Underground metal mine mining roof supporting device and mounting method

Abstract

The invention relates to the technical field of protective equipment, in particular to an underground metal mine mining roof supporting device and an installation method.The underground metal mine mining roof supporting device comprises detachable telescopic supports, a plurality of first sliding blocks are arranged on the left detachable telescopic support and the right detachable telescopic support at intervals from front to back, a cylinder is installed on each first sliding block, and a piston rod is slidably connected into each cylinder; supporting plates are connected to the piston rods through bolts, telescopic top beams are hinged between the two supporting plates which correspond to each other left and right, a left supporting piece and a right supporting piece are connected to the telescopic top beams in a sliding mode, and the supporting pieces are hinged to the first sliding blocks on the same sides. Each supporting plate can independently ascend and descend, each telescopic top beam can independently swing to adjust the angle where the supporting plate is located, and each telescopic top beam can independently stretch and retract to be adjusted so as to adapt to supporting of uneven mine tunnels, the effect of flexible adjustment can be achieved, and therefore the supporting device can adapt to the mine tunnels of different sizes and different shapes; therefore, the risk of local stress concentration can be reduced, and the mining supporting effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of protective equipment, and in particular to an underground metal mine roof support device and an installation method. Background Art

[0002] Underground metal mining refers to the extraction of various metal ores below the Earth's surface. This method is typically used to obtain valuable metal ores such as gold, silver, copper, lead, and zinc. Compared to open-pit mining, underground mining requires more complex engineering techniques and higher safety standards. Proper support is essential during underground mining to ensure miner safety, maintain the stability of the mine structure, prevent surrounding rock instability, protect personnel and equipment, maintain the availability of the working space, optimize mining efficiency, and protect the environment.

[0003] After searching, a Chinese patent with patent announcement number CN112796802B is found, which is a support safety protection equipment for underground mining, including a single arch support member and a fence type connector. The single arch support member includes: a compression column, an inclined support column and a main support column. One end of the inclined support column is hinged to both ends of the compression column, the top of the main support column is hinged to the inclined support column, the bottom end of the compression column is provided with a first rotating seat and a second rotating seat, and the main support column is provided with a third rotating seat; a first component link and a second component link, the link is hinged to the center of the inclined support column, and the other end of the link is hinged to the third rotating seat; an inverted V double link frame, both ends of which are hinged to the support column, and a threaded rod is provided at the top; the fence type connector includes: a vertical screw drive, which is arranged on one side of the main support column; a fence rod, both ends of which are hinged to the vertical screw drive; and a rockfall protection net covering the single arch support member.

[0004] Although the above patent can be adapted to support mine tunnels of different sizes, the above patent still has the following defects in practical application:

[0005] 1. Difficulty in transportation: Due to the large size of the device itself, it is not capable of modular disassembly and transportation, resulting in transportation difficulties.

[0006] 2. Insufficient flexibility: The aforementioned patent uses inclined support columns and top compression columns to support the mine tunnel. However, since the inclined support columns and compression columns cannot be adjusted, they are difficult to adapt to mine tunnels of varying shapes. When faced with unique mine tunnel shapes, the adjustment method of the aforementioned patent may not provide sufficient flexibility. If the support device does not fit the top well, localized stress concentration may occur, thus affecting the support effect. Summary of the Invention

[0007] The purpose of the present invention is to provide an underground metal mine roof support device and an installation method that are easy to disassemble and assemble and can be flexibly adjusted in order to solve the above problems.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] The cam is connected to the support frame of the lifting post by the spring, and the cam is connected to the support frame by the spring.

