7-shaped shield support for mining and support moving method

Abstract

The invention provides a mining 7-shaped shield support which comprises a top beam parallel to a top plate erected in a mine body, a supporting shield beam perpendicular to the top plate, a balance hydraulic cylinder connected between the top beam and the supporting shield beam, a support moving walking mechanism arranged on the top beam, a supporting beam sliding mechanism and a telescopic shield mechanism arranged on the supporting shield beam. The movable frame walking mechanism is arranged on one side, far away from the supporting shield beam, of the inner side face of the top beam and has the freedom degree of stretching and retracting relative to the top beam; the inner side face of the top beam is provided with a sliding rail extending along the moving frame walking mechanism, and the joist sliding mechanism is arranged on the inner side face of the top beam, clamped in the sliding rail and provided with the degree of freedom of sliding along the sliding rail relative to the top beam. One end of the balance hydraulic cylinder is hinged to the joist sliding mechanism, the other end of the balance hydraulic cylinder is hinged to the inner side face of the supporting shield beam, and the top beam has the freedom degree of swinging around a hinged shaft of the supporting shield beam under driving of the balance hydraulic cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of ore body mining equipment, and relates to a shield support for mining and a frame moving method, in particular to a "7"-shaped shield support for mining and a frame moving method. Background Art

[0002] Coal mines are sedimentary rocks, which have good left-right and front-back continuity and large blocks. Among the mining methods of coal mines, horizontal mining methods are mostly used. When this mining method is applied to sedimentary rocks, it has good continuity and does not require continuous frame moving. Metal veins are igneous rocks, and their formation process is gradually formed with volcanic eruptions or crustal compression. They have strong up-down continuity, poor left-right and front-back continuity, small blocks, and are mostly inclined downward or upward. When traditional horizontal mining methods and shielding supports are used in metal veins, continuous frame moving is required, which is extremely labor-intensive and has low mining efficiency. Moreover, traditional shielding supports are mostly suitable for horizontal mining. When they are applied to metal vein mining, the shielding space formed below them is not practical in the mining of metal veins, and the support stability is poor during the mining process.

[0003] Based on this, it is necessary to provide a shield support that is suitable for providing reliable and stable support and convenient for moving the frame when mining in a metal ore vein with strong vertical continuity. Summary of the invention

[0004] The purpose of the present invention is to provide a "7"-shaped shield support and a frame moving method for mining, so as to solve the technical problems in the prior art that the traditional shield support cannot provide stable and reliable support during the inclined downward mining of metal veins, and cannot form a shield space suitable for the mining needs of metal veins.

[0005] To achieve the above purpose, the specific technical solutions of the present invention are as follows:

[0006] A "7"-shaped shield support for mining, comprising a top beam parallel to a roof plate erected in a mine body, a supporting shield beam perpendicular to the roof plate, a balancing hydraulic cylinder connected between the top beam and the supporting shield beam, a frame moving walking mechanism and a beam support sliding mechanism arranged on the top beam, and a telescopic shield mechanism arranged on the supporting shield beam, wherein one end of the top beam and the supporting shield beam are hinged, and the frame moving walking mechanism is arranged on a side of the inner side surface of the top beam away from the supporting shield beam, and has the freedom to telescope relative to the top beam;

[0007] The inner side surface of the top beam is provided with a sliding track extending along the moving frame walking mechanism, and the supporting beam sliding mechanism is provided on the inner side surface of the top beam, is clamped in the sliding track, and has the freedom to slide along the sliding track relative to the top beam;

[0008] One end of the balancing hydraulic cylinder is hinged to the inner side of the top beam, and the other end is hinged to the inner side of the supporting shielding beam. The top beam has the freedom to swing around the hinge axis with the supporting shielding beam under the drive of the balancing hydraulic cylinder;

[0009] The telescopic shielding mechanism is arranged on the inner side surface of the supporting shielding beam and has the freedom to shrink relative to the lower end of the supporting shielding beam.

