Top coal caving working face supporting and transporting system and using method

Abstract

The invention discloses a top coal caving working face supporting and transporting system and a using method, the top coal caving working face supporting and transporting system comprises a reversed loader, a crusher, a first support, a second support, a first jack, a second jack, a third support, an end support, a first scraper conveyor, a second scraper conveyor and a plurality of transition supports, and the crusher is arranged in the middle of the reversed loader; the first support and the second support both straddle the reversed loader, and the crusher is located between the first support and the second support. The first jack is connected between the first bracket and the crusher, and the second jack is connected between the crusher and the second bracket; the second bracket is connected between the crusher and the third bracket; the end support comprises a third jack connected with the tail of the reversed loader, the first scraper conveyor is in butt joint with the reversed loader, and the second scraper conveyor is connected with the reversed loader. The transition support is connected between the first scraper conveyor and the second scraper conveyor. The supporting and transporting system is short in overall length and simple in structure, and the supporting requirement for a large-area triangular area is met.

Description

Technical Field

[0001] The present invention relates to the field of mining technology, and in particular to a top coal caving working face support and transportation system and a use method thereof. Background Art

[0002] For the top coal caving working face, since the scraper conveyor needs to be arranged in front and behind the middle hydraulic support, compared with the comprehensive mining of full height at one time, the top coal caving working face has the characteristics of longer transfer machine, larger top protection area required in the triangle area, more complex equipment matching, and heavier weight of the pushing equipment. The support and transportation system in the existing technology mostly adopts the pushing method such as self-movement of the transfer machine. The entire support and transportation system has a long length, a large number of complex equipment, and a small support area, which cannot meet the use needs of top coal caving mining. 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 support and transportation system for a top coal caving working face. The support and transportation system for the top coal caving working face has a short overall length and a simple structure, and also meets the support needs for a large triangular area, thereby fully meeting the support and transportation requirements for top coal caving mining.

[0005] The embodiment of the present invention also proposes a method for using the above-mentioned top coal caving working face support and transportation system.

[0006] The top coal caving working face support and transportation system of the embodiment of the present invention comprises:

[0007] A transfer machine and a crusher, wherein the crusher is arranged in the middle of the transfer machine;

[0008] a first bracket and a second bracket, wherein the first bracket and the second bracket are both straddled on the transfer machine, the first bracket is adjacent to the head of the transfer machine, the second bracket is adjacent to the tail of the transfer machine, and the crusher is located between the first bracket and the second bracket;

[0009] a first jack and a second jack, wherein the first jack is connected between the first bracket and the crusher, and the second jack is connected between the crusher and the second bracket;

[0010] a third bracket, the third bracket being arranged on the non-production side of the transfer machine and connected to the second bracket, the second bracket being located between the crusher and the third bracket;

[0011] An end bracket, wherein the end bracket includes a third jack, and the third jack is connected to the tail of the transfer machine;

[0012] A first scraper conveyor and a second scraper conveyor, wherein the second scraper conveyor is located between the first scraper conveyor and the end bracket, the first scraper conveyor is docked with the transfer machine, and the second scraper conveyor is connected to the transfer machine;

[0013] A plurality of transition brackets are provided between the first scraper conveyor and the second scraper conveyor, and the transition brackets include a fourth jack and a connecting piece, the fourth jack is connected to the first scraper conveyor, and the connecting piece is connected to the second scraper conveyor.

[0014] In some embodiments, the first bracket and the second bracket are both walking brackets, and the walking bracket includes two supporting single frames arranged relatively to each other in the width direction of the transfer machine, the transfer machine is located between the two supporting single frames of the walking bracket, and each of the supporting single frames is connected to the crusher through the first jack or the second jack, and the third bracket is connected to the supporting single frame on the non-production side of the second bracket.

[0015] In some embodiments, the top beams of the two supporting single frames of the first bracket are connected via a first frame adjustment jack, the bases of the two supporting single frames of the first bracket are connected via a second frame adjustment jack, and the top beams of the two supporting single frames of the second bracket are connected via a third frame adjustment jack.

[0016] In some embodiments, the single support frame includes two first columns and a first stabilizing mechanism, the first stabilizing mechanism is disposed between the two first columns along the extension direction of the transfer machine, and the first stabilizing mechanism of the first support and the first stabilizing mechanism of the second support are arranged in mirror symmetry;

[0017] And / or, the third bracket includes two second columns and a second stabilizing mechanism, and the second stabilizing mechanism is arranged between the two second columns along the extension direction of the transfer machine.

