Supporting U-shaped combined support for withdrawing triangular area of comprehensive mining working face

Abstract

The utility model relates to the technical field of underground coal mine supporting equipment, in particular to a U-shaped combined support for supporting a withdrawing triangular area of a comprehensive mining working face, which is suitable for efficient and safe supporting under complex geological conditions. The supporting U-shaped combined support comprises a support A and a support B. A support A top beam of the support A is of a U-shaped plate-shaped structure, and a support B top beam of the support B corresponds to and is matched with a U-shaped opening of the support A top beam. A bracket A base of the bracket A and a bracket A base cross beam are combined into a U-shaped structure; a bracket B base of the bracket B corresponds to and is matched with a U-shaped opening of the bracket A base; the support A base and the support B base are in transmission connection through a telescopic stepping cylinder, and the support A base is provided with a support A base bottom lifting cylinder which makes contact with the ground downwards to improve stability. By means of the modular combination design (the supports A and B) and bottom lifting-side pushing cooperative control, the supporting efficiency and safety are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of underground support equipment in coal mines, specifically a U-shaped combined support for the retreat triangle area of ​​a fully mechanized mining face, which is suitable for efficient and safe support under complex geological conditions. Background Technology

[0002] The removal of equipment and supports in fully mechanized mining faces is one of the important processes in coal mining and working face production. During the support removal process, in order to avoid difficulties in the removal of supports and to create a working area for personnel, it is necessary to create a "triangle zone". This zone is used for support and protection in the area adjacent to the support removal and where the roof has not collapsed, thereby reducing the pressure on the roof. This facilitates the removal of supports and allows for the maintenance and management of the roof.

[0003] Chinese utility model patent (publication number CN212105908U) proposes a hydraulic support system for the triangular area of ​​a retractable working face, comprising multiple support assemblies arranged in sequence. Each support assembly includes two rows of support groups arranged in a crisscross pattern. Each row of support groups includes two supports and a pushing cylinder, with adjacent supports connected by the pushing cylinder. Each support includes a base, a support cylinder, and a top beam. The support cylinder is vertically installed between the base and the top beam. The bases of one row of support groups are spaced apart from the bases of the other row, and the top beams of one row of support groups are arranged in a crisscross pattern with the top beams of the other row. The top surface of the top beam forms the support surface. Its drawback is that while a double-row crisscross support group is used, the staggered design of the top beams results in a large space occupation and prevents modular rapid expansion.

[0004] During the retreat of the fully mechanized mining face, the roof pressure in the triangular area is concentrated and prone to collapse. Existing supports mostly use single props or fixed supports, which have the following problems: ① poor structural stability, unable to adapt to dynamic changes in roof pressure; ② low installation efficiency, making it difficult to quickly adjust support parameters; ③ lack of active control over base slippage and roof beam offset; ④ complex disassembly and assembly procedures, making it difficult to match rapid retreat conditions. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the purpose of this utility model is to provide a U-shaped combined support for the retraction triangle area of ​​the comprehensive mining face. By combining the modularly designed support A and support B, the problems of poor stability and low adjustment efficiency of traditional support are solved.

[0006] The technical solution of this utility model is:

[0007] A U-shaped combined support for the retraction triangle area of ​​a mechanized mining face is disclosed. The U-shaped combined support includes support A and support B, wherein: the top beam of support A is a U-shaped plate structure, and the top beam of support B corresponds to and matches the U-shaped opening of the top beam of support A; the base of support A and the crossbeam of the base of support A are combined to form a U-shaped structure, and the base of support B corresponds to and matches the U-shaped opening of the base of support A; the base of support A and the base of support B are connected by a telescopic stepping cylinder, and the base of support A is provided with a base lifting cylinder that contacts the ground downward to increase stability.

[0008] The aforementioned U-shaped combined bracket is used to support the triangular area of ​​the recovery working face. The stepping cylinder is horizontally installed between the stepping cylinder head pin of bracket A and the stepping cylinder tail pin of bracket B.