[0010] The frame moving walking mechanism includes a foot beam and a walking hydraulic cylinder. The top beam is box-shaped, and a telescopic groove is opened on the side of the top beam. One end of the foot beam is inserted into the telescopic groove and matches the gap with the telescopic groove, and the other end extends out of the top beam. The two ends of the walking hydraulic cylinder are respectively hinged to the top beam and the foot beam extending out of the top beam through a hinge seat A.

[0011] The joist sliding mechanism comprises a joist, a slide seat, a joist connecting lock, and a joist hydraulic cylinder. The top of the slide seat is clamped in the sliding track and has the freedom to slide relative to the sliding track.

[0012] The joist is in a rectangular parallelepiped shape and is pressed and arranged on the bottom surface of the slide seat by a joist connection lock. The joist connection lock is in a pin-shaped shape and is threadedly connected to the slide seat. The joist has the freedom to be pressed and released relative to the slide seat and to swing around the axis of the joist connection lock under the adjustment of the joist connection lock;

[0013] The two ends of the support beam hydraulic cylinder are respectively arranged on one end of the top beam close to the foot beam and on the sliding seat through an articulated seat B.

[0014] The telescopic shielding mechanism includes a telescopic shielding beam, a telescopic shielding hydraulic cylinder, and a spring tensioning mechanism. The supporting shielding beam includes a supporting shielding beam body. The telescopic shielding beam is arranged on the inner side surface of the supporting shielding beam body, and a bottom plate is arranged on the side extending out of the supporting shielding beam body. One end of the telescopic shielding hydraulic cylinder is fixed on the supporting shielding beam, and the other end points to the bottom plate. The spring clamping mechanism is a spring tensioning mechanism. The two ends of the spring tensioning mechanism are respectively fixed on the inner sides of the supporting shielding beam body and the telescopic shielding beam. When the telescopic shielding hydraulic cylinder is retracted to its original position, the spring tensioning mechanism is in a tensioned state.

[0015] The number of the traveling hydraulic cylinders is two, the supporting beam sliding mechanism is arranged in the middle of the top beam, and the traveling hydraulic cylinders are symmetrically arranged on both sides of the supporting beam sliding mechanism.

[0016] The two ends of the support beam are concave-convex structures that can cooperate with each other. Two or more pin holes are opened on the side of the concave-convex structure of the support beam. Multiple "7"-shaped shielding supports for mining are connected as a whole through the concave-convex structures of two adjacent support beams and the pin shafts.

[0017] The supporting shielding beam also includes wide guard plates arranged on both sides of the supporting shielding beam body. The number of the telescopic shielding hydraulic cylinders is two, and the telescopic shielding hydraulic cylinders are symmetrically arranged on the inner side surface of the supporting shielding beam body and adjacent to the wide guard plates.

[0018] The spring tensioning mechanism comprises a spring tensioning sleeve, and a fixed end and a telescopic end of the spring tensioning sleeve are respectively fixed on the supporting shielding beam body and the telescopic shielding beam.

[0019] A bottom protection plate is arranged on the outer side of the bottom plate supporting and protecting the beam body.

[0020] A method for moving a "7"-shaped shield support for mining, comprising the following steps:

[0021] S1, multiple "7"-shaped shielding supports for mining are erected in the tunnel, and adjacent "7"-shaped shielding supports for mining are connected and supported by the two ends of the supporting beam. All the traveling hydraulic cylinders and the supporting beam hydraulic cylinders are in place, and the telescopic shielding hydraulic cylinders are extended to drive the telescopic shielding beams to press against the tunnel floor, and the mining equipment is used to mine the mineable ore body in the frame. During the mining process, the traveling hydraulic cylinders are pressurized to control the foot beams to continuously extend and press against the top of the newly exposed ore body to be mined, until the mining area in the frame completes the height of a mining cycle, and the foot beams are extended to the full position, and the travel distance is L. At this time, the supporting beams are in the initial position relative to the top beams;

[0022] S2, control the single telescopic shield hydraulic cylinder to reduce pressure and drive the telescopic shield beam to retract and separate from the tunnel floor, then the walking hydraulic cylinder reduces pressure and drives the foot beam to retract 1 / 2L travel distance, at the same time, the supporting beam hydraulic cylinder extends and pushes the main body of the mining "7" shaped shield support to move 1 / 2L travel distance in the direction of the foot plate, then control the telescopic shield hydraulic cylinder to increase pressure and drive the telescopic shield beam to extend to press against the tunnel floor, at this time, the mining "7" shaped shield support moves forward 1 / 2L travel distance;

