Top coal caving hydraulic support for steeply inclined coal seam and top coal caving coal mining device

Abstract

The utility model relates to the field of coal mining, discloses a top coal caving hydraulic support for a steeply inclined coal seam and a top coal caving mining device, and can effectively relieve the problems of insufficient safety support space and poor reliability of equipment. The hydraulic support comprises a first single frame set and a second single frame set. The first single frame group comprises two first single frames, and the second single frame group comprises two second single frames; each single frame comprises a base, a top beam and a driving stand column. The driving stand column is installed on the base and is in transmission connection with the top beam. The first end of the base in one first single frame is in transmission connection with the second end of the base in the other first single frame through a first pushing mechanism; the first end of the base in one second single frame is in transmission connection with the second end of the base in the other second single frame through a second pushing mechanism; and in the first single frame group and the second single frame group, the middle top beam of each first single frame is in transmission connection with the middle top beam of each second single frame through a frame connecting mechanism.

Description

Technical Field

[0001] This application relates to the field of coal mining technology, and in particular to a hydraulic support for top coal caving in steeply inclined coal seams and a top coal caving mining device. Background Technology

[0002] For steeply inclined coal seams, especially those less than 8 meters thick and with an inclination greater than 45 degrees, the mining process has previously employed flexible shield support mining method and small-stage coal seam hydraulic support mining technology. Single props are often used for support mining, but the equipment has low reliability and poor safety performance. Utility Model Content

[0003] This application discloses a hydraulic support for top coal caving in steeply inclined coal seams and a top coal caving mining device, which can effectively alleviate the problems of insufficient safety support space and poor reliability of equipment.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, embodiments of this application provide a hydraulic support for caving top coal in a steeply inclined coal seam, comprising: a first single-frame group and a second single-frame group;

[0006] The first single-frame group includes two first single frames and a first pushing mechanism, and the second single-frame group includes two second single frames and a second pushing mechanism;

[0007] Each frame in the first frame group and the second frame group includes a base, a top beam, and a drive column; the drive column is mounted on the base and is drivenly connected to the top beam.

[0008] The two first frames are arranged along a first direction, and the first end of the base of one first frame is connected to the second end of the base of the other first frame through the first pushing mechanism.

[0009] The two second frames are arranged in a first direction, and the first end of the base in one second frame is connected to the second end of the base in the other second frame through the second pushing mechanism; the first direction is the extension direction of the top beam in any frame of the first frame group and the second frame group;

[0010] In the first frame group and the second frame group, each first frame and one second frame are arranged along a second direction, and the top beam in each first frame and the top beam in one second frame are connected by a connecting mechanism; the second direction is perpendicular to the first direction.

[0011] The aforementioned hydraulic support for top-coal caving in steeply inclined coal seams comprises two sets of individual supports: a first set and a second set. The first set consists of two first supports 111, and the second set consists of two second supports 121. The two first supports 111 are connected by a first pushing mechanism for self-movement; the two second supports 121 are connected by a second pushing mechanism for self-movement. To prevent the two first supports and two second supports from collapsing during movement, one first support and one second support are connected as a whole by a connecting mechanism.

[0012] Taking the stepping self-movement of the first single frame group as an example, the two ends of the first pushing mechanism are connected to the bases of the two first single frames respectively. The first pushing mechanism is a pushing jack. One end of the pushing jack is hinged to the base of one first single frame, and the other end is hinged to the base of the other first single frame. When stepping self-movement is required, the top beam of the first single frame abuts against the roof of the tunnel under the action of the driving column, so that the first single frame is fixed in the tunnel; then the pushing jack pushes the second single frame forward; subsequently, the top beam of the second single frame abuts against the roof of the tunnel under the action of the driving column, so that the second single frame is fixed in the tunnel; finally, the top beam of the first single frame descends under the action of the driving column and contacts the tunnel to a fixed state, and the pushing jack pulls the first single frame forward.

[0013] Based on the fact that both the first and second single-frame groups can move independently, the top beams of each first single frame in the first single-frame group and the top beams of each second single frame in the second single-frame group are connected to each other through two connecting mechanisms. This not only does not affect the independent movement in the first direction, but also prevents the self-movement in the second direction during the independent movement, thereby improving the safety and reliability of the entire hydraulic support.