[0018] In some embodiments, the supporting single frame includes a front beam and a telescopic beam. The top beam of the first bracket is connected between the two front beams in the extension direction of the transfer machine. Only the side of the top beam of the second bracket facing the first bracket is provided with the front beam and the telescopic beam. Each front beam can be swung and adjusted relative to the top beam. The telescopic beam is assembled in the front beam, and the telescopic beam is movable relative to the front beam in the extension direction of the transfer machine.

[0019] In some embodiments, the two supporting frames of the walking-type bracket are respectively a first supporting frame and a second supporting frame, the first supporting frame is located on the production side, and the second supporting frame is located on the non-production side, the top beam and the front beam of the first supporting frame are both provided with top guard plates on the non-production sides, and the top beam and the front beam of the second supporting frame are both provided with top guard plates on the production side and the non-production side.

[0020] In some embodiments, the strokes of the first jack and the second jack are both greater than a working surface cut depth;

[0021] And / or, the top beam of the third bracket and the top beam of the second bracket, and the base of the third bracket and the base of the second bracket are connected via a connecting beam.

[0022] In some embodiments, the transition bracket located at the end of the plurality of transition brackets is provided with a top guard plate on the side facing the transfer machine.

[0023] In some embodiments, the base of the end bracket is provided with a push rod, the push rod is slidably assembled on the base of the end bracket, and one end of the push rod is connected to the tail of the transfer machine, and the other end of the push rod is connected to the third jack, the third jack is arranged above the push rod and stacked with the push rod in the up and down directions, and the connection between the third jack and the push rod is arranged away from the transfer machine.

[0024] The method of using the embodiment of the present invention comprises the following steps:

[0025] S1: After the coal mining machine has cut through the coal at the head of the machine, the fourth jack is used to push the first scraper conveyor to complete the frame shifting;

[0026] S2: using a first jack to push the first bracket to move the first bracket forward by one step;

[0027] S3: Use the first jack, the second jack, and the third jack to collaboratively pull the crusher, the transfer machine, and the second scraper conveyor forward one step;

[0028] S4: Use the second jack to pull the second bracket and the third bracket forward by one step;

[0029] S5: Use the third jack to pull the end bracket to move one step distance;

[0030] S6: Repeat the above steps until the mining of one working face is completed.

[0031] Beneficial effects: The support and transportation system and use method of the top coal caving working face of the embodiment of the present invention has a short overall length and a simple structure, and also meets the support needs of a large triangular area, thereby fully meeting the support and transportation requirements of top coal caving mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a left schematic diagram of the overall structure of the support and transportation system of an embodiment of the present invention.

[0033] Figure 2 It is a schematic top view of the overall structure of the support and transportation system of an embodiment of the present invention.

[0034] Figure 3 It is a left side schematic diagram of the overall structure of a support and transportation system according to another embodiment of the present invention.

[0035] Figure 4 It is a schematic diagram of a first supporting single frame and a second supporting single frame according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1-transfer machine; 2-crusher; 3-first support; 4-second support; 5-first jack; 6-second jack; 7-third support; 8-end support; 9-first scraper conveyor; 10-second scraper conveyor; 11-transition support; 12-front beam; 13-telescopic beam; 14-connecting beam; 15-first column; 16-first stabilizing mechanism; 17-second column; 18-second stabilizing mechanism; 19-first supporting single frame; 20-second supporting single frame; 21-top guard plate; 22-coal mining machine. DETAILED DESCRIPTION

[0038] 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.

[0039] like Figure 1 and Figure 2 As shown, the supporting and transporting system for the top coal caving working face of the embodiment of the present invention (hereinafter referred to as the supporting and transporting system) includes a transfer machine 1, a crusher 2, a first support 3, a second support 4, a first jack 5, a second jack 6, a third support 7, an end support 8, a first scraper conveyor 9, a second scraper conveyor 10 and a plurality of transition supports 11.

[0040] The crusher 2 is arranged in the middle of the transfer machine 1. For example, the transfer machine 1 can be arranged in the transport lane of the working surface and can extend along the transport lane, specifically along the Figure 1The crusher 2 can be installed in the middle of the transfer machine 1 in the front-to-back direction. When in use, the transfer machine 1 can transfer the coal mined from the working face to the belt conveyor, while the crusher 2 can realize the crushing operation of the block structure such as coal.

[0041] The first bracket 3 and the second bracket 4 both straddle the transfer machine 1 , the first bracket 3 is adjacent to the head of the transfer machine 1 , the second bracket 4 is adjacent to the tail of the transfer machine 1 , and the crusher 2 is located between the first bracket 3 and the second bracket 4 .

[0042] For example, only one of the first bracket 3 and the second bracket 4 is provided and both are advance support brackets. The first bracket 3 and the second bracket 4 can be generally gate-shaped, and the first bracket 3 and the second bracket 4 are both arranged in the transport lane and straddle the top of the transfer machine 1. The first bracket 3 can be located in front of the second bracket 4, and the first bracket 3 and the second bracket 4 can be used to protect the transfer machine 1 and the crusher 2.