[0023] S3, loop step S2 until all mining "7" shaped shielding supports move forward by 1 / 2L travel distance;

[0024] S4, controls the hydraulic cylinders of all the "7"-shaped shield supports for mining to retract and pull the interconnected joists back to their initial positions relative to their own top beams;

[0025] S5, after controlling the telescopic shield hydraulic cylinder to reduce pressure and drive the telescopic shield beam to retract and separate from the tunnel floor, controlling the walking hydraulic cylinder to reduce pressure and drive the foot beam to retract the remaining 1 / 2L of the travel distance, at the same time, the supporting beam hydraulic cylinder extends and pushes the main body of the mining "7"-shaped shield support to move 1 / 2L of the travel distance in the direction of the foot plate, and then controlling the telescopic shield hydraulic cylinder to increase pressure and drive the telescopic shield beam to extend to press against the tunnel floor, at this time, the walking hydraulic cylinder retracts to the original position, and the mining "7"-shaped shield support moves forward a total travel distance of L and returns to the initial state;

[0026] S6, looping step S5 until all mining "7"-shaped shielding supports move forward the remaining 1 / 2L travel distance and then return to the initial state;

[0027] S7, carry out the next cycle of ore body mining and the rack transfer of steps S1 to S6.

[0028] The beneficial effects of the present invention are as follows: the present invention provides a "7"-shaped shield support and a frame moving method for mining, by setting the shield support in a "7" shape, and by setting a frame moving walking mechanism and a support beam sliding mechanism on the top beam, and connecting two adjacent shield supports by using the support beam sliding mechanism to form a whole, and in combination with setting a telescopic shield mechanism on the supporting shield beam, when mining the ore body at the lower end of the top beam in the mining area in the frame, the connection between the support beam sliding mechanism and the adjacent shield supports can be used to provide stable support for the top beam, and the frame moving walking mechanism is gradually controlled to extend during the mining process, so that it continuously presses against the top surface of the newly mined ore body, so that the lower end of the top beam is effectively supported, and the stability of the support of the shield support during the mining process is effectively improved;

[0029] In addition, the technical solution provided by the present invention can move the frame without removing the connection between the shielding support and the supporting beam after each mining cycle is completed through the cooperation of the frame moving walking mechanism and the supporting beam sliding mechanism. There is no need to disassemble the shielding support and then move the frame, which greatly reduces the workload and can effectively save time, thereby improving the continuity of metal ore mining and significantly improving its mining efficiency.

[0030] The structure of the shield support and the frame moving method provided by the present invention can well adapt to the extension mode of the metal ore vein, provide reliable, stable and continuous support for the inclined downward mining of the metal ore vein, thereby providing a sufficient safety foundation for the efficient mining of the metal ore vein, and is suitable for promotion and application in ore veins formed by igneous rocks such as metal ore veins. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the main structure of the inner side portion of the present invention;

[0033] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0034] Figure 4 It is a left side view of the present invention;

[0035] Figure 5 A bottom view of the present invention;

[0036] Figure 6 a is a diagram showing the initial support state of the shielding support in step S1 of the present invention;

[0037] Figure 6 b is a state diagram of the foot beam of the shielding bracket being extended into place in step S1 of the present invention;

[0038] Figure 6 c is a state diagram of the telescopic shielding beam of the shielding support when it is retracted in step S2 of the present invention;

[0039] Figure 6 d is a state diagram when the shielding support moves forward by a travel distance of 1 / 2L in step S2 of the present invention;

[0040] Figure 6 e is a state diagram when all shielding supports move forward by 1 / 2L travel distance in step S3 of the present invention;

[0041] Figure 6 f is a state diagram when all the supporting beams return to their initial positions relative to their own top beams in step S4 of the present invention;

[0042] Figure 6 g is a state diagram of the shielding support when the remaining travel distance of 1 / 2L is moved forward in step S5 of the present invention;

[0043] Figure 6 h is a state diagram of the shielding support when it moves forward a distance of L and returns to the initial state in step S5 of the present invention;

[0044] Figure 7 This is a schematic diagram of the shield support of the present invention being set up in a metal ore vein.

