A thin coal seam mining system

Abstract

The invention discloses a thin coal seam coal mining system, comprising a scraper conveyor, a coal mining machine, a plurality of middle hydraulic supports, an advance support, a transfer machine, an end support and a cushion frame, the scraper conveyor is located between the coal mining machine and the plurality of middle hydraulic supports, the drive unit of the scraper conveyor is arranged in the mining tunnel and is extended along the extension direction of the mining tunnel; the end support and the advance support are arranged in the mining tunnel, the mining tunnel includes a transport tunnel and a return air tunnel, the transfer machine is only arranged in the transport tunnel, the transfer machine is located below the scraper conveyor, and the transfer machine is located between the advance support and the end support; the cushion frame is arranged in the transport tunnel and supported below the drive unit, the cushion frame includes a top seat connected to the drive unit, the height and inclination of the top seat are adjustable so that the height and inclination of the drive unit are adjustable. The thin coal seam coal mining system of the invention has good safety conditions, high resource recovery rate and high output.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, and in particular to a thin coal seam mining system. Background Art

[0002] In the existing technology, many thin coal seams in my country's coal-rich areas are abandoned and not mined, while in coal-deficient areas, blasting or ordinary machine mining is still commonly used. Some areas even still use backward mining methods such as manual mining. Therefore, the existing thin coal seam mining has a series of problems such as poor safety conditions, low resource recovery rate, low output, poor efficiency, and high labor intensity of workers. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a thin coal seam mining system, which has good safety conditions, high resource recovery rate, high output and low labor intensity.

[0005] The thin coal seam mining system of the embodiment of the present invention is arranged in the working face and the mining tunnel, the roof of the working face is flush with the roof of the mining tunnel, the bottom plate of the mining tunnel is lower than the bottom plate of the working face and comprises:

[0006] A scraper conveyor, a coal mining machine and a plurality of middle hydraulic supports are all arranged in the working face, the scraper conveyor is located between the coal mining machine and the plurality of middle hydraulic supports, and the driving part of the scraper conveyor is arranged in the mining roadway and extends along the extension direction of the mining roadway;

[0007] An advance support, a transfer machine, and an end support, wherein the end support and the advance support are arranged in the mining tunnel, the mining tunnel includes a transport tunnel and a return air tunnel, the transfer machine is arranged only in the transport tunnel, the transfer machine is located below the scraper conveyor and is used to receive the coal and rock transported by the scraper conveyor, and the transfer machine is located between the advance support and the end support;

[0008] A cushion frame is arranged in the transport lane and supported below the driving unit. The cushion frame includes a top seat connected to the driving unit. The height and inclination of the top seat are adjustable so that the height and inclination of the driving unit can be adjusted.

[0009] In some embodiments, the support frame comprises:

[0010] Pedestal;

[0011] A top seat, the top seat is arranged above the base and spaced apart from the base, and the top seat is provided with a connecting portion for connecting with a driving portion;

[0012] A guide assembly, wherein the guide assembly is disposed between the base and the top seat, the bottom end of the guide assembly is fixedly connected to the base, the top end of the guide assembly is spherically jointed with the top seat, and the guide assembly can be telescopically adjusted and can be maintained at a position after the telescopic adjustment;

[0013] Multiple pad frame drives are provided between the base and the top seat and are spaced apart along the circumference of the guide assembly. The bottom end of each pad frame drive is fixedly connected to the base, and the top end of each pad frame drive is ball-jointed with the top seat.

[0014] In some embodiments, the cushion frame includes a fixing pin, the guide assembly includes a guide block and a guide cylinder, the guide cylinder is fixedly connected to the base, the guide block is slidably assembled in the guide cylinder, and the guide block and the top seat are spherically hinged;

[0015] The guide block is provided with a plurality of first holes arranged at intervals along the sliding direction of the guide block, and the guide cylinder is provided with a plurality of second holes arranged at intervals along the sliding direction, the extension direction of the first holes is consistent with the extension direction of the second holes, and the fixing pin is used to be inserted into the first hole and the second hole at the same time to keep the guide assembly in the position after telescopic adjustment.

[0016] In some embodiments, the width of the first hole and the second hole in the horizontal direction is greater than the height in the vertical direction, and the width of the fixing pin in the horizontal direction is greater than the thickness in the vertical direction;

[0017] A convex portion is provided on the bottom side of the top seat, the surface of the convex portion is a spherical surface, a first ball socket is provided on the top of the guide block, and the convex portion fits in the first ball socket;

[0018] A plurality of column caps are arranged at intervals along the circumference of the convex portion on the bottom side of the top seat, a second ball socket is arranged in the column cap, a ball is arranged at the top end of the drive of the cushion frame, and the ball fits in the second ball socket;

[0019] A plurality of fixing seats are provided on the top side of the base, and the plurality of fixing seats and the plurality of column caps are arranged one by one opposite to each other in the up and down directions. The pad frame drive includes an outer cylinder and a piston. The outer cylinders of the plurality of pad frame drives are connected and fixed to the plurality of fixing seats, and each piston driven by the pad frame is provided with the sphere.

[0020] In some embodiments, the middle hydraulic support comprises:

[0021] A middle support base, wherein the middle support base is arranged on the bottom side of the middle hydraulic support;

[0022] A push rod, which is slidably mounted on the middle bracket base and connected to the scraper conveyor;

[0023] The middle bracket jack is arranged above the push rod, and the front end of the middle bracket jack is hinged to the middle bracket base, and the rear end of the middle bracket jack is hinged to the push rod.