[0043] The first jack 5 is connected between the first support 3 and the crusher 2, and the second jack 6 is connected between the crusher 2 and the second support 4. Figure 1 and Figure 2 As shown, two first jacks 5 and two second jacks 6 can be provided, and the two first jacks 5 can be respectively provided on the left and right sides of the transfer machine 1, and the two first jacks 5 are connected between the first bracket 3 and the crusher 2, and the two second jacks 6 can also be respectively provided on the left and right sides of the transfer machine 1, and the two second jacks 6 are connected between the second bracket 4 and the crusher 2.

[0044] The third support 7 is arranged on the non-production side of the transfer machine 1 and is connected to the second support 4. The second support 4 is located between the crusher 2 and the third support 7. Figure 1 and Figure 2 As shown, compared with the first bracket 3 and the second bracket 4, the third bracket 7 can be a single-row bracket, the non-production side of the transfer machine 1 can be the right side of the transfer machine 1, and the third bracket 7 can be only arranged on the right side of the transfer machine 1 and connected to the rear of the second bracket 4. When in use, the third bracket 7 can move synchronously with the second bracket 4 in the front and rear directions.

[0045] The end bracket 8 includes a third jack, and the third jack is connected to the tail of the transfer machine 1. The tail of the transfer machine 1 can be the rear end of the transfer machine 1, and the rear end of the transfer machine 1 can be provided with a push beam and other structures. The third jack can be installed at the base of the end bracket 8, and the third jack can be connected to the push beam and other structures of the transfer machine 1 through a push rod.

[0046] The second scraper conveyor 10 is located between the first scraper conveyor 9 and the end bracket 8. The first scraper conveyor 9 is connected to the transfer machine 1, and the second scraper conveyor 10 is connected to the transfer machine 1. Figure 2 As shown, the first scraper conveyor 9 and the second scraper conveyor 10 can both be arranged in the working face tunnel and extend in the left-right direction, and the first scraper conveyor 9 is arranged in front of the second scraper conveyor 10. The first scraper conveyor 9 can be directly connected to the transfer machine 1 by end unloading, and there is no rigid connection between the first scraper conveyor 9 and the transfer machine 1, that is, the first scraper conveyor 9 can move independently of the transfer machine 1. The second scraper conveyor 10 can be connected to the transfer machine 1 by cross-side unloading arrangement, so that the second scraper conveyor 10 and the transfer machine 1 can move synchronously.

[0047] A plurality of transition brackets 11 are arranged between the first scraper conveyor 9 and the second scraper conveyor 10 . The transition bracket 11 includes a fourth jack and a connecting piece. The fourth jack is connected to the first scraper conveyor 9 , and the connecting piece is connected to the second scraper conveyor 10 .

[0048] For example, Figure 2 As shown, three transition brackets 11 may be provided. In some other embodiments, two, four, or other transition brackets 11 may be provided. The three transition brackets 11 may be arranged at intervals in the left-right direction, and in the front-back direction, the three transition brackets 11 may be located between the first scraper conveyor 9 and the second scraper conveyor 10. The base of each transition bracket 11 may be provided with a fourth jack, and the front end of the fourth jack may be connected to the first scraper conveyor 9, so as to meet the need of pushing the first scraper conveyor 9 forward by means of the fourth jack. The top beam of each transition bracket 11 may be designed as a whole top beam.

[0049] The connecting piece may be a chain or the like, and the base of each transition bracket 11 may be connected to the second scraper conveyor 10 at the rear through the connecting piece, so that the second scraper conveyor 10 may be driven to move forward when the transition bracket 11 moves forward.

[0050] When the support and transportation system of the embodiment of the present invention is used, the coordinated operation of the first jack 5, the second jack 6, and the third jack can realize the overall pushing of the transfer machine 1, the crusher 2, etc., avoiding the situation in the prior art that a self-moving system needs to be set on the transfer machine 1 to realize the pushing, reducing the overall length dimension and facilitating the mobile operation during the mining process.

[0051] Secondly, by setting the first support 3, the second support 4, the third support 7, etc., the support operation of the advanced section and the triangular area of ​​the transport tunnel can be realized, and the overall roof protection area is large, which fully ensures the safety of the mining operation.

[0052] In some embodiments, the first bracket 3 and the second bracket 4 are both walking type brackets, which include two supporting single frames arranged relatively to each other in the width direction of the transfer machine 1. The transfer machine 1 is located between the two supporting single frames of the walking type brackets, and each supporting single frame is connected to the crusher 2 through the first jack 5 or the second jack 6. The third bracket 7 is connected to the supporting single frame on the non-production side of the second bracket 4.

