A "7" shape shield support for mining and a method for moving the shield support

Abstract

The application provides a "7" shape shield support for mining, which comprises a top beam parallel to the roof in the ore body, a support shield beam vertical to the roof, a balance hydraulic cylinder connected between the top beam and the support shield beam, a support walking mechanism arranged on the top beam, a support sliding mechanism, and an extension shield mechanism arranged on the support shield beam, one end of the top beam and the support shield beam is hinged, the support walking mechanism is arranged on the inner side of the top beam away from the support shield beam, and has the freedom of extension relative to the top beam; the inner side of the top beam is provided with a sliding track extending along the support walking mechanism, the support sliding mechanism is arranged on the inner side of the top beam, is clamped in the sliding track, and has the freedom of sliding along the sliding track relative to the top beam; one end of the balance hydraulic cylinder is hinged with the support sliding mechanism, the other end is hinged with the inner side of the support shield beam, and the top beam has the freedom of swinging around the hinged shaft with the support shield beam under the driving of the balance hydraulic cylinder.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ore body mining device, and relates to a shield support for mining and a method for moving the shield support, in particular to a "7"-shaped shield support for mining and a method for moving the shield support. BACKGROUND

[0002] Coal mines belong to sedimentary rocks, which have good continuity in left and right and front and back and large block segments. In the mining method of coal mines, the horizontal mining method is mostly used. In the sedimentary rocks, the continuity is good and continuous moving of the shield support is not needed. Metal veins belong to igneous rocks, which are gradually formed with volcanic eruption or crustal extrusion. The metal veins have strong continuity in up and down, poor continuity in left and right and front and back, small block segments, and are mostly inclined downward or upward. When the traditional horizontal mining method and the shield support are applied in the metal veins, continuous moving of the shield support is needed, the work load is extremely large, and the mining efficiency is low. Moreover, the traditional shield support is mostly suitable for horizontal mining. When the traditional shield support is applied in the mining of the metal veins, the shield space formed below the shield support is not practical in the mining of the metal veins, and the stability of the support is poor in the mining process.

[0003] Therefore, it is necessary to provide a shield support which is suitable for inclined downward mining in the metal veins with strong continuity in up and down, and can provide reliable and stable support and facilitate moving of the shield support. SUMMARY

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

[0005] To achieve the above-mentioned purpose, the specific technical solutions of the present application are as follows.

[0006] A "7"-shaped shield support for mining comprises a top beam parallel to a roof installed in an ore body, a support shield beam perpendicular to the roof, a balance hydraulic cylinder connected between the top beam and the support shield beam, a moving support walking mechanism and a support beam sliding mechanism arranged on the top beam, and an extension shield mechanism arranged on the support shield beam. One end of the top beam and the support shield beam is hinged. The moving support walking mechanism is arranged on the inner side of the top beam away from the support shield beam, and has a degree of freedom of extension relative to the top beam.

[0007] A sliding track extending along the moving support walking mechanism is arranged on the inner side of the top beam. The support beam sliding mechanism is arranged on the inner side of the top beam, clamped in the sliding track, and has a degree of freedom of sliding along the sliding track relative to the top beam.

[0008] One end of the balance hydraulic cylinder is hinged to the inner side of the top beam, and the other end is hinged to the inner side of the support shield beam, the top beam has a degree of freedom of swinging around the hinge shaft of the support shield beam under the driving of the balance hydraulic cylinder;

[0009] The telescopic shield mechanism is arranged on the inner side of the support shield beam and has a degree of freedom of contraction relative to the lower end of the support shield beam.

[0010] The walking mechanism includes foot beams and walking hydraulic cylinders, the top beam is in the shape of a box, the side surface of the top beam is provided with a telescopic slot, one end of the foot beam is inserted into the telescopic slot and gap-fitted with the telescopic slot, and the other end of the foot beam is extended out of the top beam, and the two ends of the walking hydraulic cylinder are respectively hinged to the top beam and the foot beam extended out of the top beam through a hinge seat A.

