A method for pulling and lifting in the goaf of a fully mechanized top coal caving face with a large dip angle

Abstract

The present invention discloses a method for pulling and lifting the old goaf car in a fully mechanized caving face with a large dip angle, which includes connecting the pulling and lifting equipment to the old goaf car; before pulling and lifting, cleaning the coal side of the old goaf car to the bottom, cleaning it below the coal plow of the scraper conveyor to reduce the resistance generated during pulling and lifting; first, the piston rod of the pulling jack extends and the chain is tightened, and secondly, the single prop extends with pressure; the commander uses the carrier wave to uniformly issue instructions, and the control points of each jack and the control points of the single prop supply liquid simultaneously to lift upward, and the old goaf car is pulled and moved by using the button for group pulling and moving the old goaf car of the electro-hydraulic control; the distance of one-time pulling and lifting is about 400 mm, and the above process is repeated until it is pulled and moved to the appropriate position. According to the method for pulling and lifting the old goaf car disclosed by the present invention, the chain of the rear scraper of the support and the pulling point of the old goaf car are on the same straight line, making it very easy to pull the old goaf car and being able to bring the car to the designated position at one time.

Description

Technical Field

[0001] The present invention relates to the technical field of old goaf car pulling technology, and specifically discloses an old goaf car pulling method for a fully mechanized caving face with a large dip angle. Background Art

[0002] Due to the influence of the working face dip angle in a fully mechanized caving face with a large dip angle, the front car and the support are rigidly connected. The amount of upward or downward movement is related to the difference in the drivage of the machine and air headings. However, the rear car and the support are softly connected, i.e., connected by a chain. Therefore, the rear car is prone to sliding down. After sliding down, the pulling point of the old goaf car and the jack for pulling the rear scraper conveyor of the support cannot form a straight pulling line, resulting in a large resistance. Every time the old goaf car is pulled, workers have to enter the old goaf to clean it, posing a great threat to safety. At the same time, after the old goaf car slides down, the chain for pulling the rear scraper conveyor is stuck on the support base, causing the support to tilt, which also brings difficulties to the adjustment of the support attitude. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an old goaf car pulling method for a fully mechanized caving face with a large dip angle to solve the problem that the jack and the single prop in the prior art cannot work together.

[0004] To achieve the above purpose, the present invention provides an old goaf car pulling method for a fully mechanized caving face with a large dip angle, which specifically includes the following steps:

[0005] Connect the lifting equipment to the old goaf car:

[0006] The connection method between the lifting equipment and the old goaf car is as follows: One lifting jack is arranged every 10 supports, with one end connected to the four-link of the support tail beam and the other end connected to the chute of the old goaf car; For 3.15-meter single props, two are rooted at the head of the old goaf car, and the force application direction is the same as the pulling direction of the lifting jack; The rooting points are arranged staggeredly with the lifting jack, and the force is applied to the chute of the old goaf car;

[0007] Preparation before lifting:

[0008] Before lifting, clean the coal side of the old goaf car to the bottom, below the coal plough of the chute, to reduce the resistance generated during lifting;

[0009] Coordinated lifting:

[0010] First, the piston rod of the lifting jack is extended and the chain is tightened. Secondly, the single prop is extended to apply pressure. The commander uses the carrier wave to send out instructions uniformly, and the control points of each jack and the control points of the single prop supply liquid simultaneously to lift upward, and the old goaf car is pulled by using the button for group pulling of the electro-hydraulic control;

[0011] Gradual advancement:

[0012] The distance of one-time lifting is about 400 mm, and the above process is repeated until it is pulled to the appropriate position.

[0013] Preferably, in the step of "connecting the lifting device to the old pond vehicle", the rooting point and the lifting jack are arranged staggeredly with a spacing of 5 frames.

[0014] Preferably, in the step of "coordinated lifting", the single props are extended under pressure by means of remote control.

[0015] Preferably, in the step of "coordinated lifting", the chain used is a round-link chain with a diameter of 34 mm.

[0016] The present invention has the following technical effects:

[0017] (1) The chain for pulling the rear conveyor and the pulling point of the old pond vehicle are on the same straight line, making it very easy to pull the old pond vehicle and being able to bring the vehicle to the designated position at one time.