[0053] For example, Figure 2 As shown, the first bracket 3 and the second bracket 4 may each include two supporting single frames arranged opposite to each other in the left-right direction, and the transfer machine 1 is located between the two supporting single frames of the first bracket 3 (the second bracket 4). The bases of the two supporting single frames of the first bracket 3 may be connected to the crusher 2 via a first jack 5, and the bases of the two supporting single frames of the first bracket 3 may be connected to the crusher 2 via a second jack 6. Thus, the use requirements of the first bracket 3 and the second bracket 4 for stepping forward are met.

[0054] In some embodiments, the top beams of the two support frames of the first bracket 3 are connected by a first frame adjustment jack, and the bases of the two support frames of the first bracket 3 are connected by a second frame adjustment jack. The first frame adjustment jack and the second frame adjustment jack make the distance between the top beams and the base of the two support frames of the first bracket 3 adjustable, thereby improving the adaptability to different working conditions during use. It should be noted that the transfer machine 1 can be arranged at an angle facing each other at the first bracket 3, thereby avoiding the interference between the second frame adjustment jack and the transfer machine 1.

[0055] The top beams of the two support frames of the second bracket 4 are connected by the third frame adjustment jack. The third frame adjustment jack makes the distance between the top beams of the two support frames of the second bracket 4 adjustable, thereby improving the adaptability of the second bracket 4. No frame adjustment jack is arranged between the bases of the two support frames of the second bracket 4, thereby avoiding the position interference with the transfer machine 1.

[0056] In some embodiments, the supporting single frame includes two first columns 15 and a first stabilizing mechanism 16. The first stabilizing mechanism 16 is arranged between the two first columns 15 along the extension direction of the transfer machine 1, and the first stabilizing mechanism 16 of the first bracket 3 and the first stabilizing mechanism 16 of the second bracket 4 are arranged in mirror symmetry.

[0057] For example, Figure 1 As shown, the first stabilizing mechanism 16 can be a four-bar linkage mechanism, the first stabilizing mechanism 16 can be connected between the top beam and the base of the supporting single frame, and the two first columns 15 can be respectively arranged on the front and rear sides of the first stabilizing mechanism 16.

[0058] It should be noted that the first stabilizing mechanism 16 can be V-shaped as a whole, wherein the first stabilizing mechanism 16 of the first bracket 3 can protrude rearward, and the first stabilizing mechanism 16 of the second bracket 4 can protrude forward, thereby ensuring the overall symmetry, which is beneficial to improving the structural stability of the advance section support of the transport lane.

[0059] In some embodiments, the third bracket 7 includes two second columns 17 and a second stabilizing mechanism 18 , and the second stabilizing mechanism 18 is disposed between the two second columns 17 along the extension direction of the transfer machine 1 .

[0060] For example, Figure 1 As shown, the second stabilizing mechanism 18 can be a two-link mechanism, the second stabilizing mechanism 18 can be V-shaped as a whole, and the second stabilizing mechanism 18 can be connected between the top beam and the base of the third bracket 7. The two second columns 17 can be respectively arranged at the front and rear sides of the second stabilizing mechanism 18.

[0061] In some embodiments, the supporting single frame includes a front beam 12 and a telescopic beam 13. The top beam of the first bracket 3 is connected between the two front beams 12 in the extension direction of the transfer machine 1. Only the top beam of the second bracket 4 is provided with a front beam 12 and a telescopic beam 13 on the side facing the first bracket 3. Each front beam 12 can be swung and adjusted relative to the top beam. The telescopic beam 13 is assembled in the front beam 12, and the telescopic beam 13 is movable relative to the front beam 12 in the extension direction of the transfer machine 1.

[0062] For example, Figure 1 As shown, the front and rear sides of the top beam of each supporting single frame of the first bracket 3 can be rotatably equipped with a front beam 12, and the front beam 12 is equipped with a jack, by means of which the front beam 12 can be driven to swing, thereby meeting the use needs of large-area roof protection.

[0063] like Figure 1 As shown, each front beam 12 can be equipped with a telescopic beam 13 and a corresponding jack, and the telescopic beam 13 can slide in the front and rear directions relative to the front beam 12, and the corresponding jack can realize the front and rear sliding drive of the telescopic beam 13. The setting of the telescopic beam 13 can further increase the roof protection area of ​​the supporting single frame.

