Gate-type forepoling for coal mine

Abstract

The utility model provides a gate-type forepoling for a coal mine, which relates to the technical field of coal seam mining and comprises a plurality of groups of unit support bodies, each unit support body comprises a front group of portals and a rear group of telescopic jacks, and the number of the telescopic jacks is four. The four telescopic jacks are arranged below the position between the two sets of portal frames in a bilateral symmetry mode. The portal frame comprises two groups of bottom sliding shoes and two groups of square cylinders; the front group of portal frames and the rear group of portal frames of each unit support body stretch out through the telescopic stand columns to enable the top beams to be connected with the top at the same time, the end roadway temporary supporting effect is achieved, then the portal frame on the rear side serves as a fulcrum, the telescopic stand columns of the portal frame on the front side are lowered, and then the telescopic jacks are adjusted to push the portal frame on the front side to slide forwards. The rear side door frame slides forwards according to the same steps to complete self-moving of the support, so that a multi-column supporting type structure is adopted, the whole frame is good in stability, high in reliability and small in initial supporting force, and a top plate is easy to control.

Description

Technical Field

[0001] The utility model relates to the technical field of coal seam mining, in particular to a portal-type advance support for coal mines. Background Art

[0002] During coal seam mining, under the action of the stope and advance support, the mine pressure in the advance section of the two tunnels is severe, especially in the air tunnel. The traditional advance support of the air tunnel adopts the form of single column plus beam, which has the following problems:

[0003] 1. The support strength of the single column is low. Under the action of the advance support pressure, the top plate of the advance section is prone to sinking and damage;

[0004] 2. The process of repeatedly supporting and removing pillars can easily lead to the breaking of the roof, the blockage of the tail lane safety exit, and even local roof collapse and other accidents;

[0005] 3. The support column process still needs to be assisted by manual labor to complete the support operation, which greatly increases the labor intensity of workers, resulting in low support efficiency and poor safety performance;

[0006] 4. The single column support has poor stability and poor adaptability to more complex tunnels, which greatly restricts its support range;

[0007] Therefore, the utility model proposes a portal-type advance support for coal mines to solve the problems existing in the prior art. Utility Model Content

[0008] In view of the above problems, the utility model proposes a portal-type advance support for coal mines. The portal-type advance support for coal mines adopts a multi-column support structure. The overall frame has good stability, high reliability, small initial support force and easy roof control, which greatly improves the degree of mechanization, reduces the labor intensity of workers, and greatly improves support efficiency, quality and safety.

[0009] To achieve the purpose of the utility model, the utility model is implemented by the following technical solutions: a gantry advance support for coal mines, comprising a plurality of unit support bodies, wherein the unit support bodies comprise a gantry and a telescopic jack, wherein the gantry is provided with two front and rear groups, and the telescopic jack is provided with four, and the four telescopic jacks are symmetrically arranged at the bottom between the two groups of the gantry;

[0010] The door frame includes a bottom sliding shoe and a square tube, and the bottom sliding shoe and the square tube are each provided with two groups. The two groups of square tubes are respectively arranged above the two groups of bottom sliding shoes, and telescopic columns are arranged inside the two groups of square tubes. A top beam is arranged above the two groups of telescopic columns, and cantilever beams are hinged on both sides of the top beam through connecting ears. A plurality of cantilever beams are equidistantly arranged. A side adjustment hydraulic cylinder is arranged on one side of the top of the bottom sliding shoe, and the side adjustment hydraulic cylinder is provided with two groups, and the output ends of the two groups of side adjustment hydraulic cylinders are in opposite directions.

[0011] A further improvement is that the output end of the telescopic jack is hinged to the bottom sliding shoe of the front door frame, and the cylinder end of the telescopic jack is hinged to the bottom sliding shoe of the rear door frame.

[0012] A further improvement is that the upper and lower ends of the telescopic column are both hemispherical, the lower end of the telescopic column is inserted into the column socket of the square tube and is fixedly connected to the bottom sliding shoe through a first column pin, and the output end of the telescopic column is hingedly connected to the top beam through a second column pin.

