Lateral supporting mechanism for recovery caving area of coal mine hydraulic support

Abstract

The utility model relates to the technical field of coal mine fully-mechanized coal mining equipment, in particular to a lateral supporting mechanism for a coal mine hydraulic support recovery caving area, which comprises at least two groups of temporary supports arranged in parallel, each group of temporary supports comprises a narrow hydraulic support, a lateral pushing oil cylinder and a lateral pushing beam, and the narrow hydraulic support is driven by an independent driving mechanism to step; the fixed end of the side pushing oil cylinder is connected to the narrow hydraulic support, the telescopic end of the side pushing oil cylinder is connected with the side pushing beam, and the side pushing oil cylinder is arranged in the direction perpendicular to the moving direction of the narrow hydraulic support and drives the side pushing beam to be close to or away from the caving area towards the coal mining working face. The caving area is supported by a plurality of supporting logs towards the coal mining working face, and the side pushing beams are distributed up and down. The temporary supports are sequentially and alternately stepped, and the side pushing beams of at least one set of temporary supports abut against the protective side log row. The temporary support acts in sequence, and the side pushing beams support alternately, so that the side protection log row in the mine caving area is always in a supporting state, and the side displacement is avoided to hinder the forward movement of the temporary support.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine fully mechanized mining equipment, in particular to a lateral support mechanism for recovering a caving area of ​​a coal mine hydraulic support and a support method thereof. Background Art

[0002] After coal mining is completed, the hydraulic support needs to be recovered and transported to the mine. How to recover the hydraulic support safely and quickly is an important step-by-step support for the caving area. The support for the caving area is divided into two types: the top support and the bottom support. The displacement of the top support in the caving area (toward the coal mining face) will cause the facilities supporting the top plate to move laterally, causing the support route to deviate from the normal route, making the recovery work impossible. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a lateral support mechanism and a support method for the caving area of ​​a mine, specifically a walking mechanism of two groups of narrow hydraulic supports that alternately support the log rows in the lateral caving area, thereby forming lateral support for the displacement of the caving area and avoiding lateral displacement caused by lateral pressure on the protective equipment during the operation of the recovery hydraulic supports.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the lateral support mechanism of the coal mine hydraulic support recovery caving area includes at least two groups of temporary supports arranged in parallel and capable of following the recovery hydraulic support in step, at least two groups of temporary supports and other covering hydraulic supports form a top support for the recovery caving area, each group of temporary supports includes a narrow hydraulic support, a side thrust cylinder and a side thrust beam, the narrow hydraulic support is driven by an independent driving mechanism to make the narrow hydraulic support move in a straight line along the comprehensive mining working face; the fixed end of the side thrust cylinder is connected to the narrow hydraulic support, the telescopic end of the side thrust cylinder is connected to the side thrust beam, and the side thrust cylinder is arranged perpendicular to the moving direction of the narrow hydraulic support to drive the side thrust beam to approach or move away from the caving area Toward the coal mining face; the caving area toward the coal mining face is supported by a number of upper and lower supporting logs that are fixedly arranged, and the at least two groups of temporary supporting side thrust beams are distributed and arranged up and down; the at least two groups of temporary supports step in turn alternately, and during the stepping of at least two groups of narrow hydraulic supports, one group of narrow hydraulic supports moves forward, the side thrust cylinder is retracted, and the side thrust beam is away from the protective log row formed by the several supporting logs; the other groups of narrow hydraulic supports are fixed, the side thrust cylinders are extended, and the side thrust beams are close to the caving area toward the coal mining face and are supported on the protective log row formed by the several supporting logs, playing a lateral supporting role; during the whole stepping process, there is always at least one group of temporary supporting side thrust beams supported on the protective log row.

[0005] Preferably, the temporary supports are in two groups.

[0006] Furthermore, the narrow hydraulic support includes a supporting top beam, a column jack and a base. A column jack is arranged between the base and the supporting top beam. The supporting top beam is supported on the top of the mine by the ejection of the column jack; the driving mechanism drives the base forward to control the movement of the narrow hydraulic support.

[0007] Furthermore, the supporting top beam comprises a long top beam, a top beam and a shielding beam connected in sequence, and independent side guard plates are respectively arranged on both sides of the long top beam, the top beam and the shielding beam; the side guard plates of the long top beam, the top beam and the shielding beam on the same side are in a straight line to form a row of side guard plate groups; among the at least two groups of temporary supports, several rows of side guard plate groups are parallel to each other; among the at least two groups of temporary supports, a group of temporary supports close to the protective log row is a front temporary support that bears the lateral pressure from the caving area to the coal mining operation face; the narrow hydraulic support of the front temporary support supports the top beam, and the side close to the protective log row is the pressure-bearing side; each side guard plate in at least one row of side guard plate groups on the pressure-bearing side is provided with an independent ejection mechanism, and the ejection mechanism is arranged in the long top beam, the top beam and the shielding beam; the ejection mechanism drives the side guard plate to be ejected and retracted by the side guard plate ejection cylinder.

[0008] Furthermore, a row of side guard plates on the pressure-bearing side are pushed out and retracted synchronously with the front temporary supporting side thrust beams.

[0009] Further, the ejection mechanism is a first ejection mechanism or a second ejection mechanism or a third ejection mechanism; the side guard plate ejection cylinder of the first ejection mechanism is a first side guard plate ejection cylinder, the first ejection mechanism includes a first side guard plate ejection cylinder and a wedge-shaped slider group, the extension direction of the first side guard plate ejection cylinder is consistent with the length extension direction of the supporting top beam, the wedge-shaped slider group includes two wedge-shaped sliders, an active slider and a driven slider, the two wedge-shaped sliders are connected by sliding grooves along the inclined surface, the active slider is connected to the first side guard plate ejection cylinder, the driven slider is connected to the side guard plate, the first side guard plate ejection cylinder is extended and retracted to make the two wedge-shaped sliders slide relative to each other, And drive the side guard plate to be pressed against or away from the protective log row; each side guard plate is ejected by two groups of first ejection mechanisms, and the two groups of first ejection mechanisms are symmetrically arranged; the driven slider is connected to the side guard plate through the side shift frame, and the two driven sliders of the two groups of first ejection mechanisms are connected to the two ends of the side shift frame; a positioning plate is arranged on the side shift frame, and a positioning slot that cooperates with the positioning plate is formed in the supporting top beam, and when the side guard plate is retracted, the positioning plate is assembled into the positioning slot; the sliding grooves of the two wedge-shaped sliders are dovetail grooves or T-shaped grooves; a guide rail is arranged in the supporting top beam, and the active slider is slidably arranged in the guide rail.

[0010] Furthermore, the side guard plate ejection oil cylinder of the second ejection mechanism is a second side guard plate ejection oil cylinder, the second ejection mechanism includes a second side guard plate ejection oil cylinder, a side guard plate ejection inclined iron, a side guard plate ejection iron and a reset spring, the telescopic direction of the second side guard plate ejection oil cylinder is consistent with the length extension direction of the supporting top beam, the telescopic end of the second side guard plate ejection oil cylinder is connected to the side guard plate ejection inclined iron, the side guard plate ejection inclined iron is slidably connected to the guide rail of the supporting top beam along the telescopic direction of the second side guard plate ejection oil cylinder, and the side guard plate ejection iron is perpendicular to the first The two side guard plate ejection cylinders are slidably connected in the supporting top beam in the telescopic direction, the side guard plate ejection iron contacts the inclined surface of the side guard plate ejection inclined surface iron and slides relatively with the side guard plate ejection inclined surface iron, the side guard plate ejection iron is connected to the side guard plate through the side shift frame, each side guard plate is ejected by two groups of second ejection mechanisms, the two groups of second ejection mechanisms are symmetrically arranged, the two side guard plate ejection irons of the two groups of second ejection mechanisms are connected to the two ends of the side shift frame, a reset spring is arranged between the side guard plate and the supporting top beam body, the reset spring is arranged at both ends of the side guard plate and the supporting top beam body.

[0011] Further, the side guard plate ejection cylinder of the third ejection mechanism is a third side guard plate ejection cylinder, and the third ejection mechanism includes a third side guard plate ejection cylinder, a fixed seat and a sliding column. The telescopic direction of the third side guard plate ejection cylinder is perpendicular to the length extension direction of the supporting top beam. The telescopic end of the third side guard plate ejection cylinder is connected to the side guard plate, and the fixed end of the third side guard plate ejection cylinder is fixed in the supporting top beam. A fixed seat is arranged in the supporting top beam. The side guard plate is connected with a sliding column, and the sliding column is slidably arranged in a sliding groove of the fixed seat. Each side guard plate is ejected by two groups of third ejection mechanisms.