[0014] In some embodiments, the second frame includes a hinged beam, a swing drive mechanism, a tail beam, and a tail beam drive mechanism;

[0015] One end of the hinged beam is hinged to the top beam, and the other end is hinged to the tail beam; one end of the swing drive mechanism is hinged to the base, and the other end is hinged to the hinged beam, for driving the hinged beam to swing relative to the top beam; one end of the tail beam drive mechanism is hinged to the hinged beam, and the other end is hinged to the tail beam, for driving the tail beam to swing relative to the hinged beam.

[0016] In each of the second frames, the hinged beam is located on the side of the second frame away from the first frame.

[0017] In some embodiments, a plate and a plate drive mechanism are installed on the side of the tail beam opposite to the hinged beam;

[0018] One end of the insert plate driving mechanism is connected to the tail beam, and the other end is connected to the insert plate for driving the insert plate to slide relative to the tail beam along the extension direction of the tail beam.

[0019] In some embodiments, along the first direction, both ends of the first single frame group and both ends of the second single frame group are connected to a shield structure.

[0020] The protective structure includes protective beams, baffles, and connecting rods;

[0021] In either the first frame group or the second frame group, one end of the protective beam is hinged to the top beam, and the other end is rotatably connected to the base via a connecting rod; the baffle is connected to the end of the protective beam opposite to the top beam.

[0022] In some embodiments, each of the first frames includes a forward beam connected to a top beam; the forward beam in each of the first frames is located on the side of the first frame opposite to the second frame.

[0023] Secondly, this application also provides a top-coal caving mining device for steeply inclined coal seams, including: a main roadway, an assembly roadway, and a hydraulic support for top-coal caving of steeply inclined coal seams as described in any one of the first aspects.

[0024] The assembly tunnel and the main tunnel are sealed and connected for return air;

[0025] The hydraulic support for top coal caving in the steeply inclined coal seam is located inside the main roadway; and the main roadway extends along the first direction.

[0026] In some embodiments, the assembly tunnel includes a plurality of sequentially connected square barrel structural members, each of the square barrel structural members including a plurality of quick-assembly plates, the plurality of quick-assembly plates being spliced ​​together to form a ring structure.

[0027] In some embodiments, the coal mining device further includes a scraper conveyor; the scraper conveyor is located below the tail beam of the hydraulic support;

[0028] The conveying direction of the scraper conveyor is the same as the extension direction of the main roadway.

[0029] In some embodiments, the coal mining apparatus further includes a pre-splitting mechanism; the pre-splitting mechanism includes a drilling rig located between the two second frames and above the scraper conveyor.

[0030] In some embodiments, the pre-splitting mechanism further includes an air cannon and / or a high-pressure water gun. Attached Figure Description

[0031] Figure 1A schematic diagram of the structure of a hydraulic support for top coal caving in a steeply inclined coal seam, provided in this application embodiment. Figure 1 ;

[0032] Figure 2 A schematic diagram of the structure of a hydraulic support for top coal caving in a steeply inclined coal seam, provided in this application embodiment. Figure 2 ;

[0033] Figure 3 A schematic diagram of the structure of a hydraulic support for top coal caving in a steeply inclined coal seam, provided in this application embodiment. Figure 3 ;

[0034] Figure 4 This is a schematic diagram of the structure of the first single frame group in a hydraulic support for top coal caving in a steeply inclined coal seam, provided in an embodiment of this application.

[0035] Figure 5 A schematic diagram of a top-coal caving mining device for steeply inclined coal seams provided in this application embodiment;

[0036] Figure 6 A schematic diagram of the layout of a top-coal caving mining device for steeply inclined coal seams provided in this application embodiment;

[0037] Icons: 100-Hydraulic support; 110-First single-frame group; 120-Second single-frame group; 130-Connecting mechanism; 111-First single frame; 112-First pushing mechanism; 121-Second single frame; 122-Second pushing mechanism; 1111-Base; 1112-Top beam; 1113-Drive column; 1114-Cover structure; 1115-Forward extension beam; 11141-Cover beam; 11142-Baffle; 11143 - First connecting rod; 11144 - Second connecting rod; 1211 - Base; 1212 - Top beam; 1213 - Drive column; 1214 - Hinge beam; 1215 - Swing drive mechanism; 1216 - Tail beam; 1217 - Tail beam drive mechanism; 1218 - Insert plate; 1219 - Insert plate drive mechanism; 200 - Main roadway; 300 - Assembly roadway; 400 - Scraper conveyor; 500 - Pre-splitting mechanism. Detailed Implementation