[0024] In some embodiments, the coal mining machine includes two rocker arms and rollers respectively arranged on the two rocker arms, each of the rocker arms is provided with an inclinometer, and the inclinometer is used to detect the coal mining height of the roller, and the mining height range of the coal mining machine is 0.78m to 1.2m.

[0025] In some embodiments, the advance bracket comprises:

[0026] A front bracket and a rear bracket, wherein the front bracket is arranged in front of the rear bracket;

[0027] An intermediate telescopic beam, the intermediate telescopic beam being connected between the top beams of the front bracket and the rear bracket, and the intermediate telescopic beam being telescopic;

[0028] A guide beam and a first jack, wherein the guide beam is disposed at the front side of the base of the front bracket, and the first jack is connected between the guide beam and the base of the front bracket;

[0029] A drawer structure and a second jack, wherein the drawer structure is slidably mounted on the base of the front bracket, and a crusher is placed above the drawer structure, and the second jack is connected between the guide beam and the drawer structure;

[0030] A third jack is connected between bases of the front support and the rear support.

[0031] In some embodiments, the front bracket and the rear bracket each include two bracket units arranged opposite to each other in the width direction of the leading bracket, the bracket unit includes a unit base, a unit top beam, a stabilizing mechanism, two unit columns and a unit telescopic beam, the stabilizing mechanism and the two unit columns are both arranged between the unit base and the unit top beam, and the stabilizing mechanism is located between the two unit columns in the front-to-back direction, and the unit telescopic beam is arranged at the outer end of the unit top beam;

[0032] The drawer structure is arranged between the two unit bases of the front support, the two unit top beams of the front support are respectively connected to the two unit top beams of the rear support through an intermediate telescopic beam, and the two unit bases of the front support are respectively connected to the two unit bases of the rear support through a third jack.

[0033] In some embodiments, the advanced support comprises the following steps when used:

[0034] driving the second jack to contract to drive the drawer structure to move forward;

[0035] driving the first jack and the second jack to extend to drive the guide beam to move forward;

[0036] Lowering the front support, then driving the front support forward by the first jack and the third jack, and then raising the front support;

[0037] One of the bracket units of the rear bracket is lowered, and then the third jack is used to move one of the bracket units forward, and then the bracket is raised; another of the bracket units of the rear bracket is lowered, and then the third jack is used to move the other of the bracket units forward, and then the bracket is raised.

[0038] In some embodiments, the scraper conveyor includes a pad block, the base of the end bracket is provided with a connecting head, the pad block is provided with a plurality of fixing holes arranged at intervals along the extension direction of the pad block, and the connecting head is used to connect with different fixing holes to achieve position adjustment.

[0039] Beneficial effects: The thin coal seam mining system of the embodiment of the present invention has good safety status, high resource recovery rate, high output and low labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic top view of the overall structure of the thin coal seam mining system according to an embodiment of the present invention.

[0041] Figure 2 yes Figure 1 Schematic diagram of longitudinal section of medium-thin coal seam mining system at the scraper conveyor.

[0042] Figure 3 Schematic diagram of a support frame according to an embodiment of the present invention Figure 1 .

[0043] Figure 4 Schematic diagram of a support frame according to an embodiment of the present invention Figure 2 .

[0044] Figure 5 It is a schematic diagram of the base of the middle hydraulic support according to an embodiment of the present invention.

[0045] Figure 6 It is a three-dimensional schematic diagram of an advanced bracket according to an embodiment of the present invention.

[0046] Figure 7It is a side schematic diagram of a scraper conveyor and an end bracket according to an embodiment of the present invention.

[0047] Figure 8 It is a schematic diagram of the connection between the scraper conveyor and the base of the end bracket according to an embodiment of the present invention.

[0048] Reference numerals:

[0049] 1-scraper conveyor; 11-driving unit; 12-pad;

[0050] 2- Coal mining machine;

[0051] 3-middle hydraulic support; 31-middle support base; 32-push rod; 33-middle support jack;

[0052] 4-advanced bracket; 41-front bracket; 42-rear bracket; 43-middle telescopic beam; 44-third jack; 45-guide beam; 46-first jack; 47-drawer structure; 48-second jack; 49-bracket unit; 491-unit top beam; 492-unit base; 493-stabilizing mechanism; 494-unit column; 495-unit telescopic beam;

[0053] 5-Transfer machine;

[0054] 6-end bracket; 61-connector;

[0055] 7-bracket; 71-base; 711-fixed seat; 72-top seat; 721-connecting part; 7211-ear plate; 7212-third hole; 722-protrusion; 723-column cap; 73-guide assembly; 731-guide block; 7311-first hole; 732-guide cylinder; 7321-second hole; 74-bracket drive; 741-first bracket drive; 742-second bracket drive; 743-piston; 744-outer cylinder; 75-fixing pin. DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0057] like Figure 1 As shown, the thin coal seam mining system of the embodiment of the present invention includes a scraper conveyor 1, a coal mining machine 2, a plurality of middle hydraulic supports 3, an advance support 4, a transfer machine 5, an end support 6 and a cushion frame 7.

[0058] The above-mentioned thin coal seam mining system is mainly arranged in the working face and the mining tunnel. The roof of the working face is flush with the roof of the mining tunnel, and the floor of the mining tunnel is lower than the floor of the working face. Figure 1As shown, the working face generally extends along the left-right direction, there are two mining tunnels, namely the return air tunnel and the transport tunnel, and both mining tunnels generally extend along the front-back direction, and the working face is connected between the two mining tunnels.