[0045] Explanation of marks in the figure: 1. top beam, 2. supporting shielding beam, 3. balancing hydraulic cylinder, 4. frame moving walking mechanism, 5. supporting beam sliding mechanism, 6. telescopic shielding mechanism, 7. sliding track, 8. foot beam, 9. walking hydraulic cylinder, 10. foot plate, 11. supporting beam, 12. sliding seat, 13. supporting beam connecting lock, 14. supporting beam hydraulic cylinder, 15. telescopic shielding beam, 16. telescopic shielding hydraulic cylinder, 17. supporting shielding beam body, 18. bottom plate, 19. spring tensioning sleeve, 20. bottom plate, 21. telescopic groove, 100, shielding bracket, 200, mineable ore body in the frame, 300, top plate, 500, chiseling machine, 600, previous cycle filling body, 700, body to be mined outside the frame. DETAILED DESCRIPTION

[0046] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0047] like Figure 1 , Figure 2 As shown, this embodiment provides a "7"-shaped shield support for mining, which is referred to as a shield support 100 in this embodiment, and includes a top beam 1 parallel to a top plate 300 erected in a mine body, a supporting shield beam 2 perpendicular to the top plate 300, a balancing hydraulic cylinder 3 connected between the top beam 1 and the supporting shield beam 2, a frame moving walking mechanism 4 and a beam support sliding mechanism 5 arranged on the top beam 1, and a telescopic shield mechanism 6 arranged on the supporting shield beam 2. One end of the top beam 1 and the supporting shield beam 2 are hinged, and the angle between the two is adjusted by the balancing hydraulic cylinder 3. The frame moving walking mechanism 4 is arranged on the inner side surface of the top beam 1 away from the supporting shield beam 2, and has the freedom of telescoping relative to the top beam 1, and is used to extend to the top surface of the newly exposed ore body after the ore body at the end of the top beam 1 is mined, so as to provide stable and reliable support for the shield support 100;

[0048] In addition, if Figure 2 , Figure 5As shown, a sliding track 7 extending along the frame moving walking mechanism 4 is arranged on the inner side surface of the top beam 1, the support beam sliding mechanism 5 is arranged on the inner side surface of the top beam 1, is clamped in the sliding track 7, and has the freedom to slide relative to the top beam 1 along the sliding track 7. The setting of the support beam sliding mechanism 5 can be connected with the support beam sliding mechanism 5 on the adjacent shielding support 100 after the main body of the shielding support 100 is erected, so that when the frame moving walking mechanism 4 or the telescopic shielding mechanism 6 of a certain shielding support 100 temporarily loses its supporting point due to the mining of the supporting point with the ore body, it can obtain fixed support through the connection with other shielding supports 100 on both sides to prevent it from falling from the supporting position; at the same time, the shielding support 100 can also use the comprehensive movement of the frame moving walking mechanism 4 and the support beam sliding mechanism 5 to realize the frame moving without dismantling or moving the frame, which saves the time of dismantling or moving the frame and greatly improves the mining efficiency of the metal ore body;

[0049] One end of the balancing hydraulic cylinder 3 is hinged to the inner side of the top beam 1, and the other end is hinged to the inner side of the supporting shielding beam 2. The top beam 1 has the freedom to swing around the hinge axis with the supporting shielding beam 2 and adjust the angle under the drive of the balancing hydraulic cylinder 3. Under the drive of the balancing hydraulic cylinder 3, the top beam 1 has the freedom to open and close relative to the supporting shielding beam 2.

[0050] The telescopic shielding mechanism 6 is arranged on the inner side surface of the supporting shielding beam 2, and has the freedom to retract relative to the lower end of the supporting shielding beam 2. It is used to tighten the tunnel floor 18 after the shielding bracket 100 is erected, so that the space below the top beam 1 and the supporting shielding beam 2 constitutes a stable and safe mining space within the frame.