[0009] The aforementioned U-shaped combined support for the triangular area of ​​the fully mechanized mining face retraction includes a support A base, a support A base beam, a support A column, a support A column cylinder, a support A top beam, and a support A base lifting cylinder. The specific structure is as follows: two relatively flat support A bases are connected at one end by the support A base beam to form a U-shaped structure. A support A column is vertically mounted on the support A base, and the support A column is connected to the bottom of the support A top beam above it by a retractable support A column cylinder. Two support A base lifting cylinders are vertically installed on the support A base beam, with the lower end of each cylinder corresponding to the ground.

[0010] The U-shaped combined bracket for supporting the retraction triangle area of ​​the comprehensive mining working face has two stepping cylinder head pins on the inner side of the crossbeam of the base A of the bracket, and one end of the stepping cylinder is connected to the stepping cylinder head pin.

[0011] The U-shaped combined support bracket for the retraction triangle area of ​​the comprehensive mining face is provided with a support A top beam side guard plate installed on the side of the support A top beam and a support A base side guard plate installed on the side of the support A base.

[0012] The aforementioned U-shaped combined support for the retreat triangle area of ​​the mining face has a top beam consisting of two symmetrically arranged half-U-shaped plate structures on the left and right sides to form a U-shaped plate structure.

[0013] The aforementioned U-shaped combined support for the retraction triangle area of ​​the mining face includes a support B base, a support B top beam, a support B column cylinder, a support B column, and a support B base crossbeam. The specific structure is as follows: two relatively flat support B bases are connected at one end by the support B base crossbeam. A support B column is vertically installed on the support B base, and the support B column is connected to the bottom of the support B top beam above it by a retractable support B column cylinder.

[0014] The aforementioned U-shaped combined bracket for supporting the triangular area of ​​the mining face retraction has a side guard plate installed on the side of the bracket B base and a rear guard plate installed at the rear of the bracket B base.

[0015] The U-shaped combined bracket for supporting the triangular area of ​​the comprehensive mining working face has two stepping cylinder tail pins on the inner side of the crossbeam of the base B of the bracket, and the other end of the stepping cylinder is connected to the stepping cylinder tail pin.

[0016] The advantages and beneficial effects of this utility model are:

[0017] 1. Improved stability: The dual-bracket U-shaped layout disperses the pressure on the top plate, and the base side push and the bottom lifting cylinder work together to prevent slippage.

[0018] 2. Dynamic adjustment: The hydraulic system adjusts the height of the top beam and the lateral pushing distance in real time to adapt to the sinking of the top plate.

[0019] 3. Complementary U-shaped interlocking structure: The top beam of bracket A and the top beam of bracket B form a nested U-shaped interface, and the base of bracket A and the base of bracket B form a complementary U-shaped base.

[0020] 4. Graded stabilization system: The base lifting cylinder of bracket A, the column cylinder of bracket A, and the column cylinder of bracket B form a three-level hydraulic support system.

[0021] 5. This utility model significantly improves support efficiency and safety through modular combination design (support A+B) and bottom lifting-side pushing coordinated control. Attached Figure Description

[0022] Figures 1-3 This is a schematic diagram of the support structure A of the U-shaped combined support bracket of this utility model. Wherein, Figure 1 Main view, Figure 2 This is a top view. Figure 3 This is the left view.

[0023] Figures 4-6 This is a schematic diagram of the support structure B of the U-shaped combined support bracket of this utility model. Wherein, Figure 4 Main view, Figure 5 This is a top view. Figure 6 This is the left view.

[0024] Figures 7-10 This is a schematic diagram of the structure of the U-shaped combined support bracket of this utility model; wherein, Figure 7 Main view, Figure 8 This is a top view. Figure 9 Left view Figure 10 It is a 3D image.