[0059] like Figure 2 As shown, the mining tunnel of the embodiment of the present invention adopts the method of excavating along the top, that is, the top plate of the tunnel is flush with the top plate of the working face, and the bottom plate of the working face is far away from the bottom plate of the tunnel by a large part of the "step". Compared with the method of excavating along the bottom of the tunnel, in order to throw the coal into the transfer machine 5, the head of the scraper conveyor 1 needs to be raised, and the height of the working face is limited, so the coal mining machine 2 must destroy the top plate, which increases the danger, and because the coal mining machine 2 needs to climb the slope, the load of the coal mining machine 2 is increased. In addition, the raising of the head of the scraper conveyor 1 also throws away the bottom coal.

[0060] The coal mining system of the embodiment of the present invention adopts bottom excavation, and the transfer machine 5 is located below the head of the scraper in the tunnel, so that the same-height mining of the working face can be achieved.

[0061] The above-mentioned scraper conveyor 1, coal mining machine 2, and multiple middle hydraulic supports 3 are all arranged in the working surface, the scraper conveyor 1 is located between the coal mining machine 2 and the multiple middle hydraulic supports 3, and the drive unit 11 of the scraper conveyor 1 is arranged in the mining roadway and extends along the extension direction of the mining roadway. The drive unit 11 can be a head drive motor or a tail drive motor.

[0062] As a result, the driving part 11 can be made substantially perpendicular to the working surface, which greatly avoids the working space of the coal mining machine 2 compared with the situation that the driving part of the traditional scraper conveyor 1 is arranged horizontally and placed in the working surface.

[0063] The end support 6 is arranged in the mining tunnel. Figure 1 As shown, there are multiple end brackets 6, and end brackets 6 are arranged in the above-mentioned transport lane and return air lane. There can also be multiple advance brackets 4, and advance brackets 4 can also be arranged in the above-mentioned transport lane and return air lane. The transfer machine 5 can be arranged only in the transport lane, and the transfer machine 5 is located below the scraper conveyor and is used to receive the coal and rock transported by the scraper conveyor 1, and the transfer machine 5 is located between the advance bracket 4 and the end bracket 6.

[0064] During mining, the transport tunnel can be retained by leaving the tunnel along the air path, while the return air tunnel can be not retained by collapsing.

[0065] The support frame 7 is arranged in the transport lane and supported under the driving part 11. The support frame 7 includes a top seat 72 connected to the driving part 11. The height and inclination of the top seat 72 are adjustable so that the height and inclination of the driving part 11 are adjustable.

[0066] For example, Figure 2 As shown, the support frame 7 can be installed on the bottom side of the driving part 11. The driving part 11 can be specifically a head driving motor. A top seat 72 can be provided at the top of the support frame 7. The height dimension of the top seat 72 in the up and down directions and the inclination angle in the left and right directions can be adjusted, thereby meeting the needs of adjusting the height of the driving part 11 and correcting the deflection angle of the driving part 11, thereby ensuring good docking between the scraper conveyor 1 and the transfer machine 5 and ensuring the transportation efficiency.

[0067] The thin coal seam mining system of the embodiment of the present invention excavates the mining tunnel by digging along the top, avoiding the situation in the related art that digging along the bottom will damage the roof during the mining process, thereby improving the safety of mining. Secondly, it can also realize the mining of the bottom coal in the triangular area, with a high overall resource recovery rate and improved overall production.

[0068] In addition, the mechanization of mining on the entire working face has been achieved. Compared with manual mining, the overall labor intensity is low and the mining efficiency is high.

[0069] like Figure 3 As shown, the pad frame 7 of the embodiment of the present invention includes a base 71, a top seat 72, a guide assembly 73 and a plurality of pad frame drives 74.

[0070] The base 71 may be a flat plate structure, for example, a rectangular steel plate, etc. When in use, the base 71 may be placed directly on the bottom plate of the tunnel, thereby playing the role of bottom support and avoiding the situation where the downward force applied is too large.

[0071] The top seat 72 is disposed above the base 71 and spaced apart from the base 71, and the top seat 72 is provided with a connecting portion 721 for connecting with the driving portion 11. Figure 3 As shown, the top seat 72 can also be substantially in the shape of a rectangular plate, and the shape of the top seat 72 can be substantially the same as the shape of the base 71, and the top seat 72 can be located directly above the base 71. When in use, the cushion frame 7 can be installed below the driving part 11, and the top seat 72 can be connected and fixed to the driving part 11 by a connecting piece such as a pin.

[0072] The guide assembly 73 is arranged between the base 71 and the top seat 72. The bottom end of the guide assembly 73 is fixedly connected to the base 71, the top end of the guide assembly 73 is ball-jointed to the top seat 72, and the guide assembly 73 can be telescopically adjusted and can be maintained in the position after telescopic adjustment.

[0073] For example, Figure 3As shown, the guide assembly 73 can be a structural component with telescopic function such as a telescopic sleeve, and the guide assembly 73 extends in the up-down direction as a whole. The top end of the guide assembly 73 can be directly connected to the bottom ball joint of the top seat 72, and the bottom end of the guide assembly 73 can be connected and fixed to the base 71 by welding, fastener fixing, etc. The setting of the guide assembly 73 can enhance the limiting constraint effect, thereby ensuring the stability of the overall structure of the cushion frame 7.

