 and the vertical gangue storage bin 8 form a second-stage flexible gangue discharge system; the conveying system in the west air-return roadway 4 of the mining area together with the horizontal gangue storage bin 15 forms a first-stage flexible gangue discharge system of the west air-return roadway 4 of the mining area, and the conveying system in the gangue haulage roadway 7 and the vertical gangue storage bin 8 form a second-stage flexible gangue discharge system.

[0045] The conveying system in the system roadway of the east air return roadway 1 of the mining area, the track roadway 2 of the mining area, the belt conveyor roadway 3 of the mining area and the west air return roadway 4 of the mining area comprises a first gangue scraper 12, a first buffer hopper 13, a first belt conveyor 14 and a second gangue scraper 16; the first gangue scraper 12 is arranged at the head of the roadway, and the type is selected according to the cross section of the roadway, the lithology and the driving cycle footage, so as to ensure high gangue discharge efficiency; the first buffer hopper 13 is connected between the discharge chute of the first gangue scraper 12 and the feeding end of the first belt conveyor 14, which can reduce the impact damage degree of hard gangue on the first belt conveyor 14, reduce the equipment failure rate, and also play the roles of flow guiding and dust reduction; the first buffer hopper 13 is assembled after being processed from A3 steel plates, and the size thereof is designed according to the site condition and the size of the equipment; the feeding port height of the horizontal gangue storage bin 15 satisfies that the gangue falling height is greater than or equal to 2.5 m, the discharge port is located at the lower part of the other side, the horizontal gangue storage bin 15 is underpaved to form a 10°-20° gentle slope outside the discharge port, the discharge end of the first belt conveyor 14 is lifted and connected with the feeding port of the horizontal gangue storage bin 15, and the second gangue scraper 16 is arranged at the discharge port side of the horizontal gangue storage bin 15; the first belt conveyor 14 is a belt conveyor, the first gangue scraper 12 and the second gangue scraper 16 are both P-120B scraper rock loading machines; the first gangue scraper 12 can send the gangue generated by the head driving to the first belt conveyor 14 through the first buffer hopper 13, the first belt conveyor 14 can convey the gangue to the horizontal gangue storage bin 15 for storage, and the second gangue scraper 16 can scrape the gangue in the horizontal gangue storage bin 15 to the next transportation link.

[0046] The gangue storage capacity of the horizontal gangue storage bin 15 satisfies the gangue discharge requirement of the head footage, and is calculated by the following formula:

[0047] V = μnsl;

[0048] In the formula, V is the gangue storage capacity, m 3 ;

[0049] μ is the gangue expansion coefficient;

[0050] n is the driving cycle number;

[0051] s is the driving raw cross section area of the roadway, m 2 ;

[0052] l is the driving cycle footage, m.

[0053] The horizontal gangue storage bin 15 comprises a column, a side plate, a tray and an anchor rod; the column is a 4m long I-beam, and a plurality of columns are arranged at an interval of 1m to form the outer contour of the horizontal gangue storage bin 15; the lower end of the column is fixedly connected in a leg hole with a depth of 500mm dug in the floor of the roadway by pouring concrete; the side plate is a 4500mm*300mm*70mm wooden plate, and the side plate is fixedly connected to the column by 8# iron wire to form the closed side wall of the horizontal gangue storage bin 15; the tray is a square and is made of a 16mm thick A3 steel plate, and the side length of the tray is 200mm; four through holes with a diameter of 30mm are arranged around the middle position of the tray, and the tray is welded to the upper end of the column; four anchor rods are arranged around the outer periphery of the column, and the anchor rods pass through the through holes of the tray and are anchored in the drill holes of the roof of the roadway.

[0054] A gangue protection net is arranged around the outer periphery of the middle trough of the first and second gangue scraping machines 12 and 16 to avoid the gangue from bouncing out and hurting people during the gangue discharging process; the gangue protection net comprises a reinforcing mesh and an anchor cable steel strand, the reinforcing mesh has a specification of φ6.5*900*1700mm, a plurality of reinforcing meshes are spliced and fixedly connected to the anchor cable steel strand; the upper end of the anchor cable steel strand is anchored in the drill hole of the roof of the roadway, and the lower end is fixedly connected to the middle trough by a lock.