[0010] Preferably, the detachable telescopic bracket includes a vertical plate, an L-shaped telescopic plate, an I-shaped telescopic plate, a threaded rod and a support block. The vertical plate is provided with two front and rear plates. The inner plate and outer plate of the L-shaped telescopic plate are respectively connected to the upper parts of the two vertical plates by bolts, and the inner plate and outer plate of the I-shaped telescopic plate are respectively connected to the inner plate and outer plate of the L-shaped telescopic plate. The lower part of the vertical plate is threadedly connected to the threaded rod, and the bottom end of the threaded rod passes vertically downward through the bottom of the vertical plate and is rotatably connected to the support block. The sliders at the front end and the rear end are respectively connected to the inner plate and outer plate of the I-shaped telescopic plate by bolts, and the remaining sliders are slidably connected to the I-shaped telescopic plate. The L-shaped telescopic plate is provided with a through groove for the movement of the piston rod, and the liquid pump is installed on the vertical plate.

[0011] Preferably, the telescopic top beam includes a telescopic support plate, a screw rod and an internal threaded sleeve. The bottom of the inner plate and the outer plate of the telescopic support plate are both opened with through openings. The through opening of the outer plate on the telescopic support plate is rotatably connected to a screw rod. The through opening of the inner plate on the telescopic support plate is connected to an internal threaded sleeve. The internal threaded sleeve is threadedly connected to the screw rod. The inner plate and the outer plate of the telescopic support plate are respectively hinged to the left and right support plates.

[0012] Preferably, the support member includes a slider 2 which is slidably connected to the outside of the outer plate of the telescopic support plate, the bottom of the slider 2 is hinged with a support plate, the support plate is hinged to the slider 1 on the same side as it, and the bottom of the slider 2 is provided with a fastening bolt for locking it to the telescopic support plate, and the top of the fastening bolt is rotatably connected to an arc-shaped rubber block that matches the internal threaded sleeve.

[0013] Preferably, a protective net is provided between the two detachable telescopic brackets and located on the lower side of the support member. An electric push rod is installed on the side of the two front vertical plates, and the telescopic rods of the two electric push rods are upward. Hooks are connected to the telescopic rods of the two electric push rods and the side of the two rear vertical plates. Hanging rings are connected to the four corners of the protective net, and the protective net is hung on the hooks through the hanging rings.

[0014] Preferably, a connecting frame is installed on the two front vertical plates, a telescopic dial plate is hinged between the upper parts of the two connecting frames, and an electric push rod 2 is hinged on the lower parts of the two connecting frames, and the telescopic rod of the electric push rod 2 is upward and hinged to the telescopic dial plate.

[0015] Preferably, a lighting lamp is installed on the rear side vertical plate.

[0016] A method for installing a roof support for an underground metal mine, the method using the above-mentioned roof support device for an underground metal mine, the method comprising the following steps:

[0017] Step 1: Connect the L-shaped telescopic plate to the vertical plate with bolts to complete the assembly of the detachable telescopic bracket;

[0018] Step 2: Connect the support plate to the piston rod with bolts, and connect the left and right detachable telescopic brackets through the support plate and the telescopic top beam;

[0019] Step 3: hinge the support plate to the slider 1 and support the telescopic top beam through the support member;

[0020] Step 4: Connect the telescopic tube to the liquid pump;

[0021] Step 5: Hang the protective net on the hook through the hanging ring.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] 1. The detachable telescopic bracket, support plate, telescopic top beam and support member are all modularly configured to facilitate assembly and disassembly, so that the present invention has the ability to be modularly disassembled and transported for easy transportation.

[0024] 2. Each support plate can be raised and lowered individually, and each telescopic top beam can be swung and adjusted to its angle individually. Each telescopic top beam can be adjusted individually to adapt to the uneven mine tunnels, achieving the effect of flexible adjustment, so that it can adapt to mine tunnels of different sizes and shapes, thereby reducing the risk of local stress concentration and improving the support effect.

[0025] 3. The protective net can block falling rocks and improve the support effect. The electric push rod drives the hook on the front side to move down, which can pull the front side of the protective net downward to pour the fallen rocks forward and downward, thereby automatically cleaning the protective net and avoiding excessive accumulation of fallen rocks on the protective net, which may cause damage to the protective net and effectively reduce the safety risks caused by the failure of the protective net.

