Double-telescopic onboard temporary support under mine

Abstract

The invention discloses an under-mine double-telescopic onboard temporary support, and belongs to the technical field of under-mine temporary support devices. The overturning device comprises an overturning arm which is rotatably mounted on the heading machine, a connecting seat is movably arranged on the overturning arm; a main top frame, a first-stage top frame and a second-stage top frame which are mutually nested through hydraulic supporting rods are arranged on the connecting seat; the folding type temporary support effectively solves the problems that an existing folding type temporary support is large in overall structure and not ideal in support effect.

Description

Technical Field

[0001] The invention relates to the technical field of temporary support devices under mines, and in particular to a double-telescopic machine-mounted temporary support under mines. Background Art

[0002] The hydraulic roof support system is a device for supporting the roof structure in the upper tunnel at the mining end. In order to solve the problem that the conventional hydraulic support structure is difficult to portably and mobilly, and cannot provide reliable support during excavation work, the applicant has designed a patent document with application number 2023110260574, "A temporary hydraulic support device on a tunneling machine and its use method"; however, during specific use, the staff found that its support effect still cannot meet the specific use requirements, which is mainly reflected in the fact that the overall structure of the currently used flip-type temporary support device is still large, and the hydraulic telescopic rod on the front side lacks effective protection, and the support effect is not ideal; based on this, it is necessary to design a new temporary support structure to solve the above-mentioned problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a double-telescopic machine-mounted temporary support for underground mines, so as to solve the problem that the overall structure of the currently used folding temporary support is relatively large and the support effect is not ideal.

[0004] To solve the above problems, the present invention provides the following technical solutions: A double-telescopic machine-mounted temporary support for underground mines; it comprises a flip arm, a connecting seat, a main top frame, a primary top frame and a secondary top frame; The flip arm comprises a functional pillar; a first axle seat and a second axle seat are also arranged on the functional pillar; the first axle seat is rotatably mounted on the tunnel boring machine through a connecting shaft; a machine-connecting hydraulic rod is hingedly mounted on the second axle seat; the other end of the machine-connecting hydraulic rod is also rotatably mounted on the tunnel boring machine through a connecting shaft; a first hydraulic support rod is mounted on the functional pillar, and the first hydraulic support rod can be extended and retracted along the length direction of the functional pillar; a second hydraulic support rod is also hingedly mounted on the functional pillar; the extended ends of the first hydraulic support rod and the second hydraulic support rod are both hingedly mounted on a connecting seat installed in cooperation with a temporary support; The connecting seat comprises a folding plate component with a right angle; a plurality of clamping plates are arranged on the folding plate; a fixed axis is arranged through the clamping plates; two push seats are also arranged on the fixed axis clamped by two adjacent clamping plates; the two push seats have different heights, and a first hydraulic support rod and a second hydraulic support rod are respectively hingedly installed on the push seats; The main top frame includes two main pillars arranged opposite to each other; a plurality of arched arch rod assemblies are arranged between the main pillars; the main pillars are characterized in that: the main pillars are hollow column structures with a hollow interior; side brackets are arranged on the side end surfaces opposite to each other of the two main pillars; the connecting seat is installed at the tail side position of the side bracket corresponding to the main pillar; a guide groove is opened on the side wall of the main pillar; the guide groove starts from the front end of the main pillar and extends toward the tail direction thereof; a first-level hydraulic rod is also arranged in the inner cavity of the main pillar; the fixed end of the first-level hydraulic rod is installed at the tail of the main pillar, and the extended end thereof can move along the direction of the guide groove; The primary top frame includes two primary pillars arranged opposite to each other; the primary pillars are hollow columnar structures, and a plurality of arch pillars are connected between the opposite end faces of the two primary pillars; grooved strips are arranged on the opposite end faces of the two primary pillars; the grooved strips are arranged through the guide grooves; a hollow push column is also arranged at the other end of the grooved strips; the push rod is arranged in the inner cavity of the main pillar; the primary pillar and the push column are parallel; a positioning hole is opened at the front position of the middle part of the push column; one end of the primary hydraulic rod is connected to the push column through the positioning hole; a secondary hydraulic rod is installed in the primary pillar; the fixed end of the secondary hydraulic rod is installed at the tail position of the primary pillar, and the extended end thereof extends from the front side of the primary pillar; The secondary top frame includes two secondary pillars arranged opposite to each other; the secondary pillars are columnar structures with hollow interiors, and a front top arch pillar is arranged on the front side of the two secondary pillars; a positioning hole is opened at the front position of the middle part of the secondary pillar; one end of the secondary hydraulic rod is connected to the secondary pillar through the positioning hole.