[0064] Unlike the first bracket 3, the support frame of the second bracket 4 can be rotatably equipped with a front beam 12 only on the front side of the support frame, and the front beam 12 is also equipped with a jack, so that the front beam 12 can be driven to swing. Secondly, the front beam 12 can also be provided with a telescopic beam 13 and a corresponding jack, and the rear of the top beam of the support frame of the second bracket 4 can be directly connected to the top beam of the third bracket 7.

[0065] In some embodiments, the two supporting frames of the walking type support are respectively the first supporting frame and the second supporting frame. The first supporting frame is located on the production side, and the second supporting frame is located on the non-production side. The non-production side of the top beam and the front beam 12 of the first supporting frame are both provided with a top guard plate 21, and the production side and the non-production side of the top beam and the front beam 12 of the second supporting frame are both provided with a top guard plate 21.

[0066] For example, Figure 4 As shown, the first support 3 and the second support 4 can be regarded as being composed of two support single frames, the two support single frames are respectively the first support single frame and the second support single frame, and the production side can be regarded as the side close to the mining coal wall, that is, Figure 4 The left side of the non-production side can be regarded as the side away from the mining coal wall, that is, Figure 4 on the right side of the .

[0067] The first support frame can be located on the left side of the second support frame, wherein the top beam of the first support frame and the right side of each front beam 12 can be hingedly connected with a top guard plate 21. The top beam of the second support frame and the left and right sides of each front beam 12 can be hingedly connected with a top guard plate 21.

[0068] It should be noted that each top guard plate 21 is equipped with a corresponding top guard jack, which can realize the swing drive of the top guard plate 21, thereby meeting the use needs of shielding and protecting the top. Specifically, the top guard plate 21 between the first support frame and the second support frame can realize the shielding and protection of the transfer machine 1 and the crusher 2 below, while the top guard plate 21 on the right side of the second support frame can realize the shielding and protection of the sidewalk below, etc., which improves the safety of the overall mining operation process.

[0069] In some embodiments, the strokes of the first jack 5 and the second jack 6 are both greater than a working face cutting depth, thereby satisfying the use requirement of advancing a mining step distance by means of the first jack 5 and the second jack 6.

[0070] In some embodiments, the top beam of the third bracket 7 and the top beam of the second bracket 4, and the base of the third bracket 7 and the base of the second bracket 4 are connected by a connecting beam 14. For example, the connecting beam 14 can be a steel plate, a steel beam, etc. The front end of the connecting beam 14 can be hinged to the top beam or the base of the second bracket 4, and the rear end of the connecting beam 14 can be hinged to the top beam or the base of the third bracket 7. Thus, the use requirements of the third bracket 7 and the second bracket 4 moving forward synchronously are met, and the connection limit of the upper and lower connecting beams 14 can play a role in preventing falling.

[0071] In some embodiments, a transition bracket 11 at the end of the plurality of transition brackets 11 is provided with a top guard plate 21 on the side facing the transfer machine 1. Specifically, the transition bracket 11 located on the rightmost side of the plurality of transition brackets 11 may be provided with a top guard plate 21, and the top guard plate 21 may be provided on the right side of the top beam of the transition bracket 11 and arranged along the entire length of the top beam. The top guard plate 21 may be used to protect the first scraper conveyor 9, the second scraper conveyor 10, the mining and transportation equipment, etc.

[0072] In some embodiments, a push rod is provided at the base of the end bracket 8, and the push rod is slidably assembled on the base of the end bracket 8, and one end of the push rod is connected to the tail of the transfer machine, and the other end of the push rod is connected to the third jack, and the third jack is arranged above the push rod and stacked with the push rod in the up and down directions, and the connection between the third jack and the push rod is arranged away from the transfer machine.

[0073] Specifically, a slide groove can be provided in the base of the end bracket 8, and the slide groove generally extends along the front-to-back direction. The push rod extends along the front-to-back direction and is slidably assembled in the slide groove. The front end of the push rod can be hinged to the push beam of the transfer machine 1, and the rear end of the push rod can be pinned to the small cylinder of the third jack. Specifically, the third jack can be arranged above the push rod as a whole, and the front end of the third jack can be pinned to the base of the end bracket 8, and the rear end of the third jack can be pinned to the rear end of the push rod.

[0074] As a result, the inverted arrangement of the third jack is achieved, and the stacking arrangement of the third jack and the push rod in the upper and lower directions is also achieved, which is beneficial to further reduce the overall length dimension of the support and transportation system along the front and rear directions.

[0075] In some embodiments, Figure 3 As shown, the second stabilizing mechanism 18 may also be a four-bar linkage or other types of stabilizing mechanisms with lateral freedom.

[0076] In some other embodiments, the first bracket 3 and the second bracket 4 may also be brackets of other types such as sliding brackets.

[0077] The following describes the method of using the embodiment of the present invention.