[0025] In the diagram, 1 is bracket A, 11 is bracket A base, 12 is bracket A base crossbeam, 13 is bracket A column, 14 is bracket A column cylinder, 15 is bracket A top beam, 16 is bracket A base lifting cylinder, 17 is stepping cylinder head pin, 18 is bracket A top beam side guard plate, 19 is bracket A base side guard plate; 2 is bracket B, 21 is bracket B base, 22 is bracket B base rear guard plate, 23 is bracket B base side guard plate, 24 is bracket B top beam, 25 is bracket B column cylinder, 26 is bracket B column, 27 is stepping cylinder tail pin, 28 is bracket B base crossbeam; 3 is stepping cylinder. Detailed Implementation

[0026] like Figures 1-10 As shown, this utility model proposes a U-shaped combined support for the retraction triangle area of ​​a comprehensive mining working face, including support A1 and support B2, wherein: the support A top beam 15 of support A1 is a U-shaped plate structure, and the support B top beam 24 of support B2 corresponds to and matches the U-shaped opening of the support A top beam 15; the support A base 11 and the support A base crossbeam 12 of support A1 are combined to form a U-shaped structure, and the support B base 21 of support B2 corresponds to and matches the U-shaped opening of the support A base 11; the support A base 11 and the support B base 21 are connected by a retractable stepping cylinder 3, which is horizontally installed between the stepping cylinder head pin 17 of support A1 and the stepping cylinder tail pin 27 of support B2; the support A base 11 is provided with a support A base lifting cylinder 16 that contacts the ground downward to increase stability.

[0027] like Figures 1-3 As shown, bracket A1 mainly includes bracket A base 11, bracket A base crossbeam 12, bracket A column 13, bracket A column cylinder 14, bracket A top beam 15, bracket A base lifting cylinder 16, stepping cylinder head pin 17, bracket A top beam side guard plate 18, and bracket A base side guard plate 19. The specific structure is as follows:

[0028] Two relatively flat support bases 11 are connected at one end by a support base beam 12 to form a U-shaped structure. A support column 13 is vertically mounted on the support base 11. The support column 13 is connected to the bottom of the support top beam 15 above it by a retractable support column cylinder 14. The support column cylinder 14 drives the support top beam 15 to rise and fall for support. Two support base lifting cylinders 16 are vertically installed on the support base beam 12, with their lower ends corresponding to the ground to support the ground and maintain stability. Support top beam side guard plates 18 are installed on the sides of the support top beam 15, and support base side guard plates 19 are installed on the sides of the support base 11.

[0029] The support beam A 15 can be symmetrically arranged as two half-U-shaped plate structures to form a U-shaped plate structure. Depending on the support work requirements, the two parts of the support beam A 15 can be raised and lowered synchronously or asynchronously to meet different support requirements. Furthermore, when the U-shaped support beam A 15 is a segmented structure, its smaller area facilitates lowering it into the well.

[0030] like Figures 4-6 As shown, bracket B2 mainly includes bracket B base 21, bracket B base rear guard plate 22, bracket B base side guard plate 23, bracket B top beam 24, bracket B column cylinder 25, bracket B column 26, stepper cylinder tail pin 27, and bracket B base crossbeam 28. The specific structure is as follows:

[0031] Two relatively flat support bases 21 are connected at one end by a support base crossbeam 28. A support column 26 is vertically mounted on each support base 21. The support column 26 is connected to the bottom of the support top beam 24 above it by a retractable support column cylinder 25. The support column cylinder 25 drives the support top beam 24 to rise and fall for support. Side guard plates 23 are installed on the sides of the support bases 21, and a rear guard plate 22 is installed at the rear of the support bases 21.

[0032] Two stepper cylinder head pins 17 are provided on the inner side of the crossbeam 12 of the base of bracket A, and one end of the stepper cylinder 3 is connected to the stepper cylinder head pin 17. Two stepper cylinder tail pins 27 are provided on the inner side of the crossbeam 28 of the base of bracket B, and the other end of the stepper cylinder 3 is connected to the stepper cylinder tail pins 27. Under the action of the stepper cylinder 3, the closer or farther distance between bracket A1 and bracket B2 is realized. The stepper cylinder 3 can achieve millimeter-level or higher precision position adjustment through the precise positioning function of stepper motor or pneumatic piston combination, avoiding step loss error.