[0005] Preferably, the functional pillar is a hollow structure similar to a channel steel; a limiting cover plate is installed at the front end position of the notch on the top of the functional pillar; the fixed end of the first hydraulic support rod is installed on the rear side of the functional pillar, and the telescopic end thereof is arranged to pass through the lower side of the limiting cover plate; an annular pipe sleeve penetrated by the first hydraulic support rod is installed in the inner cavity of the functional pillar; a positioning clamp is installed on the annular pipe sleeve; one end of the second hydraulic support rod is hingedly installed on the positioning clamp.

[0006] Preferably, a pair of ear plates are provided at the tail of the functional pillar; the first axle seat is installed on the ear plates; a flat plate is installed on an outer side wall of the functional pillar; the second axle seat is installed on the flat plate at a position corresponding to the middle of the functional pillar; and a reinforcing rib is also provided between the flat plate and the second axle seat.

[0007] Preferably, there are three groups of arch rod assemblies in total, which are respectively arranged at the front side, the front middle and the rear middle positions of the pillar; a transverse arch column is also arranged at the tail of the pillar; the transverse arch column and the three arch rod assemblies are evenly arranged along the length direction of the pillar; the transverse arch column includes two sections of arch columns arranged opposite to each other, and one side end of the arch column is respectively connected to the tail of the two pillars, and the two sections of the arch column are connected by a square frame; a locking rod is arranged in the middle of the square frame; a lifting ring is also arranged on the tail side of the transverse arch column; splints are arranged at the tail of the pillar and the upper and lower end faces of the transverse arch column; a connecting plate is also installed at the position between the splints corresponding to the tail of the opposite end faces of the two pillars; positioning holes are opened on the connecting plate and the pillar, and the fixed end of the primary hydraulic rod is installed at the positioning hole by bolts.

[0008] Preferably, the arch rod assembly includes two C-shaped cross-section sleeves; the pillars on both sides are set through the corresponding sleeves, and the open side of the sleeve corresponds to the position of the guide groove on the pillar; curved plates are provided on the end planes of the upper and lower sides of the sleeve; the side bracket includes a positioning plate attached to the side end surface of the pillar; a number of corresponding positioning holes are provided on the positioning plate and the pillar, and the two are connected at the positioning holes by a bolt assembly; a front cross plate and two rear cross plates perpendicular to the end side surfaces are respectively provided on the front and rear sides of the other end side surface of the positioning plate; a connecting seat is installed between the two rear cross plates; a connecting rod is also provided between adjacent front and rear cross plates; rib plates are provided between the positioning plate corresponding to the connecting seat and the rear cross plates.

[0009] Preferably, the arch column is an arc-shaped column structure with a hollow interior and a square cross-section; there are three arch columns in total, which are respectively arranged at the front end, tail end and rear middle position of the first-level pillar; upper ribs or lower ribs are respectively arranged at the connecting positions of the arch column and the first-level pillar; a connecting plate is also arranged on the side end surface of the tail end of each first-level pillar; the connecting plate and the upper ribs or lower ribs are independent structures that do not interfere with each other; positioning holes are opened on the connecting plate and the first-level pillar, and the fixed end of the secondary hydraulic rod is installed at the positioning hole by means of bolts; two C-shaped protective buckle plates are symmetrically arranged on the rear side end surface of the arch column located at the tail end of the first-level pillar.

[0010] Preferably, the grooved strip is arranged in the middle position of the relative end faces of the push rod and the first-level pillar, and the length of the grooved strip is not less than half of the length of the first-level pillar and not more than three-quarters of the length of the first-level pillar; the push rod is a hollow columnar structure with a cross-section similar to that of the first-level pillar, and the rod diameter of the push rod is smaller than the column diameter of the first-level pillar; the length of the push rod and the first-level pillar are consistent; a pad is provided on the outer end face of the tail of the push rod and the side face of the inner cavity end of the front end of the first-level pillar.

[0011] Preferably, the projected length of the front top arch column on the horizontal plane is greater than the distance between the two secondary pillars; a plurality of magnetic stickers are arranged in the middle of the front top arch column; and a pad is also arranged at the tail of the secondary pillar.