[0012] Furthermore, at least the telescopic direction of the side guard plate ejection cylinder in the long top beam is consistent with the length extension direction of the supporting top beam. Since the long top beam is provided with a lap tongue for lap-jointing the front and back hydraulic support, due to the space limitation in the long top beam, the telescopic direction of the side guard plate ejection cylinder in the long top beam needs to be consistent with the length extension direction of the supporting top beam.

[0013] Furthermore, a first ejection mechanism or a second ejection mechanism is arranged in the long top beam; a first ejection mechanism or a second ejection mechanism or a third ejection mechanism is arranged in the top beam; and a first ejection mechanism or a second ejection mechanism or a third ejection mechanism is arranged in the shield beam.

[0014] Furthermore, among the at least two groups of temporary supports, one group of temporary supports close to the log row for protecting the coal mining surface is a front temporary support for bearing the lateral pressure from the caving area to the coal mining operation surface, and the other temporary supports are rear temporary supports. The side thrust beam of the front temporary support is connected to the base through a guide mechanism, and the guide mechanism includes a guide seat, a guide column and a guide sleeve. The guide seat is fixed on the base of the front temporary support, and the guide sleeve is fixed on the guide seat. The guide column is slidably arranged in the guide sleeve. The guide column is fixedly connected to the side thrust beam of the front temporary support, and the fixed end of the side thrust cylinder of the front temporary support is connected to the guide sleeve. The rear temporary support is hinged to the seat, and the telescopic end of the side thrust cylinder of the front temporary support is hinged to the side thrust beam; the side thrust beam of the rear temporary support is connected to the base through a connecting rod mechanism, and the connecting rod mechanism includes a connecting rod seat, a fixed connecting rod and a movable connecting rod, the connecting rod seat is fixed to the base of the rear temporary support, one end of the fixed connecting rod is fixed to the connecting rod seat, the other end of the fixed connecting rod is hinged to one end of the movable connecting rod, and the other end of the movable connecting rod is hinged to the side thrust beam of the rear temporary support, the fixed end of the side thrust cylinder of the rear temporary support is hinged to the connecting rod seat, and the telescopic end of the side thrust cylinder of the rear temporary support is hinged to the side thrust beam.

[0015] Furthermore, the narrow hydraulic support also includes a sliding jack, the supporting top beam includes a long top beam, a top beam and a shielding beam, the shielding beam is connected to the base through two connecting rods, one end of the top beam is hinged to the shielding beam, and the other end of the top beam is fixedly connected to the long top beam, the column jack is connected between the base and the top beam, and the sliding jack is slidably connected to the long top beam; the narrow hydraulic support also includes a slide cylinder, a sliding slide is arranged under the long top beam, the sliding jack is slidably connected in the sliding slide through a sliding slide, the fixed end of the slide cylinder is connected to the shielding beam of the supporting top beam, and the telescopic end of the slide cylinder is connected to the pushing slide.

[0016] Further, the driving mechanism is a stepping oil cylinder, a stepping push rod is slidably connected to the base, the cylinder seat of the stepping oil cylinder is connected to the base, and the piston rod of the stepping oil cylinder is connected to the stepping push rod; the bases of the at least two groups of temporary supports are independently arranged, and the at least two groups of temporary supports of the stepping push rods are fixedly connected by a stepping connecting beam, and the stepping push rods connected by the stepping connecting beam move synchronously. The stepping connecting beam is connected to the front ends of a plurality of stepping push rods.

[0017] A lateral support method for the lateral support mechanism of the coal mine hydraulic support recovery caving area, in the initial state, all the side push beams are against the protective log row formed by a number of supporting logs, the first group of temporary supports moves forward, the side push cylinder is retracted, and the corresponding side push beams are controlled to move away from the protective log row, and the side push beams of the remaining temporary supports are against the protective log row. After the first group of temporary supports moves forward to the position, the side push cylinder extends to control the corresponding side push beams to resist the protective log row, and the second group and subsequent temporary supports repeat the above actions; when the front temporary support close to the protective log row moves forward as an arbitrary sequence, the ejection mechanism controls the side guard plate to perform synchronous action with the side push beam.

[0018] Furthermore, the temporary supports are divided into two groups, including a group of front temporary supports close to the log row for protecting the land and a group of rear temporary supports adjacent to the front temporary supports; the steps of the two groups of temporary supports are as follows:

[0019] Step 1: In the initial state, the slideway cylinders of the two sets of temporary supports extend, the column jacks and the sliding jacks are pushed out, the top of the mine is supported by the supporting top beam, the side push cylinders extend, the side push beams are controlled to press against the protective log row, and the side guard plate push-out cylinders on the pressure-bearing side of the supporting top beam in the front temporary support extend to control the side guard plates to press against the protective log row;

[0020] Step 2: Synchronously extend the stepping cylinders of the front temporary support and the rear temporary support to push the two connected stepping push rods forward on two independent bases;

[0021] Step 3: The front temporary support moves, and the rear temporary support is fixed to maintain the support state. The action steps of the front temporary support are as follows:

[0022] Step 3.1, the column jack, slideway cylinder, sliding jack, side push cylinder and side guard plate ejection cylinder are retracted, and the front temporary support is in a free state;

[0023] Step 3.2: Retract the stepping cylinder, use the stepping push rod as a fixed point, and drag the base and its upper supporting top beam forward as a whole;

[0024] Step 3.3, the slideway cylinder extends, the column jack and the sliding jack push out to support the top of the mine, the side thrust cylinder and the side guard plate push-out cylinder on the pressure side of the supporting top beam extend to support the protective log row, and the front temporary support is fixed;

[0025] Step 4: The front temporary support is fixed and keeps the support state, and the rear temporary support moves. The action steps of the rear temporary support are as follows:

[0026] Step 4.1, the column jack, slideway cylinder, sliding jack and side thrust cylinder are retracted, and the rear temporary support is in a free state;

[0027] Step 4.2: Retract the stepping cylinder, use the stepping push rod as a fixed point, and drag the base and its upper supporting top beam forward as a whole;

[0028] Step 4.3, the slideway cylinder extends, the column jack and the sliding jack push out to support the top of the mine, the side thrust cylinder extends to support the log row of the protection board, and the temporary support is fixed at the rear;

[0029] When moving forward, the order of action of step three and step four is determined according to the order of movement of the front temporary support and the rear temporary support.

[0030] The beneficial effects of the utility model are as follows: the temporary support of the utility model operates sequentially, and the side push beams support alternately, ensuring that when the temporary support moves forward, the protective log row in the mine caving area is always in a supporting state, avoiding the accumulation of caving coal blocks that causes displacement of the caving area and hindering the forward movement of the temporary support. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the layout diagram of underground fully mechanized mining face;

[0032] Figure 2 It is a three-dimensional lateral support mechanism for the mine caving area. Figure 1 ;

[0033] Figure 3 It is a three-dimensional lateral support mechanism for the mine caving area. Figure 2 ;

[0034] Figure 4 It is a three-dimensional lateral support mechanism for the mine caving area. Figure 3 ;

[0035] Figure 5 This is a schematic diagram of the pressure-bearing side of a narrow hydraulic support (one side guard plate is removed);

[0036] Figure 6 This is an enlarged view of the ejection mechanism inside the supporting top beam;

[0037] Figure 7 This is a schematic diagram of the front temporary support;

[0038] Figure 8 This is a schematic diagram of the post-temporary support;

[0039] Fig. 9 The lateral support mechanism of the mine caving area acts one (the stepping push rod extends, and two sets of temporary supports are fixed supports);

[0040] Fig.10 The second action of the lateral support mechanism in the mine caving area (the supporting top beam of the front temporary support is lowered, the side guard plate and the lower side push beam are retracted, the front temporary support is in a free state, and the rear temporary support is fixed);

[0041] Fig.11 Action 3 of the lateral support mechanism in the mine caving area (the front temporary support moves forward to its place);

[0042] Fig.12 The fourth action of the lateral support mechanism in the mine caving area (the upper support top beam of the front temporary support rises to support, the side guard plate and the lower side push beam extend out of the side support, the front temporary support action is completed to form a support state, and the rear temporary support is fixed);