[0011] The support beam sliding mechanism includes a support beam, a sliding seat, a support beam connecting lock, and a support beam hydraulic cylinder, the top of the sliding seat is clamped in the sliding rail and has a degree of freedom of sliding relative to the sliding rail;

[0012] The support beam is in the shape of a rectangular parallelepiped and is arranged on the bottom surface of the sliding seat by being pressed by the support beam connecting lock, the support beam connecting lock is in the shape of a pin shaft and is threadedly connected with the sliding seat, and the support beam has degrees of freedom of being pressed against the sliding seat, being loosened, and swinging around the axis of the support beam connecting lock under the adjustment of the support beam connecting 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 the sliding seat through a hinge seat B.

[0014] The telescopic shield mechanism includes a telescopic shield beam, a telescopic shield hydraulic cylinder, and a spring tensioning mechanism, the support shield beam includes a support shield beam body, the telescopic shield beam is arranged on the inner side of the support shield beam body and is provided with a bottom plate on one side extended out of the support shield beam body, one end of the telescopic shield hydraulic cylinder is fixed on the support shield beam and the other end points to the bottom plate, the spring tensioning mechanism is a spring stretching mechanism, the two ends of the spring tensioning mechanism are respectively fixed on the inner sides of the support shield beam body and the telescopic shield beam, and when the telescopic shield hydraulic cylinder is contracted to the original position, the spring tensioning mechanism is in a stretched state.

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

[0016] The two ends of the support beam are concave-convex structures that can be matched with each other, two or more pin holes are arranged on the side surfaces of the concave-convex structures of the support beam, and multiple mining “7”-shaped shield supports are connected into one body through the matching of the concave-convex structures of adjacent two support beams and the pin shafts.

[0017] The support shield beam further comprises wide guard plates arranged on both sides of the support shield beam body, and the number of the telescopic shield hydraulic cylinders is two, which are symmetrically arranged on the inner side of the support shield beam body and adjacent to the wide guard plates.

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

[0019] The bottom plate of the support shield beam body is provided with a bottom guard plate outside.

[0020] A moving method of a mining "7" shape shield support, comprising the following steps,

[0021] S1, a plurality of mining "7" shape shield supports are erected in the roadway, the two ends of the joists are connected and supported with each other between adjacent mining "7" shape shield supports, all walking hydraulic cylinders and joist hydraulic cylinders are in situ, the telescopic shield hydraulic cylinder is extended to drive the telescopic shield beam to tightly press the roadway bottom plate, the mining equipment is used to mine the mineable ore body in the frame, in the mining process, the walking hydraulic cylinder is pressurized to control the foot beam to continuously extend and tightly press the top of the newly exposed mine to be mined, until the foot beam is extended to the position after the mining area in the frame completes a mining cycle height, the travel distance is L, at this time, the joist is relative to the top beam at the initial position;

[0022] S2, after the telescopic shield hydraulic cylinder is controlled to reduce the pressure to drive the telescopic shield beam to be retracted and separated from the roadway bottom plate, the walking hydraulic cylinder is controlled to reduce the pressure to drive the foot beam to be retracted by 1 / 2L travel distance, at the same time, the joist hydraulic cylinder is controlled to extend to drive the mining "7" shape shield support body to move in the direction of the foot plate by 1 / 2L travel distance, and then the telescopic shield hydraulic cylinder is controlled to pressurize to drive the telescopic shield beam to extend and tightly press the roadway bottom plate, at this time, the mining "7" shape shield support is moved forward by 1 / 2L travel distance;

[0023] S3, the step S2 is repeated until all the mining "7" shape shield supports are moved forward by 1 / 2L travel distance.

[0024] S4, the joist hydraulic cylinders of all the mining "7" shape shield supports are controlled to retract to drive the connected joists to return to the initial position relative to the top beam thereof.

[0025] S5, after the telescopic shield hydraulic cylinder is controlled to reduce pressure to drive the telescopic shield beam to be retracted and separated from the roadway floor, the walking hydraulic cylinder is controlled to reduce pressure to drive the foot beam to be retracted by the remaining 1 / 2L stroke distance, at the same time, the support beam hydraulic cylinder is controlled to drive the mining "7" shaped shield support body to move 1 / 2L stroke distance in the direction of the foot plate, and then the telescopic shield hydraulic cylinder is controlled to be pressurized to drive the telescopic shield beam to be extended to the roadway floor, at this time, the walking hydraulic cylinder is retracted to the original position, the total mining "7" shaped shield support moves L stroke distance forward to return to the initial state;

[0026] S6, after the remaining 1 / 2L stroke distance of the mining "7" shaped shield support is moved forward to return to the initial state in the cycle of steps S5, the next cycle of ore body mining and steps S1-S6 is performed.