[0074] When in use, the guide assembly 73 can be telescopically adjusted as needed, and after the guide assembly 73 is telescopically adjusted, the guide assembly 73 can be locked by a limiter or the like, so that the guide assembly 73 can be maintained in the shape after the telescopic adjustment.

[0075] A plurality of support drives 74 are disposed between the base 71 and the top seat 72 and are arranged at intervals along the circumference of the guide assembly 73, for example, Figure 3 As shown, three pad frame drives 74 can be provided, and the three pad frame drives 74 generally extend in the up and down direction. The bottom end of each pad frame drive 74 is fixedly connected to the base 71, and the top end of each pad frame drive 74 is ball-jointed with the top seat 72.

[0076] When in use, each pad frame drive 74 can be freely extended and retracted under the action of hydraulic pressure, so that the height of the top seat 72 can be adjusted. Secondly, the inclination angle of the top seat 72 can be adjusted by adjusting each pad frame drive 74 to different extension and retraction amounts, thereby simultaneously satisfying the correction adjustment of the height position and inclination orientation of the drive part 11.

[0077] In some embodiments, the support frame 7 includes a fixing pin 75, and the guide assembly 73 includes a guide block 731 and a guide cylinder 732, and the guide cylinder 732 is fixedly connected to the base 71, for example, Figure 3 and Figure 4 As shown, the guide block 731 may be a cubic columnar structure, the guide cylinder 732 may be a square cylinder structure, the guide cylinder 732 may be fixed at the center of the base 71 by welding, the guide block 731 is slidably assembled in the guide cylinder 732, and the guide block 731 and the top seat 72 are ball-jointed. When in use, the telescopic adjustment of the guide assembly 73 can be achieved by the relative sliding of the guide block 731 relative to the guide cylinder 732.

[0078] The guide block 731 is provided with a plurality of first holes 7311 arranged at intervals along the sliding direction of the guide block 731, and the guide cylinder 732 is provided with a plurality of second holes 7321 arranged at intervals along the sliding direction. The extension direction of the first hole 7311 is consistent with the extension direction of the second hole 7321, and the fixing pin 75 is used to be inserted into the first hole 7311 and the second hole 7321 at the same time to keep the guide assembly 73 in the position after telescopic adjustment.

[0079] For example, Figure 4 As shown, the guide block 731 is provided with a plurality of first holes 7311 , which can be arranged at equal intervals along the up and down direction, and the guide cylinder 732 is provided with a plurality of second holes 7321 , which can be arranged at equal intervals along the up and down direction.

[0080] When the guide block 731 is slidably adjusted relative to the guide cylinder 732, the fixing pin 75 can be inserted into the first hole 7311 and the second hole 7321 at the same time, so that the sliding locking of the guide block 731 relative to the guide cylinder 732 can be achieved by the stopping limit of the fixing pin 75, so that the guide assembly 73 can be maintained in the state after telescopic adjustment, thereby meeting the need for supporting the top seat 72.

[0081] It should be noted that there may be multiple fixing pins 75. When the guide assembly 73 is telescopically adjusted, the multiple fixing pins 75 may be respectively inserted into the corresponding first hole 7311 and the second hole 7321, thereby fully ensuring the overall shear strength of the structure.

[0082] In some embodiments, Figure 4 As shown, the first hole 7311 and the second hole 7321 can both be long holes, and the first hole 7311 and the second hole 7321 can both be arranged horizontally and extend in the horizontal direction. The width dimension of the aperture of the first hole 7311 and the second hole 7321 in the horizontal direction is greater than the height dimension in the vertical direction, and the width dimension of the fixing pin 75 in the horizontal direction is greater than the thickness dimension in the vertical direction. Therefore, since the guide block 731 and the guide cylinder 732 need to have a high shear resistance, this structural arrangement fully meets the use requirements of shear resistance.

[0083] In some embodiments, a protrusion 722 is provided on the bottom side of the top seat 72, and the surface of the protrusion 722 is a spherical surface. A first ball socket is provided on the top of the guide block 731, and the protrusion 722 fits in the first ball socket.

[0084] For example, Figure 4 As shown, the convex portion 722 can be integrally formed at the center of the bottom side of the top seat 72. The convex portion 722 can be generally a hemispherical structure. The top of the guide block 731 can be provided with a hemispherical groove, which is the first ball socket. During assembly, the convex portion 722 can be directly embedded in the first ball socket, thereby achieving the limit constraint of horizontal displacement and allowing the top seat 72 to tilt and swing relative to the guide assembly 73, fully meeting the needs of use.

[0085] In some embodiments, a plurality of column caps 723 are provided on the bottom side of the top seat 72, and the plurality of column caps 723 are arranged at intervals along the circumference of the protrusion 722, a second ball socket is provided in the column cap 723, and a sphere is provided at the top end of the support drive 74, and the sphere fits in the second ball socket.

[0086] For example, Figure 4 As shown, three column caps 723 can be provided, and the three column caps 723 can be integrally formed on the bottom side of the top seat 72 and can be adjacent to the corners of the top seat 72. A hemispherical groove can be provided on the bottom side of each column cap 723, and the groove is the second ball socket. A sphere can be provided on the top of the pad frame drive 74, and the sphere can be embedded in the second ball socket, thereby realizing the connection between the top seat 72 and the pad frame drive 74 on the one hand, and also enabling the top seat 72 to be tilted and swung relative to the pad frame drive 74 on the other hand, fully meeting the needs of adjusting the height and tilting position of the top seat 72.