[0051] Specifically, Figure 2 , Figure 3 and Figure 5 As shown, the frame moving walking mechanism 4 includes a foot beam 8 and a walking hydraulic cylinder 9. The top beam 1 is box-shaped, and a telescopic groove 21 is opened on the side of the top beam 1 for storing the retracted foot beam 8 into its internal space. One end of the foot beam 8 is inserted into the telescopic groove 21 and is gap-matched with the telescopic groove 21, and the other end extends out of the top beam 1 for contacting the supporting point of the ore body in the tunnel. There are two walking hydraulic cylinders 9, and the two ends of the two walking hydraulic cylinders 9 are respectively hinged to the top beam 1 and the foot beam 8 extending out of the top beam 1 through a hinge seat A.

[0052] In addition, the joist sliding mechanism 5 is arranged in the middle of the top beam 1, and the travel hydraulic cylinder 9 is symmetrically arranged on both sides of the joist sliding mechanism 5, wherein the joist sliding mechanism 5 includes a joist 11, a slide 12, a joist connecting lock 13, and a joist hydraulic cylinder 14, the slide 12 is M-shaped, the number of the sliding rails 7 is two, and the top two sides of the slide 12 are clamped in the sliding rails 7 and have the freedom to slide relative to the sliding rails 7;

[0053] At the same time, the joist 11 is in a rectangular shape and is pressed and arranged on the bottom surface of the slide 12 by a joist connecting lock 13. The joist connecting lock 13 is in a pin shape and is threadedly connected to the slide 12. The joist 11 has the freedom to be pressed and loosened relative to the slide 12 and to swing around the axis of the joist connecting lock 13 under the adjustment of the joist connecting lock 13. The two ends of the joist 11 are concave-convex structures that can cooperate with each other. Two or more pin holes are provided on the side of the concave-convex structure of the joist 11. After the multiple shielding brackets 100 are fitted through the concave-convex structures of two adjacent joists 11, the pins are inserted from the side to connect them as a whole. When connecting with the support beam 11 of the adjacent shielding support 100, in order to enable the adjacent shielding support 100 to be connected through the support beam 11 while adapting to the distribution angle and height of the roof 300 in the tunnel, the angle of the support beam 11 can be fine-tuned by adjusting the support beam connection lock 13; the support beam hydraulic cylinder 14 is arranged between the two sliding rails 7, and its two ends are respectively arranged on one end of the top beam 1 close to the foot beam 8 and on the sliding seat 12 through the hinge seat B.

[0054] Further, such as Figure 2 , Figure 4 As shown, the telescopic shielding mechanism 6 includes a telescopic shielding beam 15, a telescopic shielding hydraulic cylinder 16, and a spring tensioning mechanism. The supporting shielding beam 2 includes a supporting shielding beam body 17. The telescopic shielding beam 15 is arranged on the inner side surface of the supporting shielding beam body 17, and a bottom plate 18 is arranged on the side extending out of the supporting shielding beam body 17. One end of the telescopic shielding hydraulic cylinder 16 is fixed on the supporting shielding beam body 17, and the other end points to the bottom plate 18. The spring compression mechanism is a spring tensioning mechanism. The two ends of the spring tensioning mechanism are respectively fixed on the inner side surfaces of the supporting shielding beam body 17 and the telescopic shielding beam 15, so as to ensure the compression state between the telescopic shielding beam 15 and the supporting shielding beam body 17 and improve the stability of the support. When the telescopic shielding hydraulic cylinder 16 is retracted to its original position, the spring tensioning mechanism is in a tensioning state.

[0055] In addition, in order to protect the telescopic shielding hydraulic cylinder 16 and the spring tensioning mechanism at the bottom of the supporting shielding beam 17 and the telescopic shielding beam 15, the supporting shielding beam 2 also includes wide guard plates arranged on both sides of the supporting shielding beam 17, and a bottom guard plate 20 is arranged outside the bottom plate 18 of the supporting shielding beam 17. The number of the telescopic shielding hydraulic cylinders 16 is two, and the telescopic shielding hydraulic cylinders 16 are symmetrically arranged on the inner side surface of the supporting shielding beam 17 and adjacent to the wide guard plates. The spring tensioning mechanism includes a spring tensioning sleeve 19, and the fixed end and the telescopic end of the spring tensioning sleeve 19 are respectively fixed to the supporting shielding beam 17 and the telescopic shielding beam 15.