[0038] First, let me introduce the application scenario of this application: Existing top coal caving hydraulic supports usually adopt a two-column or four-column form, which is suitable for coal seam dip angles of less than 15° and is often used in longwall mining faces. However, my country has abundant coal seam resources and diverse coal seam occurrence conditions. At present, there are no effective support methods for mining steeply inclined thick coal seams, and conventional top coal caving hydraulic supports cannot adapt to shortwall roadway mining, provide effective support working space and meet the requirements of rapid advance efficiency.

[0039] Based on the above application scenarios, this application provides a hydraulic support for top coal caving in steeply inclined coal seams and a top coal caving mining device, which can effectively alleviate the problems of insufficient safety support space and poor reliability of equipment.

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can represent: A alone, A and B at the same time, and B alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0041] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0042] Figure 1 This is a schematic diagram of the structure of a hydraulic support for top coal caving in a steeply inclined coal seam, showing its movement direction. Figure 2 This is a schematic diagram of the layout of individual supports in a hydraulic support system for caving top coal in a steeply inclined coal seam. Figure 3 This is a schematic diagram of the top beam in a hydraulic support for caving top coal in a steeply inclined coal seam; the base connection relationship is shown for clarity. Figure 2 The top beam structure was omitted.

[0043] like Figures 1-3 As shown, this application embodiment provides a hydraulic support 100 for top coal caving in steeply inclined coal seams, including: a first single support group 110 and a second single support group 120;

[0044] The first single frame group 110 includes two first single frames 111 and a first pushing mechanism 112; the second single frame group 120 includes two second single frames 121 and a second pushing mechanism 122.

[0045] Each frame in the first frame group 110 and the second frame group 120 includes a base, a top beam, and a drive column; the drive column is mounted on the base and is connected to the top beam for transmission.

[0046] Two first frames 111 are arranged along a first direction, and the first end of the base of one first frame 111 is connected to the second end of the base of the other first frame 111 through a first pushing mechanism 112.

[0047] Two second single frames 121 are arranged in a first direction, and the first end of the base in one second single frame 121 is connected to the second end of the base in the other second single frame 121 through a second pushing mechanism 122; the first direction is the extension direction of the top beam in any single frame of the first single frame group 110 and the second single frame group 120.

[0048] In the first frame group 110 and the second frame group 120, each first frame 111 and a second frame 121 are arranged along a second direction, and the top beam in each first frame 111 and the top beam in each second frame 121 are connected by a connecting mechanism 300; the second direction is perpendicular to the first direction.

[0049] In one embodiment, such as Figure 3 As shown, the first direction is Figure 3 The middle X direction, the second direction is Figure 3 Center Y direction.

[0050] In one embodiment, the drive column is a hydraulic cylinder used to drive the top beam to rise and fall relative to the base. The first pushing mechanism 112 and the second pushing mechanism 122 are pushing jacks. The connecting frame mechanism 300 is rotatably connected to the top beam via a rotating shaft, and the connecting frame mechanism 300 is a connecting frame jack.

[0051] The aforementioned hydraulic support 100 for top coal caving in steeply inclined coal seams includes two single-frame groups: a first single-frame group 110 and a second single-frame group 120. The first single-frame group 110 includes two first single frames 111, and the second single-frame group 120 includes two second single frames 121. The two first single frames 111 are connected by a first pushing mechanism 112 for self-movement. The two second single frames 121 are connected by a second pushing mechanism 122 for self-movement. To prevent the two first single frames 111 and the two second single frames 121 from collapsing during movement, one first single frame 111 and one second single frame 121 are connected as a whole by a connecting mechanism 300.

[0052] Taking the stepping self-movement of the first single frame group 110 as an example, the two ends of the first pushing mechanism 112 are respectively connected to the bases 1111 of the two first single frames 111. The first pushing mechanism 112 is a pushing jack. One end of the pushing jack is hinged to the base 1111 of one first single frame 111, and the other end is hinged to the base 1111 of the other first single frame 111. When self-movement is required, the top beam 1112 of the first single frame 111 abuts against the roof of the tunnel under the action of the drive column 1113, thus fixing the first single frame 111 in the tunnel; then the push jack pushes the second single frame 111 forward; subsequently, the top beam 1112 of the second single frame 111 abuts against the roof of the tunnel under the action of the drive column 1113, thus fixing the second single frame 111 in the tunnel; finally, the top beam 1112 of the first single frame 111 descends and contacts the tunnel under the action of the drive column 1113, and the push jack pulls the first single frame 111 forward.