[0026] 4. The electric push rod 2 can drive the telescopic paddle to swing and push the fallen rocks on the protective net forward to prevent the fallen rocks from remaining on the protective net and improve the cleaning efficiency and effect of the protective net. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 Schematic diagram of the three-dimensional structure of the detachable telescopic bracket of the present invention;

[0029] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the installation of the telescopic top beam and support member of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the telescopic top beam and the support member of the present invention;

[0032] Figure 6 Schematic diagram of the three-dimensional structure of the telescopic top beam of the present invention;

[0033] Figure 7 This is a schematic diagram of the installation of the protective net, hanging ring, electric push rod and hook of the present invention;

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of the connecting frame, the telescopic dial plate and the electric push rod 2 of the present invention.

[0035] In the figure: 1- detachable telescopic bracket, 11- vertical plate, 12- L-shaped telescopic plate, 13- I-shaped telescopic plate, 14- through slot, 15- threaded rod, 16- support block, 2- slider 1, 21- lighting lamp, 3- cylinder body, 4- piston rod, 5- support plate, 6- telescopic top beam, 61- telescopic support plate, 62- screw rod, 63- internal threaded sleeve, 7- support member, 71- support plate, 72- slider 2, 73- fastening bolt, 74- arc-shaped rubber block, 8- scissor-type telescopic frame, 91- infusion tube, 92- solenoid valve, 93- liquid pump, 94- telescopic tube, 95- liquid storage tank, 101- protective net, 102- hanging ring, 103- electric push rod 1, 104- hook, 105- connecting frame, 106- telescopic dial plate, 107- electric push rod 2. DETAILED DESCRIPTION

[0036] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the present invention, the L-shaped telescopic plate 12, the I-shaped telescopic plate 13, the telescopic support plate 61, and the telescopic dial plate 106 all adopt retractable telescopic plates, which are composed of a fixed section and a telescopic section. The telescopic section is slidably connected to the fixed section. The telescopic section is generally an inner plate, and the fixed section is generally an outer plate, that is, the L-shaped telescopic plate 12 is composed of an L-shaped fixed section and an L-shaped telescopic section with one end slidably plugged into the L-shaped fixed section, the I-shaped telescopic plate 13 is composed of an I-shaped fixed section and an I-shaped telescopic section with one end slidably plugged into the I-shaped fixed section, the telescopic support plate 61 is composed of a fixed support plate and a telescopic support plate with one end slidably plugged into the fixed support plate, and the telescopic dial plate 106 is composed of a fixed pull plate and a telescopic pull plate with one end slidably plugged into the fixed pull plate.