[0056] Based on the structure of a "7"-shaped shield support for mining provided in this embodiment, this embodiment also provides a method for moving a "7"-shaped shield support for mining, which specifically includes the following steps:

[0057] S1, multiple mining "7" shaped shielding supports 100 are set up in the tunnel, such as Figure 7 As shown, adjacent mining "7"-shaped shielding supports 100 are connected and supported by the two ends of the support beam 11, all the travel hydraulic cylinders 9 and the support beam hydraulic cylinders 14 are in place, the telescopic shielding hydraulic cylinder 16 is extended to drive the telescopic shielding beam 15 to press against the tunnel bottom plate 18, and the chiseling machine 500 is used to mine the ore body 200 that can be mined in the frame and the ore body 700 to be mined outside the frame, as shown in FIG. Figure 6 a, where Figure 6 The upper part of the ore body 700 to be mined outside the frame in a is the filling body 600 of the previous cycle. During the mining process, the travel hydraulic cylinder 9 pressurizes and controls the foot beam 8 to continuously extend and tighten along with the top of the newly exposed ore body to be mined, until the mining area in the frame completes the height of a mining cycle, the foot beam 8 extends to the full position, and the travel distance is L. At this time, the support beam 11 is in the initial position relative to the top beam 1, as shown in FIG. Figure 6 As shown in b;

[0058] S2, such as Figure 6 As shown in Figs. c and 6d, after the single telescopic shielding hydraulic cylinder 16 is controlled to reduce pressure to drive the telescopic shielding beam 15 to retract and separate from the tunnel floor 18, the traveling hydraulic cylinder 9 is decompressed to drive the foot beam 8 to retract 1 / 2L of travel distance. At the same time, the supporting beam hydraulic cylinder 14 is extended to push the main body of the mining "7"-shaped shielding support 100 to move 1 / 2L of travel distance in the direction of the foot plate 10. Then, the telescopic shielding hydraulic cylinder 16 is controlled to increase pressure to drive the telescopic shielding beam 15 to extend to press against the tunnel floor 18. At this time, the mining "7"-shaped shielding support 100 is moved forward 1 / 2L of travel distance.

[0059] S3, loop step S2 until all mining "7" shaped shielding supports 100 move forward 1 / 2L travel distance, such as Figure 6 As shown in e;

[0060] S4, control the hydraulic cylinders 14 of all the "7"-shaped shielding supports 100 for mining to retract and pull the interconnected beams 11 back to their initial positions relative to their own top beams 1, such as Figure 6 f shown;

[0061] S5, after controlling the telescopic shield hydraulic cylinder 16 to reduce pressure and drive the telescopic shield beam 15 to retract and separate from the tunnel floor 18, controlling the walking hydraulic cylinder 9 to reduce pressure and drive the foot beam 8 to retract the remaining 1 / 2L of the travel distance, at the same time, the supporting beam hydraulic cylinder 14 extends and pushes the main body of the mining "7"-shaped shield support 100 to move 1 / 2L of the travel distance in the direction of the foot plate 10. Figure 6 g, and then control the telescopic shield hydraulic cylinder 16 to pressurize and drive the telescopic shield beam 15 to extend to the top of the tunnel floor 18. At this time, the travel hydraulic cylinder 9 shrinks to its original position, and the total forward movement distance L of the mining "7"-shaped shield support 100 returns to the initial state. Figure 6 As shown in h;

[0062] S6, looping step S5 until all mining "7"-shaped shielding supports 100 move forward the remaining 1 / 2L travel distance and then return to the initial state;

[0063] S7, carry out the next cycle of ore body mining and the rack transfer of steps S1 to S6.