[0078] The method of using the embodiment of the present invention comprises the following steps:

[0079] S1: After the coal mining machine 22 cuts through the coal at the head of the machine, the fourth jack is used to push the first scraper conveyor 9 to complete the following machine frame shifting.

[0080] For example, after the coal mining machine 22 has cut through the coal at the head, the fourth jack of the transition support 11 can be extended, so that the first scraper conveyor 9 can be pushed forward and the frame shifting with the machine can be completed. At this time, the first support 3, the second support 4, the end support 8, and the transition support 11 are in a supporting state, the first jack 5 and the second jack 6 are both in a retracted state, and the fourth jack of the transition support 11 is in an extended state. When the third jack is arranged inverted, the third jack is also in an extended state.

[0081] S2: Use the first jack 5 to push the first bracket 3 to move the first bracket 3 forward by one step. For example, the two first columns 15 of the first bracket 3 can be lowered, and then the first jack 5 can be extended to move the first bracket 3 forward by one step. After the step movement is completed, the two first columns 15 can be raised to the top beam, and at this time, the first jack 5 behind the first bracket 3 is in an extended state.

[0082] S3: Use the first jack 5, the second jack 6, and the third jack to cooperatively pull the crusher 2, the transfer machine 1, and the second scraper conveyor 10 forward one step.

[0083] For example, during operation, the first jack 5 can be retracted, the second jack 6 can be extended, and the third jack can be retracted. These three jacks can work together on the whole formed by the crusher 2, the transfer machine 1, and the second scraper conveyor 10 to achieve the forward movement of the overall structure by one step.

[0084] S4: Use the second jack 6 to pull the second bracket 4 and the third bracket 7 forward by one step. For example, the second bracket 4 and the third bracket 7 can be lowered synchronously, and then the second jack 6 between the second bracket 4 and the crusher 2 is retracted, so that the second bracket 4 and the third bracket 7 can be pulled forward by one step, and after being moved forward to the right position, the second bracket 4 and the third bracket 7 can be raised and connected.

[0085] S5: Use the third jack to pull the end bracket 8 to move a step. For example, for the third jack arranged in an inverted manner, the end bracket 8 can be pulled forward by a step by extending the third jack, and after being pulled into place, the end bracket 8 can be raised to the top.

[0086] S6: Repeat the above steps until the mining of one working face is completed.

[0087] A specific example of an embodiment of the present invention is described below.

[0088] The support and transportation system of the embodiment of the present invention includes a first bracket 3, a second bracket 4, a third bracket 7, and an end bracket 8 arranged in sequence from the head to the tail of the transfer machine 1. A crusher 2 is connected between the first bracket 3 and the second bracket 4. The crusher 2 is connected to the transport trough of the transfer machine 1 at the rear. The first scraper conveyor 9 and the second scraper conveyor 10 are respectively overlapped with the transfer machine 1, and the transition bracket 11 is located between the first scraper conveyor 9 and the second scraper conveyor 10.

[0089] The first bracket 3 and the second bracket 4 are both of the step-by-step self-moving type. The advance support length of the first bracket 3 and the second bracket 4 is not less than 20m. Each group of brackets is composed of an advance support single frame on the left and right. Each advance support single frame is composed of a base, a top beam, a column, a four-link, a hinged front beam 12, a telescopic beam 13, a top guard plate 21 and various jacks.

[0090] The top beams and base of the left and right frames of the first bracket 3 are respectively connected by frame adjustment jacks, and the top beams of the left and right frames of the second bracket 4 are also connected by frame adjustment jacks; a four-linkage is arranged in the middle of each supporting single frame as a stabilizing mechanism, and a first column 15 is arranged in front and behind the four-linkage mechanism as a supporting mechanism, and the base and the top beam are connected by the four-linkage mechanism and two first columns 15; the front beams 12 are respectively hinged to the front and rear of the top beams, and a jack is arranged between the front beam 12 and the top beam to realize the flipping of the hinged front beam 12; a telescopic beam 13 is arranged in the hinged front beam 12, and the jack is used as a power mechanism to realize the extension and retraction of the telescopic beam 13.

[0091] The top beam and the front beam 12 are respectively hinged with a roof guard plate 21 and a jack, wherein the top beams of the first bracket 3 and the second bracket 4 and the inner sides of the hinged front beam 12 are respectively hinged with a roof guard plate 21 and a jack to protect the transportation equipment below, and the right top beams of the first bracket 3 and the second bracket 4 and the hinged front beam 12 are hinged with a roof guard plate 21 and a jack on the non-production side to protect the pedestrian space below.