[0027] S7, the next cycle of ore body mining and steps S1-S6 is performed.

[0028] The mining "7" shaped shield support and the moving method have the advantages that the shield support is arranged in the "7" shape, the moving mechanism and the support beam sliding mechanism are arranged on the top beam, the adjacent two shield supports are connected by the support beam sliding mechanism to form a whole, the telescopic shield mechanism is arranged on the support shield beam, the top end of the top beam under the mining area in the shield is mined, the connection of the support beam sliding mechanism and the adjacent shield support provides stable lifting for the top beam, the moving mechanism is gradually controlled to extend during the mining process, the top surface of the newly mined ore body is constantly pressed, the lower end of the top beam is effectively supported, and the stability of the shield support during the mining process is effectively improved.

[0029] In addition, the moving mechanism and the support beam sliding mechanism cooperate to move the shield without disassembling the connection between the shield supports and the support beams after each mining cycle is completed, the shield does not need to be disassembled and moved, the workload is greatly reduced, time is effectively saved, the continuity of the metal vein mining is improved, and the mining efficiency is significantly improved.

[0030] The structure of the shield support and the moving method can well adapt to the extension mode of the metal vein, provide reliable, stable and continuous support for the inclined downward mining of the metal vein, provide sufficient safety basis for the efficient mining of the metal vein, and are suitable for popularization and application in the metal vein formed by igneous rock. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0033] Figure 3 is a partial enlarged view of A in the figure; Figure 2

[0034] Figure 4 is a left view of the present application;

[0035] Figure 5 is a bottom view of the present application;

[0036] Figure 6 a is a state diagram of the initial support state of the shield support in step S1 of the present application;

[0037] Figure 6 b is a state diagram of the foot beam of the shield support in step S1 of the present application;

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

[0039] Figure 6 d is a state diagram of the shield support in step S2 of the present application when it is moved forward by 1 / 2L of the stroke distance;

[0040] Figure 6 e is a state diagram of all the shield supports in step S3 of the present application when they are moved forward by 1 / 2L of the stroke distance;

[0041] Figure 6 f is a state diagram of all the shield supports in step S4 of the present application when they are moved back to the initial position relative to the top beam;

[0042] Figure 6 g is a state diagram of the shield support in step S5 of the present application when it is moved forward by the remaining 1 / 2L of the stroke distance;

[0043] Figure 6 h is a state diagram of the shield support in step S5 of the present application when it is moved forward by L of the stroke distance and returns to the initial state;

[0044] Figure 7 is a schematic diagram of the shield support in the metal vein of the present application.

[0045] ​Marked description in the figure: 1, top beam, 2, support shield beam, 3, balance hydraulic cylinder, 4, moving frame walking mechanism, 5, support beam sliding mechanism, 6, telescopic shield mechanism, 7, sliding rail, 8, foot beam, 9, walking hydraulic cylinder, 10, foot plate, 11, support beam, 12, sliding seat, 13, support beam coupling lock, 14, support beam hydraulic cylinder, 15, telescopic shield beam, 16, telescopic shield hydraulic cylinder, 17, support shield beam body, 18, bottom plate, 19, spring tension sleeve, 20, bottom protection plate, 21, telescopic groove, 100, shield support, 200, mineable ore body in the frame, 300, roof, 500, drill, 600, last cycle filling body, 700, ore body to be mined outside the frame. DETAILED DESCRIPTION

[0046] In order to better understand the purpose, structure and function of the present application, the present application will be further described in detail below in combination with the drawings.

