Large-dip-angle fully-mechanized top coal caving face telescopic waste rock blocking protection device
By installing a gangue gate and a gangue gate telescopic jack on the hydraulic support, the safety hazard of gangue sliding down the steep working face was solved, and safe production and efficient coal recovery were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TANGSHAN KAILUAN TIETUO HEAVY MACHINERY MFG
- Filing Date
- 2025-06-18
- Publication Date
- 2026-04-21
AI Technical Summary
In steeply inclined fully mechanized longwall top coal caving faces, gangue or large pieces of coal are prone to slipping, causing safety hazards, especially posing a serious threat to personnel during rear maintenance.
Design a telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face, including a base, a rock-blocking gate, and a telescopic jack for the rock-blocking gate, connected by a pin shaft. Utilizing the narrow space of the hydraulic support, the rock-blocking gate can be adjusted for protection, blocking falling coal blocks or gangue.
It effectively blocks falling coal or gangue, ensuring the safety of personnel and equipment at the rear, improving the working environment, and increasing safety and production efficiency.
Smart Images
Figure CN224149613U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of telescopic rock-blocking protection devices, specifically relating to a telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face. Background Technology
[0002] Hydraulic supports are key equipment in fully mechanized coal mining equipment. Their function is to effectively support and control the roof of the working face, ensure the safe working space for workers and equipment, and play an important role in coal mine safety production, increasing working face output, reducing labor intensity and improving labor efficiency.
[0003] Hydraulic supports consist of load-bearing structural components, hydraulic cylinders, a hydraulic control system, and other auxiliary devices. Traditional hydraulic supports primarily consist of welded structural components such as a top beam, shield beam, base, and front and rear connecting rods. The top beam directly contacts the roof, transmitting support force and providing roof protection; the base directly contacts the bottom plate, transmitting support force and supporting other components; the shield beam connects the top beam, base, and connecting rods, bearing the horizontal force of the support and the pressure of collapsing roof rocks.
[0004] The top coal caving hydraulic support is the core equipment used in fully mechanized coal mining faces to realize the "top coal caving mining" process. It controls components such as the top beam and columns through a hydraulic system to support the roof and work in coordination with the coal mining machine and conveyor. By controlling the coal release mechanism at the rear of the support, it induces the top coal seam to collapse in layers to the rear scraper conveyor, realizing the collapse and recovery of coal at the top of the coal seam. It has the following advantages: (1) High mining efficiency, a single mining height can cover the full thickness of the coal seam, reducing the number of cuts and improving the resource recovery rate; (2) Low mining cost, reducing the number of face maintenance times and reducing the need for manual intervention; (3) Strong adaptability: suitable for thick coal seams, especially performing well in geological conditions where the top coal is relatively soft.
[0005] When using hydraulic supports for top coal caving for coal discharge, it is crucial to monitor the top coal collapse status to prevent large pieces of gangue or coal from impacting the rear conveyor. This is especially important during steeply inclined coal face mining, when personnel enter the rear coal discharge space for maintenance. Due to the significant height difference between the upper and lower ends of the working face, a slippage of coal or gangue from the rear conveyor poses a serious safety hazard to maintenance personnel, potentially even endangering their lives. Summary of the Invention
[0006] The purpose of this utility model is to provide a telescopic rock-blocking protection device for steeply inclined fully mechanized top coal caving faces, which solves the problem that existing rockfalls can easily cause danger.
[0007] To achieve the above objectives, this utility model provides a telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face, comprising a base installed below a hydraulic support, a rock-blocking gate provided on the outer side of the base, a rock-blocking gate telescopic jack provided on the rock-blocking gate, a first pin shaft slidably connected inside the base, connecting seats fixedly installed on the outer sides of both the base and the rock-blocking gate, a second pin shaft slidably connected inside the connecting seat located on the outer side of the base, and a third pin shaft slidably connected inside the connecting seat located on the outer side of the rock-blocking gate.