[0092] The crusher 2 is arranged between the first bracket 3 and the second bracket 4, and the base of the crusher 2 is in direct contact with the bottom plate. The bases of the first bracket 3 and the second bracket 4 are respectively connected to the push ear plates on both sides of the base of the crusher 2 through a double-acting cylinder on the left and right sides (which can be regarded as the first jack 5 and the second jack 6) through a pin shaft. The stroke of the four double-acting cylinders is greater than the cutting depth of a working surface.

[0093] The third bracket 7 is located behind the right bracket of the second bracket 4, and is composed of a base, a top beam, a column, two connecting rods, a rear hinged front beam 12, a telescopic beam 13, a top guard plate 21 and various jacks, wherein the top beam is connected to the base through two connecting rods, and two second columns 17 are arranged in front and behind the two connecting rods as a supporting mechanism.

[0094] An articulated front beam 12 and a jack are provided at the rear of the top beam to realize flipping; a telescopic beam 13 and a jack are arranged in the articulated front beam 12; a top guard plate 21 and a jack are arranged on both sides of the top beam of the third bracket 7 and the rear articulated front beam 12 to protect the transportation equipment and pedestrian space below; the top beam and the base are respectively connected to the right frame top beam and the base of the second bracket 4 through a connecting beam 14 to achieve anti-falling, and the connecting beam 14 does not have a telescopic function, so the movements of the third bracket 7 and the right side support single frame of the second bracket 4 are basically synchronized.

[0095] In order to reduce the length of the transport lane equipment and the mass of the pushing equipment, the transfer machine 1 is not equipped with a self-moving system. It is connected to the pushing jacks of the first bracket 3 and the second bracket 4 (which can be regarded as the first jack 5 and the second jack 6) through the pushing ear seat of the crusher 2, and is connected to the pushing jack of the end bracket 8 (which can be regarded as the third jack) through the pushing beam at the tail of the transfer machine 1. The two work together to realize the pushing of the transfer machine 1.

[0096] The first scraper conveyor 9 adopts an end-unloading arrangement, and the head of the machine has no rigid connection with the transfer machine 1; the second scraper conveyor 10 adopts a cross-side unloading arrangement, the second scraper conveyor 10 is cross-arranged with the scraper chain of the transfer machine 1, and the tail of the transfer machine 1 and the head of the second scraper conveyor 10 are an integrated structure.

[0097] The end bracket 8 is located at the rear of the transfer machine 1 and is connected to the tail push beam of the transfer machine 1 through the third jack. After the top beam, telescopic beam 13 of the end bracket 8 and the rear hinged front beam 12 of the third bracket 7 are extended, the shortest distance between the end bracket 8 and the third bracket 7 is 364 mm, thereby realizing the protection of the integrated mechanism of the tail of the transfer machine 1 and the head of the scraper conveyor.

[0098] Three transition brackets 11 are arranged at the head of the machine, which adopt a whole top beam design. The front part is pin-connected to the first scraper conveyor 9 through a push jack (which can be regarded as the fourth jack), and the rear part is connected to the second scraper conveyor 10 with a chain. A top guard plate is designed for the entire length of the outer side of the top beam of the first transition bracket 11 at the head of the machine.

[0099] The support and transportation system of the embodiment of the present invention has the following beneficial effects:

[0100] (1) It provides a transport tunnel advance section and triangular area support and transportation scheme with higher concentration, less equipment, simpler connection relationship and higher pushing efficiency for the top coal caving working face, shortens the length of the top coal caving working face loader, and realizes 20m advance roof support in the triangular area;

[0101] (2) A passive pushing scheme for the transfer machine in the transport lane of the top coal caving working face without anchoring frames and self-moving devices was proposed. The corresponding jacks of the advance bracket, end bracket, and head transition bracket were used to coordinately push the transfer machine, crusher, and second scraper conveyor integrated mechanism. The length of the transport lane equipment was reduced while meeting the functional requirements.

[0102] (3) The top beam and base of the third support are rigidly connected to the right support frame of the second support using a connecting beam, which can prevent the third support from falling over. At the same time, the two-link stabilizing mechanism can prevent over-constraint, increase the roof protection area of ​​the triangular area of ​​the transport lane, and fully ensure the safety of the equipment and pedestrians below.

[0103] (4) The transition bracket adopts a whole top beam design. The top guard plate is designed along the entire length of the outer side of the top beam of the first transition bracket at the head of the machine. While improving the overall rigidity of the transition bracket, it also protects the front and rear scraper conveyors and related mining and transportation equipment, thereby improving the overall safety protection.