[0087] In some embodiments, a plurality of fixing seats 711 are provided on the top side of the base 71, and the plurality of fixing seats 711 and the plurality of column caps 723 are arranged one by one opposite to each other in the up and down directions. The pad frame drive 74 includes an outer cylinder 744 and a piston 743. The outer cylinders 744 of the plurality of pad frame drives 74 are connected and fixed to the plurality of fixing seats 711, and the piston 743 of each pad frame drive 74 is provided with a ball.

[0088] For example, Figure 4 As shown, the fixing seat 711 can be generally in a square shape, and the fixing seat 711 can be fixed on the top side of the base 71 by welding and arranged adjacent to the edge of the base 71. In the up and down direction, multiple fixing seats 711 can be arranged one by one opposite to the above-mentioned multiple column caps 723.

[0089] like Figure 4 As shown, each cushion frame drive 74 may include an outer cylinder 744 and a plunger 743. The outer cylinder 744 may be connected and fixed to the corresponding fixing seat 711 by welding, and the plunger 743 may be slidably assembled in the outer cylinder 744. When in use, the plunger 743 may slide relative to the outer cylinder 744, so that the top seat 72 may be pushed up and pulled down.

[0090] In some embodiments, Figure 4 As shown, the connecting portion 721 includes two ear plates 7211, and the two ear plates 7211 are arranged relatively to each other in the extension direction of the first hole 7311, that is, the two ear plates 7211 are arranged relatively to each other in the front-to-back direction, and the height dimension of each ear plate 7211 first increases and then decreases along a direction orthogonal to the extension direction of the first hole 7311, that is, the height dimension of each ear plate 7211 shows a trend of first increasing and then decreasing along the direction from left to right.

[0091] The top seat 72 is connected to the driving part 11 through two ear plates 7211. The ear plates 7211 are provided with a third hole 7212, which is used for pins, shafts, etc. to pass through, so as to facilitate the pivotal assembly of the top seat 72 and the driving part 11. The third hole 7212 is provided in the middle of the extension direction of the ear plates 7211, and the extension direction of the third hole 7212 is consistent with the extension direction of the first hole 7311. That is, the first hole 7311, the second hole 7321, and the third hole 7212 all extend in the front-to-back direction. This facilitates the assembly and fixation of the fixing pin 75, the top seat 72, and the driving part 11 from the same side.

[0092] In some embodiments, Figure 4 and Figure 3 As shown, there are three pad frame drives 74, including a first pad frame drive 741 and two second pad frame drives 742. When in use, the two second pad frame drives 742 are both arranged behind the first pad frame drive 741, the first pad frame drive 741 and the guide assembly 73 are both arranged at the symmetrical center of the top seat 72, and the two second pad frame drives 742 are symmetrically arranged about the first pad frame drive 741 and the guide assembly 73. This is conducive to ensuring the overall structural stability during use.

[0093] In some embodiments, Figure 5 As shown, the middle hydraulic support 3 includes a middle support base 31, a push rod 32 and a middle support jack 33. The middle support base 31 is arranged at the bottom side of the middle hydraulic support 3. The push rod 32 is slidably assembled on the middle support base 31 and connected to the scraper conveyor 1. The middle support jack 33 is arranged above the push rod 32, and the front end of the middle support jack 33 is hinged to the middle support base 31, and the rear end of the middle support jack 33 is hinged to the push rod 32. The front end of the push rod 32 can be connected to the scraper conveyor 1. When in use, the push rod 32 can be pushed or pulled by the middle support jack 33, thereby meeting the use needs of pulling and moving the frame.

[0094] Specifically, the top beam and the shield beam of the middle hydraulic support 3 are provided with a single-side movable side guard plate, so as to effectively prevent the support from falling over. The base of the middle hydraulic support 3 can be an integral rigid base, the front of the base is connected by a thick steel plate bridge, and the rear is connected by a box-shaped structure. The middle hydraulic support 3 can adopt a double front connecting rod, double rear connecting rod, and double balance jack structure.

[0095] The middle part of the base is a pushing mechanism, and the middle bracket jack 33φ125 adopts a normal form. The pushing mechanism is an inverted long push rod 32 structure. The middle bracket jack 33 is a core component to ensure the bracket movement and realize the smooth movement of the scraper conveyor 1. The conventional thin coal seam bracket adopts a normal structure, which can reduce the impact of the middle bracket jack 33 on the space, but the normal pushing and pulling force is small and the adaptability is poor. Especially when the minimum height of the bracket is 600mm, the inverted push jack design is extremely difficult. The present invention optimizes the structure of the middle bracket jack 33 and the push rod 32 to achieve an inverted design and increase the moving speed.

[0096] The middle hydraulic support 3 is also designed as a single pedestrian passage. The minimum passage height before the support crosses the bridge is not less than 700mm to ensure space for people to pass through. The column adopts a large-flow safety valve of 500L / min to increase the movement speed of the support. The middle hydraulic support 3 adopts a double-drive connecting rod bottom lifting method, which occupies a small space and has a large bottom lifting amount.

[0097] In some embodiments, the coal mining machine 2 includes two rocker arms and rollers respectively arranged on the two rocker arms, each rocker arm is provided with an inclinometer, the inclinometer is used to detect the coal mining height of the roller, and the mining height range of the coal mining machine 2 is 0.78m to 1.2m.