[0055] The conveying system in the connecting roadway 11 comprises a second belt conveyor 19 and a second buffer hopper 20; the connecting roadway 11 is a flat roadway, and the floor of the connecting roadway 11 is higher than the floor of the gangue transportation roadway 7, and the height difference h1 between the two is at least 1.5m to ensure that the second belt conveyor 19 and the rubber belt conveyor in the gangue transportation roadway 7 have a certain height difference at the gangue discharging point; the roof at the connection position of the connecting roadway 11 and the gangue transportation roadway 7 is chiseled and expanded to ensure the safety space for the operation and maintenance of the equipment; the second belt conveyor 19 is an electric drum rubber belt conveyor, and the second belt conveyor 19 extends from the entrance end to the exit end of the connecting roadway 11 and is used for conveying gangue; the second buffer hopper 20 is connected between the discharge end of the second belt conveyor 19 and the feeding end of the rubber belt conveyor in the gangue transportation roadway 7, and the distance h2 between the lower end of the second buffer hopper 20 and the rubber belt conveyor in the gangue transportation roadway 7 is about 0.5m, which can reduce the impact damage degree of hard gangue on the rubber belt conveyor in the gangue transportation roadway 7 and reduce the equipment failure rate, and also plays a role in flow guiding and dust reduction; the second buffer hopper 20 is assembled after being processed from an A3 steel plate, and the size thereof is specifically designed according to the site conditions and the size of the equipment.

[0056] As Figure 4 , Figure 5As shown, the vertical gangue storage bin 8 has a height of 25m-35m, and comprises an upper lock 81, a bin barrel 82, a lower lock 83, an anchor net spray supporting structure 84, and a reinforced concrete supporting structure 85. The upper lock 81, the bin barrel 82, and the lower lock 83 made of concrete are sequentially connected from top to bottom. The upper lock 81 has a diameter of 3m, and is fixedly connected to the floor of the gangue transportation roadway 7 through the outward flange of the upper end gangue inlet. The bin barrel 82 has a diameter of 6m, and the outer periphery of the bin barrel 82 is provided with the anchor net spray supporting structure 84. The lower lock 83 has a funnel structure with a gradually reduced cross section from top to bottom, and the lower end gangue outlet is square. The gangue outlet is provided with an openable and closable gangue discharge gate. The outer periphery of the lower lock 83 is sequentially provided with the anchor net spray supporting structure 84 and the reinforced concrete supporting structure 85 from inside to outside, forming a double supporting structure.

[0057] The anchor net spray supporting structure 84 comprises anchor rods, steel mesh, and concrete sprayed in the gap of the steel mesh. The anchor rods have a specification of φ22x2400, are fixedly connected to the vertical gangue storage bin 8, and extend into the surrounding soil layer. The steel mesh has a specification of φ6.5x900x1700mm, is spliced and wrapped on the outer layer of the vertical gangue storage bin 8, and is wrapped with two layers of steel mesh. The concrete sprayed in the gap of the steel mesh has a C20 label, and a spraying thickness of 150mm. First, the anchor net spray supporting structure 84 is used as temporary support, and then the reinforced concrete supporting structure 85 is used for support after the vertical gangue storage bin 8 is constructed to the bottom.

[0058] The reinforced concrete support structure 85 comprises a reinforced bottom beam 851, a first reinforced side beam 852, a second reinforced side beam 853, a first steel wire rope 854, a second steel wire rope 855, and a concrete layer 856; the reinforced bottom beam 851 is a square frame with a side length of 1200 mm formed by four 22a I-shaped steel, and is fixedly connected to the outer edge of the lower end of the lower lock 83, serving as a rooting beam for the later installed gangue discharge gate; the first reinforced side beam 852 and the second reinforced side beam 853 are made of old tracks with a specification of 24 kg / m or 30 kg / m, and are arranged around the outer side wall of the lower lock 83; the first reinforced side beam 852 extends from the upper end of the lower lock 83 to the lower end and is welded to the reinforced bottom beam 851; the second reinforced side beam 853 is arranged in the gap between adjacent first reinforced side beams 852 and extends from the upper end of the lower lock 83 to the middle position; the first steel wire rope 854 and the second steel wire rope 855 both have a specification of φ18.5 mm, and the first steel wire rope 854 is arranged around the outer side wall of the lower lock 83 and passes through the upper part of each first reinforced side beam 852 and each second reinforced side beam 853, and the second steel wire rope 855 is arranged around the outer wall of the lower lock 83 and passes through the middle part of each first reinforced side beam 852 and the lower part of each second reinforced side beam 853; the concrete layer 856 is made of C20 concrete and has a thickness of 500 mm, and is filled in the gap between the reinforced bottom beam 851, the first reinforced side beam 852, the second reinforced side beam 853, the first steel wire rope 854 and the second steel wire rope 855, forming a structure wrapped around the lower lock 83, and the anchor rod of the anchor net and shotcrete support structure 84 passes through the concrete layer 856 and enters the surrounding soil layer.