[0047] As Figure 1 , Figure 2 shown, the present embodiment provides a mining "7" shaped shield support, which is simply referred to as shield support 100 in the present embodiment, which comprises a top beam 1 parallel to the roof 300 erected in the ore body, a support shield beam 2 perpendicular to the roof 300, a balance hydraulic cylinder 3 connected between the top beam 1 and the support shield beam 2, a moving frame walking mechanism 4 and a support beam sliding mechanism 5 provided on the top beam 1, and a telescopic shield mechanism 6 provided on the support shield beam 2, one end of the top beam 1 and the support shield beam 2 is hinged, the included angle between the two is adjusted by the balance hydraulic cylinder 3, the moving frame walking mechanism 4 is provided on the inner side of the top beam 1 away from the support shield beam 2, has the freedom of extension and retraction relative to the top beam 1, and is used to extend to the newly exposed ore body top surface after the ore body at the end of the top beam 1 is mined, to provide stable and reliable support for the shield support 100;

[0048] In addition, as Figure 2 , Figure 5As shown, the inner side of the top beam 1 is provided with a sliding track 7 extending along the jumbo walking mechanism 4, and the joist sliding mechanism 5 is arranged on the inner side of the top beam 1, clamped in the sliding track 7, and has the freedom of sliding along the sliding track 7 relative to the top beam 1. After the shield support 100 is erected, the joist sliding mechanism 5 on the adjacent shield support 100 can be connected to each other, so that when the jumbo walking mechanism 4 or the telescopic shield mechanism 6 of a certain shield support 100 loses the support point because the support point of the ore body is mined, the fixed support is obtained through the connection with the other shield supports 100 on both sides, so as to avoid falling from the supporting position; at the same time, the shield support 100 can also realize the jumbo walking under the premise of not disassembling and moving the jumbo by using the comprehensive movement of the jumbo walking mechanism 4 and the joist sliding mechanism 5, thereby saving the time of disassembling and moving the jumbo, and greatly improving the mining efficiency of the metal ore body.

[0049] One end of the balance 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 support shield beam 2. The top beam 1 has the freedom of swinging around the hinge shaft of the support shield beam 2 and adjusting the angle under the driving of the balance hydraulic cylinder 3. Under the driving of the balance hydraulic cylinder 3, the top beam 1 has the freedom of opening and buckling relative to the support shield beam 2.

[0050] The telescopic shield mechanism 6 is arranged on the inner side of the support shield beam 2 and has the freedom of shrinking relative to the lower end of the support shield beam 2, which is used to tighten the roadway floor 18 after the shield support 100 is erected, so that the space below the top beam 1 and the support shield beam 2 forms a stable and safe mining space in the frame.

[0051] Specifically, as shown in Figure 2 , Figure 3 and Figure 5 , the jumbo walking mechanism 4 includes a foot beam 8 and a walking hydraulic cylinder 9. The top beam 1 is in the form of a box, and the side surface of the top beam 1 is provided with a telescopic groove 21 for accommodating the retracted foot beam 8. One end of the foot beam 8 is inserted into the telescopic groove 21 and gap-fitted with the telescopic groove 21, and the other end of the foot beam 8 is extended out of the top beam 1 and used to contact the support point of the ore body in the roadway. The number of the walking hydraulic cylinders 9 is two, and the two ends of the two walking hydraulic cylinders 9 are respectively hinged to the top beam 1 and the foot beam 8 extended out of the top beam 1 through a hinge seat A.

[0052] Further, the joist sliding mechanism 5 is arranged in the middle of the roof beam 1, and the walking hydraulic cylinders 9 are symmetrically arranged on both sides of the joist sliding mechanism 5, wherein the joist sliding mechanism 5 comprises a joist 11, a sliding seat 12, a joist coupling lock 13, and a joist hydraulic cylinder 14, the sliding seat 12 is in the shape of M, the number of the sliding tracks 7 is two, and the top of the sliding seat 12 is clamped on both sides of the sliding tracks 7 and has the freedom of sliding relative to the sliding tracks 7;