[0053] Based on the fact that both the first frame group 110 and the second frame group 120 can move independently by stepping, the top beam 1112 of each first frame 111 in the first frame group 110 and the top beam 1212 of each second frame 121 in the second frame group 120 are connected to each other by two connecting mechanisms 300. This does not affect the independent movement in the first direction, and also prevents the self-movement in the second direction during the independent movement, thereby improving the safety and reliability of the entire hydraulic support 100.

[0054] In some embodiments, such as Figure 1 As shown, the second single frame 121 includes a hinged beam 1214, a swing drive mechanism 1215, a tail beam 1216, and a tail beam drive mechanism 1217.

[0055] One end of the hinged beam 1214 is hinged to the top beam 1212, and the other end is hinged to the tail beam 1216; one end of the swing drive mechanism 1215 is hinged to the base 1211, and the other end is hinged to the hinged beam 1214, for driving the hinged beam 1214 to swing relative to the top beam 1212; one end of the tail beam drive mechanism 1217 is hinged to the hinged beam 1214, and the other end is hinged to the tail beam 1216, for driving the tail beam 1216 to swing relative to the hinged beam 1214.

[0056] In each of the second frames 121, the hinged beam 1214 is located on the side of the second frame 121 away from the first frame 111.

[0057] In one embodiment, the second frame 121 includes a base 1211, a top beam 1212, a drive column 1213, a hinged beam 1214, a swing drive mechanism 1215, a tail beam 1216, and a tail beam drive mechanism 1217. The drive column 1213 is mounted on the base 1211 and is connected to the top beam 1212 in a transmission manner. The swing drive mechanism 1215 is a swing jack used to drive the hinged beam 1214 to swing relative to the top beam 1212. The tail beam 1216 is hinged to the tail of the hinged beam 1214, and the tail beam 1216 is controlled by the tail beam drive mechanism 1217. The tail beam drive mechanism 1217 is a tail beam jack used to drive the tail beam 1216 to rotate relative to the hinged beam 1214.

[0058] In some embodiments, such as Figure 1 As shown, a plate 1218 and a plate drive mechanism 1219 are installed on the side of the tail beam 1216 away from the hinge beam 1214.

[0059] One end of the insert plate drive mechanism 1219 is connected to the tail beam 1216, and the other end is connected to the insert plate 1218 for transmission, and is used to drive the insert plate 1218 to slide relative to the tail beam 1216 along the extension direction of the tail beam 1216.

[0060] In one embodiment, such as Figure 1 As shown, a plate 1218 is arranged inside the tail beam 1216, and the plate 1218 is controlled by a plate drive mechanism 1219. The plate drive mechanism 1219 is a plate jack.

[0061] In some embodiments, along the first direction, both ends of the first single frame group 110 and both ends of the second single frame group 120 are connected to a shield structure.

[0062] The protective structure includes protective beams, baffles, and connecting rods;

[0063] In either the first single-frame group 110 or the second single-frame group 120, one end of the protective beam is hinged to the top beam, and the other end is rotatably connected to the base via a connecting rod; the baffle is connected to the end of the protective beam away from the top beam.

[0064] Figure 4 This is a schematic diagram of the structure of the first single-frame assembly in a hydraulic support system for caving top coal in a steeply inclined coal seam. In one embodiment, as shown... Figure 4 As shown, each of the first single frames 111 includes a base 1111, a top beam 1112, a drive column 1113, and a cover structure 1114. The cover structure 1114 includes a cover beam 11141, a baffle 11142, a first connecting rod 11143, and a second connecting rod 11144.

[0065] It is understandable that each frame in the first frame group 110 and the second frame group 120 includes a base, top beam, drive column, shield beam, baffle, first link, and second link, among other main structural components. Combined with... Figure 1 and Figure 2 Each frame includes two drive columns, which improves the safety and reliability of the support.

[0066] In some embodiments, each first frame 111 includes a front extension beam 1115 connected to a top beam 1112; the front extension beam 1115 in each first frame 111 is located on the side of the first frame 111 away from the second frame 121.