[0098] Specifically, the coal mining machine 2 adopts a double rocker arm double drum thin-body coal mining machine 2, with an overall installed power of 440kW and a machine face height of 640mm. After the coal thickness changes, the drum size is changed for mining. The coal mining machine 2 is equipped with a rocker arm inclinometer: to detect the coal mining height, located in the rocker arm; the coal mining machine 2 is also equipped with an inertial navigation: to detect the straightness of the working surface, located in the fuselage; the coal mining machine 2 is also equipped with an encoder: to detect the position of the coal mining machine 2, located in the walking part; the coal mining machine 2 is also equipped with a fuselage inclination sensor: to detect the posture of the coal mining machine 2, set in the fuselage; the coal mining machine 2 is equipped with a special wide flat cable: to meet the needs of thin coal seam mining.

[0099] In some embodiments, Figure 6 As shown, the leading support 4 includes a front support 41 , a rear support 42 , a middle telescopic beam 43 , a guide beam 45 , a first jack 46 , a drawer structure 47 , a second jack 48 and a third jack 44 .

[0100] The front bracket 41 is arranged in front of the rear bracket 42, and the middle telescopic beam 43 is connected between the top beams of the front bracket 41 and the rear bracket 42, and the middle telescopic beam 43 is telescopic. For example, two middle telescopic beams 43 may be provided, and the two middle telescopic beams 43 are both connected between the top beams of the front bracket 41 and the rear bracket 42 and are arranged at intervals along the left-right direction.

[0101] The guide beam 45 is provided at the front side of the base of the front bracket 41, and the first jack 46 is connected between the guide beam 45 and the base of the front bracket 41. For example, two first jacks 46 may be provided, and the two first jacks 46 are both connected between the guide beam 45 and the base of the front bracket 41 and are arranged at intervals in the left-right direction. When in use, the two first jacks 46 may be extended or contracted at the same time, so that the front bracket 41 can be pulled or the guide beam 45 can be pushed forward.

[0102] The drawer structure 47 is slidably mounted on the base of the front bracket 41, and the crusher is placed above the drawer structure 47, and the second jack 48 is connected between the guide beam 45 and the drawer structure 47. Figure 6 As shown, the drawer structure 47 can be generally flat and square, and can be slidably assembled on the base of the front bracket 41 by rails, etc. The crusher can be directly placed on top of the drawer structure 47, thereby meeting the need for bottom support of the crusher.

[0103] There can be two second jacks 48, and both of them can be connected between the guide beam 45 and the drawer structure 47. When in use, the drawer structure 47 can be pushed or pulled by the contraction or extension of the two second jacks 48, meeting the need for driving the drawer structure 47.

[0104] The third jack 44 is connected between the bases of the front support 41 and the rear support 42. Figure 6 As shown, two third jacks 44 can be provided, and both third jacks 44 can be connected between the bases of the front bracket 41 and the rear bracket 42 and arranged at intervals in the left and right directions. When in use, the front bracket 41 can be moved or the rear bracket 42 can be pulled by contracting or extending the third jacks 44.

[0105] In some embodiments, Figure 6 As shown, the front bracket 41 and the rear bracket 42 both include two bracket units 49 arranged relatively to each other in the width direction of the advance bracket 4, and the bracket unit 49 includes a unit base 492, a unit top beam 491, a stabilizing mechanism 493, two unit columns 494 and a unit telescopic beam 495, the stabilizing mechanism 493 and the two unit columns 494 are both arranged between the unit base 492 and the unit top beam 491, and the stabilizing mechanism 493 is located between the two unit columns 494 in the front-to-back direction, and the unit telescopic beam 495 is arranged at the outer end of the unit top beam 491.

[0106] Specifically, a unit telescopic beam 495 is respectively provided at the front side of the two unit top beams 491 at the front side, and a unit telescopic beam 495 is also respectively provided at the rear side of the two unit top beams 491 at the rear side.

[0107] The drawer structure 47 is arranged between the two unit bases 492 of the front bracket 41. The two unit top beams 491 of the front bracket 41 are respectively connected to the two unit top beams of the rear bracket 42 through an intermediate telescopic beam 43. The two unit bases 492 of the front bracket 41 are respectively connected to the two unit bases 492 of the rear bracket 42 through a third jack 44.

[0108] In addition, the support distance of the leading support 4 can exceed 20m, while the support distances of the front support 41 and the rear support 42 are about 10m. A frame adjustment jack can also be provided between the top beams of the two support units 49 of the front support 41 and between the top beams of the two support units 49 of the rear support 42.

[0109] In some embodiments, the advanced support 4 includes the following steps when used:

[0110] S1: driving the second jack 48 to contract to drive the drawer structure 47 to move forward;

[0111] S2: driving the first jack 46 and the second jack 48 to extend to drive the guide beam 45 to move forward;

[0112] S3: lowering the front support 41, then driving the front support 41 forward by the first jack 46 and the third jack 44, and then raising the front support 41;

[0113] S4: lower one support unit 49 of the rear support 42, and then use the corresponding third jack 44 to move one support unit 49 forward, and then raise it; lower another support unit 49 of the rear support 42, and then use the corresponding third jack 44 to move the other support unit 49 forward, and then raise it.

[0114] Specifically, the control process of the advance bracket 4 is:

[0115] The first step: the system receives the push signal of the end bracket 6 or the remote control start signal-start. Specifically, the end bracket 6 and the leading bracket 4 move substantially synchronously, so the push signal of the end bracket 6 can be used as the moving signal of the leading bracket 4.