[0053] Meanwhile, the joist 11 is in the shape of a cuboid, is arranged on the bottom surface of the sliding seat 12 by being pressed by the joist coupling lock 13, the joist coupling lock 13 is in the shape of a pin shaft and is threadedly connected with the sliding seat 12, the joist 11 has the freedom of being pressed and loosened relative to the sliding seat 12 under the adjustment of the joist coupling lock 13 and of swinging around the shaft center of the joist coupling lock 13, the two ends of the joist 11 are in the matching concave-convex structure, two or more pin holes are arranged on the side surface of the concave-convex structure of the joist 11, and multiple shield supports 100 are connected into an integrated whole by being embedded in the concave-convex structure of the adjacent two joists 11 and then being inserted into the pin shaft from the side surface. When the joist 11 of the adjacent shield support 100 is connected, in order to enable the adjacent shield support 100 to be connected by the joist 11 under the condition of adapting to the distribution angle and height of the roof 300 in the roadway, the angle of the joist 11 can be finely adjusted by adjusting the joist coupling lock 13; the joist hydraulic cylinder 14 is arranged between the two sliding tracks 7, and the two ends thereof are arranged on one end of the roof beam 1 close to the foot beam 8 and on the sliding seat 12 through the hinged seat B.

[0054] Further, as shown in Figure 2 、 Figure 4 the telescopic shield mechanism 6 comprises a telescopic shield beam 15, a telescopic shield hydraulic cylinder 16, and a spring tensioning mechanism, the support shield beam 2 comprises a support shield beam body 17, the telescopic shield beam 15 is arranged on the inner side of the support shield beam body 17, the side of the support shield beam body 17 extending out is provided with a bottom plate 18, one end of the telescopic shield hydraulic cylinder 16 is fixed on the support shield beam body 17, and the other end thereof points to the bottom plate 18, the spring tensioning mechanism is a spring stretching mechanism, the two ends of the spring tensioning mechanism are respectively fixed on the inner sides of the support shield beam body 17 and the telescopic shield beam 15, for ensuring the pressed state between the telescopic shield beam 15 and the support shield beam body 17 and improving the stability of the support, and when the telescopic shield hydraulic cylinder 16 is contracted to the original position, the spring tensioning mechanism is in the stretching state.

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

[0056] On the basis of the structure of the "7"-shaped shield support for mining provided in the embodiment, the embodiment further provides a moving method of the "7"-shaped shield support for mining, which specifically comprises the following steps,

[0057] S1, a plurality of "7"-shaped shield supports for mining 100 are erected in the roadway, as shown in Figure 7 , the two ends of the joist 11 are connected and supported with each other between the adjacent "7"-shaped shield supports for mining 100, all the walking hydraulic cylinders 9 and the joist hydraulic cylinders 14 are located in the original position, the telescopic shield hydraulic cylinder 16 drives the telescopic shield beam 15 to tightly press the roadway bottom plate 18, and the drill machine 500 is used to mine the mine body 200 in the frame and the to-be-mined mine body 700 outside the frame, as shown in Figure 6 a, wherein Figure 6 In a, the upper part of the to-be-mined mine body 700 outside the frame is the last cycle filling body 600, in the mining process, the walking hydraulic cylinder 9 is controlled to pressurize, so that the foot beam 8 continuously extends and tightly presses the top of the newly exposed to-be-mined mine body, until the foot beam 8 extends to the position after the height of the mining area in the frame completes a mining cycle, the travel distance is L, at this time, the joist 11 is relative to the top beam 1 at the initial position, as shown in Figure 6 b;

[0058] S2, as shown in Figure 6 c, 6d, after the single telescopic shield hydraulic cylinder 16 is controlled to decompress and drives the telescopic shield beam 15 to retract and separate from the roadway bottom plate 18, the walking hydraulic cylinder 9 is controlled to decompress and drives the foot beam 8 to retract by 1 / 2L travel distance, at the same time, the joist hydraulic cylinder 14 is controlled to pressurize and drives the "7"-shaped shield support for mining 100 to move by 1 / 2L travel distance in the direction of the foot plate 10, and then the telescopic shield hydraulic cylinder 16 is controlled to pressurize and drives the telescopic shield beam 15 to tightly press the roadway bottom plate 18, at this time, the "7"-shaped shield support for mining 100 moves forward by 1 / 2L travel distance;

[0059] S3, the step S2 is repeated until all the "7"-shaped shield supports for mining 100 move forward by 1 / 2L travel distance, as shown in Figure 6 e;

