A self-moving temporary support equipment and support method thereof

Abstract

A self-moving temporary support equipment and a support method thereof belong to the technical field of underground support of coal mines, and solve the technical problems of low working efficiency of existing support equipment and reducing the number of supporting equipment. The solution is: a number of temporary support equipment spans above the tunnel boring machine and is arranged in sequence along the tunneling direction. The top beam assembly includes a first top beam and a second top beam. The first and tail ends of the first top beam are respectively hinged to one end of the second top beam through the top beam connecting ear seat, and the other end of the second top beam is hinged to the column assembly through the column connecting ear seat. The column assemblies on both sides are arranged oppositely, and a self-moving base component is arranged below the column assembly. The temporary support equipment at the end of the present invention can be reduced in size and self-moving, and unfolded after moving to the front of the tunneling working face, so as to provide timely temporary support for the newly cut tunnel roof of the tunnel boring machine, so as to achieve the synchronous follow-up of the tunnel boring machine's coal cutting progress and the support forward movement, thereby enhancing the support strength and stability and having stronger adaptability.

Description

Technical Field

[0001] The invention belongs to the technical field of underground tunnel support in coal mines, and in particular relates to a step-by-step self-moving temporary support equipment and a support method thereof. Background Art

[0002] In the continuous mining and filling coal mining process of coal mines, the "long wall layout, short wall mining" form is adopted. The length of the branch tunnel coal mining operation face is generally 80m. In order to ensure the safety of branch tunnel coal mining and excavation operations, improve the level of mechanical temporary support devices facing the excavation working face and the excavation production efficiency, the self-moving temporary support device of the straddled tunnel boring machine plays an important role. Common temporary support methods are:

[0003] The single hydraulic support is equipped with a π-shaped metal hinged beam. This support method has high labor intensity, cannot be mechanized, has low efficiency, a small support area, and requires personnel to enter the empty top area for operation, which poses a high safety risk.

[0004] Front beam support: This support method has no initial support force, poor safety and reliability, high labor intensity, and low support strength;

[0005] The temporary support device carried by the tunnel boring machine has a small support area and low support strength, and there is a great safety risk for personnel to enter the empty top area outside the support area.

[0006] The above three are traditional temporary support methods for excavation. For short-wall mining technology, in order to achieve the parallel operation relationship between excavation and support and the requirement of no repeated support for the roof, the above three support methods have poor adaptability. Summary of the invention

[0007] In order to overcome the shortcomings of the prior art and solve the technical problems of low working efficiency, poor safety and reliability, and high labor intensity of the existing support devices, the present invention provides a step-by-step self-moving temporary support equipment and a support method thereof, which realizes the mechanization of temporary support for tunneling, the relationship of "parallel operation of tunneling and support", and no repeated support for the roof, effectively improving the safety and reliability of tunneling operations and the efficiency of production footage. The temporary support equipment at the end can be reduced in size and self-moving, moved to the front of the tunneling working face and then unfolded, and timely temporary support is provided for the newly cut tunnel roof by the tunneling machine, so as to realize the synchronous follow-up of the tunneling machine's coal cutting footage advancement and the support forward movement.

[0008] The present invention is achieved through the following technical solutions.

[0009] A self-moving temporary support equipment, comprising a supporting oil cylinder, a traveling oil cylinder, an ear seat, a top beam assembly and a column assembly, wherein the traveling oil cylinder comprises a first traveling oil cylinder and a second traveling oil cylinder, wherein: according to actual working conditions, a plurality of temporary support equipments are arranged across the top of a tunnel boring machine and arranged in sequence along the tunneling forward direction; the top beam assembly comprises a first top beam and a second top beam, the first and second ends of the first top beam are respectively hinged to one end of the second top beam through the top beam connecting ear seat, the other end of the second top beam is hinged to the column assembly through the column connecting ear seat, the column assemblies on both sides are arranged opposite to each other, and a self-moving base component is arranged below the column assembly;