[0043] Fig.13 Action 5 of the lateral support mechanism in the mine caving area (the front temporary support is fixed, the supporting top beam of the rear temporary support is lowered, the middle side push beam is retracted, and the rear temporary support is in a free state);

[0044] Fig.14 Action 6 of the lateral support mechanism in the mine caving area (the front temporary support is fixed and the rear temporary support is moved forward to its place);

[0045] Fig.15 The seventh action of the lateral support mechanism in the mine caving area (the front temporary support fixes the support, the supporting top beam of the rear temporary support rises to support, the middle side push beam extends out of the side support, and the rear temporary support action is completed to form a support state);

[0046] Fig.16 It is a schematic diagram of temporary support with two sliding jacks;

[0047] Fig.17 Schematic diagram of the structure of the second ejection mechanism;

[0048] Fig.18 It is a schematic diagram of the structure of the third ejection mechanism;

[0049] In the figure:

[0050] 1. Narrow hydraulic support, 2. Support top beam, 2.1 Long top beam, 2.2 Top beam, 2.3 Cover beam, 3. Column jack, 4. Base, 5. Two-link rod, 6. Sliding jack, 7. Slideway cylinder, 8. Stepper cylinder, 9. Stepper push rod, 10. Push slide, 11. Push slide, 12. Side guard plate, 13. Side guard plate ejection cylinder, 13.1 First side guard plate ejection cylinder, 13.2 Second side guard plate ejection cylinder, 13.3 Third side guard plate ejection cylinder, 14. Wedge-shaped active slider, 15. Wedge-shaped driven slider, 16. Slide, 17. Side shift frame, 18. Guide rail, 19. Stepper connecting beam, 20. Side guard plate ejection inclined iron, 21. Side guard plate ejection iron, 22. return spring, 23. fixed seat, 24. sliding column;

[0051] 100, front temporary support, 101, lower side push cylinder, 102, lower side push beam, 103, guide seat, 104, guide column, 105, guide sleeve;

[0052] 200, rear temporary support, 201, middle side push cylinder, 202, middle side push beam, 203, connecting rod seat, 204, fixed connecting rod, 205, movable connecting rod;

[0053] 300, Hubang log raft;

[0054] 400. Recover hydraulic supports;

[0055] 500. Protect the hydraulic support. DETAILED DESCRIPTION

[0056] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0057] In the coal mine fully mechanized mining working face under the mine, multiple hydraulic supports are arranged along the coal mine fully mechanized mining working face to support the top of the mine working face, such as Figure 1 As shown, the hydraulic supports are withdrawn one by one in sequence. During the withdrawal process, temporary supports and cover supports are used to replace the withdrawn hydraulic supports for support. As the hydraulic supports are withdrawn one by one, the temporary supports are continuously moved forward along the arrangement direction of the hydraulic supports, each time moving the distance of a hydraulic support. In order to avoid the accumulation of fallen coal blocks in the caving area to squeeze the temporary support, a lateral support mechanism is set on the temporary support to ensure that the temporary support performs side support while providing upper support.

[0058] Example 1

[0059] See attached Figure 1-15The lateral support mechanism of the coal mine hydraulic support recovery caving area includes two sets of temporary supports 100 and 200 arranged in parallel and capable of following the recovery hydraulic support 400 steps. The two sets of temporary supports and other protective hydraulic supports 500 form a top support for the recovery caving area. Each set of temporary supports includes a narrow hydraulic support 1 and a lateral support mechanism connected to the narrow hydraulic support. The lateral support mechanism includes a side thrust cylinder and a side thrust beam. The narrow hydraulic support is driven by an independent driving mechanism to make the narrow hydraulic support move in a straight line along the comprehensive mining working face. The cylinder seat of the side thrust cylinder is hinged on the narrow hydraulic support 1, the piston rod of the side thrust cylinder is hinged to the side thrust beam, and the side thrust cylinder is perpendicular to the moving direction of the narrow hydraulic support. The two sets of temporary support side push beams are arranged in a vertical direction to drive the side push beams to approach or move away from the caving area to the coal mining face; the caving area to the coal mining face is supported by a number of upper and lower supporting logs that are fixedly arranged, and the two sets of temporary support side push beams are distributed and arranged up and down; the two sets of temporary supports step in turn and alternately, and during the walking process of the two sets of narrow hydraulic supports, the first set of narrow hydraulic supports release the lateral support when walking, and the lateral support of the second set of narrow hydraulic supports comes into play; when the second set of narrow hydraulic supports walks, the lateral support of the first set of narrow hydraulic supports is released and the support of the first set of narrow hydraulic supports comes into play, and during the whole walking process, there is always a set of temporary support side push beams against the protective log row formed by a number of supporting logs, so that the two sets of narrow hydraulic supports move in a straight line along the comprehensive mining face.

[0060] The use location of the utility model is the caving area where the hydraulic support is recovered. There are three names for hydraulic supports: one is the recovered hydraulic support, the second is the shield support made of the recovered hydraulic support (the normal recovered hydraulic support is turned 90 degrees), and the third is the narrow hydraulic support of the utility model. Two or more groups of narrow hydraulic supports near the guardrail log row are equipped with lateral support mechanisms such as side thrust cylinders and side thrust beams, which are temporary support. The entire working place of the lateral support mechanism of the utility model is the coal mining face at the end of coal mining (generally there are dozens to more than one hundred hydraulic supports to be recovered).

[0061] Based on the above technical solution, it should be noted that this embodiment takes two groups of temporary supports as an example. In actual use, one or more temporary supports can be added according to the on-site conditions. Only one temporary support can be moved at a time. When a narrow hydraulic support moves forward, the corresponding side thrust cylinder is retracted, and the corresponding side thrust beam is away from the protective log row formed by a number of supporting logs. The remaining narrow hydraulic supports are fixed, the remaining side thrust cylinders are extended, and the remaining side thrust beams are close to the caving area toward the coal mining face and are supported on the protective log row formed by a number of supporting logs.

[0062] Furthermore, of the two groups of temporary supports, the one group of temporary supports close to the log row is a front temporary support that bears the lateral pressure from the caving area to the coal mining face, and the other is a rear temporary support adjacent to the front temporary support. In the two groups of temporary supports, the structural design of the narrow hydraulic support is the same, and the design of the lateral support mechanism is different.

[0063] Furthermore, the narrow hydraulic support 1 includes a supporting top beam 2, a column jack 3, a sliding jack 6, a slide cylinder 7 and a base 4. The column jack 3 is arranged between the base 4 and the supporting top beam 2. The supporting top beam 2 is supported on the top of the mine by the column jack 3. The driving mechanism drives the base 4 to move forward to control the movement of the narrow hydraulic support 1. The driving mechanism is a stepping cylinder 8. A stepping push rod 9 is slidably connected to the base 4. The cylinder seat of the stepping cylinder 8 is hinged on the base 4. The piston rod of the stepping cylinder 8 is hinged on the stepping push rod 9. The bases of the two groups of temporary supports are independently arranged. The front ends of the stepping push rods of the two groups of temporary supports are fixedly connected by a stepping connecting beam. The stepping push rods connected by the stepping connecting beam 19 move synchronously. Stepping connecting sleeves are arranged at both ends of the stepping connecting beam 19 and fixed by pins. The supporting top beam 2 comprises a long top beam 2.1, a top beam 2.2 and a shielding beam 2.3 connected in sequence, the shielding beam 2.3 is connected to the base 4 through two connecting rods 5, one end of the top beam 2.2 is hinged to the shielding beam 2.3, and the other end of the top beam 2.2 is fixedly connected to the long top beam 2.1, the long top beam 2.1 and the top beam 2.2 are in a straight line, and an obtuse angle is formed between the top beam 2.2 and the shielding beam 2.3, the column jack 3 is vertically connected between the base 4 and the top beam 2.2, and the sliding The jack 6 is slidably connected to the long top beam 2.1; a sliding slide 10 is arranged below the long top beam 2.1, and the sliding jack 6 is suspended. The telescopic rod of the sliding jack 6 is hinged on the sliding slide 11, and the support block is connected below the base of the sliding jack 6. When extended, it is supported by the support block and the bottom surface of the mine. The sliding slide 11 is slidably connected in the sliding slide 10, and the fixed end of the slide cylinder 7 is hinged on the shielding beam 2.3 supporting the top beam, and the telescopic end of the slide cylinder 7 is hinged on the sliding slide 11.

[0064] Preferably, each group of temporary support column jacks 3 is two, respectively located at the two ends of the top beam 2.2.