[0013] A further improvement is that a limit plate is provided on the top of the square tube, and the limit plate is fixed to the square tube by bolts, and the telescopic column passes through the limit plate and is fixed.

[0014] A further improvement is that a support plate is provided on one side of the top of the bottom sliding shoe, and the side adjustment hydraulic cylinder is arranged above the support plate.

[0015] A further improvement is that a reinforcing rib is connected between one side of the bottom of the support plate and the bottom sliding shoe, and a plurality of groups of the reinforcing ribs are arranged at equal intervals.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the utility model, the front and rear two groups of door frames of each unit support body are extended through telescopic columns to make the top beam touch the top at the same time, which plays the role of temporary support for the end tunnel. Then, the door frame on the rear side is used as a fulcrum, the telescopic columns of the door frame on the front side are lowered, and the telescopic jack is adjusted to push the door frame on the front side to slide forward. The door frame on the rear side slides forward according to the same steps to complete the self-movement of the support. Therefore, a multi-column support structure is adopted, and the overall frame has good stability and high reliability. The initial support force is small and easy to control the top plate, which greatly improves the degree of mechanization, reduces the labor intensity of workers, and greatly improves the support efficiency, quality and safety.

[0018] 2. The utility model adopts an integrally hinged top beam and cantilever beam structure with a large supporting area and good top connection, which is beneficial to maintaining the integrity of the end tunnel roof and is convenient for transportation, installation and disassembly. The telescopic column is hingedly connected to the top beam through the second column pin, which can adapt to tunnel roofs with different degrees of inclination and realize complete support for the end tunnel roof.

[0019] 3. The bottom sliding shoe of the utility model is provided with a side adjustment hydraulic cylinder for adjusting the displacement posture of the bracket, and the walking posture of the gantry is adjusted by contacting with the outer side wall or the inner side scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the front view of the utility model;

[0021] Figure 2 It is a schematic diagram of the door frame of the utility model;

[0022] Figure 3 It is a three-dimensional schematic diagram of the utility model;

[0023] Figure 4 It is a schematic diagram of multiple groups of unit bracket bodies of the utility model.

[0024] Among them: 1. Door frame; 2. Telescopic jack; 3. Bottom sliding shoe; 4. Square tube; 5. Telescopic column; 6. Top beam; 7. Cantilever beam; 8. Side adjustment hydraulic cylinder; 9. First column pin; 10. Second column pin; 11. Limit plate; 12. Support plate; 13. Strengthening rib. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0026] Embodiment 1

[0027] according to Figure 1 , 2 As shown in , 3 and 4, this embodiment proposes a gantry advance support for coal mines, comprising a plurality of unit support bodies, wherein the unit support bodies comprise a gantry 1 and a telescopic jack 2, wherein the gantry 1 is provided with two front and rear groups, and the telescopic jack 2 is provided with four, and the four telescopic jacks 2 are symmetrically arranged at the bottom between the two groups of the gantry 1;

[0028] The door frame 1 includes a bottom sliding shoe 3 and a square tube 4, and the bottom sliding shoe 3 and the square tube 4 are each provided with two groups. The two groups of square tubes 4 are respectively arranged above the two groups of bottom sliding shoes 3, and telescopic columns 5 are arranged inside the two groups of square tubes 4. A top beam 6 is arranged above the two groups of telescopic columns 5, and cantilever beams 7 are hinged on both sides of the top beam 6 through connecting ears. A plurality of cantilever beams 7 are equidistantly arranged. A side adjustment hydraulic cylinder 8 is arranged on one side of the top of the bottom sliding shoe 3, and the side adjustment hydraulic cylinder 8 is provided with two groups, and the output ends of the two groups of side adjustment hydraulic cylinders 8 are in opposite directions. When in use, it moves to the end position, and the two groups of door frames 1 in front and behind each unit bracket body are extended through the telescopic columns 5 to make the top beam 6 touch the top at the same time, which plays the role of temporary support for the end tunnel. The maximum support height can reach 4500mm. Then, with the rear door frame 1 as the fulcrum, the front door frame 1 telescopic columns 5 are lowered and the telescopic jack 2 is adjusted to push the front door frame 1 to slide forward. The rear door frame 1 slides forward according to the same steps to complete the self-movement of the bracket, and the above actions are repeated to carry out the next cycle operation.