[0033] like Figures 7-10 As shown, the working process of this utility model is as follows: The base lifting cylinder 16 of bracket A supports and fixes bracket A1 to the ground. The stepping cylinder 3 drives bracket B2 to approach bracket A1, and the lifting and adjusting cylinders 14 and 25 of bracket A and bracket B are adjusted so that the top beam 24 of bracket B enters the U-shaped opening of the top beam 15 of bracket A and remains flush, forming a support plane for support work. After the support work is completed, the stepping cylinder 3 drives bracket B2 away from bracket A1.

[0034] The implementation results show that this utility model has a simple structure, light weight, and convenient operation. It can determine the reasonable working resistance of the support group, effectively support the top plate of the triangular area, improve the lateral bearing capacity of the support group, resist the lateral force from the old pond direction, improve the support stability by more than 40%, shorten the triangular area retraction operation time to 1 / 3 of the traditional process, and achieve a support surface flatness error of ≤3mm / m. 2The maintenance space meets the requirements of the dismantling process. In addition, remote control functionality can be added to brackets A and B as needed.

Claims

1. A U-shaped combined support for the retraction triangular area of ​​a comprehensive mining working face, characterized in that, The U-shaped combined support includes support A and support B, wherein: the top beam of support A is a U-shaped plate structure, and the top beam of support B corresponds to and matches the U-shaped opening of the top beam of support A; the base of support A and the crossbeam of the base of support A combine to form a U-shaped structure, and the base of support B corresponds to and matches the U-shaped opening of the base of support A; the base of support A and the base of support B are connected by a telescopic stepping cylinder, and the base of support A is equipped with a base lifting cylinder that contacts the ground downwards to increase stability.

2. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 1, characterized in that, The stepper cylinder is horizontally mounted between the stepper cylinder head pin of bracket A and the stepper cylinder tail pin of bracket B.

3. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 1, characterized in that, Support A includes a support A base, a support A base beam, a support A column, a support A column cylinder, a support A top beam, and a support A base lifting cylinder. The specific structure is as follows: Two relatively flat support A bases are connected at one end by the support A base beam to form a U-shaped structure. A support A column is vertically mounted on the support A base, and the support A column is connected to the bottom of the support A top beam above it by a retractable support A column cylinder. Two support A base lifting cylinders are vertically installed on the support A base beam, with the lower end of each cylinder corresponding to the ground.

4. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 1, characterized in that, Two stepping cylinder head pins are provided on the inner side of the crossbeam of bracket A base, and one end of the stepping cylinder is connected to the stepping cylinder head pin.

5. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 1, characterized in that, Install the support beam side guard plate on the side of the support A top beam, and install the support base side guard plate on the side of the support A base.

6. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 1, characterized in that, The top beam of support A consists of two symmetrically arranged semi-U-shaped plate structures on the left and right sides, forming a U-shaped plate structure.

7. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 1, 3, or 4, characterized in that, The bracket B includes a bracket B base, a bracket B top beam, a bracket B column cylinder, a bracket B column, and a bracket B base crossbeam. The specific structure is as follows: two relatively flat bracket B bases are connected at one end by a bracket B base crossbeam. A bracket B column is vertically installed on the bracket B base. The bracket B column is connected to the bottom of the bracket B top beam above it by a retractable bracket B column cylinder.

8. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 7, characterized in that, Install the side guard plate of bracket B on the side of bracket B base, and install the rear guard plate of bracket B base at the rear of bracket B base.

9. The U-shaped combined support for the retraction triangular area of ​​the fully mechanized mining face as described in claim 7, characterized in that, Two stepping cylinder tail pins are provided on the inner side of the crossbeam of the base of bracket B, and the other end of the stepping cylinder is connected to the stepping cylinder tail pin.

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