[0010] The self-moving base component includes a left lifting base, a right lifting base and a sliding base. The left lifting base and the right lifting base are arranged at the front and rear ends of the sliding base relative to each other, and a second ear seat for fixed connection with the column assembly is arranged on the upper surface of the sliding base; the left lifting base and the right lifting base both include an outer lifting frame, a base lifting cylinder, an inner guide frame and a third ear seat; the outer lifting frame is sleeved on the outside of the inner guide frame, the base lifting cylinder is arranged between the outer lifting frame and the inner guide frame, and the base lifting cylinder drives the outer lifting frame to rise or fall along the inner guide frame; in the left lifting base, the outer lifting frame is a first outer lifting frame, and the third ear seat is arranged on the inner side wall of the first outer lifting frame the middle position of the right lifting base; the outer lifting frame in the right lifting base is the second outer lifting frame, and the third ear seat is arranged at the lower position of the inner side wall of the second outer lifting frame; the first ear seat is respectively arranged on the side wall of the sliding base at a position horizontally opposite to the third ear seat; the second traveling oil cylinder is arranged above the first traveling oil cylinder, the axial direction of the first traveling oil cylinder is parallel to the axial direction of the second traveling oil cylinder, and the directions of the first traveling oil cylinder and the second traveling oil cylinder are opposite, the cylinder barrel of the first traveling oil cylinder and the cylinder barrel of the second traveling oil cylinder are respectively fixedly connected to the corresponding first ear seat, and the piston rod of the first traveling oil cylinder and the piston rod of the second traveling oil cylinder are respectively fixedly connected to the corresponding third ear seat;

[0011] The column assembly includes an outer column frame, an inner column frame and a column lifting cylinder. The outer column frame is sleeved on the outside of the inner column frame. The column lifting cylinder is symmetrically arranged below the two ends of the outer column frame. The cylinder barrel of the column lifting cylinder is fixedly connected to the second ear seat. The piston rod of the column lifting cylinder is fixedly connected to the two ends of the outer column frame. The column lifting cylinder drives the outer column frame to rise or fall along the inner column frame.

[0012] Support cylinders are arranged between the upper parts of the column assemblies on both sides and the top beam assemblies respectively, and the support cylinders include a first support cylinder and a second support cylinder, a fourth ear seat is fixedly mounted on the upper part of the column assembly, a sixth ear seat is fixedly mounted on the lower surface of the first top beam, a cylinder barrel of the first support cylinder is hinged to the fourth ear seat, a piston rod of the first support cylinder and a piston rod of the second support cylinder are both hinged to the fifth ear seat, the fifth ear seat is fixedly mounted on the lower surface of the second top beam, and a cylinder barrel of the second support cylinder is hinged to the sixth ear seat.

[0013] Furthermore, when the temporary support equipment is in a supporting state, the self-moving base component is a load-bearing component, bearing the pressure of the top plate and the reaction force of the bottom plate, and the pressure of the top plate is transmitted to the self-moving base component through the top beam assembly and the column assembly; when the temporary support equipment is in a moving state, the self-moving base component drives the entire end of the temporary support equipment to move forward until the end of the temporary support equipment moves to the head position of the working surface.

[0014] Furthermore, the cylinder barrel of the base lifting cylinder is fixedly connected to the top surface of the corresponding outer lifting frame, and the piston rod of the base lifting cylinder is fixedly connected to the bottom surface of the inner guide frame.

[0015] Furthermore, when the temporary support equipment is in a supporting state, the column lifting cylinder extends to the maximum stroke position, pushing the top beam assembly to lift and support the top plate, and the first supporting cylinder is in the zero stroke position, and the second supporting cylinder is in the maximum stroke position; when the temporary support equipment is in a retracted state, the column lifting cylinder is retracted to the zero stroke position, driving the top beam assembly to descend, and the first supporting cylinder is in the maximum stroke position, and the second supporting cylinder is in the zero stroke position.