[0059] The construction steps of the coal rock time-sharing and flexible gangue discharging system are as follows:

[0060] Firstly, the east return air roadway 1, the track roadway 2, the belt conveyor roadway 3, the west return air roadway 4, the gas comprehensive roadway 5, the main transportation roadway 6, the gangue transportation roadway 7 and the second gangue chute 10 are constructed.

[0061] Secondly, the vertical gangue storage bin 8 is constructed, and the conveying system is arranged in the main transportation roadway 6 and the gangue transportation roadway 7.

[0062] Thirdly, the horizontal gangue storage bin 15 is constructed in the east return air roadway 1, the track roadway 2, the belt conveyor roadway 3 and the west return air roadway 4, and the conveying system is arranged.

[0063] Fourthly, the connecting roadway 11 is constructed, and the conveying system is arranged in the connecting roadway 11.

[0064] Fifthly, the first gangue chute 9 is constructed, and the conveying system is arranged in the gas comprehensive roadway 5.

[0065] In the east air return roadway 1 of the mining area, the horizontal waste rock storage bin 15 is arranged near the upper end of the second waste rock falling hole 10, and the second waste rock raking machine 16 can rake the waste rock in the horizontal waste rock storage bin 15 to the second waste rock falling hole 10, and the waste rock enters the belt conveyor in the main transportation roadway 6 through the second waste rock falling hole 10.

[0066] In the belt conveyor roadway 3 of the mining area, the horizontal waste rock storage bin 15 is arranged at a wide place at the roadway door opening, and the belt conveyor in the main transportation roadway 6 is connected with the belt conveyor and is provided with a buffer hopper at the lap joint of the belt conveyor in the main transportation roadway 6; when the waste rock needs to be discharged, the waste rock is transported to the horizontal waste rock storage bin 15 for storage, and the waste rock can be loaded into the belt conveyor through the second waste rock raking machine 16 at any time to avoid the problem of delayed waste rock discharge.

[0067] In the track roadway 2 and the west air return roadway 4 of the mining area, the horizontal waste rock storage bin 15 is arranged at a wide place at the roadway door opening during the early construction, and the waste rock is discharged through other transportation roadways connected therewith; when the track roadway 2 and the west air return roadway 4 of the mining area are constructed to a suitable position, the connecting roadway 11 is constructed, and after the track roadway 2 and the west air return roadway 4 of the mining area are connected with the waste rock transportation roadway 7 through the connecting roadway 11, the horizontal waste rock storage bin 15 is moved to the entrance end of the connecting roadway 11, and the second waste rock raking machine 16 can rake the waste rock in the horizontal waste rock storage bin 15 to the conveying system in the connecting roadway 11, and the conveying system in the connecting roadway 11 can transport the waste rock to the belt conveyor in the waste rock transportation roadway 7.

[0068] The first waste rock falling hole 9 and the second waste rock falling hole 10 are constructed by reverse drilling, first measuring and positioning, then constructing a small-diameter drilling hole, then replacing a large-diameter drill bit, and then completing the reverse drilling construction; the construction section diameter is 1200mm, and after the construction is completed, the sleeve wall is constructed; the sleeve wall is processed from a steel plate with a thickness of 8mm, the inner diameter is 1000mm, the length of each sleeve wall is 1000mm, the upper end and the lower end of each sleeve wall are respectively designed and processed to have connecting holes, and special fixing pins are used for connection; the sleeve wall is arranged in the middle, and C20 concrete is poured between the sleeve wall and the hole wall of the waste rock falling hole.