[0029] The output end of the telescopic jack 2 is hinged to the bottom sliding shoe 3 of the front mast 1, and the cylinder end of the telescopic jack 2 is hinged to the bottom sliding shoe 3 of the rear mast 1. When in use, the rear mast 1 is used as a fulcrum, the telescopic column 5 of the front mast 1 is lowered, and then the telescopic jack 2 is adjusted to push the front mast 1 to slide forward, and the rear mast 1 slides forward in the same steps to complete the self-movement of the bracket.

[0030] The upper and lower ends of the telescopic column 5 are both hemispherical. The lower end of the telescopic column 5 is inserted into the column socket of the square tube 4 and fixedly connected to the bottom sliding shoe 3 through the first column pin 9. The output end of the telescopic column 5 is hingedly connected to the top beam 6 through the second column pin 10. When in use, the telescopic column is hingedly connected to the top beam 6 through the second column pin 10. The spherical hinge method can prevent the telescopic column 5 from being damaged by lateral loads. The telescopic column 5 adopts a two-stage telescopic cylinder system, and all can be independently controlled. It can adapt to the roadway roof with different degrees of inclination, and can achieve complete support for the end roadway roof.

[0031] A limit plate 11 is provided on the top of the square tube 4, and the limit plate 11 is fixed to the square tube 4 by bolts, and the telescopic column 5 passes through the limit plate 11 and is fixed. The telescopic column 5 is limited by the first column pin 9 and the limit plate 11 to prevent it from falling out of the column socket of the square tube 4 during the lifting process.

[0032] Embodiment 2

[0033] according to Figure 1 , 2As shown in , 3 and 4, this embodiment proposes a gantry advance support for coal mines, comprising a plurality of unit support bodies, wherein the unit support bodies comprise a gantry 1 and a telescopic jack 2, wherein the gantry 1 is provided with two front and rear groups, and the telescopic jack 2 is provided with four, and the four telescopic jacks 2 are symmetrically arranged at the bottom between the two groups of the gantry 1;

[0034] The door frame 1 includes a bottom sliding shoe 3 and a square tube 4, and the bottom sliding shoe 3 and the square tube 4 are each provided with two groups. The two groups of square tubes 4 are respectively arranged above the two groups of bottom sliding shoes 3, and telescopic columns 5 are arranged inside the two groups of square tubes 4. A top beam 6 is arranged above the two groups of telescopic columns 5, and cantilever beams 7 are hinged on both sides of the top beam 6 through connecting ears. A plurality of cantilever beams 7 are equidistantly arranged. A side adjustment hydraulic cylinder 8 is arranged on one side of the top of the bottom sliding shoe 3, and the side adjustment hydraulic cylinder 8 is provided with two groups, and the output ends of the two groups of side adjustment hydraulic cylinders 8 are in opposite directions. When in use, it moves to the end position, and the two groups of door frames 1 in front and behind each unit bracket body are extended through the telescopic columns 5 to make the top beam 6 touch the top at the same time, which plays the role of temporary support for the end tunnel. The maximum support height can reach 4500mm. Then, with the rear door frame 1 as the fulcrum, the front door frame 1 telescopic columns 5 are lowered and the telescopic jack 2 is adjusted to push the front door frame 1 to slide forward. The rear door frame 1 slides forward according to the same steps to complete the self-movement of the bracket, and the above actions are repeated to carry out the next cycle operation.

[0035] The output end of the telescopic jack 2 is hinged to the bottom sliding shoe 3 of the front mast 1, and the cylinder end of the telescopic jack 2 is hinged to the bottom sliding shoe 3 of the rear mast 1. When in use, the rear mast 1 is used as a fulcrum, the telescopic column 5 of the front mast 1 is lowered, and then the telescopic jack 2 is adjusted to push the front mast 1 to slide forward, and the rear mast 1 slides forward in the same steps to complete the self-movement of the bracket.