[0016] A supporting method of a self-propelled temporary supporting equipment comprises the following steps:

[0017] S1. The temporary support equipment at the end is converted from the supporting state to the contracted state:

[0018] S1-1, the column lifting cylinder falls back to the zero stroke position, and the overall height of the top beam assembly and the column assembly is reduced;

[0019] S1-2, the first supporting oil cylinder extends to the maximum stroke position, while the second supporting oil cylinder retracts to the zero stroke position, the second top beam rotates inward around the top beam connecting ear seat, driving the self-moving base components and column components on both sides of the last temporary support equipment to move inward synchronously, and the overall width of the last temporary support equipment is narrowed. The overall width of the last temporary support equipment in the contracted state is smaller than the overall width of the last temporary support equipment in the supporting state, and the height of the top beam assembly is greater than the height after the action of step S1-1, and is lower than the height of the top beam assembly in the supporting state;

[0020] S2. The last temporary support equipment moves to the front end of the entire set of temporary support equipment:

[0021] S2-1, the piston rod of the first travel cylinder of the temporary support equipment at the end extends, pushing the right lifting base forward;

[0022] S2-2, the base lifting cylinder rises, pushing the outer lifting frame to rise, and at the same time the sliding base, column assembly and top beam assembly rise synchronously;

[0023] S2-3, the first travel cylinder retracts, and the second travel cylinder extends at the same time, the sliding base slides forward synchronously with the second travel cylinder, and the top beam assembly and column assembly of the temporary support equipment at the end slide forward as a whole;

[0024] S2-4, the base lifting cylinder retracts, the external lifting frame is linked to descend, the sliding base is synchronously descended, and the top beam assembly and column assembly of the temporary support equipment at the end synchronously fall back to the lowest position;

[0025] S2-5, the second travel cylinder retracts, and the left lifting base slides forward synchronously, completing the forward movement of the temporary support equipment at the end by one step;

[0026] S2-6, repeating the above steps S2-1 to S2-5, the last temporary support equipment moves to the front end of the entire set of temporary support equipment;

[0027] S3, the last temporary support equipment is converted from the contracted state to the supporting state: steps S1-2 and S1-1 are sequentially reversed until the last temporary support equipment reaches the preset supporting height;

[0028] S4. The endmost temporary support equipment repeats the above steps S1 to S3 for each coal cutting by the tunnel boring machine at least twice. The endmost temporary support equipment changes from the supporting state to the contracted state, and then moves to the frontmost position of the entire set of temporary support equipment. Finally, the endmost temporary support equipment resumes the supporting state and reaches the preset support height.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. It can move by itself without the need for a supporting support truck;

[0031] 2. The single frame roof support area is large and the specific pressure is small, which can better protect the integrity of the roof of the support section and has higher safety;

[0032] 3. Compared with the door-shaped bracket, the number of frame moves is less, which increases the working efficiency;

[0033] 4. The base has a large supporting area, higher stability, and can adapt to large inclination angles of the working surface;

[0034] 5. The volume can be reduced, which is more flexible and adaptable. When the tunnel has local spalling and bulging, causing the tunnel width to narrow, the temporary support equipment can adjust the height and width of the corresponding frame to adapt to the actual tunnel width for normal support;

[0035] 6. It can achieve no repeated support and avoid deformation of the top plate during repeated "loading / unloading" process.

[0036] In summary, the present invention adopts the above technical solution to improve the working efficiency. The support equipment adopts the self-moving temporary support equipment. Each temporary support equipment can achieve volume reduction, support and walking through the hydraulic control system, reducing the matching of crawler frame transfer vehicles, simplifying the process flow, improving the working efficiency and mechanization degree, enhancing the support strength and stability, and being more adaptable. It can also achieve no repeated support, realize the digging-support-anchor-transportation operation, reduce staff and increase efficiency, and improve the safety of personnel and equipment. It can also achieve no repeated support in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the three-dimensional structure of the entire set of temporary support equipment;

[0038] Figure 2 It is a schematic diagram of the main structure of the support status of the entire set of temporary support equipment;

[0039] Figure 3 It is a side view structure comparison diagram of the temporary support equipment in the supporting state and the contracted state;