[0060] S4, controls the hydraulic cylinders 14 of all mining “7”-shaped shield supports 100 to retract, pulling the interconnected support beams 11 back to their initial positions relative to their own top beams 1, such as... Figure 6 As shown in f;

[0061] S5, after the control hydraulic cylinder 16 depressurizes and causes the telescopic shield beam 15 to retract and separate from the roadway floor 18, the control hydraulic cylinder 9 depressurizes and causes the foot beam 8 to retract the remaining 1 / 2L of its travel distance. At the same time, the support hydraulic cylinder 14 extends and pushes the main body of the mining "7"-shaped shield support 100 to move 1 / 2L of its travel distance towards the foot plate 10. Figure 6 g, then control the telescopic shield hydraulic cylinder 16 to pressurize and drive the telescopic shield beam 15 to extend and tighten against the roadway floor 18. At this time, the traveling hydraulic cylinder 9 retracts to its original position, and the mining "7"-shaped shield support 100 moves forward a total distance L, returning to the initial state, as if... Figure 6 As shown in h;

[0062] S6, repeat step S5 until all mining “7” shaped shield supports 100 have moved forward the remaining 1 / 2L of their travel distance, then return to the initial state;

[0063] S7, proceed with the next cycle of ore body mining and the transfer of supports in steps S1 to S6.

[0064] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A "7" shaped shield support for mining, characterized in that: It includes a top beam (1) parallel to the top plate (300) erected in the ore body, a support shield beam (2) perpendicular to the top plate (300), a balancing hydraulic cylinder (3) connecting the top beam (1) and the support shield beam (2), a frame-shifting walking mechanism (4) and a beam-sliding mechanism (5) set on the top beam (1), and a telescopic shield mechanism (6) set on the support shield beam (2). One end of the top beam (1) and the support shield beam (2) are hinged. The frame-shifting walking mechanism (4) is set on the inner side of the top beam (1) away from the support shield beam (2) and has the freedom to telescopic relative to the top beam (1). The inner side of the top beam (1) is provided with a sliding track (7) extending along the frame moving mechanism (4). The beam sliding mechanism (5) is provided on the inner side of the top beam (1), is locked in the sliding track (7), and has the freedom to slide relative to the top beam (1) along the sliding track (7). 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 shield beam (2). The top beam (1) has the degree of freedom to swing around the hinge axis with the supporting shield beam (2) under the drive of the balancing hydraulic cylinder (3). The telescopic shield mechanism (6) is located on the inner side of the support shield beam (2) and has the degree of freedom to retract relative to the lower end of the support shield beam (2); The frame-shifting 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 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-fitted with the telescopic groove (21), while the other end extends out of the top beam (1). 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 the hinge seat A. The beam sliding mechanism (5) includes a beam (11), a slide (12), a beam connecting lock (13), and a beam hydraulic cylinder (14). The top of the slide (12) is locked in the sliding track (7) and has the freedom to slide relative to the sliding track (7). The support beam (11) is rectangular and is pressed onto the bottom surface of the slide (12) by a support beam connecting lock (13). The support beam connecting lock (13) is pin-shaped and threadedly connected to the slide (12). The support beam (11) has the freedom to press and release relative to the slide (12) under the adjustment of the support beam connecting lock (13), and to swing around the axis of the support beam connecting lock (13). The two ends of the hydraulic cylinder (14) supporting the beam are respectively mounted on one end of the top beam (1) near the foot beam (8) and on the slide (12) via hinged seats B.

2. The "7" shaped shield support for mining as claimed in claim 1, wherein: The telescopic cover mechanism (6) includes a telescopic cover beam (15), a telescopic cover hydraulic cylinder (16), and a spring tensioning mechanism. The support cover beam (2) includes a support cover beam body (17). The telescopic cover beam (15) is located on the inner side of the support cover beam body (17), and a base plate (18) is provided on the side extending out of the support cover beam body (17). One end of the telescopic cover hydraulic cylinder (16) is fixed on the support cover beam (2), and the other end points to the base 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 sides of the support cover beam body (17) and the telescopic cover beam (15). When the telescopic cover hydraulic cylinder (16) retracts to its original position, the spring tensioning mechanism is in a stretched state.