[0018] (2) The chain for pulling the rear conveyor no longer binds the base of the next support, thereby greatly reducing the difficulty of adjusting the inclination of the support and also reducing the risk of the chain for pulling the rear conveyor being easily broken due to large stress.

[0019] (3) Greatly reduces the labor force, reduces the number of times of personnel entering the old pond for cleaning, and ensures safety.

[0020] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following description. Brief Description of the Drawings

[0021] Figure 1 It is a flowchart of an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the installation position in an embodiment of the present invention. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0024] In order to make the technical means, creative features, achieved objectives and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0025] As Figure 1 - Figure 2 shown, a method for pulling and lifting an old pond vehicle in a large dip fully-mechanized caving face according to the present invention specifically includes the following steps:

[0026] Connect the lifting equipment to the old roadway car:

[0027] The connection method between the lifting equipment and the old roadway car is as follows: One lifting jack is arranged every 10 supports. One end is connected to the four-link of the support tail beam, and the other end is connected to the chute of the old roadway car; For the 3.15-meter single props, two are rooted at the head of the old roadway car, and the force direction is the same as the pulling direction of the lifting jack; The rooting points are arranged staggeredly with the lifting jacks, and the force is on the chute of the old roadway car;

[0028] Preparations before lifting:

[0029] Before lifting, clean the coal side of the old roadway car to the bottom, below the coal plow of the chute, to reduce the resistance generated during lifting;

[0030] Coordinated lifting:

[0031] First, the piston rod of the lifting jack extends and the chain is tightened. Secondly, the single props extend and are under pressure; The commander uses the carrier wave to issue instructions uniformly, and the control points of each jack and the control points of the single props supply liquid simultaneously to lift upward, and use the button for group pulling of the old roadway car of the electro-hydraulic control to perform the action of pulling the old roadway car;

[0032] Gradual advancement:

[0033] The distance of one-time lifting is about 400 mm, and repeat the above process until it is pulled to the appropriate position.

[0034] Before the construction implementation, the preparation materials for the pulling equipment include:

[0035] (1) One support pushing jack for every 10 supports.

[0036] (2) One 3.15-meter single prop for every 10 supports.

[0037] (3) Several circular chain with a diameter of 34 mm, U-shaped connecting rings, shackles (10 tons), etc.

[0038] The above are only the embodiments of the present invention, and common knowledge such as the specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the present invention.

Claims

1. A method for pulling and lifting the goaf vehicle in a fully mechanized caving face with a large dip angle, characterized in that, The steps include: Connect the lifting equipment to the old goaf car: One lifting jack is arranged every 10 supports. One end is connected to the four-link of the support tail beam, and the other end is connected to the chute of the old goaf car; For the 3.15-meter single prop, two are rooted at the head of the old goaf car, and the force direction is the same as the pulling direction of the lifting jack; The rooting point is arranged staggeredly with the lifting jack, and the force is on the chute of the old goaf car. Preparation before lifting: Before lifting, clean the coal side of the old goaf car to the bottom, clean it below the coal plow of the chute to reduce the resistance generated during lifting. Coordinated lifting: First, the piston rod of the lifting jack extends and the chain is tightened. Second, the single prop extends and is pressurized; The commander uses the carrier wave to issue instructions uniformly, and the control points of each jack and the control points of the single prop supply liquid simultaneously to lift upward, and use the button for group pulling of the old goaf car by electro-hydraulic control to perform the action of pulling the old goaf car. Gradual advancement: The lifting distance each time is about 400 mm, and repeat the above process until it is pulled to the appropriate position.

2. The old goaf car pulling and lifting method for a fully mechanized caving face with a large dip angle according to claim 1, characterized in that In the step of "Connecting the lifting equipment to the old goaf car", the rooting point is arranged staggeredly with the lifting jack with an interval of 5 supports.

3. A method for pulling and lifting the goaf of a fully mechanized caving face with a large dip angle according to claim 1, characterized in that, In the step of "Coordinated lifting", the single prop extends and is pressurized by remote control.

4. A method for pulling and lifting the goaf vehicle in a fully-mechanized caving face with a large dip angle according to claim 1, characterized in that, In the step of "Coordinated lifting", the chain uses a round link chain with a diameter of 34 mm.

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