[0040] Figure 4 It is a schematic diagram of the three-dimensional structure of the temporary support equipment supporting state;

[0041] Figure 5 It is a schematic diagram of the three-dimensional structure of the temporary support equipment in a supporting state tilted upward;

[0042] Figure 6 It is a schematic diagram of the three-dimensional structure of the temporary support equipment in the retracted state;

[0043] Figure 7 It is a schematic diagram of the three-dimensional structure of the self-moving base component;

[0044] Figure 8 It is a schematic diagram of the three-dimensional structure of the left lifting base;

[0045] Fig. 9 It is a schematic diagram of the three-dimensional structure of the right lifting base;

[0046] Fig.10 It is a flow chart of the walking process of the self-moving base component;

[0047] Fig.11 It is a schematic diagram of the three-dimensional structure of the column component;

[0048] Fig.12 It is a schematic diagram of the main structure when the supporting cylinder is in the supporting state;

[0049] Fig.13 It is a schematic diagram of the main structure when the supporting cylinder is in a retracted state;

[0050] Fig.14 Provide a flow chart for the temporary support equipment walking process;

[0051] Fig.15 for Fig.14 Schematic diagram of the side view structure of the temporary support equipment during its movement;

[0052] Fig.16 It is a schematic diagram of the main structure of the temporary support equipment during its contraction process;

[0053] Fig.17 This is a schematic diagram of the main structure of the temporary support equipment supporting process.

[0054] In the figure, 1 is a self-moving base component, 1-1 is a sliding base, 1-2 is a left lifting base, 1-2-1 is a first outer lifting frame, 1-2-2 is a base lifting cylinder, 1-2-3 is an inner guide frame, 1-2-4 is a third ear seat, 1-3 is a right lifting base, 1-3-1 is a second outer lifting frame, 1-4 is a first ear seat, 1-5 is a first walking cylinder, 1-6 is a second walking cylinder, 1-7 is a second ear seat, 2 is a column assembly, 2-1 is an outer column frame, 2-2 is an inner column frame, 2-3 is a column lifting cylinder, 3 is a first top beam, 4 is a second top beam, 5-1 is a top beam connecting ear seat, 5-2 is a column connecting ear seat, 6 is a supporting cylinder, 6-1 is a fourth ear seat, 6-2 is a first supporting cylinder, 6-3 is a fifth ear seat, 6-4 is a second supporting cylinder, and 6-5 is a sixth ear seat. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0056] A self-propelled temporary support equipment, comprising a supporting cylinder 6, a traveling cylinder, an ear seat, a top beam assembly and a column assembly 2, wherein the traveling cylinder comprises a first traveling cylinder 1-5 and a second traveling cylinder 1-6, wherein: Figure 1As shown, in this embodiment, the self-moving temporary support equipment is composed of 8 temporary support equipments in total. The specific number of supporting equipments is reasonably equipped according to the total length of the supporting different types of tunnel boring machines and the requirements of safe construction. The temporary support equipments span the top of the tunnel boring machine and are arranged in sequence along the tunneling direction; the top beam assembly includes a first top beam 3 and a second top beam 4, the first and tail ends of the first top beam 3 are respectively hinged to one end of the second top beam 4 through a top beam connecting ear seat 5-1, and the other end of the second top beam 4 is hinged to the column assembly 2 through a column connecting ear seat 5-2, and the column assemblies 2 on both sides are arranged opposite to each other, and a self-moving base component 1 is arranged below the column assembly 2;