[0065] In one embodiment, each group of temporary supports has one sliding jack 6, which is located in the middle of the long top beam 2.1 when it is pushed out for support, and is retracted to the end of the long top beam 2.1 through the slideway cylinder 7.

[0066] In another embodiment, each set of temporary support has two sliding jacks 6, one of which is located in the middle of the long top beam 2.1 when it is supported, and the other sliding jack 6 is located at the head end of the long top beam 2.1 when it is supported. The two sliding jacks 6 are respectively retracted to the ends of the long top beam 2.1 through two slideway cylinders 7, see Fig.16 .

[0067] Based on the above technical solution, when the two sets of temporary supports are fixed, the slide cylinders 7 of the two narrow hydraulic supports 1 are extended, and the column jacks 3 and the sliding jacks 6 are pushed out to support the top of the mine by supporting the top beam 2. When the two sets of temporary supports move forward, the two stepping cylinders 8 are first extended to push the two stepping push rods 9 forward on the base 4 respectively, and the two stepping push rods 9 are fixed. First, the first group of narrow hydraulic supports is moved, and the other group of narrow hydraulic supports is fixed and supported. The column jack 3 and the sliding jack 6 of the first group of narrow hydraulic supports are retracted, so that the supporting top beam 2 is lowered and out of the supporting state. The first group of narrow hydraulic supports is in a relaxed state, and the first group of slideway cylinders 7 are retracted, and the first group of sliding jacks 6 are retracted; then the first group of stepping cylinders 8 are retracted, and the stepping push rod 9 is used as a fixed point to drag the base 4 and the supporting top beam 2 on it forward as a whole; the first group of slideway cylinders 7 are extended, and the first group of column jacks 3 and sliding jacks 4 are pushed out to support the top of the mine, and the movement of the first group of narrow hydraulic supports is completed, and the second group of narrow hydraulic supports repeat the above actions. The slideway cylinder 7 is retracted, and the first group of sliding jacks 6 are retracted to the end of the long top beam 2.1 to provide moving and turning space for the withdrawal of the hydraulic supports.

[0068] Furthermore, the supporting top beam 2 comprises a long top beam 2.1, a top beam 2.2 and a shielding beam 2.3 connected in sequence, and independent side guard plates 12 are respectively arranged on both sides of the long top beam 2.1, the top beam 2.2 and the shielding beam 2.3; and an ejection mechanism for controlling the telescopic movement of the side guard plates 12 is also arranged in the long top beam 2.1, the top beam 2.2 and the shielding beam 2.3. The ejection mechanism drives the side guard plates to be ejected and retracted through the side guard plate ejection cylinder 13.

[0069] Furthermore, the cylinder seats and telescopic rods of the slideway cylinder 7, the stepping cylinder 8, the side guard plate ejection cylinder 13, the lower side push cylinder 101 and the middle side push cylinder 201 are all connected by a twisted shaft.

[0070] Based on the above technical solution, it should be noted that the lateral support mechanism for the recovery caving area of ​​the coal mine hydraulic support of the utility model includes two groups of temporary supports arranged in parallel and capable of following the recovery hydraulic support step by step. The two groups of temporary supports and other protective hydraulic supports form a top support for the recovery caving area. There are side thrust cylinders (side guard plate ejection cylinders) and side thrust beams (side guard plates) on the narrow hydraulic supports of the two groups of temporary supports. The side support mechanism (side thrust cylinder drives the side thrust beam, and the side guard plate ejection cylinder drives the side guard plate) of the first group of narrow hydraulic supports (front temporary support narrow hydraulic supports) directly supports the log row of the block, and the lateral support mechanism (side thrust cylinder drives the side thrust beam) of the second group of narrow hydraulic supports (rear temporary support narrow hydraulic supports) is to pass through the first group of narrow hydraulic supports horizontally and support the log row of the block. During the walking process of two groups of narrow hydraulic supports, the first group of narrow hydraulic supports releases the lateral support when walking, and the lateral support of the second group of narrow hydraulic supports comes into play; when the second group of narrow hydraulic supports moves, the lateral support of the first group of narrow hydraulic supports is released and comes into play. During the whole process of walking, there is always a group of lateral support mechanisms to support the log row of the state. The two groups of narrow hydraulic supports move in a straight line along the comprehensive mining working face; the fixed end of the side push cylinder is connected to the narrow hydraulic support, the telescopic end of the side push cylinder is connected to the side push beam, and the side push cylinder is arranged perpendicular to the moving direction of the narrow hydraulic support, driving the side push beam to approach or move away from the log row of the state protection in the caving area; the two groups of temporary supporting side push beams are arranged up and down. One group of narrow hydraulic supports retracts the cylinder and moves forward; the other group of narrow hydraulic supports supports laterally. Alternate support and walking.

[0071] The ejection mechanism is a first ejection mechanism, and the long top beam 2.1, the top beam 2.2 and the shielding beam 2.3 are all equipped with the first ejection mechanism.

[0072] Further, the side guard plate ejection oil cylinder 13 of the first ejection mechanism is a first side guard plate ejection oil cylinder 13.1, and the first ejection mechanism includes the first side guard plate ejection oil cylinder 13.1 and a wedge slider group, the wedge slider group includes two wedge sliders, a wedge active slider 14 and a wedge driven slider 15, the two wedge sliders are connected for sliding along the inclined surface through a slide groove 16, the wedge active slider 14 is connected to the first side guard plate ejection oil cylinder 13.1, and the wedge driven slider 15 is connected to the side guard plate 12 through a side shift frame 17. The first side guard plate ejection oil cylinder 13.1 is telescopic to make the two wedge sliders slide relative to each other, thereby driving the side guard plate 12 to abut against or away from the Hubang log row 300; a positioning plate is provided on the side shift frame 17, and a positioning slot that cooperates with the positioning plate is formed in the supporting top beam 2. When the side guard plate 12 is retracted, the positioning plate is assembled into the positioning slot.

[0073] Based on the above technical solution, the slide grooves 16 of the two wedge-shaped sliders are dovetail grooves or T-shaped grooves, which ensure that the connection between the wedge-shaped active slider 14 and the wedge-shaped driven slider 15 is stable and will not separate, and the wedge-shaped driven slider 15 can be pushed out and retracted. A guide track 18 is set in the support top beam 2, and the wedge-shaped active slider 14 is slidably set in the guide track 18 to ensure that the wedge-shaped active slider 14 and the wedge-shaped driven slider 15 are displaced in a predetermined direction.

[0074] The long top beam 2.1, the top beam 2.2 and the shield beam 2.3 are all equipped with a first ejection mechanism with the following three optional assembly modes:

[0075] a. In the first assembly mode, in the two groups of temporary supports, each side guard plate 12 on each side of the two narrow hydraulic supports supporting the top beams 2 is driven by a set of ejection mechanisms, each set of ejection mechanisms is two groups, and the two sets of ejection mechanisms are symmetrically arranged. Each set of the ejection mechanisms includes a first side guard plate ejection oil cylinder 13.1 and a wedge-shaped slider group. Two wedge-shaped driven sliders 15 are connected to the two ends of the side shift frame 17 to ensure that the two ends are evenly stressed when the side guard plate 12 resists the guard log row 300. In this embodiment, in each supporting top beam 2, a set (two groups) of ejection mechanisms are respectively arranged on both sides of the long top beam 2.1, the top beam 2.2 and the shield beam 2.3. Each set of ejection mechanisms is connected to a separate side guard plate 12, and each set of ejection mechanisms is independently arranged and acts synchronously, that is, two sets (four groups) of ejection mechanisms are respectively arranged in the long top beam 2.1, the top beam 2.2 and the shield beam 2.3, and twelve sets (twenty-four groups) of ejection mechanisms are assembled in the two narrow hydraulic supports. When in use, only the narrow hydraulic support close to the protective log row 300 will provide lateral support on the side close to the protective log row 300, that is, only the three sets (six groups) of ejection mechanisms on one side of the long top beam 2.1, top beam 2.2 and protective beam 2.3 are put into use. In this setting mode, the two narrow hydraulic supports can be arranged arbitrarily, and can be adapted to the lateral support of the caving zone in any direction in the mine under different conditions, and has strong versatility.