[0069] The coal rock time-sharing and flexible gangue discharging method also discloses a coal rock time-sharing and flexible gangue discharging system, and the method comprises the following steps: the gangue generated by the gas comprehensive roadway 5 is transported into the gangue transportation roadway 7 through the first gangue discharging hole 9; the gangue generated by the track roadway 2 and the west air return roadway 4 is transported into the gangue transportation roadway 7 through the connecting roadway 11; during the coal flow transportation of the main transportation roadway 6, the vertical gangue storage bin 8 and the gangue discharging gate of the second gangue discharging hole 10 are in the closed state, the gangue transported through the gangue transportation roadway 7 is temporarily stored in the vertical gangue storage bin 8, the gangue generated by the east air return roadway 1 is temporarily stored in the second gangue discharging hole 10, and the gangue generated by the belt conveyor roadway 3 is temporarily stored in the horizontal gangue storage bin 15; after the coal flow transportation of the main transportation roadway 6 is completed, the gangue discharging gate of the vertical gangue storage bin 8 and the second gangue discharging hole 10 is opened, the gangue stored in the horizontal gangue storage bin 15 in the belt conveyor roadway 3 is transported to the belt conveyor in the belt conveyor roadway 3 through the second gangue scraper 16 in the belt conveyor roadway 3, and then is transported to the belt conveyor in the main transportation roadway 6, the gangue is transported through the main transportation roadway 6, and the coal flow and the gangue flow are separately transported.

[0070] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by the equivalent features; and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible coal and rock disposal system with time-sharing and staggered transportation, characterized in that: The system roadway, the gas comprehensive roadway, the main haulage roadway, the gangue transportation roadway, the vertical gangue storage bin, the first gangue dumping hole, the second gangue dumping hole and the connecting roadway are provided. The gangue transportation roadway is communicated with the main haulage roadway through the vertical gangue storage bin, and the lower end of the gangue outlet of the vertical gangue storage bin is located directly above the conveying system in the main haulage roadway and is provided with an openable or closable gangue discharging gate. The gas comprehensive roadway is communicated with the gangue transportation roadway through the first gangue dumping hole, and the lower end of the gangue outlet of the first gangue dumping hole is located directly above the conveying system in the gangue transportation roadway and is provided with an openable or closable gangue discharging gate. The system roadway is communicated with the main haulage roadway in the same layer, communicated with the main haulage roadway through the second gangue dumping hole or communicated with the gangue transportation roadway through the connecting roadway, and the lower end of the gangue outlet of the second gangue dumping hole is located directly above the conveying system in the main haulage roadway and is provided with an openable or closable gangue discharging gate. The conveying systems are arranged in the system roadway, the gas comprehensive roadway, the main haulage roadway, the gangue transportation roadway and the connecting roadway, and a horizontal gangue storage bin is further arranged in the system roadway. The conveying system in the system roadway comprises a first gangue scraper, a first buffer hopper, a first belt conveyor and a second gangue scraper, the first gangue scraper is arranged at the head of the roadway, the first buffer hopper is connected between the discharge chute of the first gangue scraper and the feeding end of the first belt conveyor, the discharge end of the first belt conveyor is lifted and connected with the feeding port of the horizontal gangue storage bin, and the second gangue scraper is arranged at the discharge port of the horizontal gangue storage bin. The horizontal gangue storage bin comprises columns, side plates, a tray and anchor rods, the columns surround the outer contour of the horizontal gangue storage bin, the lower ends of the columns are fixedly connected to the floor of the roadway, the side plates are fixedly connected to the columns to form the closed side walls of the horizontal gangue storage bin, the tray is provided with a plurality of through holes around the middle position, the tray is fixedly connected to the upper ends of the columns, and the anchor rods are arranged around the outer periphery of the columns, pass through the through holes of the tray and are anchored in the drilled holes of the roof of the roadway.