[0012] Beneficial effects of the present invention: The present invention provides a double-telescopic airborne temporary support mechanism, which respectively arranges a rotatable flip arm and a machine-connected hydraulic support rod on the tunnel boring machine, so that the machine-connected hydraulic support rod can drive and control the angle of the flip arm relative to the tunnel boring machine; and a connecting seat is installed on the flip arm through a hydraulic support rod that can only be telescopic and a hinged and rotatable hydraulic support rod, and the displacement and rotation angle of the connecting seat relative to the flip arm are controlled by the mutual cooperation of the two hydraulic support rods; and a main top frame, a first-level top frame and a second-level top frame that are nested in each other are arranged on the connecting seat, and two-stage hydraulic telescopic support rods are arranged to respectively control the extension length of the first-level top frame relative to the main top frame and the telescopic length of the second-level top frame relative to the first-level top frame; this allows the tunnel boring machine to obtain a larger temporary support and protection range when working, effectively improves the support effect, and further improves safety, and the temporary support occupies less space in the retracted state, thereby reducing the occurrence of interference with the tunnel boring machine during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the inventive device in this embodiment; Figure 2 yes Figure 1 A top view of the device; Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting seat, the main top frame, the primary top frame and the secondary top frame in the assembled state in this embodiment; Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of the primary top frame and the secondary top frame of the device in the middle is in an unfolded state; Figure 5 yes Figure 3 Schematic diagram of the explosion of the device; Figure 6 is a schematic diagram of the three-dimensional structure of the main top frame and the connecting seat in the installation state in this embodiment; Figure 7 and Figure 8 They are Figure 6 Schematic diagram of the three-dimensional structure of the device at different viewing angles; Fig. 9 This is a schematic diagram of the three-dimensional structure of the first-level top frame in this embodiment. Fig.10 yes Fig. 9 A top view of the device; Fig.11is a schematic diagram of the three-dimensional structure of the flip arm and the connecting seat in the installation state in this embodiment; Fig.12 yes Fig.11 A schematic diagram of the three-dimensional structure of the device in another viewing angle; Fig.13 yes Fig.12 A schematic diagram of the three-dimensional structure of the central device after removing a side panel of the functional support; Fig.14 yes Fig.12 Left side view of the device in the middle; Fig.15 is a schematic diagram of the three-dimensional structure of the functional support, the first shaft seat and the second shaft seat in the installed state in this embodiment; Description of reference numerals: 1, flip arm, 2, connecting seat, 3, main top frame, 4, primary top frame, 5, secondary top frame; 101. functional pillar, 102. first shaft seat, 103. second shaft seat, 104. hydraulic rod of machine connection, 105. first hydraulic support rod, 106. second hydraulic support rod, 107. positioning clamp; 108. flat plate, 109. annular pipe sleeve; 201. Right-angle folding plate, 202. Plywood, 203. Push seat, 301, pillar, 301A, guide groove, 302, arch rod assembly, 302A, clamping sleeve, 302B, curved plate, 303, side bracket, 303A, positioning plate, 303B, front horizontal plate, 303C, rear horizontal plate, 303D, connecting rod, 304, connecting plate, 305, horizontal arch column, 306, frame, 307, locking rod, 308, clamping plate; 401, primary pillar, 402, arch column, 403, slotted strip plate, 404, push rod, 404A, positioning hole, 405, connecting plate, 406, pad; 501. Secondary pillar, 502. Front arch column, 503. Magnetic sticker plate. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: Example: Reference Figure 1 This embodiment provides a double telescopic machine-mounted temporary support for underground mines; it includes a flip arm 1, a connecting seat 2, a main top frame 3, a primary top frame 4 and a secondary top frame 5; The flip arm 1 includes a functional pillar 101; a first shaft seat 102 and a second shaft seat 103 are also provided on the functional pillar 101; the first shaft seat 102 is rotatably mounted on the tunnel boring machine through a connecting shaft; a machine-connecting hydraulic rod 104 is hingedly mounted on the second shaft seat 103; the other end of the machine-connecting hydraulic rod 104 is also rotatably mounted on the tunnel boring machine through a connecting shaft; a first hydraulic support rod 105 is mounted on the functional pillar 101, and the first hydraulic support rod 105 can be extended and retracted along the length direction of the functional pillar 101; a second hydraulic support rod 106 is also hingedly mounted on the functional pillar 101; the extended ends of the first hydraulic support rod 105 and the second hydraulic support rod 106 are both hingedly mounted on the connecting seat 2 installed in cooperation with the temporary support; The connecting seat 2 includes a folding plate 201 component with a right angle; a plurality of clamping plates 202 are arranged on the folding plate 201; a fixed axis is arranged through the clamping plates 202; two push seats 203 are also arranged on the fixed axis clamped by two adjacent clamping plates 202; the two push seats 203 have different heights, and the first hydraulic support rod 105 and the second hydraulic support rod 106 are respectively hingedly installed on the push seats 103; The main top frame 3 includes two main pillars 301 arranged opposite to each other; a plurality of arched arch rod assemblies 302 are arranged between the main pillars 301; the main pillars 301 are characterized in that: the main pillars 301 are hollow column structures with a hollow interior; side brackets 303 are arranged on the side end surfaces opposite to each other of the two main pillars 301; the connecting seat 2 is installed at the tail side position of the side bracket 303 corresponding to the main pillar 301; a guide groove 301A is opened on the side wall of the main pillar 301; the guide groove 301A starts from the front end of the main pillar 301 and extends toward the tail direction thereof; a primary hydraulic rod is also arranged in the inner cavity of the main pillar 301; the fixed end of the primary hydraulic rod is installed at the tail of the main pillar 301, and its extended end can move along the direction of the guide groove 301A; The primary top frame 404 includes two primary pillars 401 arranged opposite to each other; the primary pillar 401 is a columnar structure with a hollow interior, and a plurality of arch columns 402 are connected between the opposite end faces of the two primary pillars 401; grooved strips 403 are arranged on the opposite end faces of the two primary pillars 401; the grooved strips 403 are arranged through the guide grooves 301A; a hollow push column 404 is also arranged at the other end of the grooved strips 403; the push rod 404 is arranged in the inner cavity of the main pillar 301; the primary pillar 401 and the push column 404 are parallel; a positioning hole is opened at the front position of the middle part of the push column 404; one end of the primary hydraulic rod is connected to the push column 404 through the positioning hole; a secondary hydraulic rod is installed in the primary pillar 401; the fixed end of the secondary hydraulic rod is installed at the tail position of the primary pillar 401, and its extended end extends from the front side of the primary pillar 401; The secondary top frame 5 includes two secondary pillars 501 arranged opposite to each other; the secondary pillars 501 are columnar structures with a hollow interior, and a front top arch column 502 is arranged on the front side of the two secondary pillars 501; a positioning hole is opened at the front position of the middle part of the secondary pillar 501; one end of the secondary hydraulic rod is connected to the secondary pillar 501 through the positioning hole.