[0038] See also Figures 1-6, a roof support device for underground metal mining, including a detachable telescopic bracket 1, the detachable telescopic bracket 1 is provided with two on the left and right, the detachable telescopic bracket 1 includes a vertical plate 11, an L-shaped telescopic plate 12, an I-shaped telescopic plate 13, a threaded rod 15 and a support block 16, the vertical plate 11 is provided with two front and rear, the inner plate and the outer plate of the L-shaped telescopic plate 12 are respectively connected to the upper part of the front and rear vertical plates 11 by bolts, the inner plate and the outer plate of the I-shaped telescopic plate 13 are respectively connected to the inner plate and the outer plate of the L-shaped telescopic plate 12 by bolts, the lower part of the vertical plate 11 is threadedly connected with a threaded rod 15, the bottom end of the threaded rod 15 vertically downwardly passes through the bottom of the vertical plate 11 and is rotatably connected to the support block 16, the I-shaped telescopic plates 13 of the two detachable telescopic brackets 1 There are five sliders 2 spaced from front to back on each slider 2. The slider 2 includes an n-type slider and a cylinder with an open top. The n-type slider is stuck on the I-shaped telescopic plate 13. The cylinder is connected to the top of the n-type slider. The n-type sliders on the front and rear sliders 2 are respectively connected to the inner plate and outer plate of the I-shaped telescopic plate 13 by bolts. The n-type sliders on the remaining three sliders 2 are slidably connected to the outer plate of the I-shaped telescopic plate 13. The adjacent two sliders 2 connected to the same I-shaped telescopic plate 13 are connected by a scissor-type telescopic frame 8. The scissor-type telescopic frame 8 is slidably sleeved on the outer wall of the cylinder of the slider 2 for easy disassembly and assembly. A cylinder 3 is installed in the cylinder of each slider 2, and a piston rod 4 is slidably connected in the cylinder 3. The plug rod 4 is vertically upward, and a support plate 5 is connected to the piston rod 4 by bolts. The support plate 5 is located on the upper side of the L-shaped telescopic plate 12. A through slot 14 is opened on the L-shaped telescopic plate 12 for the movement of the piston rod 4. The piston rod 4 passes through the through slot 14. The lower part of each cylinder body 3 is connected to an infusion tube 91, and each infusion tube 91 is equipped with an electromagnetic valve 92. The upper rear part of the front side vertical plate 11 of the two detachable telescopic brackets 1 is equipped with a liquid storage tank 95, and a liquid pump 93 is installed on the top of the liquid storage tank 95. The liquid pump 93 is connected to the liquid storage tank 95, and the liquid pump 93 is connected to the infusion tube 91 on the same side through a telescopic tube 94. A telescopic top beam 6 is hinged between the two corresponding support plates 5 on the left and right, and the telescopic top beam 6 is slidably connected to the left and right support Part 7, the support part 7 is hinged on the side of the n-shaped slider of the slider 1 2 on the same side thereof, the telescopic top beam 6 includes a telescopic support plate 61, a screw rod 62 and an internal threaded sleeve 63, the inner plate and the outer plate bottom of the telescopic support plate 61 are both provided with through openings, the through opening of the outer plate on the telescopic support plate 61 is rotatably connected with a screw rod 62, the through opening of the inner plate on the telescopic support plate 61 is connected with an internal threaded sleeve 63, the internal threaded sleeve 63 is threadedly connected to the screw rod 62, the inner plate and the outer plate of the telescopic support plate 61 are respectively hinged to the left and right support plates 5 by hinges, so as to facilitate the disassembly and assembly of the telescopic support plate 61, the support part 7 includes a slider 2 72 slidably connected to the outside of the outer plate of the telescopic support plate 61, and the bottom of the slider 2 72 is hinged with a support plate 71 by a hinge.The support plate 71 is hinged to the side of the slider of the slider 1 2 on the same side as it, so as to facilitate the disassembly and assembly of the support plate 71. The bottom of the slider 2 72 is provided with a fastening bolt 73 for locking it to the telescopic support plate 61. The top of the fastening bolt 73 is rotatably connected to an arc-shaped rubber block 74 that matches the internal threaded sleeve 63. The arc-shaped rubber block 74 can increase the friction between the fastening bolt 73 and the internal threaded sleeve 63 to prevent slipping, thereby firmly locking the slider 2 72 to the telescopic support plate 61. The sides of the two rear vertical plates 11 that are close to each other are both equipped with lighting lamps 21. The lighting lamps 21 can provide good lighting for the device, so as to help the staff to observe the operating status of the device more clearly.