[0064] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A "7" shaped shield support for mining, characterized in that: It comprises a top beam (1) parallel to a top plate (300) erected in a mine body, a supporting shielding beam (2) perpendicular to the top plate (300), a balancing hydraulic cylinder (3) connected between the top beam (1) and the supporting shielding beam (2), a frame moving walking mechanism (4) and a beam support sliding mechanism (5) arranged on the top beam (1), and a telescopic shielding mechanism (6) arranged on the supporting shielding beam (2), wherein one end of the top beam (1) and the supporting shielding beam (2) are hinged, and the frame moving walking mechanism (4) is arranged on a side of the inner side surface of the top beam (1) away from the supporting shielding beam (2), and has the freedom to telescope relative to the top beam (1); A sliding track (7) extending along the frame moving walking mechanism (4) is arranged on the inner side surface of the top beam (1); the supporting beam sliding mechanism (5) is arranged on the inner side surface of the top beam (1), is clamped in the sliding track (7), and has the freedom to slide along the sliding track (7) relative to the top beam (1); One end of the balancing hydraulic cylinder (3) is hinged to the inner side surface of the top beam (1), and the other end is hinged to the inner side surface of the supporting shielding beam (2); the top beam (1) has the freedom to swing around the hinge axis with the supporting shielding beam (2) under the drive of the balancing hydraulic cylinder (3); The telescopic shielding mechanism (6) is arranged on the inner side surface of the supporting shielding beam (2) and has the freedom to retract relative to the lower end of the supporting shielding beam (2).

2. A "7" shaped shield support for mining according to claim 1, characterized in that: The frame moving walking mechanism (4) comprises a foot beam (8) and a walking hydraulic cylinder (9); the top beam (1) is box-shaped; a telescopic groove (21) is provided on the side of the top beam (1); one end of the foot beam (8) is inserted into the telescopic groove (21) and is clearance-matched with the telescopic groove (21); the other end extends out of the top beam (1); and the two ends of the walking hydraulic cylinder (9) are respectively hinged to the top beam (1) and the part of the foot beam (8) extending out of the top beam (1) through an articulated seat A.

3. A "7" shaped shield support for mining according to claim 1, characterized in that: The joist sliding mechanism (5) comprises a joist (11), a slide seat (12), a joist connecting lock (13), and a joist hydraulic cylinder (14); the top of the slide seat (12) is clamped in the sliding track (7) and has the freedom to slide relative to the sliding track (7); The joist (11) is in a rectangular parallelepiped shape and is pressed and arranged on the bottom surface of the slide seat (12) by a joist coupling lock (13). The joist coupling lock (13) is in a pin-shaped shape and is threadedly connected to the slide seat (12). The joist (11) has the freedom to be pressed and released relative to the slide seat (12) and to swing around the axis of the joist coupling lock (13) under the adjustment of the joist coupling lock (13); The two ends of the support beam hydraulic cylinder (14) are respectively arranged on one end of the top beam (1) close to the foot beam (8) and on the sliding seat (12) through a hinge seat B.

4. A "7" shaped shield support for mining according to claim 1, characterized in that: The telescopic shielding mechanism (6) comprises a telescopic shielding beam (15), a telescopic shielding hydraulic cylinder (16), and a spring tensioning mechanism; the supporting shielding beam (2) comprises a supporting shielding beam body (17); the telescopic shielding beam (15) is arranged on the inner side surface of the supporting shielding beam body (17); a bottom plate (18) is arranged on the side extending out of the supporting shielding beam body (17); one end of the telescopic shielding hydraulic cylinder (16) is fixed on the supporting shielding beam (2) and the other end points to the bottom plate (18); the spring tensioning mechanism is a spring tensioning mechanism; the two ends of the spring tensioning mechanism are respectively fixed on the inner side surfaces of the supporting shielding beam body (17) and the telescopic shielding beam (15); when the telescopic shielding hydraulic cylinder (16) is retracted to its original position, the spring tensioning mechanism is in a tensioned state.

5. A "7" shaped shield support for mining according to claim 2, characterized in that: The number of the traveling hydraulic cylinders (9) is two, the supporting beam sliding mechanism (5) is arranged in the middle of the top beam (1), and the traveling hydraulic cylinders (9) are symmetrically arranged on both sides of the supporting beam sliding mechanism (5).