[0015] The functional pillar 101 is a hollow structure similar to a channel steel; a limit cover plate is installed at the front end position of the top notch of the functional pillar 101; the fixed end of the first hydraulic support rod 105 is installed on the tail side of the functional pillar, and its telescopic end is arranged to pass through the lower side of the limit cover plate; an annular pipe sleeve 109 penetrated by the first hydraulic support rod 105 is installed in the inner cavity of the functional pillar 101; a positioning clamp 107 is installed on the annular pipe sleeve 109; one end of the second hydraulic support rod 106 is hingedly installed on the positioning clamp 107.

[0016] A pair of ear plates are provided at the tail of the functional pillar 101; the first shaft seat 102 is installed on the ear plates; a flat plate 108 is installed on an outer wall of the functional pillar 101; the second shaft seat 103 is installed on the flat plate 108 at a position corresponding to the middle of the functional pillar 101; a reinforcing rib is also provided between the flat plate 108 and the second shaft seat 103. In this embodiment, the ear plates and the functional pillar are an integrated structure; one end of the flat plate 108 is connected to the ear plate at the tail of the functional pillar 101 There are three groups of arch rod assemblies 302, which are respectively arranged at the front side, the front middle and the rear middle of the pillar 301; a transverse arch column 305 is also arranged at the tail of the pillar 301; the transverse arch column 305 and the three arch rod assemblies 302 are evenly arranged along the length direction of the pillar 301; the transverse arch column 305 includes two sections of arch columns arranged opposite to each other, one end of the arch column is respectively connected to the tail of the two pillars, and the two sections of the arch column are connected by a square frame 306. A locking rod 307 is provided in the middle of the square frame 306; a lifting ring is also provided on the tail side of the transverse arch column 305; a clamping plate 308 is provided at the tail of the pillar 301 and the upper and lower end faces of the transverse arch column 305; a connecting plate 304 is also installed at the position between the clamping plates 308 corresponding to the tail of the opposite end faces of the two pillars 301; positioning holes are opened on the connecting plate 304 and the pillar 301, and the fixed end of the primary hydraulic rod is installed at the positioning hole by a bolt.