2. The flexible coal and rock separating, time-sharing and separately transporting gangue discharge system according to claim 1, characterized in that: The middle troughs of the first gangue scraper and the second gangue scraper are each provided with a gangue prevention net, the gangue prevention net comprises a steel mesh and an anchor cable steel strand, the steel mesh is fixedly connected to the anchor cable steel strand, the upper end of the anchor cable steel strand is anchored in the drilled hole of the roof of the roadway, and the lower end of the anchor cable steel strand is fixedly connected to the middle trough through a lock.

3. The flexible coal and rock separating, time-sharing and separately transporting gangue discharge system according to claim 1, characterized in that: The conveying system in the connecting roadway comprises a second belt conveyor and a second buffer hopper, the floor of the connecting roadway is higher than that of the gangue transportation roadway, the roof of the connecting roadway is chiseled and expanded at the position communicated with the gangue transportation roadway, the second belt conveyor extends from the inlet end to the outlet end of the connecting roadway, and the second buffer hopper is connected between the discharge end of the second belt conveyor and the feeding end of the conveying system in the gangue transportation roadway.

4. The flexible coal and rock separating, time-sharing and separately transporting gangue discharge system according to claim 1, characterized in that: The vertical gangue storage bin comprises an upper lock, a bin barrel and a lower lock, the upper lock, the bin barrel and the lower lock are sequentially communicated from top to bottom, the upper lock is fixedly connected to the floor of the gangue transportation roadway, and the lower lock is in the form of a funnel structure gradually reduced from top to bottom in cross section.

5. The flexible coal and rock separating, time-sharing and separately transporting gangue discharge system according to claim 4, characterized in that: The vertical storage bin further comprises an anchor net spray support structure and a reinforced concrete support structure; the outer periphery of the bin cylinder is provided with the anchor net spray support structure; the outer periphery of the lower lock joint is sequentially provided from inside to outside with the anchor net spray support structure and the reinforced concrete support structure, forming a double support structure.

6. The flexible coal and rock separating and separately transporting and discharging system according to any one of claims 1-5, characterized in that: The construction steps of the coal rock time-sharing and flexible gangue conveying system are as follows: First step, construction of system roadway, gas comprehensive roadway, main transportation roadway, gangue transportation roadway and second gangue chute; Second step, construction of vertical storage bin and arrangement of conveying system in the main transportation roadway and the gangue transportation roadway; Third step, construction of horizontal storage bin in the system roadway and arrangement of conveying system; Fourth step, construction of connecting roadway and arrangement of conveying system in the connecting roadway; Fifth step, construction of first gangue chute and arrangement of conveying system in the gas comprehensive roadway.

7. The flexible coal and rock separating, time-sharing and separately transporting gangue discharge system according to claim 6, characterized in that: In the system roadway connected with the main transportation roadway in the same layer, the horizontal storage bin is arranged at the roadway opening; in the system roadway connected with the main transportation roadway through the second gangue chute, the horizontal storage bin is arranged near the upper end gangue inlet of the second gangue chute; in the system roadway connected with the gangue transportation roadway through the connecting roadway, the horizontal storage bin is arranged at the roadway opening in the early construction, and is moved to the entrance of the connecting roadway after the system roadway is connected with the gangue transportation roadway through the connecting roadway.

8. A flexible coal and rock separating and transporting method in time and space, characterized in that, The coal rock time-sharing and flexible gangue conveying system comprises the following steps: the gangue generated in the gas comprehensive roadway is conveyed into the gangue transportation roadway through the first gangue chute, and the gangue generated in the system roadway connected with the gangue transportation roadway through the connecting roadway is conveyed into the gangue transportation roadway through the connecting roadway; during the coal flow conveying in the main transportation roadway, the gangue conveying through the gangue transportation roadway is temporarily stored in the vertical storage bin; the gangue generated in the system roadway connected with the main transportation roadway through the second gangue chute is temporarily stored in the second gangue chute, and the gangue generated in the system roadway connected with the main transportation roadway in the same layer is temporarily stored in the horizontal storage bin; after the coal flow conveying in the main transportation roadway is completed, the gangue stored in the horizontal storage bin in the system roadway connected with the main transportation roadway in the same layer is conveyed to the conveying system in the main transportation roadway, and the gangue flow conveying is performed through the main transportation roadway.

Images