[0057] The self-moving base component 1 includes a left lifting base 1-2, a right lifting base 1-3 and a sliding base 1-1. The left lifting base 1-2 and the right lifting base 1-3 are relatively arranged at the head and tail ends of the sliding base 1-1, and a second ear seat 1-7 for fixed connection with the column assembly 2 is arranged on the upper surface of the sliding base 1-1; the left lifting base 1-2 and the right lifting base 1-3 both include an outer lifting frame, a base lifting cylinder 1-2-2, an inner guide frame 1-2-3 and a third ear seat 1-2-4, the outer lifting frame is sleeved on the outside of the inner guide frame 1-2-3, the base lifting cylinder 1-2-2 is arranged between the outer lifting frame and the inner guide frame 1-2-3, and the base lifting cylinder 1-2-2 drives the outer lifting frame to rise or fall along the inner guide frame 1-2-3; the outer lifting frame in the left lifting base 1-2 is the first outer lifting frame 1-2-1, and the third ear seat 1-2-4 is arranged on the first outer lifting frame The outer lifting frame in the right lifting base 1-3 is the second outer lifting frame 1-3-1, and the third ear seat 1-2-4 is arranged at the lower position of the inner wall of the second outer lifting frame 1-3-1; the first ear seat 1-4 is respectively arranged on the side wall of the sliding base 1-1 at a horizontal relative position to the third ear seat 1-2-4; the second traveling oil cylinder 1-6 is arranged above the first traveling oil cylinder 1-5, the axial direction of the first traveling oil cylinder 1-5 is parallel to the axial direction of the second traveling oil cylinder 1-6, and the directions of the first traveling oil cylinder 1-5 and the second traveling oil cylinder 1-6 are opposite, the cylinder barrel of the first traveling oil cylinder 1-5 and the cylinder barrel of the second traveling oil cylinder 1-6 are respectively fixedly connected to the corresponding first ear seat 1-4, and the piston rod of the first traveling oil cylinder 1-5 and the piston rod of the second traveling oil cylinder 1-6 are respectively fixedly connected to the corresponding third ear seat 1-2-4;

[0058] The column assembly 2 includes an outer column frame 2-1, an inner column frame 2-2 and a column lifting cylinder 2-3. The outer column frame 2-1 is sleeved on the outside of the inner column frame 2-2. The inner column frame 2-2 plays a lifting and guiding role for the outer column frame 2-1 to ensure the stable support of the column assembly 2. The column lifting cylinder 2-3 is symmetrically arranged below the two ends of the outer column frame 2-1. The cylinder barrel of the column lifting cylinder 2-3 is fixedly connected to the second ear seat 1-7. The piston rod of the column lifting cylinder 2-3 is fixedly connected to the two ends of the outer column frame 2-1. The column lifting cylinder 2-3 drives the outer column frame 2-1 to rise or fall along the inner column frame 2-2.

[0059] Support cylinders 6 are arranged between the upper parts of the column assemblies 2 on both sides and the top beam assemblies respectively, and the support cylinders 6 include a first support cylinder 6-2 and a second support cylinder 6-4, a fourth ear seat 6-1 is fixedly mounted on the upper part of the column assembly 2, and a sixth ear seat 6-5 is fixedly mounted on the lower surface of the first top beam 3. The cylinder barrel of the first support cylinder 6-2 is hinged to the fourth ear seat 6-1, and the piston rod of the first support cylinder 6-2 and the piston rod of the second support cylinder 6-4 are both hinged to the fifth ear seat 6-3, and the fifth ear seat 6-3 is fixedly mounted on the lower surface of the second top beam 4, and the cylinder barrel of the second support cylinder 6-4 is hinged to the sixth ear seat 6-5.

[0060] Furthermore, when the temporary support equipment is in a supporting state, the self-moving base component 1 is a load-bearing component, bearing the pressure of the top plate and the reaction force of the bottom plate, and the pressure of the top plate is transmitted to the self-moving base component 1 through the top beam assembly and the column assembly; when the temporary support equipment is in a moving state, the self-moving base component 1 drives the entire end of the temporary support equipment to move forward until the end of the temporary support equipment moves to the head position of the working surface.

[0061] Furthermore, the cylinder barrel of the base lifting cylinder 1-2-2 is fixedly connected to the top surface of the corresponding outer lifting frame, and the piston rod of the base lifting cylinder 1-2-2 is fixedly connected to the bottom surface of the inner guide frame 1-2-3.