[0017] The arch rod assembly 302 includes two C-shaped cross-section sleeves 302A; the pillars 301 on both sides are set through the corresponding sleeves 302A, and the opening side of the sleeve 302A corresponds to the position of the guide groove 301A on the pillar 301; curved plates 302B are provided on the upper and lower end planes of the sleeve 302A; the side bracket 303 includes a positioning plate 303A attached to the side end surface of the pillar 301; a number of corresponding positioning holes are opened on the positioning plate 303A and the pillar 301 The two are connected at the positioning holes by a bolt assembly; a front cross plate 303B and two rear cross plates 303C perpendicular to the end side are respectively arranged on the front and rear sides of the other end side of the positioning plate 303A; the connecting seat 302 is installed between the two rear cross plates 303C; a connecting rod 303D is also arranged between the adjacent front cross plates 303B and rear cross plates 303A; ribs are arranged between the positioning plate 303A and the corresponding connecting seats 302 and the rear cross plates 303C.

[0018] The arch column 402 is a hollow arc column structure with a square cross section; there are three arch columns 402, which are respectively arranged at the front end, the tail end and the rear middle of the first-level pillar 401; the upper rib plate or the lower rib plate is respectively arranged at the position where the arch column 402 and the first-level pillar 401 are connected; a connecting plate 405 is also arranged on the side end surface of the tail of each first-level pillar 401; the connecting plate 405 and the upper rib plate or the lower rib plate are independent structures that do not interfere with each other; positioning holes are opened on the connecting plate 405 and the first-level pillar 401, and the fixed end of the secondary hydraulic rod is installed at the positioning hole by bolts; two C-shaped protective buckle plates are symmetrically arranged on the rear side end surface of the arch column 402 located at the tail end of the first-level pillar 401. The connecting plate in this embodiment is a flange-shaped component.

[0019] The grooved strip 403 is arranged in the middle position of the relative end faces of the push rod 404 and the first-level pillar 401, and the length of the grooved strip 403 is not less than half of the length of the first-level pillar 401 and not more than three quarters of the length of the first-level pillar 401; the push rod 404 is a hollow columnar structure with a cross-section similar to that of the first-level pillar 401, and the rod diameter of the push rod 404 is smaller than the column diameter of the first-level pillar 401; the length of the push rod 404 and the first-level pillar 401 are consistent; a pad 406 is provided on the outer end face of the tail of the push rod 404 and the side face of the inner cavity end of the front end of the first-level pillar 401.

[0020] The projection length of the front top arch column 502 on the horizontal plane is greater than the distance between the two secondary pillars 501 ; a plurality of magnetic adsorption plates 503 are arranged in the middle of the front top arch column 502 ; and a pad is also arranged at the tail of the secondary pillar 501 .

[0021] When using the device of the invention in this embodiment, it is only necessary to first connect the first axle seat and the lower end of the connecting hydraulic rod to the tunnel boring machine respectively, and then control the rotation angle of the functional pillar relative to the tunnel boring machine through the telescopic action of the connecting hydraulic rod; at the same time, through the joint action of the first hydraulic support rod and the second hydraulic support rod, the position and posture of the connecting seat relative to the functional pillar are further controlled, so that the supporting bracket located on the connecting seat can be close to the top of the tunnel, and then the extension length of the first top frame relative to the main top frame and the telescopic length of the second top frame relative to the first top frame are controlled respectively through the first-level hydraulic telescopic rod in the main top frame and the second-level hydraulic telescopic rod in the first-level top frame; thereby, the extended supporting bracket is moved upward and supported on the top of the tunnel.