[0076] b. In the second assembly method, among the two groups of temporary supports, one group of temporary supports close to the protective log row is a front temporary support that bears the lateral pressure from the caving area to the coal mining face, and the other group is a rear temporary support. Each side guard plate 12 on each side of the top beam supported by the narrow hydraulic support of the front temporary support is driven by a set of ejection mechanisms. Each set of ejection mechanisms has two groups, and the two groups of ejection mechanisms are symmetrically arranged. Each group of the ejection mechanisms includes a first side guard plate ejection cylinder 13.1 and a wedge-shaped slider group. Two wedge-shaped driven sliders 15 are connected to the two ends of the side shift frame 17 to ensure that the two ends of the side guard plate 12 are evenly stressed when they are against the protective log row 300. In this embodiment, in the front temporary support support top beam 2, both sides of the long top beam 2.1, top beam 2.2 and shield beam 2.3 are respectively equipped with a set (two groups) of ejection mechanisms, each set of ejection mechanisms is connected to a separate side guard plate 12, and each set of ejection mechanisms is independently set and acts synchronously, that is, in the front temporary support narrow hydraulic support support top beam 2, two sets (four groups) of ejection mechanisms are respectively set in the long top beam 2.1, top beam 2.2 and shield beam 2.3, and a total of six sets (twelve groups) of ejection mechanisms are installed in the front temporary support support top beam, and no ejection mechanism is installed in the rear temporary support support top beam. When in use, only the side of the front temporary support support top beam 2 close to the guard log row 300 will provide lateral support, that is, only the three sets (six groups) of ejection mechanisms on one side of the long top beam 2.1, top beam 2.2 and shield beam 2.3 of the front temporary support narrow hydraulic support support top beam 2 are put into use. In this arrangement, the front temporary support position is fixed and must be set adjacent to the protective log row 300. The narrow hydraulic support top beam at the front temporary support position can adapt to the lateral support of the caving zone in any direction in the mine under different conditions.

[0077] c. In the third assembly mode, of the two groups of temporary supports, one group of temporary supports close to the log row for protecting the state is a front temporary support that bears the lateral pressure from the caving area to the coal mining face, and the other group is a rear temporary support. The narrow hydraulic support of the front temporary support supports the top beam, and the side close to the log row for protecting the state 300 is the pressure-bearing side. Each side guard plate 12 of the narrow hydraulic support supporting the top beam on the pressure-bearing side of the front temporary support is driven by a set of ejection mechanisms, and each set of ejection mechanisms is two groups, and the two groups of ejection mechanisms are symmetrically arranged, and two wedge-shaped driven sliders 15 are connected to the two ends of the side shift frame 17. Each group of the ejection mechanisms includes a first side guard plate ejection cylinder 13.1 and a wedge-shaped slider group, and the two wedge-shaped driven sliders 15 are connected to the two ends of the side shift frame 17 to ensure that the two ends of the side guard plate 12 are evenly stressed when the side guard plate 12 is against the log row for protecting the state 300. In this embodiment, in the front temporary support narrow hydraulic support top beam, the pressure-bearing sides of the long top beam 2.1, top beam 2.2 and shield beam 2.3 are respectively equipped with a set (two groups) of ejection mechanisms, each set of ejection mechanisms is connected to a separate side guard plate 12, and each set of ejection mechanisms is independently set and acts synchronously, that is, in the front temporary support narrow hydraulic support top beam 2, a total of three sets (six groups) of ejection mechanisms are assembled, and no ejection mechanism is assembled in the rear temporary support support top beam. When in use, the three sets (six groups) of ejection mechanisms on the pressure-bearing side of the front temporary support support top beam 2 are all put into use. In this setting mode, the front temporary support has a fixed position and direction, and the pressure-bearing side must be arranged adjacent to the guard log row 300. It is suitable for the situation where the relative position and direction of the caving area and the comprehensive mining face are fixed and the forward direction of the temporary support is unchanged. It is not universal, but it can save costs and reduce equipment costs.

[0078] Based on the above three embodiments, it should be noted that when the ejection mechanism is put into use, the telescopic action of the first side guard plate ejection cylinder 13.1 is the same as the telescopic action of the column jack 3 of the temporary support. When the temporary support is fixed, the corresponding column jack 3 and the first side guard plate ejection cylinder 13.1 are extended to support the mine top and the protective log row respectively. When the temporary support moves forward, the corresponding column jack 3 and the first side guard plate ejection cylinder 13.1 are retracted to put the temporary support in a loose state for easy movement.

[0079] Of the two groups of temporary supports, the one close to the log row for protecting the coal mining surface is the front temporary support that bears the lateral pressure from the caving area to the coal mining face, and the other is the rear temporary support. The designs of the lateral support mechanisms of the two groups of temporary supports are different.

[0080] Furthermore, the lateral support mechanism of the front temporary support 100 includes a lower side push cylinder 101, a lower side push beam 102 and a guide mechanism. The lower side push beam 102 is connected to the base of the front temporary support 100 through the guide mechanism. The guide mechanism includes a guide seat 103, a guide column 104 and a guide sleeve 105. The guide seat 103 is fixed on the base of the front temporary support. The guide sleeve 105 is fixed on the guide seat 103. The guide column 104 is slidably arranged in the guide sleeve 105. The guide column 104 is fixedly connected to the lower side push beam 102. The cylinder seat of the lower side push cylinder 101 is hinged to the guide seat 103, and the piston rod of the lower side push cylinder 101 is hinged to the lower side push beam 102. Since the telescopic distance between the lower side push cylinder 101 and the lower side push beam 102 is relatively short, the lower side push beam 102 moves horizontally, and the stability of the movement process of the lower side push beam 102 is ensured by the guide mechanism.

[0081] The telescopic action of the lower side push cylinder 101 is the same as the telescopic action of the column jack 3 and the side guard plate ejecting cylinder 13 of the front temporary support 100. When the front temporary support 100 is fixed, the corresponding column jack 3, the lower side push cylinder 101 and the side guard plate ejecting cylinder 13 on the pressure side are extended, and the column jack 3 supports the top of the mine, and the lower side push cylinder 101 and the side guard plate ejecting cylinder 13 on the pressure side support the Hubang log row 300. The front temporary support 100, the corresponding column jack 3, the lower side push cylinder 101 and the side guard plate ejecting cylinder 13 on the pressure side are retracted, so that the temporary support is in a loose state for easy movement.

[0082] Preferably, the lower push cylinder 101 and the guide mechanism are in two groups, and the piston rods of the two lower push cylinders 101 are hinged to the two ends of the lower push beam 102 .

[0083] Furthermore, the lateral support mechanism of the rear temporary support 200 includes a middle side push cylinder 201, a middle side push beam 202 and a connecting rod mechanism. The middle side push beam 202 is connected to the base of the rear temporary support 200 through a connecting rod mechanism. The connecting rod mechanism includes a connecting rod seat 203, a fixed connecting rod 204 and a movable connecting rod 205. The connecting rod seat 203 is fixed to the base of the rear temporary support. One end of the fixed connecting rod 204 is fixed to the connecting rod seat 203, and the other end of the fixed connecting rod 204 is hinged to one end of the movable connecting rod 205. The other end of the movable connecting rod 205 is hinged to the middle side push beam 202. The cylinder seat of the middle side push cylinder 201 is hinged to the connecting rod seat 203, and the piston rod of the middle side push cylinder 201 is hinged to the middle side push beam 202. Since the telescopic distance between the middle side push cylinder 201 and the middle side push beam 202 is relatively far, the linear movement of the middle side push beam 202 is unstable and the hydraulic cylinder is easily damaged. Therefore, a connecting rod mechanism is adopted. The middle side push beam 202 is simultaneously subjected to the telescopic force of the middle side push cylinder 201 and the traction force of the connecting rod 204. The middle side push beam 202 moves tiltedly, and the stability of the movement process of the middle side push beam 202 is ensured by the connecting rod mechanism.

[0084] The telescopic action of the middle side push cylinder 201 is the same as the telescopic action of the column jack 3 of the rear temporary support 200. When the rear temporary support 200 is fixed, the corresponding column jack 3 and the middle side push cylinder 201 are extended to support the mine top and the protective log row respectively. When the rear temporary support 200 is in place, the corresponding column jack 3 and the middle side push cylinder 201 are retracted to put the rear temporary support 200 in a loose state for easy movement.

[0085] Preferably, the middle side push cylinder 201 and the connecting rod mechanism are two groups, and the piston rods of the two middle side push cylinders 201 are hinged to the two ends of the middle side push beam 202.