[0039] When the device needs to be transported into or out of the mine tunnel, the support plate 71 is first removed from the slider 2, and then the support plate 5 is removed from the piston rod 4 to separate the left and right detachable telescopic brackets 1, and then the telescopic tube 94 is removed from the liquid pump 93, and then the L-shaped telescopic plate 12 is removed from the vertical plate 11 to realize the disassembly of the detachable telescopic bracket 1, so that the device has the ability of modular disassembly and transportation, which is convenient for subsequent transportation into or out of the mine tunnel. After the device is transported into the mine tunnel, the L-shaped telescopic plate 12 is first connected to the vertical plate 11 by bolts to complete the assembly of the detachable telescopic bracket 1, and then the support plate 5 is connected to the piston rod 4 by bolts, and the left and right detachable telescopic brackets 1 are connected by the support plate 5 and the telescopic top beam 6, and then the support plate 71 is returned to the slider 2, and then the telescopic tube 94 is returned to the liquid pump 93, so that the device is easy to disassemble and assemble, and then to transport.

[0040] By rotating the threaded rod 15 so that it drives the support block 16 downward, the vertical plate 11 can be lifted upward to adjust the height of the support plate 5 and the telescopic top beam 6 to accommodate mine tunnels of different heights. By pulling the vertical plates 11 at the front and rear sides away from each other, the L-shaped telescopic plate 12 and the I-shaped telescopic plate 13 extend accordingly. The extension of the L-shaped telescopic plate 12 pulls the front and rear sliders 2 away from each other. The front and rear sliders 2 move away from each other, pulling the scissor-type telescopic frame 8 to expand. The expansion of the scissor-type telescopic frame 8 drives the two adjacent sliders 2 away from each other, thereby moving the two adjacent support plates 5 and the two adjacent telescopic top beams 6 away from each other to accommodate mine tunnels of different lengths. Loosen the fastening bolt 73 to move the arc-shaped rubber block 74 downward and disengage from the internal threaded sleeve 63, thereby releasing the lock on the slider 2 72, and then rotate the screw rod 62 to push the internal threaded sleeve 63 to move to the right, thereby driving the telescopic support plate 61 to extend, and then making the support plates 5 on the left and right sides and the detachable telescopic brackets 1 on the left and right sides move away from each other to adapt to mine tunnels of different widths.

[0041] By controlling the electromagnetic valve 92 of the infusion tube 91 on one of the left cylinders 3 to open and controlling the left liquid pump 93 to work, the liquid in the liquid storage tank 95 can be injected into the corresponding cylinder 3 through the telescopic tube 94 and the infusion tube 91, so that the piston rod 4 in the corresponding cylinder 3 moves upward, thereby pushing the corresponding support plate 5 on the left to move upward and closely contact the top of the mine tunnel, and the corresponding telescopic top beam 6 then swings to an inclined state and closely contact the top of the mine tunnel. Each support plate 5 can be raised and lowered individually to adapt to supporting uneven mine tunnels, and each telescopic top beam 6 can be swung individually to adjust its angle to adapt to supporting uneven mine tunnels. Therefore, the device can be flexibly adjusted to adapt to mine tunnels of different sizes and shapes, thereby reducing the risk of local stress concentration and improving the support effect. When the telescopic top beam 6 swings, the support plate 71 is pulled to swing by the slider 2 72. After the angle of the telescopic top beam 6 is adjusted, the fastening bolt 73 is tightened to drive the arc-shaped rubber block 74 to move up and fit tightly against the internal threaded sleeve 63, thereby locking the slider 2 72. The telescopic top beam 6 can be supported by the support member 7 to improve the stability of the telescopic top beam 6.

[0042] See also Figure 1 and Figure 7 A protective net 101 is provided between the two detachable telescopic brackets 1 and is located on the lower side of the support member 7. Electric push rods 103 are installed on the sides of the two front vertical plates 11 that are close to each other. The telescopic rods of the two electric push rods 103 are upward, and hooks 104 are connected to the telescopic rods of the two electric push rods 103 and the sides of the two rear vertical plates 11 that are close to each other. Hanging rings 102 are connected to the four corners of the protective net 101, and the protective net 101 is hung on the hooks 104 through the hanging rings 102.