Claims

1. A double telescopic machine-borne temporary support under a mine, characterized by: It comprises a turning arm (1), a connecting seat (2), a main top frame (3), a primary top frame (4) and a secondary top frame (5); The tilting arm (1) comprises a functional pillar (101); a first axle seat (102) and a second axle seat (103) are also arranged on the functional pillar (101); the first axle seat (102) is rotatably mounted on the tunnel boring machine via a connecting shaft; a machine-connecting hydraulic rod (104) is hingedly mounted on the second axle seat (103); the other end of the machine-connecting hydraulic rod (104) is also rotatably mounted on the tunnel boring machine via a connecting shaft; a first hydraulic support rod (105) is mounted on the functional pillar (101), and the first hydraulic support rod (105) can be extended and retracted along the length direction of the functional pillar (101); a second hydraulic support rod (106) is also hingedly mounted on the functional pillar (101); the extended ends of the first hydraulic support rod (105) and the second hydraulic support rod (106) are both hingedly mounted on a connecting seat (2) installed in cooperation with a temporary support; The connecting seat (2) comprises a folding plate (201) component with a right angle; a plurality of clamping plates (202) are arranged on the folding plate (201); a fixed axis is arranged by passing through the clamping plates (202); two push seats (203) are also arranged on the fixed axis clamped by two adjacent clamping plates (202); the two push seats (203) have different heights, and a first hydraulic support rod (105) and a second hydraulic support rod (106) are respectively hingedly mounted on the push seats (103); The main top frame (3) comprises two main pillars (301) arranged opposite to each other; a plurality of arched arch rod assemblies (302) are arranged between the main pillars (301); the main pillars (301) are characterized in that: the main pillars (301) are hollow column structures; side brackets (303) are arranged on the side end surfaces opposite to each other of the two main pillars (301); the connecting seat (2) is installed at the tail side position of the side bracket (303) corresponding to the main pillar (301); a guide groove (301A) is opened on the side wall of the main pillar (301); the guide groove (301A) starts from the front end of the main pillar (301) and extends towards the tail direction thereof; a primary hydraulic rod is also arranged in the inner cavity of the main pillar (301); the fixed end of the primary hydraulic rod is installed at the tail of the main pillar (301), and the extended end thereof can move along the direction of the guide groove (301A); The primary top frame (404) comprises two primary pillars (401) arranged opposite to each other; the primary pillars (401) are columnar structures with a hollow interior, and a plurality of arch pillars (402) are connected between the opposite end surfaces of the two primary pillars (401); a through-grooved strip plate (403) is arranged on the opposite end surfaces of the two primary pillars (401); the through-grooved strip plate (403) is arranged through the guide groove (301A); a hollow push column (402) is also arranged at the other end of the through-grooved strip plate (403) 4); the push rod (404) is arranged in the inner cavity of the main support (301); the primary support (401) and the push rod (404) are parallel; a positioning hole is opened at a front position in the middle of the push rod (404); one end of the primary hydraulic rod is connected to the push rod (404) through the positioning hole; a secondary hydraulic rod is installed in the primary support (401); the fixed end of the secondary hydraulic rod is installed at the tail position of the primary support (401), and the extended end thereof extends from the front side of the primary support (401); The secondary top frame (5) comprises two secondary pillars (501) arranged opposite to each other; the secondary pillars (501) are columnar structures with a hollow interior, and a front top arch pillar (502) is arranged on the front side of the two secondary pillars (501); a positioning hole is opened at a front position in the middle of the secondary pillar (501); and one end of the secondary hydraulic rod is connected to the secondary pillar (501) through the positioning hole.

2. The double-telescopic machine-mounted temporary support for underground mines according to claim 1 is characterized by: The functional pillar (101) is a hollow structure similar to a channel steel; a limit cover plate is installed at the front end position of the notch on the top of the functional pillar (101); the fixed end of the first hydraulic support rod (105) is installed on the rear side of the functional pillar, and the telescopic end thereof is arranged to pass through the lower side of the limit cover plate; an annular pipe sleeve (109) penetrated by the first hydraulic support rod (105) is installed in the inner cavity of the functional pillar (101); a positioning clamp (107) is installed on the annular pipe sleeve (109); and one end of the second hydraulic support rod (106) is hingedly installed on the positioning clamp (107).

3. The double-telescopic machine-mounted temporary support for underground mines according to claim 1 is characterized in that: A pair of ear plates are arranged at the rear of the functional pillar (101); the first shaft seat (102) is mounted on the ear plates; a flat plate (108) is mounted on an outer side wall of the functional pillar (101); the second shaft seat (103) is mounted on the flat plate (108) at a position corresponding to the middle of the functional pillar (101); and a reinforcing rib plate is also arranged between the flat plate (108) and the second shaft seat (103).