[0067] In one embodiment, such as Figure 1 As shown, each of the first single frames 111 includes a forward probing beam 1115 connected to the top beam 1112, and the forward probing beam 1115 is located on the side of the first single frame 111 away from the second single frame 121. The hydraulic support 100 for top coal caving in steeply inclined coal seams provided in this application embodiment is a lateral support. When used underground, the lateral support is fixed in the main roadway 200, and the tail beam 1216 of the lateral support is close to the side wall of the coal seam floor of the main roadway 200; the lateral support moves step by step along the extension direction of the main roadway 200.

[0068] In this embodiment, the entire top coal caving hydraulic support 100 is composed of four individual frames. The front and rear individual frames move by stepping with push jacks to recover the top coal, while the left and right individual frames are prevented from tipping over by connecting frame jacks. The support is equipped with hinged beams 1214, tail beams 1216, and insert plates 1218 on the side to recover the top coal.

[0069] Figure 5 A schematic diagram showing the operational status of a top-coal caving mining device for steeply inclined coal seams. Figure 6 This is a schematic diagram showing the layout of various components in a top-coal caving mining device for steeply inclined coal seams. (Example:) Figure 5 and Figure 6 As shown, this application embodiment also provides a top coal caving mining device for steeply inclined coal seams, including: a main roadway 200, an assembled roadway 300, and a hydraulic support 100 for top coal caving of steeply inclined coal seams as described in any of the first aspect embodiments.

[0070] The assembly tunnel 300 and the main tunnel 200 are sealed and connected for return air;

[0071] The hydraulic support 100 for caving top coal in steeply inclined coal seams is located inside the main roadway 200; and the main roadway 200 extends along the first direction.

[0072] In one embodiment, such as Figure 5 As shown, the assembled roadway 300 is a structural component that is manually assembled within the main roadway 200, located below the forward beam of the hydraulic support 100. Figure 6 Arrows are used to indicate wind direction, such as... Figure 6As shown, the main roadway 200 is used for air intake, and the assembly roadway 300 is used for air return, thus forming a complete ventilation system. The connection between the assembly roadway 300 and the main roadway 200 is achieved by sealing with adhesive injection or other methods.

[0073] In some embodiments, the assembled tunnel 300 includes a plurality of sequentially connected square barrel structural members, each square barrel structural member including a plurality of quick-assembly plates, the plurality of quick-assembly plates being spliced ​​together to form a ring structure.

[0074] In one embodiment, the assembled tunnel 300 is composed of several modular square barrel structural components assembled into an independent structure. Each square barrel structural component is assembled from four independent quick-release plates. The assembled tunnel 300 can be continuously increased as the working face extends. The advantages of this assembled tunnel 300 are quick and convenient installation, strong self-sealing, and good return air effect.

[0075] In some embodiments, such as Figure 5 As shown, the coal mining device also includes a scraper conveyor 400; the scraper conveyor 400 is located below the tail beam 1216 of the hydraulic support 100;

[0076] The conveying direction of the scraper conveyor 400 is the same as the extension direction of the main roadway 200.

[0077] In some embodiments, the coal mining apparatus further includes a pre-splitting mechanism 500; the pre-splitting mechanism 500 includes a drilling rig located between two second single frames 121 and above the scraper conveyor 400.

[0078] The hydraulic support 100 has a pre-installed connection device for installing a drilling rig on the coal face side, which facilitates installation and disassembly. The drilling rig can be installed and the operation carried out according to the needs of pre-splitting construction, thereby increasing the pre-splitting effect.

[0079] In some embodiments, the pre-splitting mechanism 500 further includes an air cannon and / or a high-pressure water gun.

[0080] In one embodiment, the pre-splitting method mainly involves drilling holes for pre-splitting, with air cannons and high-pressure water jets used as auxiliary measures when necessary.

[0081] When used underground, the hydraulic support is installed on the side close to the coal wall. The initial support force of the support is used to pre-crack the top coal. According to the required hardness of the coal seam, a large-diameter pre-crack hole is constructed by drilling rig. Air cannons and high-pressure water guns are used as auxiliary measures to improve the pre-crack effect.