[0062] Furthermore, when the temporary support equipment is in a supporting state, the column lifting cylinder 2-3 extends to the maximum stroke position, pushing the top beam assembly to lift and support the top plate, and the first supporting cylinder 6-2 is in the zero stroke position, and the second supporting cylinder 6-4 is in the maximum stroke position; when the temporary support equipment is in a retracted state, the column lifting cylinder 2-3 is retracted to the zero stroke position, driving the top beam assembly to descend, and the first supporting cylinder 6-2 is in the maximum stroke position, and the second supporting cylinder 6-4 is in the zero stroke position.

[0063] A supporting method of a self-propelled temporary supporting equipment comprises the following steps:

[0064] S1. The temporary support equipment at the end is converted from the supporting state to the contracted state:

[0065] S1-1, the column lifting cylinder 2-3 falls back to the zero stroke position, and the overall height of the top beam assembly and the column assembly 2 is reduced;

[0066] S1-2, the first supporting oil cylinder 6-2 is extended to the maximum stroke position, and the second supporting oil cylinder 6-4 is retracted to the zero stroke position. The second top beam 4 rotates inward around the top beam connecting ear seat 5-1, driving the self-moving base component 1 and the column component 2 on both sides of the last temporary support equipment to move inward synchronously, and the overall width of the last temporary support equipment is narrowed. The overall width of the last temporary support equipment in the contracted state is smaller than the overall width of the last temporary support equipment in the supporting state. The height of the top beam assembly is greater than the height after the action of step S1-1, and is lower than the height of the top beam assembly in the supporting state, so that it can pass smoothly from under the front bracket group;

[0067] S2. The last temporary support equipment walks to the front end of the entire set of temporary support equipment:

[0068] S2-1, the piston rod of the first travel cylinder 1-5 of the last temporary support equipment extends to push the right lifting base 1-3 forward;

[0069] S2-2, the base lifting cylinder 1-2-2 rises, pushing the outer lifting frame to rise, and at the same time the sliding base 1-1, column assembly 2 and top beam assembly rise synchronously;

[0070] S2-3, the first travel cylinder 1-5 retracts, and the second travel cylinder 1-6 extends at the same time, the sliding base 1-1 slides forward synchronously with the second travel cylinder 1-6, and the top beam assembly and column assembly 2 of the endmost temporary support equipment slide forward as a whole;

[0071] S2-4, the base lifting cylinder 1-2-2 retracts, the external lifting frame is linked to descend, the sliding base is synchronously descended, and the top beam assembly and column assembly 2 of the temporary support equipment at the end fall back to the lowest position;

[0072] S2-5, the second travel cylinder 1-6 retracts, and the left lifting base 1-2 slides forward synchronously, completing the forward movement of the temporary support equipment at the end by one step;

[0073] S2-6, repeating the above steps S2-1 to S2-5, the last temporary support equipment moves to the front end position of the entire set of temporary support equipment, that is, reaches the front position of the working face;

[0074] S3, the last temporary support equipment is converted from the contracted state to the supporting state: the steps S1-2 and S1-1 are sequentially reversed until the last temporary support equipment reaches the preset supporting height, and then the frame is lifted and supported, and the exposed top plate and two sides are supported in time;

[0075] S4. After the tunnel boring machine cuts the coal twice, the temporary support equipment at the end repeats the above steps S1 to S3.