[0086] Based on the above technical solution, it should be noted that if a third group of temporary supports is set behind the rear temporary supports 200, the third group of temporary supports is also provided with a lateral support mechanism, and the third group and subsequent temporary supports adopt the installation method of the lateral support mechanism of the rear temporary supports 200, and the side thrust beams of all temporary supports extend along the direction of the protective log row 300 and are arranged up and down, and the lateral support mechanisms do not interfere with each other when operating.

[0087] Based on the lateral support method of the lateral support mechanism in the caving area of ​​the mine, in the initial state, all the side thrust beams are abutted against the protective log row formed by a number of supporting logs, the first group of temporary supports moves forward, the side thrust cylinder is retracted, and the corresponding side thrust beams are controlled to move away from the protective log row, and the side thrust beams of the second group of temporary supports are abutted against the protective log row. After the first group of temporary supports moves forward to the position, the side thrust cylinder is extended to control the corresponding side thrust beams to abut against the protective log row, and the second group of temporary supports repeats the above actions; when the front temporary support close to the protective log row moves forward in any sequence, the ejection mechanism controls the side guard plate to perform synchronous action with the side thrust beam.

[0088] Furthermore, the temporary supports are divided into two groups, including a group of front temporary supports close to the protective log row and a group of rear temporary supports adjacent to the front temporary supports.

[0089] When the front temporary support is moved forward as the first set of temporary support, the steps of the two sets of temporary support are as follows, see the attached Figure 9-13 , starting from the initial state before the two sets of temporary supports advance for the first time, Fig.13 It is the end state of the two sets of temporary supports at one time, and also the initial state of the next time. Fig.13 Take the initial state as an example:

[0090] Step 1: In the initial state, the slideway cylinders 7 of the two sets of temporary supports are extended, the column jacks 3 and the sliding jacks 6 are pushed out, and the top of the mine is supported by the supporting top beam 2. The two side push cylinders 101 and 201 are extended to control the two side push beams 102 and 202 to resist the protective log row 300. The side guard plate ejection cylinder 13 on the pressure-bearing side of the supporting top beam in the front temporary support 100 is extended to control the side guard plate 12 to resist the protective log row 300.

[0091] Step 2: Synchronously extend the stepping cylinders 8 of the front temporary support 100 and the rear temporary support 200 to push the two connected stepping push rods 9 forward on the two independent bases 4, see Fig. 9 ;

[0092] Step 3: The front temporary support 100 moves, and the rear temporary support 200 remains fixed to maintain the support state. The action steps of the front temporary support 100 are as follows:

[0093] Step 3.1, the column jack 3, slideway cylinder 7, sliding jack 6, side guard plate ejection cylinder 13 and lower side push cylinder 101 of the front temporary support 100 are retracted; at this time, the front temporary support 100 is in a free state, see Fig.10 ;

[0094] Step 3.2, the stepping cylinder 8 of the front temporary support 100 is retracted, and the stepping push rod 9 of the front temporary support 100 is connected to the fixed rear temporary support 200 through the stepping push rod of the rear temporary support 200. The stepping cylinder 8 of the front temporary support 100 uses the stepping push rod 9 of the front temporary support 100 as a fixed point to drag the base 4 of the front temporary support 100 and the supporting top beam 2 thereof forward as a whole, see Fig.11 ;

[0095] Step 3.3, the slideway cylinder 7 of the front temporary support 100 extends, the column jack 3 and the sliding jack 6 of the front temporary support 100 push out to support the top of the mine, the lower side push cylinder 101 and the side guard plate push-out cylinder 13 on the pressure side of the supporting top beam extend to support the guard log row 300, and the front temporary support 100 completes the action to form a supporting state, see Fig.12 ;

[0096] Step 4: The front temporary support 100 is fixed and keeps the support state, and the rear temporary support 200 moves. The action steps of the rear temporary support 200 are as follows:

[0097] Step 4.1: The column jack 3, slideway cylinder 7, sliding jack 6 and middle side push cylinder 201 of the rear temporary support 200 are retracted, and the rear temporary support 200 is in a free state. Fig.13 ;

[0098] Step 4.2, the stepping cylinder 8 of the rear temporary support 200 is retracted, and the stepping push rod 9 of the rear temporary support 200 is connected to the fixed front temporary support 100 as a whole through the stepping push rod of the front temporary support 100. The stepping cylinder 8 of the rear temporary support 200 uses the stepping push rod 9 of the rear temporary support 200 as a fixed point to drag the base 4 of the rear temporary support 200 and its upper supporting top beam 2 forward as a whole, see Fig.14 ;

[0099] Step 4.3, the slideway cylinder 7 of the rear temporary support 200 extends, the column jack 3 and the sliding jack 6 of the rear temporary support 200 push out to support the top of the mine, the middle side push cylinder 201 extends to support the protective log row 300, and the rear temporary support 100 completes the action to form a supporting state, see Fig.15 .

[0100] Furthermore, when moving forward, the order of action of step three and step four is determined according to the order of movement of the front temporary support and the rear temporary support. When the rear temporary support moves forward as the first group of temporary support, the action order is step one, step two, step four, step three.

[0101] Before the two sets of temporary supports are moved, the stepping cylinders 8 of the two sets of temporary supports are extended synchronously, which saves action time and improves processing efficiency. At the same time, the stepping push rod can also be used as a fixed point for the forward movement of the temporary supports.

[0102] In another embodiment, the stepping push rods 9 of the front temporary support 100 and the rear temporary support 200 are independently arranged and mechanically fixed separately, and the specific action steps are as follows:

[0103] Step 1: In the initial state, the slideway cylinders 7 of the two sets of temporary supports are extended, the column jacks 3 and the sliding jacks 6 are pushed out, and the top of the mine is supported by the supporting top beam 2. The two side push cylinders 101 and 201 are extended to control the two side push beams 102 and 202 to resist the protective log row 300. The side guard plate ejection cylinder 13 on the pressure-bearing side of the supporting top beam in the front temporary support 100 is extended to control the side guard plate 12 to resist the protective log row 300.

[0104] Step 2: The front temporary support 100 moves, and the rear temporary support 200 remains fixed to maintain the support state. The action steps of the front temporary support 100 are as follows:

[0105] Step 2.1, the stepping cylinder 8 of the front temporary support 100 extends, pushes the stepping push rod 9 of the front temporary support 100 to move forward on the base 4 of the front temporary support 100, and fixes the stepping push rod 9 of the front temporary support 100;

[0106] Step 2.2, the column jack 3, the slideway cylinder 7, the sliding jack 6, the side guard plate ejection cylinder 13 and the lower side push cylinder 101 of the front temporary support 100 are retracted; at this time, the front temporary support 100 is in a free state;

[0107] Step 2.3, the stepping cylinder 8 of the front temporary support 100 is retracted, and the stepping push rod 9 of the front temporary support 100 is used as a fixed point to drag the base 4 of the front temporary support 100 and the supporting top beam 2 thereof forward as a whole;

[0108] Step 2.4, the slideway cylinder 7 of the front temporary support 100 extends out, the column jack 3 and the sliding jack 6 of the front temporary support 100 push out to support the top of the mine, the lower side push cylinder 101 and the side guard plate push-out cylinder 13 supporting the pressure side of the top beam extend out to support the guard log row 300, and the front temporary support 100 completes the action to form a support state;

[0109] Step 3: The front temporary support 100 is fixed and keeps the support state, and the rear temporary support 200 moves. The action steps of the rear temporary support 200 are as follows:

[0110] Step 3.1, the stepping cylinder 8 of the rear temporary support 200 extends, pushes the stepping push rod 9 of the rear temporary support 200 to move forward on the base 4 of the rear temporary support 200, and fixes the stepping push rod 9 of the rear temporary support 200;

[0111] Step 3.2, the column jack 3, the slideway cylinder 7, the sliding jack 6 and the middle side thrust cylinder 201 of the rear temporary support 200 are retracted, and the rear temporary support 200 is in a free state;

[0112] Step 3.3, retract the stepping cylinder 8 of the rear temporary support 200, and use the stepping push rod 9 of the rear temporary support 200 as a fixed point to drag the base 4 of the rear temporary support 200 and the supporting top beam 2 thereon to move forward as a whole;

[0113] Step 3.4, the slide cylinder 7 of the rear temporary support 200 extends out, the column jack 3 and the sliding jack 6 of the rear temporary support 200 push out to support the top of the mine, the middle side push cylinder 201 extends out to support the protective log row 300, and the rear temporary support 100 completes the action to form a supporting state.