[0082] After pre-splitting, the top coal is lowered and transported out by a scraper conveyor. The support moves in steps using jacks to allow for coal release and recovery at the next step. This hydraulic support enables coal release mining in inclined coal seams, improving the mineability of complex coal seams and increasing the overall resource recovery rate of the mining area. Simultaneously, the mining device effectively reduces the labor intensity of workers, offering advantages such as reliable structure, ease of operation, strong adaptability, low cost, and fewer personnel required, thus contributing to safe and efficient production at the coal mine face.

[0083] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A steeply inclined coal seam caving hydraulic support, characterized in that, The invention relates to a hydraulic support for steeply inclined coal seam caving, comprising: a first single-frame group and a second single-frame group; the first single-frame group comprises two first single frames and a first pushing mechanism, and the second single-frame group comprises two second single frames and a second pushing mechanism; each single frame in the first single-frame group and the second single-frame group comprises a base, a top beam and a driving column; the driving column is mounted on the base and in transmission connection with the top beam; the two first single frames are arranged in a first direction, and the first end of the base in one of the first single frames is in transmission connection with the second end of the base in the other first single frame through the first pushing mechanism; the two second single frames are arranged in the first direction, and the first end of the base in one of the second single frames is in transmission connection with the second end of the base in the other second single frame through the second pushing mechanism; the first direction is the extension direction of the top beam in any single frame in the first single-frame group and the second single-frame group; in the first single-frame group and the second single-frame group, each first single frame and a second single frame are arranged in a second direction, and the top beam in each first single frame and the top beam in a second single frame are in transmission connection through a connecting frame mechanism; the second direction is perpendicular to the first direction.

2. The hydraulic support according to claim 1, characterized in that the second single frame comprises a hinged beam, a swing driving mechanism, a tail beam and a tail beam driving mechanism; one end of the hinged beam is hinged to the top beam, and the other end is hinged to the tail beam; one end of the swing driving mechanism is hinged to the base, and the other end is hinged to the hinged beam, for driving the hinged beam to swing relative to the top beam; one end of the tail beam driving mechanism is hinged to the hinged beam, and the other end is hinged to the tail beam, for driving the tail beam to swing relative to the hinged beam; wherein the hinged beam in each second single frame is located on the side of the second single frame away from the first single frame.

3. The hydraulic support according to claim 2, characterized in that the side of the tail beam away from the hinged beam is provided with a plugboard and a plugboard driving mechanism; one end of the plugboard driving mechanism is connected to the tail beam, and the other end is in transmission connection with the plugboard, for driving the plugboard to slide relative to the tail beam along the extension direction of the tail beam.

4. The hydraulic support of claim 1, wherein, in the first direction, both ends of the first single-frame group and both ends of the second single-frame group are connected with a shielding structure; the shielding structure comprises a shielding beam, a baffle and a connecting rod; in any single frame in the first single-frame group and the second single-frame group, one end of the shielding beam is hinged to the top beam, and the other end is in rotary connection with the base through the connecting rod; the baffle is connected to the end of the shielding beam away from the top beam.

5. The hydraulic support of claim 1, wherein, each first single frame comprises a front probe beam connected to the top beam; the front probe beam in each first single frame is located on the side of the first single frame away from the second single frame.

6. A device for caving and extracting coal from steeply inclined coal seams, characterised in that, The invention relates to a steeply inclined coal seam caving hydraulic support, comprising: a main roadway, an assembly roadway and the steeply inclined coal seam caving hydraulic support according to any one of claims 1-5; the assembly roadway and the main roadway are in sealed communication for air return; the steeply inclined coal seam caving hydraulic support is located inside the main roadway; and the main roadway extends in the first direction.

7. The coal extraction device of claim 6, wherein, the assembly roadway comprises a plurality of square tub structure members connected in sequence, and each square tub structure member comprises a plurality of quick-assembly plates which are spliced to form an annular structure.

8. The coal extraction device of claim 6, wherein, The coal mining device further comprises a scraper conveyor; the scraper conveyor is located below the tail beam of the hydraulic support. The conveying direction of the scraper conveyor is the same as the extension direction of the main roadway.

9. The coal extraction device of claim 8, wherein, The coal mining device further comprises a pre-splitting mechanism; the pre-splitting mechanism comprises a drilling machine, the drilling machine is located between the two second single frames and above the scraper conveyor.

10. The coal extraction device of claim 9, wherein, The pre-splitting mechanism further comprises an air cannon and / or a high-pressure water gun.

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