[0116] Step 2: Drive the oil cylinders of the two second jacks 48 to contract, thereby pulling the drawer structure 47 forward.

[0117] Step 3: After the oil cylinders of the two second jacks 48 are retracted to their proper positions, an extension command is sent to the oil cylinders of the first jack 46 and the second jack 48 , so that the first jack 46 and the second jack 48 are both extended and the guide beam 45 is moved forward.

[0118] Step 4: After the oil cylinders of the first jack 46 and the second jack 48 are in place, the two unit telescopic beams 495 on the front side are driven to retract simultaneously.

[0119] Step 5: After the two unit retractable beams on the front side are retracted to their proper positions, a command to lower the front support 41 is sent.

[0120] Step 6: After the two bracket units 49 of the front bracket 41 are lowered into place, send instructions to retract the first jack 46, extend the oil cylinders of the two third jacks 44, and extend the two middle telescopic beams 43. At this time, the two second jacks 48 are in a pressure-holding state.

[0121] Step 7: After the oil cylinders of the above-mentioned jacks are in place, a lifting command for the front bracket 41 is sent.

[0122] Step 8: After the front support 41 is lifted into place, the two unit telescopic beams 495 on the front side are driven to extend simultaneously.

[0123] Step 9: After the oil cylinders of the two unit telescopic beams 495 on the front side are in place, the unit telescopic beam 495 on the rear side and located on the right side is driven to retract.

[0124] Step 10: After the oil cylinder of the above-mentioned unit telescopic beam 495 is in place, a lowering command of the bracket unit 49 on the right side of the rear bracket 42 is sent.

[0125] Step 11: After the bracket unit 49 on the right side is lowered into place, a retraction command of the third jack 44 on the right side and a retraction command of the middle telescopic beam 43 on the right side are sent.

[0126] Step 12: After the third jack 44 on the right side and the oil cylinder of the middle telescopic beam 43 are in place, a lifting command of the bracket unit 49 on the right side is sent.

[0127] Step 13: After the oil cylinder of the bracket unit 49 on the right side of the rear bracket 42 is in place, the unit telescopic beam 495 on the rear side and located on the right side is driven to extend.

[0128] Step 14: After the oil cylinder of the unit telescopic beam 495 on the right side is in place, the unit telescopic beam 495 on the rear side and on the left side is driven to retract.

[0129] Step 15: After the oil cylinder of the unit telescopic beam 495 on the left side is in place, a lowering command of the bracket unit 49 on the left side of the rear bracket 42 is sent.

[0130] Step 16: After the bracket unit 49 on the left side is lowered into place, a retraction command of the third jack 44 on the left side and a retraction command of the middle telescopic beam 43 on the left side are sent.

[0131] Step 17: After the oil cylinder is in place, send a lifting command to the bracket unit 49 on the left side of the rear bracket 42.

[0132] Step 18: After the oil cylinder is in place, the unit telescopic beam 495 on the left side of the rear support 42 is driven to extend.

[0133] Step 19: End of process - feedback to centralized control.

[0134] In some embodiments, the scraper conveyor 1 includes a pad 12, the base of the end bracket 6 is provided with a connecting head 61, the pad 12 is provided with a plurality of fixing holes arranged at intervals along the extension direction of the pad 12, and the connecting head 61 is used to connect with different fixing holes to achieve position adjustment.

[0135] For example, the transport lane is a retention lane. In order to reduce the damage to the lane by the end bracket 6, the integrity of the lane is guaranteed as much as possible, such as Figure 7 and Figure 8 As shown, the end bracket 6 adopts an end bracket 6 with an ultra-narrow top beam and a base; the end bracket 6 is composed of two pieces, each piece has two front and rear columns; the end bracket 6 is connected to the pad 12 of the head of the scraper conveyor 1, so as to realize the movement of the pulling frame; each piece of the base of the end bracket 6 can have two jacks, and the two jacks are arranged on both sides of the base, so that the pulling force is sufficient and stable; the connecting head 61 of the push jack of the base of the end bracket 6 can adjust its own position through the fixed hole on the head pad 12 of the scraper conveyor 1, so that the connection is convenient and reliable.

[0136] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0137] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0138] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0139] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0140] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A thin coal seam mining system, characterized in that: Arranged in the working face and the mining tunnel, the roof of the working face is flush with the roof of the mining tunnel, the bottom plate of the mining tunnel is lower than the bottom plate of the working face and comprises: A scraper conveyor, a coal mining machine and a plurality of middle hydraulic supports are all arranged in the working face, the scraper conveyor is located between the coal mining machine and the plurality of middle hydraulic supports, and the driving part of the scraper conveyor is arranged in the mining roadway and extends along the extension direction of the mining roadway; An advance support, a transfer machine, and an end support, wherein the end support and the advance support are arranged in the mining tunnel, the mining tunnel includes a transport tunnel and a return air tunnel, the transfer machine is arranged only in the transport tunnel, the transfer machine is located below the scraper conveyor and is used to receive the coal and rock transported by the scraper conveyor, and the transfer machine is located between the advance support and the end support; A cushion frame, the cushion frame is arranged in the transport lane and supported below the driving unit, the cushion frame includes a top seat connected to the driving unit, the height and inclination of the top seat are adjustable so that the height and inclination of the driving unit are adjustable; The support frame comprises: Pedestal; A top seat, the top seat is arranged above the base and spaced apart from the base, and the top seat is provided with a connecting portion for connecting with a driving portion; A guide assembly, wherein the guide assembly is disposed between the base and the top seat, the bottom end of the guide assembly is fixedly connected to the base, the top end of the guide assembly is spherically jointed with the top seat, and the guide assembly can be telescopically adjusted and can be maintained at a position after the telescopic adjustment; Multiple pad frame drives are provided between the base and the top seat and are spaced apart along the circumference of the guide assembly. The bottom end of each pad frame drive is fixedly connected to the base, and the top end of each pad frame drive is ball-jointed with the top seat.