3. The "7" shaped shield support for mining as claimed in claim 1 wherein: The number of the walking hydraulic cylinders (9) is two, the beam sliding mechanism (5) is located in the middle of the top beam (1), and the walking hydraulic cylinders (9) are symmetrically arranged on both sides of the beam sliding mechanism (5).

4. The "7" shaped shield support for mining as claimed in claim 1 wherein: The two ends of the support beam (11) are interlocking concave and convex structures. Two or more pin holes are opened on the side of the concave and convex structure of the support beam (11). Multiple mining "7" shaped shield supports (100) are connected as one unit by the interlocking concave and convex structures of adjacent two support beams (11) and the pin shaft.

5. The "7" shaped shield support for mining as claimed in claim 4, wherein: The supporting shield beam (2) also includes wide protective plates on both sides of the supporting shield beam body (17). There are two telescopic shield hydraulic cylinders (16). The telescopic shield hydraulic cylinders (16) are symmetrically arranged on the inner side of the supporting shield beam body (17) and adjacent to the wide protective plates.

6. The "7" shaped shield support for mining as claimed in claim 2 wherein: The spring tensioning mechanism includes a spring tensioning sleeve (19), the fixed end and the telescopic end of which are respectively fixed to the supporting shield beam (17) and the telescopic shield beam (15).

7. The "7" shaped shield support for mining as claimed in claim 2 wherein: A bottom plate (20) is provided on the outside of the bottom plate (18) of the supporting shield beam (17).

8. The method according to any one of claims 1-7, wherein the method is a method for moving a "7" shaped shield support for mining, characterized in that: It includes the following steps, S1, multiple mining “7” shaped shield supports (100) are erected in the roadway. The adjacent mining “7” shaped shield supports (100) are connected and supported by the two ends of the support beam (11). All the walking hydraulic cylinders (9) and the support beam hydraulic cylinders (14) are in place. The telescopic shield hydraulic cylinder (16) extends and drives the telescopic shield beam (15) to press against the roadway floor plate (18). The mining equipment is used to mine the mineable ore body (200) in the frame. During the mining process, the walking hydraulic cylinder (9) pressurizes and controls the foot beam (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 the height of one mining cycle. Then the foot beam (8) extends into place with a stroke distance of L. At this time, the support beam (11) is in the initial position relative to the top beam (1). S2, control the single telescopic shield hydraulic cylinder (16) to depressurize and drive the telescopic shield beam (15) to retract and separate from the roadway floor plate (18). Then, the walking hydraulic cylinder (9) depressurizes and drives the foot beam (8) to retract 1 / 2L stroke 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 stroke distance towards the foot plate (10). Then, control the telescopic shield hydraulic cylinder (16) to pressurize and drive the telescopic shield beam (15) to extend and pressurize the roadway floor plate (18). At this time, the mining "7" shaped shield support (100) moves forward 1 / 2L stroke distance. S3, repeat step S2 until all mining "7" shaped shield supports (100) move forward 1 / 2L stroke distance; S4, control the hydraulic cylinders (14) of all mining “7” shaped shield supports (100) to retract and pull the interconnected supports (11) back to their initial positions relative to their own top beams (1); S5, control the pressure reduction of the telescopic shield hydraulic cylinder (16) to drive the telescopic shield beam (15) to retract and separate from the roadway floor plate (18), control the pressure reduction of the travel hydraulic cylinder (9) to drive the foot beam (8) to retract the remaining 1 / 2L travel distance, at the same time, the support beam hydraulic cylinder (14) extends to push the main body of the mining "7" shaped shield support (100) to move 1 / 2L travel distance towards the foot plate (10), then control the pressure of the telescopic shield hydraulic cylinder (16) to drive the telescopic shield beam (15) to extend to pressurize the roadway floor plate (18), at this time, the travel hydraulic cylinder (9) retracts to the original position, the mining "7" shaped shield support (100) moves forward a total distance L, and returns to the initial state; S6, repeat step S5 until all mining "7" shaped shield supports (100) have moved forward for the remaining 1 / 2L of the travel distance and then return to the initial state; S7, proceed with the next cycle of ore body mining and the transfer of supports in steps S1 to S6.

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