6. A "7" shaped shield support for mining according to claim 3, characterized in that: The two ends of the support beam (11) are concave-convex structures that can cooperate with each other, and two or more pin holes are provided on the side of the concave-convex structure of the support beam (11). A plurality of "7"-shaped shielding brackets (100) for mining are connected as a whole through the cooperation of the concave-convex structures of two adjacent support beams (11) and the pin shafts.

7. A "7" shaped shield support for mining according to claim 4, characterized in that: The supporting shielding beam (2) further comprises wide guard plates arranged on both sides of the supporting shielding beam body (17); the number of the telescopic shielding hydraulic cylinders (16) is two, and the telescopic shielding hydraulic cylinders (16) are symmetrically arranged on the inner side surface of the supporting shielding beam body (17) and adjacent to the wide guard plates.

8. The "7" shaped shield support for mining according to claim 4 is characterized by: The spring tensioning mechanism comprises a spring tensioning sleeve (19), wherein a fixed end and a telescopic end of the spring tensioning sleeve (19) are respectively fixed on the supporting shielding beam body (17) and the telescopic shielding beam (15).

9. A "7" shaped shield support for mining according to claim 4, characterized in that: A bottom protection plate (20) is arranged outside the bottom plate (18) supporting and protecting the beam body (17).

10. A method for moving a "7"-shaped shield support for mining according to any one of claims 1 to 9, characterized in that: It includes the following steps, S1, multiple "7"-shaped shielding supports (100) for mining are erected in the tunnel, and adjacent "7"-shaped shielding supports (100) for mining are mutually connected and supported by the two ends of the supporting beam (11), all the travel hydraulic cylinders (9) and the supporting beam hydraulic cylinders (14) are in place, the telescopic shielding hydraulic cylinders (16) are extended to drive the telescopic shielding beams (15) to press against the tunnel bottom plate (18), and the mining equipment is used to mine the mineable ore body (200) in the frame. During the mining process, the travel hydraulic cylinders (9) are pressurized to control the foot beams (8) to continuously extend and press against the top of the newly exposed ore body to be mined, until the mining area in the frame completes a mining cycle, and the foot beams (8) are extended to the position, and the travel distance is L. At this time, the supporting beams (11) are in the initial position relative to the top beams (1); S2, control a single telescopic shield hydraulic cylinder (16) to reduce pressure and drive the telescopic shield beam (15) to retract and separate from the tunnel floor (18), then the travel hydraulic cylinder (9) reduces pressure and drives the foot beam (8) to retract a 1 / 2L travel distance, at the same time, the support beam hydraulic cylinder (14) extends and pushes the main body of the mining "7"-shaped shield support (100) to move 1 / 2L travel distance in the direction of the foot plate (10), then control the telescopic shield hydraulic cylinder (16) to increase pressure and drive the telescopic shield beam (15) to extend and press against the tunnel floor (18), at this time, the mining "7"-shaped shield support (100) moves forward a 1 / 2L travel distance; S3, looping step S2 until all mining "7" shaped shielding supports (100) are moved forward by 1 / 2L travel distance; S4, controlling the hydraulic cylinders (14) of all the "7"-shaped shielding supports (100) for mining to retract and pull the interconnected beams (11) back to their initial positions relative to their own top beams (1); S5, after controlling the telescopic shielding hydraulic cylinder (16) to reduce pressure and drive the telescopic shielding beam (15) to retract and separate from the tunnel floor (18), controlling the traveling hydraulic cylinder (9) to reduce pressure and drive the foot beam (8) to recover the remaining 1 / 2L of travel distance, at the same time, the supporting beam hydraulic cylinder (14) extends and pushes the main body of the mining "7"-shaped shielding support (100) to move 1 / 2L of travel distance in the direction of the foot plate (10), and then controlling the telescopic shielding hydraulic cylinder (16) to increase pressure and drive the telescopic shielding beam (15) to extend and press against the tunnel floor (18), at this time, the traveling hydraulic cylinder (9) retracts to the original position, and the mining "7"-shaped shielding support (100) moves forward a total travel distance L and returns to the initial state; S6, looping step S5 until all mining "7"-shaped shielding supports (100) move forward the remaining 1 / 2L travel distance and then return to the initial state; S7, carry out the next cycle of ore body mining and the rack transfer of steps S1 to S6.

Images