[0008] The principle of this utility model is as follows: In use, the base is a box-shaped structure made of welded steel plates. The lower part is connected to the hydraulic support base through ear plates, and is connected to the hydraulic support base through a first pin, and to the telescopic jack of the rock-blocking gate through a second pin. The base is provided with a main guide groove and a secondary guide groove to cooperate with and limit the movement of the rock-blocking gate. This not only ensures the reliability of the telescopic movement of the rock-blocking gate, but also improves the overall rigidity and strength of the base. Thus, when in use, the angle of the rock-blocking gate can be adjusted by the telescopic jack of the rock-blocking gate, and the area can be protected by the rock-blocking gate.
[0009] The beneficial effects of this utility model are as follows: By adding a rock-blocking gate and a telescopic jack to the hydraulic support, and driving the telescopic switch structure through the telescopic jack, this utility model has a simple structure and compact size. Arranged at the rear of the top coal caving hydraulic support, it makes full use of the irregular and narrow space between adjacent hydraulic supports with a center distance of 1.5m, which conforms to the mine's usage habits. It does not interfere with the hydraulic support and the rear scraper conveyor, nor does it interfere with the normal production operation of the various components and mechanisms of the hydraulic support. It can also divide the steep working face into several partitions, effectively blocking the rolling coal blocks or rock, protecting the safety of personnel and equipment at the rear. It solves the safety problem of rock or large coal blocks jumping and rolling down the working face in steep working faces of longwall top coal caving in coal mines, ensuring the safety of personnel and equipment in steep working faces, improving the working environment of employees, and playing an important role in ensuring safe production and high efficiency.
[0010] Furthermore, the base is installed below the hydraulic support, and the base is a box-shaped structure made of welded steel plates.
[0011] Furthermore, a main directional groove is provided on the base, which can increase the stability of the rock-blocking gate during its unfolding.
[0012] Furthermore, a secondary guide groove is provided on the base, which can assist the main guide groove in limiting the position of the base.
[0013] Furthermore, the second pin is hinged to the outer shell of the telescopic jack of the rock-blocking gate, and the second pin can connect the telescopic jack of the rock-blocking gate to the connecting seat.
[0014] Furthermore, the third pin is hinged to the output end of the telescopic jack of the rock-blocking gate, and the third pin can connect the telescopic jack of the rock-blocking gate to the connecting seat.
[0015] Furthermore, the first pin is hinged to the hydraulic support, and the first pin is used for the connection between the base and the hydraulic support. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the installation of the telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face according to an embodiment of this utility model.
[0017] Figure 2 This is a schematic diagram of the structure of the telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face according to an embodiment of this utility model.
[0018] Figure 3 This invention relates to a telescopic rock-blocking protection device for steeply inclined fully mechanized top coal caving faces. Figure 2 A schematic diagram of the base;
[0019] Figure 4 This invention relates to a telescopic rock-blocking protection device for steeply inclined fully mechanized top coal caving faces. Figure 2 A schematic diagram of the waste rock barrier gate;
[0020] Figure 5 This invention relates to a telescopic rock-blocking protection device for steeply inclined fully mechanized top coal caving faces. Figure 2 A schematic diagram of the structure of the telescopic jack of the rock-blocking gate;
[0021] Figure 6 This is a schematic diagram of the hydraulic system of the telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face, as described in this utility model embodiment.
[0022] The reference numerals in the accompanying drawings include:
[0023] 1. Base; 2. Wastegate; 3. Wastegate telescopic jack; 4. Pin 1; 5. Pin 2; 6. Pin 3; 7. Main guide groove; 8. Secondary guide groove; 9. Connecting seat; 10. Hydraulic support. Detailed Implementation
[0024] The following detailed description illustrates the specific implementation method:
[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, this embodiment provides a telescopic rock-blocking protection device for a steeply inclined fully mechanized top coal caving face, including a base 1 installed below a hydraulic support 10, a rock-blocking gate 2 provided on the outer side of the base 1, a rock-blocking gate telescopic jack 3 provided on the rock-blocking gate 2, a pin 4 slidably connected inside the base 1, and connecting seats 9 fixedly installed on the outer sides of both the base 1 and the rock-blocking gate 2. A second pin 5 slidably connected inside the connecting seat 9 located on the outer side of the base 1, and a third pin 6 slidably connected inside the connecting seat 9 located on the outer side of the rock-blocking gate 2.