[0076] A temporary support equipment has two steps for retracting, five steps for walking, and two steps for supporting. A total of nine steps constitute a complete movement cycle of a temporary support equipment. This cycle repeats itself. As the roadheader cuts coal, the entire set of temporary support equipment moves alternately from back to front to ensure safe and efficient operations.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A support method for a self-propelled temporary support equipment, characterized in that: The self-moving temporary support equipment comprises a supporting cylinder (6), a traveling cylinder, an ear seat, a top beam assembly and a column assembly (2), wherein the traveling cylinder comprises a first traveling cylinder (1-5) and a second traveling cylinder (1-6), and is characterized in that: according to actual working conditions, a plurality of temporary support equipment are arranged across the top of the tunnel boring machine and arranged in sequence along the tunneling direction; the top beam assembly comprises a first top beam (3) and a second top beam (4), the front and rear ends of the first top beam (3) are respectively hinged to one end of the second top beam (4) through a top beam connecting ear seat (5-1), the other end of the second top beam (4) is hinged to the column assembly (2) through a column connecting ear seat (5-2), the column assemblies (2) on both sides are arranged opposite to each other, and a self-moving base component (1) is arranged below the column assembly (2); The self-moving base component (1) comprises a left lifting base (1-2), a right lifting base (1-3) and a sliding base (1-1); the left lifting base (1-2) and the right lifting base (1-3) are arranged at the front and rear ends of the sliding base (1-1) relative to each other; a second ear seat (1-7) for fixedly connecting to the column assembly (2) is arranged on the upper surface of the sliding base (1-1); the left lifting base (1-2) and the right lifting base (1-3) both comprise an outer lifting frame, a base lifting cylinder (1-2-2 ), an inner guide frame (1-2-3) and a third ear seat (1-2-4), the outer lifting frame is sleeved on the outside of the inner guide frame (1-2-3), the base lifting cylinder (1-2-2) is arranged between the outer lifting frame and the inner guide frame (1-2-3), and the base lifting cylinder (1-2-2) drives the outer lifting frame to rise or fall along the inner guide frame (1-2-3); in the left lifting base (1-2), the outer lifting frame is the first outer lifting frame (1-2-1), and the third ear seat (1-2-4) is arranged on the first The outer lifting frame (1-2-1) is disposed at the middle of the inner wall of the outer lifting frame (1-2-1); in the right lifting base (1-3), the outer lifting frame is the second outer lifting frame (1-3-1); the third ear seat (1-2-4) is disposed at the lower part of the inner wall of the second outer lifting frame (1-3-1); the first ear seats (1-4) are respectively disposed on the side wall of the sliding base (1-1) at positions horizontally relative to the third ear seats (1-2-4); the second travel cylinder (1-6) is disposed above the first travel cylinder (1-5); The axis direction of the first travel oil cylinder (1-5) is parallel to the axis direction of the second travel oil cylinder (1-6), and the directions of the first travel oil cylinder (1-5) and the second travel oil cylinder (1-6) are opposite, the cylinder barrel of the first travel oil cylinder (1-5) and the cylinder barrel of the second travel oil cylinder (1-6) are respectively fixedly connected to the corresponding first ear seat (1-4), and the piston rod of the first travel oil cylinder (1-5) and the piston rod of the second travel oil cylinder (1-6) are respectively fixedly connected to the corresponding third ear seat (1-2-4); The column assembly (2) comprises an outer column frame (2-1), an inner column frame (2-2) and a column lifting cylinder (2-3); the outer column frame (2-1) is sleeved on the outside of the inner column frame (2-2); the column lifting cylinder (2-3) is symmetrically arranged below the two ends of the outer column frame (2-1); the cylinder barrel of the column lifting cylinder (2-3) is fixedly connected to the second ear seat (1-7); the piston rod of the column lifting cylinder (2-3) is fixedly connected to the two ends of the outer column frame (2-1); the column lifting cylinder (2-3) drives the outer column frame (2-1) to rise or fall along the inner column frame (2-2); Support cylinders (6) are arranged between the upper parts of the column assemblies (2) on both sides and the top beam assemblies, respectively. The support cylinders (6) include a first support cylinder (6-2) and a second support cylinder (6-4). The fourth ear seat (6-1) is fixedly mounted on the upper part of the column assembly (2). The sixth ear seat (6-5) is fixedly mounted on the lower surface of the first top beam (3). The cylinder barrel of the first support cylinder (6-2) is hinged to the fourth ear seat (6-1). The piston rod of the first support cylinder (6-2) and the piston rod of the second support cylinder (6-4) are both hinged to the fifth ear seat (6-3). The fifth ear seat (6-3) is fixedly mounted on the lower surface of the second top beam (4). The cylinder barrel of the second support cylinder (6-4) is hinged to the sixth ear seat (6-5). The support method of the self-propelled temporary support equipment includes the following steps: S1. The temporary support equipment at the end is converted from the supporting state to the contracted state: S1-1, the column lifting cylinder (2-3) falls back to the zero stroke position, and the overall height of the top beam assembly and the column assembly (2) is reduced; S1-2, the first supporting oil cylinder (6-2) is extended to the maximum stroke position, while the second supporting oil cylinder (6-4) is retracted to the zero stroke position, the second top beam (4) rotates inwardly around the top beam connecting ear seat (5-1), driving the self-moving base components (1) and the column components (2) on both sides of the last temporary support equipment to move inwardly synchronously, the overall width of the last temporary support equipment is narrowed, the overall width of the last temporary support equipment in the retracted state is smaller than the overall width of the last temporary support equipment in the supporting state, and the height of the top beam assembly is greater than the height after the action of step S1-1, and is lower than the height of the top beam assembly in the supporting state; S2. The last temporary support equipment moves to the front end of the entire set of temporary support equipment: S2-1, the piston rod of the first travel cylinder (1-5) of the temporary support equipment at the end extends to push the right lifting base (1-3) forward; S2-2, the base lifting cylinder (1-2-2) is raised, pushing the outer lifting frame to rise, and at the same time the sliding base (1-1), the column assembly (2) and the top beam assembly are raised synchronously; S2-3, the first travel cylinder (1-5) retracts, and the second travel cylinder (1-6) extends at the same time, the sliding base (1-1) slides forward synchronously with the second travel cylinder (1-6), and the top beam assembly and the column assembly (2) of the temporary support equipment at the end slide forward as a whole; S2-4, the base lifting cylinder (1-2-2) is retracted, the external lifting frame is linked to descend, the sliding base (1-1) is synchronously descended, and the top beam assembly and column assembly (2) of the temporary support equipment at the end are synchronously returned to the lowest position; S2-5, the second travel cylinder (1-6) is retracted, and the left lifting base (1-2) moves forward synchronously, completing the forward movement of the temporary support equipment at the end by one step; S2-6, repeating the above steps S2-1 to S2-5, the last temporary support equipment moves to the front end of the entire set of temporary support equipment; S3, the last temporary support equipment is converted from the contracted state to the supporting state: steps S1-2 and S1-1 are sequentially reversed until the last temporary support equipment reaches the preset supporting height; S4. The tunnel boring machine cuts the coal at least twice, and the temporary support equipment at the end repeats the above steps S1 to S3.