[0114] Furthermore, when moving forward, the order of action of step 2 and step 3 is determined according to the order of movement of the front temporary support and the rear temporary support. When the rear temporary support moves forward as the first group of temporary support, the action order is step 1, step 3, step 2.

[0115] Example 2

[0116] The technical solution of Example 2 is basically the same as that of Example 1, except that the ejection mechanism is a second ejection mechanism, and the long top beam 2.1, the top beam 2.2 and the shielding beam 2.3 are all equipped with the second ejection mechanism.

[0117] Further, the side guard plate ejection oil cylinder 13 of the second ejection mechanism is a second side guard plate ejection oil cylinder 13.2, the second ejection mechanism includes the second side guard plate ejection oil cylinder 13.2, the side guard plate ejection inclined iron 20, the side guard plate ejection iron 21 and the reset spring 22, the telescopic direction of the second side guard plate ejection oil cylinder 13.2 is consistent with the length extension direction of the supporting top beam, the telescopic end of the second side guard plate ejection oil cylinder 13.2 is connected to the side guard plate ejection inclined iron 20, the side guard plate ejection inclined iron 20 is slidably connected to the guide rail 18 of the supporting top beam along the telescopic direction of the second side guard plate ejection oil cylinder, and the side guard plate ejection iron 21 is perpendicular to the second side guard plate ejection oil cylinder. The cylinder 13.2 is slidably connected in the support top beam in the telescopic direction, and the side guard plate ejector iron 21 contacts the inclined surface of the side guard plate ejector inclined iron 20 and slides relatively with the side guard plate ejector inclined iron 20. The side guard plate ejector iron 21 is connected to the side guard plate 12 through the side shift frame, and each side guard plate 12 is ejected by two groups of second ejection mechanisms. The two groups of second ejection mechanisms are symmetrically arranged, and the two side guard plate ejector irons 21 of the two groups of second ejection mechanisms are connected to the two ends of the side shift frame. A reset spring 22 is arranged between the side guard plate 12 and the support top beam body, and the reset spring 22 is arranged at both ends of the side guard plate 12 and the support top beam (long top beam 2.1, top beam 2.2 and shielding beam 2.3) body.

[0118] Furthermore, the second ejection mechanism in the long top beam 2.1, the top beam 2.2 and the shielding beam 2.3 has three optional assembly modes, which are the same as in Example 1.

[0119] Example 3

[0120] The technical solution of Example 3 is basically the same as that of Example 1, except that the ejection mechanism includes a first ejection mechanism and a third ejection mechanism, the first ejection mechanism is installed in the long top beam 2.1, and the third ejection mechanism is installed in the top beam 2.2 and the shielding beam 2.3.

[0121] The side guard plate ejection cylinder of the third ejection mechanism is the third side guard plate ejection cylinder 13.3. The third ejection mechanism includes the third side guard plate ejection cylinder 13.3, a fixed seat 23 and a sliding column 24. The telescopic direction of the third side guard plate ejection cylinder 13.3 is perpendicular to the length extension direction of the top beam 2.2 and the shielding beam 2.3. The telescopic end of the third side guard plate ejection cylinder 13.3 is connected to the side guard plate 12. The fixed end of the third side guard plate ejection cylinder 13.3 is fixed in the top beam 2.2 or the shielding beam 2.3. The fixed seat 23 is arranged in the top beam 2.2 or the shielding beam 2.3. The side guard plate 12 is connected with a sliding column 24. The sliding column 24 is slidably arranged in the sliding groove of the fixed seat 23. Each side guard plate 12 is ejected by two sets of the third ejection mechanism.

[0122] The ejection mechanism of this embodiment has three optional assembly modes, which are the same as those of embodiment 1.

[0123] Example 4

[0124] The technical solution of Example 4 is basically the same as that of Example 1, except that the ejection mechanism includes a second ejection mechanism and a third ejection mechanism. The second ejection mechanism is installed in the long top beam 2.1, and the third ejection mechanism is installed in the top beam 2.2 and the shield beam 2.3.

[0125] The side guard plate ejection oil cylinder 13 of the second ejection mechanism is a second side guard plate ejection oil cylinder 13.2. The second ejection mechanism includes a second side guard plate ejection oil cylinder 13.2, a side guard plate ejection inclined iron 20, a side guard plate ejection iron 21 and a reset spring 22. The telescopic direction of the second side guard plate ejection oil cylinder 13.2 is consistent with the length extension direction of the long top beam. The telescopic end of the second side guard plate ejection oil cylinder 13.2 is connected to the side guard plate ejection inclined iron 20. The side guard plate ejection inclined iron 20 is slidably connected to the guide track 18 of the long top beam along the telescopic direction of the second side guard plate ejection oil cylinder. The side guard plate ejection iron 21 is moved along a direction perpendicular to the guide track 18. The second side guard plate ejection cylinder 13.2 is slidably connected in the long top beam in the extension and contraction direction, and the side guard plate ejection iron 21 contacts the inclined surface of the side guard plate ejection inclined iron 20 and slides relatively with the side guard plate ejection inclined iron 20. The side guard plate ejection iron 21 is connected to the side guard plate 12 through the side shift frame, and each side guard plate 12 is ejected by two groups of second ejection mechanisms. The two groups of second ejection mechanisms are symmetrically arranged, and the two side guard plate ejection irons 21 of the two groups of second ejection mechanisms are connected to the two ends of the side shift frame. A reset spring 22 is arranged between the side guard plate 12 and the supporting top beam body, and the reset spring 22 is arranged at both ends of the side guard plate 12 and the long top beam body.

[0126] The side guard plate ejection cylinder of the third ejection mechanism is the third side guard plate ejection cylinder 13.3. The third ejection mechanism includes the third side guard plate ejection cylinder 13.3, a fixed seat 23 and a sliding column 24. The telescopic direction of the third side guard plate ejection cylinder 13.3 is perpendicular to the length extension direction of the top beam 2.2 and the shielding beam 2.3. The telescopic end of the third side guard plate ejection cylinder 13.3 is connected to the side guard plate 12. The fixed end of the third side guard plate ejection cylinder 13.3 is fixed in the top beam 2.2 or the shielding beam 2.3. The fixed seat 23 is arranged in the top beam 2.2 or the shielding beam 2.3. The side guard plate 12 is connected with a sliding column 24. The sliding column 24 is slidably arranged in the sliding groove of the fixed seat 23. Each side guard plate 12 is ejected by two sets of the third ejection mechanism.

[0127] The ejection mechanism of this embodiment has three optional assembly modes, which are the same as those of embodiment 1.

[0128] It should be noted that the parts not described in detail in the present invention are prior art.

[0129] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A lateral support mechanism for recovering the caving area of ​​a coal mine hydraulic support, characterized in that: It comprises at least two groups of temporary supports arranged in parallel, each group of temporary supports comprises a narrow hydraulic support, a side-thrust cylinder and a side-thrust beam, the narrow hydraulic support is driven by an independent driving mechanism to make the narrow hydraulic support move in a straight line along the fully mechanized mining working face; the fixed end of the side-thrust cylinder is connected to the narrow hydraulic support, the telescopic end of the side-thrust cylinder is connected to the side-thrust beam, the side-thrust cylinder is arranged perpendicular to the moving direction of the narrow hydraulic support, and drives the side-thrust beam to approach or move away from the caving area to the coal mining working face; the caving area to the coal mining working face is supported by a number of upper and lower supporting logs fixedly arranged, and the at least two groups The side thrust beams of temporary support are distributed and arranged up and down; the at least two groups of temporary support are stepped alternately in sequence, and during the stepping of at least two groups of narrow hydraulic supports, one group of narrow hydraulic supports moves forward, the side thrust cylinder is retracted, and the side thrust beam is away from the row of protective logs formed by a number of supporting logs; the other groups of narrow hydraulic supports are fixed, the side thrust cylinders are extended, and the side thrust beams are close to the caving area toward the coal mining operation face and are supported on the row of protective logs formed by a number of supporting logs, playing a lateral support role; during the whole process of stepping, there is always at least one group of temporary support side thrust beams supported on the row of protective logs.

2. A lateral support mechanism for recovering the caving area of ​​a coal mine hydraulic support according to claim 1, characterized in that: The narrow hydraulic support includes a supporting top beam, a column jack and a base. The column jack is arranged between the base and the supporting top beam. The supporting top beam is supported on the top of the mine by the ejection of the column jack. The driving mechanism drives the base forward to control the movement of the narrow hydraulic support.