2. The thin coal seam mining system according to claim 1, characterized in that: The cushion frame includes a fixing pin, the guide assembly includes a guide block and a guide cylinder, the guide cylinder is fixedly connected to the base, the guide block is slidably assembled in the guide cylinder, and the guide block and the top seat are spherically hinged; The guide block is provided with a plurality of first holes arranged at intervals along the sliding direction of the guide block, and the guide cylinder is provided with a plurality of second holes arranged at intervals along the sliding direction, the extension direction of the first holes is consistent with the extension direction of the second holes, and the fixing pin is used to be inserted into the first hole and the second hole at the same time to keep the guide assembly in the position after telescopic adjustment.

3. The thin coal seam mining system according to claim 2, characterized in that: The width of the first hole and the second hole in the horizontal direction is greater than the height in the vertical direction, and the width of the fixing pin in the horizontal direction is greater than the thickness in the vertical direction; A convex portion is provided on the bottom side of the top seat, the surface of the convex portion is a spherical surface, a first ball socket is provided on the top of the guide block, and the convex portion fits in the first ball socket; A plurality of column caps are arranged at intervals along the circumference of the convex portion on the bottom side of the top seat, a second ball socket is arranged in the column cap, a ball is arranged at the top end of the drive of the cushion frame, and the ball fits in the second ball socket; A plurality of fixing seats are provided on the top side of the base, and the plurality of fixing seats and the plurality of column caps are arranged one by one opposite to each other in the up and down directions. The pad frame drive includes an outer cylinder and a piston. The outer cylinders of the plurality of pad frame drives are connected and fixed to the plurality of fixing seats, and each piston driven by the pad frame is provided with the sphere.

4. The thin coal seam mining system according to claim 1, characterized in that: The middle hydraulic support comprises: A middle support base, wherein the middle support base is arranged on the bottom side of the middle hydraulic support; A push rod, which is slidably mounted on the middle bracket base and connected to the scraper conveyor; The middle bracket jack is arranged above the push rod, and the front end of the middle bracket jack is hinged to the middle bracket base, and the rear end of the middle bracket jack is hinged to the push rod.

5. The thin coal seam mining system according to claim 1, characterized in that: The coal mining machine comprises two rocker arms and rollers respectively arranged on the two rocker arms, each of the rocker arms is provided with an inclinometer, and the inclinometer is used to detect the coal mining height of the roller, and the mining height range of the coal mining machine is 0.78m to 1.2m.

6. The thin coal seam mining system according to claim 1, characterized in that: The advanced support comprises: A front bracket and a rear bracket, wherein the front bracket is arranged in front of the rear bracket; An intermediate telescopic beam, the intermediate telescopic beam being connected between the top beams of the front bracket and the rear bracket, and the intermediate telescopic beam being telescopic; A guide beam and a first jack, wherein the guide beam is disposed at the front side of the base of the front bracket, and the first jack is connected between the guide beam and the base of the front bracket; A drawer structure and a second jack, wherein the drawer structure is slidably mounted on the base of the front bracket, and a crusher is placed above the drawer structure, and the second jack is connected between the guide beam and the drawer structure; A third jack is connected between bases of the front support and the rear support.

7. The thin coal seam mining system according to claim 6, characterized in that: The front bracket and the rear bracket each include two bracket units arranged opposite to each other in the width direction of the leading bracket, the bracket unit includes a unit base, a unit top beam, a stabilizing mechanism, two unit columns and a unit telescopic beam, the stabilizing mechanism and the two unit columns are both arranged between the unit base and the unit top beam, and the stabilizing mechanism is located between the two unit columns in the front-rear direction, and the unit telescopic beam is arranged at the outer end of the unit top beam; The drawer structure is arranged between the two unit bases of the front support, the two unit top beams of the front support are respectively connected to the two unit top beams of the rear support through an intermediate telescopic beam, and the two unit bases of the front support are respectively connected to the two unit bases of the rear support through a third jack.

8. The thin coal seam mining system according to claim 7, characterized in that: The advanced support comprises the following steps when in use: driving the second jack to contract to drive the drawer structure to move forward; driving the first jack and the second jack to extend to drive the guide beam to move forward; Lowering the front support, then driving the front support forward by the first jack and the third jack, and then raising the front support; One of the bracket units of the rear bracket is lowered, and then the third jack is used to move one of the bracket units forward, and then the bracket is raised; another of the bracket units of the rear bracket is lowered, and then the third jack is used to move the other of the bracket units forward, and then the bracket is raised.

9. The thin coal seam mining system according to any one of claims 1 to 8, characterized in that: The scraper conveyor includes a cushion block, the base of the end bracket is provided with a connecting head, the cushion block is provided with a plurality of fixing holes arranged at intervals along the extension direction of the cushion block, and the connecting head is used to connect with different fixing holes to achieve position adjustment.

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