2. The supporting method of the self-propelled temporary supporting equipment according to claim 1 is characterized in that: When the temporary support equipment is in a supporting state, the self-moving base component (1) is a load-bearing component that bears the pressure of the top plate and the reaction force of the bottom plate. The pressure of the top plate is transmitted to the self-moving base component (1) through the top beam component and the column component. When the temporary support equipment is in a moving state, the self-moving base component (1) drives the temporary support equipment at the end to move forward as a whole until the temporary support equipment at the end moves to the head position of the working surface.

3. The supporting method of the self-propelled temporary supporting equipment according to claim 1 is characterized in that: The cylinder barrel of the base lifting cylinder (1-2-2) is fixedly connected to the top surface of the corresponding outer lifting frame, and the piston rod of the base lifting cylinder (1-2-2) is fixedly connected to the bottom surface of the inner guide frame (1-2-3).

4. The supporting method of the self-propelled temporary supporting equipment according to claim 1 is characterized in that: When the temporary support equipment is in a supporting state, the column lifting cylinder (2-3) extends to the maximum stroke position, pushes the top beam assembly to rise and support the top plate, and the first support cylinder (6-2) is in the zero stroke position, and the second support cylinder (6-4) is in the maximum stroke position; when the temporary support equipment is in a retracted state, the column lifting cylinder (2-3) is retracted to the zero stroke position, drives the top beam assembly to descend, and the first support cylinder (6-2) is in the maximum stroke position, and the second support cylinder (6-4) is in the zero stroke position.

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