3. A lateral support mechanism for recovering the caving area of ​​a coal mine hydraulic support according to claim 2, characterized in that: The supporting top beam comprises a long top beam, a top beam and a shielding beam connected in sequence, and independent side guard plates are respectively arranged on both sides of the long top beam, the top beam and the shielding beam; the side guard plates of the long top beam, the top beam and the shielding beam on the same side are in a straight line to form a row of side guard plate groups; in the at least two groups of temporary supports, several rows of side guard plate groups are parallel to each other; in the at least two groups of temporary supports, a group of temporary supports close to the protective log row is a front temporary support that bears the lateral pressure from the caving area to the coal mining working face; the narrow hydraulic support of the front temporary support supports the top beam, and the side close to the protective log row is the pressure-bearing side; each side guard plate in at least one row of side guard plate groups on the pressure-bearing side is provided with an independent ejection mechanism, and the ejection mechanism is arranged in the long top beam, the top beam and the shielding beam; the ejection mechanism drives the side guard plate to be ejected and retracted through the side guard plate ejection cylinder.

4. A lateral support mechanism for recovering the caving area of ​​a coal mine hydraulic support according to claim 3, characterized in that: The ejection mechanism is a first ejection mechanism or a second ejection mechanism or a third ejection mechanism; the side guard plate ejection cylinder of the first ejection mechanism is a first side guard plate ejection cylinder, the first ejection mechanism includes a first side guard plate ejection cylinder and a wedge-shaped slider group, the extension direction of the first side guard plate ejection cylinder is consistent with the length extension direction of the supporting top beam, the wedge-shaped slider group includes two wedge-shaped sliders, an active slider and a driven slider, the two wedge-shaped sliders are connected by sliding grooves along the inclined surface, the active slider is connected to the first side guard plate ejection cylinder, the driven slider is connected to the side guard plate, the first side guard plate ejection cylinder is extended and retracted to make the two wedge-shaped sliders slide relative to each other, thereby driving the side guard plate to be pressed against or away from the Hubang log row; each side guard plate is ejected by two groups of first ejection mechanisms, and the two groups of second ejection mechanisms are connected by two groups of third ejection mechanisms. A ejection mechanism is symmetrically arranged; the driven slide block is connected to the side guard plate through a side shift frame, and the two driven slide blocks of the two groups of first ejection mechanisms are connected at both ends of the side shift frame; a positioning plate is arranged on the side shift frame, and a positioning slot that cooperates with the positioning plate is formed in the support top beam. When the side guard plate is retracted, the positioning plate is assembled into the positioning slot; the sliding grooves of the two wedge-shaped slide blocks are dovetail grooves or T-shaped grooves; a guide rail is arranged in the support top beam, and the active slide block is slidably arranged in the guide rail; the side guard plate ejection cylinder of the second ejection mechanism is a second side guard plate ejection cylinder, and the second ejection mechanism includes a second side guard plate ejection cylinder, a side guard plate ejection inclined iron, a side guard plate ejection iron and a reset spring, and the telescopic direction of the second side guard plate ejection cylinder is consistent with the support top beam The length extension direction of the beam is consistent, the telescopic end of the second side guard plate ejection oil cylinder is connected to the side guard plate ejection inclined plane iron, the side guard plate ejection inclined plane iron is slidably connected to the guide rail of the supporting top beam along the telescopic direction of the second side guard plate ejection oil cylinder, the side guard plate ejection iron is slidably connected to the supporting top beam along the telescopic direction perpendicular to the second side guard plate ejection oil cylinder, the side guard plate ejection iron contacts with the inclined surface of the side guard plate ejection inclined plane iron and slides relatively with the side guard plate ejection inclined plane iron, the side guard plate ejection iron is connected to the side guard plate through the side shift frame, each side guard plate is ejected by two groups of second ejection mechanisms, the two groups of second ejection mechanisms are symmetrically arranged, the two side guard plate ejection irons of the two groups of second ejection mechanisms are connected to the two ends of the side shift frame, and there is a A return spring is arranged, and the return spring is arranged at both ends of the side guard plate and the supporting top beam main body; the side guard plate ejecting cylinder of the third ejecting mechanism is a third side guard plate ejecting cylinder, and the third ejecting mechanism includes a third side guard plate ejecting cylinder, a fixed seat and a sliding column. The telescopic direction of the third side guard plate ejecting cylinder is perpendicular to the length extension direction of the supporting top beam. The telescopic end of the third side guard plate ejecting cylinder is connected to the side guard plate, and the fixed end of the third side guard plate ejecting cylinder is fixed in the supporting top beam. A fixed seat is arranged in the supporting top beam, and the side guard plate is connected with a sliding column. The sliding column is slidably arranged in the sliding groove of the fixed seat, and each side guard plate is ejected by two groups of third ejecting mechanisms; at least the telescopic direction of the side guard plate ejecting cylinder in the long top beam is consistent with the length extension direction of the supporting top beam.

5. A lateral support mechanism for recovering the caving area of ​​a coal mine hydraulic support according to claim 4, characterized in that: The long top beam is provided with a first ejection mechanism or a second ejection mechanism; the top beam is provided with a first ejection mechanism, a second ejection mechanism or a third ejection mechanism; the shield beam is provided with a first ejection mechanism, a second ejection mechanism or a third ejection mechanism.

6. A lateral support mechanism for recovering a caving area of ​​a coal mine hydraulic support according to any one of claims 2 to 5, characterized in that: Among the at least two groups of temporary supports, one group of temporary supports close to the log row for protecting the land is a front temporary support that bears the lateral pressure from the caving area to the coal mining operation surface, and the other temporary supports are rear temporary supports. The side thrust beam of the front temporary support is connected to the base through a guide mechanism, and the guide mechanism includes a guide seat, a guide column and a guide sleeve. The guide seat is fixed on the base of the front temporary support, and the guide sleeve is fixed on the guide seat. The guide column is slidably arranged in the guide sleeve. The guide column is fixedly connected to the side thrust beam of the front temporary support, and the fixed end of the side thrust cylinder of the front temporary support is connected to the guide seat. Hinge, the telescopic end of the side thrust cylinder of the front temporary support is hinged to the side thrust beam; the side thrust beam of the rear temporary support is connected to the base through a connecting rod mechanism, the connecting rod mechanism includes a connecting rod seat, a fixed connecting rod and a movable connecting rod, the connecting rod seat is fixed to the base of the rear temporary support, one end of the fixed connecting rod is fixed to the connecting rod seat, the other end of the fixed connecting rod is hinged to one end of the movable connecting rod, the other end of the movable connecting rod is hinged to the side thrust beam of the rear temporary support, the fixed end of the side thrust cylinder of the rear temporary support is hinged to the connecting rod seat, and the telescopic end of the side thrust cylinder of the rear temporary support is hinged to the side thrust beam.

7. A lateral support mechanism for recovering a caving area of ​​a coal mine hydraulic support according to any one of claims 2 to 5, characterized in that: The narrow hydraulic support also includes a sliding jack, the supporting top beam includes a long top beam, a top beam and a shielding beam connected in sequence, the shielding beam is connected to the base through two connecting rods, one end of the top beam is hinged to the shielding beam, and the other end of the top beam is fixedly connected to the long top beam, the column jack is connected between the base and the top beam, and the sliding jack is slidably connected to the long top beam.

8. A lateral support mechanism for recovering a caving area of ​​a coal mine hydraulic support according to claim 7, characterized in that: The narrow hydraulic support also includes a slide cylinder, a push slide is arranged under the long top beam, a sliding jack is slidably connected in the push slide through a push slide, a fixed end of the slide cylinder is connected to a shield beam supporting the top beam, and a telescopic end of the slide cylinder is connected to the push slide.

9. A lateral support mechanism for recovering a caving area of ​​a coal mine hydraulic support according to any one of claims 2 to 5, characterized in that: The driving mechanism is a stepping cylinder, a stepping push rod is slidably connected to the base, the cylinder seat of the stepping cylinder is connected to the base, the piston rod of the stepping cylinder is connected to the stepping push rod, the at least two groups of temporary support bases are independently arranged, the at least two groups of temporary support stepping push rods are fixedly connected by a stepping connecting beam, and the stepping push rods connected by the stepping connecting beam move synchronously.

10. A lateral support mechanism for recovering a caving area of ​​a coal mine hydraulic support according to any one of claims 2 to 5, characterized in that: The temporary supports are divided into two groups.

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