[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the base 1 is installed below the hydraulic support 10. The base 1 is a box-shaped structure made of steel plates welded together. The base 1 is provided with a main guide groove 7, which can increase the stability of the rock-blocking gate 2 when it is opened. The base 1 is provided with a secondary guide groove 8, which can assist the main guide groove 7 in limiting the base 1.
[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, pin 2 5 is hinged to the outer shell of the telescopic jack 3 of the rockfall barrier, and pin 2 5 can connect the telescopic jack 3 of the rockfall barrier to the connecting seat 9. Pin 3 6 is hinged to the output end of the telescopic jack 3 of the rockfall barrier, and pin 3 6 can connect the telescopic jack 3 of the rockfall barrier to the connecting seat 9. Pin 1 4 is hinged to the hydraulic support 10, and pin 1 4 is used for the connection between the base 1 and the hydraulic support 10.
[0028] The specific implementation process of this utility model is as follows: In use, the base 1 is a box-shaped structure formed by welding steel plates. The lower part is connected to the base of the hydraulic support 10 through the ear plate, and is connected to the base of the hydraulic support 10 through the first pin 4. It is connected to the telescopic jack 3 of the blocking gate through the second pin 5. The base 1 is provided with a main guide groove 7 and a secondary guide groove 8 to cooperate with and limit the movement of the blocking gate 2. This not only ensures the reliability of the telescopic movement of the blocking gate 2, but also improves the overall rigidity and strength of the base 1. Thus, when in use, the angle of use of the blocking gate 2 can be adjusted by the telescopic jack 3 of the blocking gate, and the area can be protected by the blocking gate 2.
[0029] This utility model adds a rockfall barrier 2 and a telescopic rockfall barrier jack 3 to the hydraulic support 10. The telescopic rockfall barrier jack 3 drives a telescopic switch structure. The structure is simple and compact, and is arranged at the rear of the top coal caving hydraulic support 10. It makes full use of the irregular and narrow space between adjacent hydraulic supports 10 with a center distance of 1.5m, which is in line with the mine's usage habits. It does not interfere with the hydraulic support 10 and the rear scraper conveyor, nor does it interfere with the normal production operation of the various components and mechanisms of the hydraulic support 10. It can also divide the steep angle working face into several partitions, effectively blocking the rolling coal blocks or rockfalls, protecting the safety of personnel and equipment at the rear. It solves the safety problem of rockfalls or large coal blocks jumping and rolling down the working face in steep angle working faces of longwall top coal caving in coal mines, which can easily cause injuries. It ensures the safety of personnel and equipment in steep angle working faces, improves the working environment of employees, and plays an important role in ensuring safe production and high efficiency.
[0030] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A telescopic gangue blocking protection device for a large-inclination fully-mechanized top coal caving face, comprising a base installed below a hydraulic support, characterized in that: A rock-blocking gate is provided on the outer side of the base, and a rock-blocking gate telescopic jack is provided on the rock-blocking gate. A first pin is slidably connected inside the base. Connecting seats are fixedly installed on the outer sides of both the base and the rock-blocking gate. A second pin is slidably connected inside the connecting seat located on the outer side of the base, and a third pin is slidably connected inside the connecting seat located on the outer side of the rock-blocking gate.
2. The telescopic coal-blocking protection device for a large-inclination fully mechanized top coal caving face according to claim 1, characterized in that: The base is installed below the hydraulic support.
3. The telescopic coal blocking protection device for large-inclination fully mechanized top coal caving face according to claim 1, characterized in that: The base is provided with a main directional groove.
4. The telescopic coal-blocking protection device for large-inclination fully mechanized top coal caving face according to claim 1, characterized in that: The base is provided with a secondary guide groove.
5. The telescopic coal-blocking protection device for large-inclination fully mechanized top coal caving face according to claim 1, characterized in that: The second pin is hinged to the outer shell of the telescopic jack of the rock-blocking gate.
6. The telescopic coal-blocking protection device for large-inclination fully mechanized top coal caving face according to claim 1, characterized in that: The third pin is hinged to the output end of the telescopic jack of the rock-blocking gate.
7. The telescopic rock-blocking protection device for steeply inclined fully mechanized top coal caving faces according to claim 1, characterized in that: The first pin is hinged to the hydraulic support.