[0043] The protective net 101 can block falling rocks and improve the supporting effect. The telescopic rod of the electric push rod 103 is controlled to retract to drive the hook 104 on the front side to move downward, so that the front side of the protective net 101 can be tilted downward to pour the fallen rocks on the protective net 101 forward and downward, thereby automatically cleaning the protective net 101, avoiding excessive accumulation of fallen rocks on the protective net 101 and causing damage to the protective net 101, and effectively reducing the safety risks caused by the failure of the protective net 101.

[0044] See also Figure 7-Figure 8 A connecting frame 105 is installed on the two front vertical plates 11. The telescopic rod on the electric push rod 103 slides through the connecting frame 105 on the same side. A telescopic dial plate 106 is hinged between the upper parts of the two connecting frames 105. The inner plate and outer plate of the telescopic dial plate 106 are respectively hinged to the upper parts of the two connecting frames 105. The lower parts of the two connecting frames 105 are hinged with electric push rods 2 107. The telescopic rods of the two electric push rods 2 107 are hinged upward to the inner plate and outer plate of the telescopic dial plate 106 respectively.

[0045] After the front side of the protective net 101 tilts downward and contacts the telescopic plate 106, the telescopic rod of the second electric push rod 107 is controlled to extend, pushing the telescopic plate 106 to swing forward and upward, pushing the fallen rocks on the protective net 101 forward, thereby preventing the fallen rocks from remaining on the protective net 101 and improving the cleaning efficiency and effectiveness of the protective net 101. After the fallen rocks remaining on the protective net 101 are pushed forward, the telescopic rod of the second electric push rod 107 is controlled to retract, pulling the telescopic plate 106 to swing backward and downward to reset.

[0046] A method for installing roof support in underground metal mining, comprising the following steps:

[0047] Step 1: Connect the L-shaped telescopic plate 12 to the vertical plate 11 by bolts to complete the assembly of the detachable telescopic bracket 1;

[0048] Step 2: Connect the support plate 5 to the piston rod 4 through bolts, and connect the left and right detachable telescopic brackets 1 through the support plate 5 and the telescopic top beam 6;

[0049] Step 3: hinge the support plate 71 to the slider 1 2 and support the telescopic top beam 6 through the support member 7;

[0050] Step 4: Connect the telescopic tube 94 to the liquid pump 93;

[0051] Step 5: Hang the protective net 101 on the hook 104 through the hanging ring 102.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A roof support device for underground metal mining, characterized by: The invention comprises a detachable telescopic bracket (1), wherein a plurality of sliders (2) are provided on the left and right detachable telescopic brackets (1) at intervals from front to back, wherein the sliders (2) at the front end and the rear end are connected to the detachable telescopic bracket (1) by bolts, and the remaining sliders (2) are connected to the detachable telescopic bracket (1) in a sliding manner, and two adjacent sliders (2) connected to the same detachable telescopic bracket (1) are connected by a scissor-type telescopic bracket (8), and each slider (2) is installed with a cylinder (3), and a piston rod (4) is slidably connected in the cylinder (3), and the piston rod (4) is vertically upward. Bolts are connected with a support plate (5), and a telescopic top beam (6) is hinged between the two corresponding left and right support plates (5). The telescopic top beam (6) is slidably connected with two left and right support members (7), and the support member (7) is hinged on a slider (2) on the same side thereof. The lower part of each cylinder body (3) is connected with a liquid infusion tube (91), and each liquid infusion tube (91) is installed with a solenoid valve (92). The two detachable telescopic brackets (1) are each installed with a liquid storage tank (95), and a liquid pump (93) is installed on the top of the liquid storage tank (95). The liquid pump (93) and the liquid infusion tube (91) on the same side thereof are connected through a telescopic tube (94).