4. The double-telescopic machine-borne temporary support for underground mines according to claim 1 is characterized by: A total of three groups of arch rod assemblies (302) are provided; they are respectively arranged at the front side, the front middle part and the rear middle part of the pillar (301); a transverse arch column (305) is also provided at the tail end of the pillar (301); the transverse arch column (305) and the three arch rod assemblies (302) are evenly arranged along the length direction of the pillar (301); the transverse arch column (305) includes two sections of arch columns arranged opposite to each other, one end of the arch column is respectively connected to the tail ends of the two pillars, and the two sections of the arch column are connected by a square frame (306); A locking rod (307) is provided in the middle of the square frame (306); a lifting ring is also provided at the rear side of the transverse arch column (305); clamping plates (308) are provided at the rear of the pillar (301) and the upper and lower end surfaces of the transverse arch column (305); a connecting plate (304) is also installed at the position between the clamping plates (308) at the rear of the opposite end surfaces of the two pillars (301); positioning holes are opened on the connecting plate (304) and the pillars (301), and the fixed end of the primary hydraulic rod is installed at the positioning hole by means of bolts.

5. The double-telescopic machine-borne temporary support for underground mines according to claim 1 is characterized by: The arch rod assembly (302) includes two C-shaped cross-section sleeves (302A); the pillars (301) on both sides are arranged through the corresponding sleeves (302A), and the opening side of the sleeve (302A) corresponds to the position of the guide groove (301A) on the pillar (301); curved plates (302B) are arranged on the upper and lower end planes of the sleeve (302A); the side bracket (303) includes a positioning plate (303A) attached to the side end surface of the pillar (301); a plurality of relative openings are opened on the positioning plate (303A) and the pillar (301). The two are connected at the positioning holes by means of a bolt assembly; a front cross plate (303B) and two rear cross plates (303C) perpendicular to the end side surface are respectively arranged on the front and rear sides of the other end side surface of the positioning plate (303A); the connecting seat (302) is installed between the two rear cross plates (303C); a connecting rod (303D) is also arranged between adjacent front cross plates (303B) and rear cross plates (303A); and rib plates are respectively arranged between the connecting seat (302) and the rear cross plates (303C) of the positioning plate (303A).

6. The double-telescopic machine-mounted temporary support for underground mines according to claim 1 is characterized by: The arch column (402) is a hollow arc column structure with a square cross section; there are three arch columns (402) in total, which are respectively arranged at the front end, the rear end and the middle rear position of the primary pillar (401); upper ribs or lower ribs are respectively arranged at the positions where the arch column (402) and the primary pillar (401) are connected; a connecting plate (405) is also arranged on the side end surface of the rear end of each primary pillar (401); the connecting plate (405) and the upper ribs or lower ribs are independent structures that do not interfere with each other; positioning through holes are opened on the connecting plate (405) and the primary pillar (401), and the fixed end of the secondary hydraulic rod is installed at the positioning through holes by means of bolts; two C-shaped protective buckle plates are symmetrically arranged on the rear side end surface of the arch column (402) located at the rear end of the primary pillar (401).

7. The double-telescopic machine-borne temporary support for underground mines according to claim 1 is characterized by: The slotted strip plate (403) is arranged at the middle position of the opposite end surfaces of the push rod (404) and the primary support (401), and the length of the slotted strip plate (403) is not less than half the length of the primary support (401) and not more than three quarters the length of the primary support (401); The push rod (404) is a hollow columnar structure having a cross-section similar to that of the primary pillar (401), and the rod diameter of the push rod (404) is smaller than the column diameter of the primary pillar (401); The push rod (404) and the first-level support (401) are of the same length; a pad (406) is provided on the outer end surface of the rear end of the push rod (404) and the inner cavity end side surface of the front end of the first-level support (401).

8. The double-telescopic machine-mounted temporary support for underground mines according to claim 1 is characterized by: The projection length of the front arch column (502) on the horizontal plane is greater than the distance between the two secondary pillars (501); a plurality of magnetic attraction plates (503) are arranged in the middle of the front arch column (502); and a pad is also arranged at the tail of the secondary pillar (501).

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