[0104] 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 top coal caving working face support and transportation system, characterized in that: include: A transfer machine and a crusher, wherein the crusher is arranged in the middle of the transfer machine; a first bracket and a second bracket, wherein the first bracket and the second bracket are both straddled on the transfer machine, the first bracket is adjacent to the head of the transfer machine, the second bracket is adjacent to the tail of the transfer machine, and the crusher is located between the first bracket and the second bracket; a first jack and a second jack, wherein the first jack is connected between the first bracket and the crusher, and the second jack is connected between the crusher and the second bracket; a third bracket, the third bracket being arranged on the non-production side of the transfer machine and connected to the second bracket, the second bracket being located between the crusher and the third bracket; An end bracket, wherein the end bracket includes a third jack, and the third jack is connected to the tail of the transfer machine; A first scraper conveyor and a second scraper conveyor, wherein the second scraper conveyor is located between the first scraper conveyor and the end bracket, the first scraper conveyor is docked with the transfer machine, and the second scraper conveyor is connected to the transfer machine; A plurality of transition brackets are provided between the first scraper conveyor and the second scraper conveyor, and the transition brackets include a fourth jack and a connecting piece, the fourth jack is connected to the first scraper conveyor, and the connecting piece is connected to the second scraper conveyor.

2. The top coal caving working face support and transportation system according to claim 1 is characterized in that: The first bracket and the second bracket are both walking type brackets, and the walking type bracket includes two supporting single frames arranged opposite to each other in the width direction of the transfer machine. The transfer machine is located between the two supporting single frames of the walking type bracket, and each of the supporting single frames is connected to the crusher through the first jack or the second jack. The third bracket is connected to the supporting single frame on the non-production side of the second bracket.

3. The top coal caving working face support and transportation system according to claim 2 is characterized in that: The top beams of the two support frames of the first bracket are connected via a first frame adjustment jack, the bases of the two support frames of the first bracket are connected via a second frame adjustment jack, and the top beams of the two support frames of the second bracket are connected via a third frame adjustment jack.

4. The top coal caving working face support and transportation system according to claim 3 is characterized in that: The single support frame includes two first columns and a first stabilizing mechanism, wherein the first stabilizing mechanism is disposed between the two first columns along the extension direction of the transfer machine, and the first stabilizing mechanism of the first support and the first stabilizing mechanism of the second support are arranged in mirror symmetry; And / or, the third bracket includes two second columns and a second stabilizing mechanism, and the second stabilizing mechanism is arranged between the two second columns along the extension direction of the transfer machine.

5. The top coal caving working face support and transportation system according to claim 3 is characterized in that: The supporting single frame includes a front beam and a telescopic beam. The top beam of the first bracket is connected between the two front beams in the extension direction of the transfer machine. The front beam and the telescopic beam are only provided on the side of the top beam of the second bracket facing the first bracket. Each front beam can be swung and adjusted relative to the top beam. The telescopic beam is assembled in the front beam and is movable relative to the front beam in the extension direction of the transfer machine.

6. The top coal caving working face support and transportation system according to claim 5 is characterized in that: The two supporting frames of the walking type bracket are respectively a first supporting frame and a second supporting frame, the first supporting frame is located on the production side, and the second supporting frame is located on the non-production side, the top beam and the non-production side of the front beam of the first supporting frame are both provided with a top guard plate, and the top beam and the front beam of the second supporting frame are both provided with a top guard plate on the production side and the non-production side.

7. The top coal caving working face support and transportation system according to claim 1, characterized in that: The strokes of the first jack and the second jack are both greater than a working surface cut depth; And / or, the top beam of the third bracket and the top beam of the second bracket, and the base of the third bracket and the base of the second bracket are connected via a connecting beam.

8. The top coal caving working face support and transportation system according to claim 1, characterized in that: The transition bracket located at the end of the plurality of transition brackets is provided with a top guard plate on the side facing the transfer machine.

9. The top coal caving working face support and transportation system according to any one of claims 1 to 8, characterized in that: The base of the end bracket is provided with a push rod, and the push rod is slidably assembled on the base of the end bracket, and one end of the push rod is connected to the tail of the transfer machine, and the other end of the push rod is connected to the third jack, and the third jack is arranged above the push rod and stacked with the push rod in the up and down directions, and the connection between the third jack and the push rod is arranged away from the transfer machine.

10. A method for using the top coal caving working face support and transportation system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: After the coal mining machine has cut through the coal at the head of the machine, the fourth jack is used to push the first scraper conveyor to complete the frame shifting; S2: using a first jack to push the first bracket to move the first bracket forward by one step; S3: Use the first jack, the second jack, and the third jack to collaboratively pull the crusher, the transfer machine, and the second scraper conveyor forward one step; S4: Use the second jack to pull the second bracket and the third bracket forward by one step; S5: Use the third jack to pull the end bracket to move one step distance; S6: Repeat the above steps until the mining of one working face is completed.

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