[0036] A support plate 12 is provided on one side of the top of the bottom sliding shoe 3, and the side adjustment hydraulic cylinder 8 is provided above the support plate 12. A reinforcing rib 13 is connected between one side of the bottom of the support plate 12 and the bottom sliding shoe 3, and a plurality of groups of reinforcing ribs 13 are provided at equal intervals to improve the support stability of the side adjustment hydraulic cylinder 8.

[0037] The utility model adopts a multi-column support structure, and the overall frame has good stability, high reliability, small initial support force, and is easy to control the top plate, which greatly improves the degree of mechanization, reduces the labor intensity of workers, and greatly improves the support efficiency, quality and safety. In addition, the utility model adopts an integrally hinged top beam 6 and cantilever beam 7 structure, which has a large support area and good top connection, is conducive to maintaining the integrity of the top plate of the end lane, and is convenient for transportation, installation and disassembly. The telescopic column is hingedly connected with the top beam 6 through the second column pin 10, which can adapt to the top plates of lanes with different degrees of inclination, and can achieve complete support for the top plate of the end lane. At the same time, the bottom sliding shoe 3 of the utility model is provided with a side adjustment hydraulic cylinder 8 for adjusting the displacement posture of the bracket, and the walking posture of the gantry is adjusted by contacting with the outer side wall or the inner side scraper.

[0038] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A portal type advance support for coal mines, comprising a plurality of unit support bodies, characterized in that: The unit support body comprises a door frame (1) and a telescopic jack (2), wherein the door frame (1) is provided with two front and rear groups, and the telescopic jack (2) is provided with four, and the four telescopic jacks (2) are arranged symmetrically below the two groups of door frames (1). The door frame (1) comprises a bottom sliding shoe (3) and a square tube (4), wherein the bottom sliding shoe (3) and the square tube (4) are each provided with two groups, the two groups of the square tubes (4) are respectively provided above the two groups of the bottom sliding shoe (3), and the insides of the two groups of the square tubes (4) are each provided with a telescopic column (5), a top beam (6) is provided above the two groups of the telescopic columns (5), and both sides of the top beam (6) are hinged with a cantilever beam (7) through a connecting ear, and a plurality of groups of the cantilever beams (7) are provided at equal intervals, and a side adjustment hydraulic cylinder (8) is provided on one side of the top of the bottom sliding shoe (3), and the side adjustment hydraulic cylinder (8) is provided with two groups, and the output ends of the two groups of the side adjustment hydraulic cylinders (8) are in opposite directions.

2. A gantry type advance support for coal mines according to claim 1, characterized in that: The output end of the telescopic jack (2) is hinged to the bottom sliding shoe (3) of the front door frame (1), and the cylinder end of the telescopic jack (2) is hinged to the bottom sliding shoe (3) of the rear door frame (1).

3. The gantry type advance support for coal mines according to claim 1, characterized in that: The upper and lower ends of the telescopic column (5) are both hemispherical, the lower end of the telescopic column (5) is inserted into the column socket of the square tube (4) and is fixedly connected to the bottom sliding shoe (3) via a first column pin (9), and the output end of the telescopic column (5) is hingedly connected to the top beam (6) via a second column pin (10).

4. A gantry type advance support for coal mines according to claim 3, characterized in that: A limiting plate (11) is provided on the top of the square tube (4), and the limiting plate (11) is fixed to the square tube (4) by means of bolts, and the telescopic column (5) passes through the limiting plate (11) and is fixed.

5. The gantry type advance support for coal mines according to claim 1, characterized in that: A support plate (12) is provided on one side of the top of the bottom sliding shoe (3), and the side adjustment hydraulic cylinder (8) is arranged above the support plate (12).

6. A gantry type advance support for coal mines according to claim 5, characterized in that: A reinforcing rib (13) is connected between one side of the bottom of the support plate (12) and the bottom sliding shoe (3), and a plurality of groups of the reinforcing ribs (13) are arranged at equal intervals.

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