2. The roof support device for underground metal mining according to claim 1, characterized in that: The detachable telescopic bracket (1) comprises a vertical plate (11), an L-shaped telescopic plate (12), an I-shaped telescopic plate (13), a threaded rod (15) and a support block (16). The vertical plate (11) is provided with two front and rear plates. The inner plate and the outer plate of the L-shaped telescopic plate (12) are respectively connected to the upper parts of the two vertical plates (11) by bolts. The inner plate and the outer plate of the I-shaped telescopic plate (13) are respectively connected to the inner plate and the outer plate of the L-shaped telescopic plate (12). The lower part of the vertical plate (11) is threadedly connected to a threaded rod. Rod (15), the bottom end of the threaded rod (15) vertically passes through the bottom of the vertical plate (11) and is rotatably connected to the support block (16), the front end and the rear end of the slider (2) are respectively connected to the inner plate and the outer plate of the I-shaped telescopic plate (13) by bolts, and the remaining sliders (2) are slidably connected to the I-shaped telescopic plate (13), and the L-shaped telescopic plate (12) is provided with a through groove (14) for the piston rod (4) to move. The liquid pump (93) is installed on the vertical plate (11).

3. The roof support device for underground metal mining according to claim 2, characterized in that: The telescopic top beam (6) comprises a telescopic support plate (61), a screw rod (62) and an internal threaded sleeve (63). The bottoms of the inner plate and the outer plate of the telescopic support plate (61) are both provided with through openings. The screw rod (62) is rotatably connected to the through opening of the outer plate on the telescopic support plate (61). The internal threaded sleeve (63) is connected to the through opening of the inner plate on the telescopic support plate (61). The internal threaded sleeve (63) is threadedly connected to the screw rod (62). The inner plate and the outer plate of the telescopic support plate (61) are respectively hinged to the left and right support plates (5).

4. The roof support device for underground metal mining according to claim 3, characterized in that: The support member (7) includes a second slider (72) slidably connected to the outside of the outer plate of the telescopic support plate (61), the bottom of the second slider (72) is hinged with a support plate (71), the support plate (71) is hinged to the first slider (2) on the same side as it, and the bottom of the second slider (72) is provided with a fastening bolt (73) for locking it on the telescopic support plate (61), and the top of the fastening bolt (73) is rotatably connected to an arc-shaped rubber block (74) matching the internal threaded sleeve (63).

5. The roof support device for underground metal mining according to claim 4, characterized in that: A protective net (101) is provided between the two detachable telescopic brackets (1) and is located on the lower side of the support member (7). Electric push rods (103) are installed on the side surfaces of the two front vertical plates (11). The telescopic rods of the two electric push rods (103) are upward. Hooks (104) are connected to the telescopic rods of the two electric push rods (103) and the side surfaces of the two rear vertical plates (11). Hanging rings (102) are connected to the four corners of the protective net (101). The protective net (101) is hung on the hooks (104) through the hanging rings (102).

6. The roof support device for underground metal mining according to claim 5, characterized in that: A connecting frame (105) is installed on the two front vertical plates (11), a telescopic dial plate (106) is hinged between the upper parts of the two connecting frames (105), and a second electric push rod (107) is hinged on the lower parts of the two connecting frames (105), and the telescopic rod of the second electric push rod (107) is upward and hinged to the telescopic dial plate (106).

7. The roof support device for underground metal mining according to claim 6, characterized in that: A lighting lamp (21) is installed on the rear side vertical plate (11).

8. A method for installing roof support in underground metal mining, characterized in that: The method adopts an underground metal mine roof support device according to any one of claims 5 to 7, and the method comprises the following steps: Step 1: Connect the L-shaped telescopic plate (12) to the vertical plate (11) by means of bolts to complete the assembly of the detachable telescopic bracket (1); Step 2: Connect the support plate (5) to the piston rod (4) through bolts, and connect the left and right detachable telescopic brackets (1) through the support plate (5) and the telescopic top beam (6); Step 3: hinge the support plate (71) to the slider (2) and support the telescopic top beam (6) through the support member (7); Step 4: Connect the telescopic tube (94) to the liquid pump (93); Step 5: Hang the protective net (101) on the hook (104) through the hanging ring (102).

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