Gril capable of putting top coal

Abstract

The present invention discloses a gangue-stopping equipment capable of blasting down the roof. It includes upper gangue-stopping device, gangue-stopping tank body, pin, constrained component, top beam and lower gangue-stopping device connected together with rear post of supporting frame. Besides, said invention also provides the working principle of said gangue-stopping equipment and its concrete operation method.

Description

technical field [0001] The invention relates to a sliding roof beam hydraulic support used for coal mining working faces in coal mines and a top-coal retaining device for light hydraulic supports with a weight of less than 8 tons. Background technique [0002] Hydraulic support is divided into two categories: fully mechanized mining support and sliding roof beam hydraulic support. The background technology of the present invention is the technology described in the "General Technical Specifications for Sliding Roof Beam Hydraulic Support" of China's coal industry. In addition, it also includes top-coal caving supports with a weight of less than 8 tons. Existing technologies in the field of sliding top beam hydraulic supports include suspended sliding top beam hydraulic supports (Chinese patent application No. 88104291.9); side-by-side sliding top beam hydraulic supports (Chinese patent application No. 91200747.8) and the like. There are two kinds of top-coal caving methods...

AI Technical Summary

Problems solved by technology

The tail beams of these supports are relatively narrow, and the gaps between the tail beams are relatively large, and gangue and coal are easy to leak through the gaps, so roof nets must also be laid when caving top coal, which increases the cost per ton of coal

In addition, this kind of tail beam is inclined backward and downward from the tail of the top beam, and its lower end is supported by the bottom plate, so that the entire tail beam is exposed outside the top beam. When a large stone falls from the top plate, it will bend the tail beam

In addition, the structure of these tail beams belongs to the two-point support. Since they are all bent upwards except for the straight tail beam, the center of gravity of the tail beam is higher than the two support points, so it is unstable. There is a large gangue, When the coal falls between the two tail beams, it will tilt the tail beams outwards, causing the tail beams to overturn and cause danger

In the fully mechanized mining support, the tail beam is called the cover beam, which is connected with the top beam as a whole. It has high strength and is not afraid of being hit by large stones, but it is heavy and weighs about ten tons each. It is not suitable for light supports.

There are also some brackets with a weight of less than 8 tons that use an integral wide tail beam. The lower end is a line that contacts the bottom plate or is supported by a hydraulic cylinder, which is not easy to fall over. A narrow tail beam will be bent by a large rock

[0003] In addition, the applicant once designed a gangue-retaining hydraulic support, in which the upper gangue board welded with steel plates is vertically downward from the rear end of the top beam, and is not exposed outside the top beam, so the gangue cannot hit it , so it has been popularized and applied, but in order to resist the uneven horizontal thrust from the goaf and prevent the upper gangue plate from rotating left and right with the vertical line as the axis, the upper gangue board needs to pass through two hinge points and the top beam tail and the distance between the two hinge points should be as far as possible. However, when encountering an uneven roof, the top beam will be inclined to the left high and the right low or the right high and the left low. At this time, it is hinged with the top beam. The upper gangue board is also inclined along with the top beam. Since the upper gangue board sags longer, it will deviate from the side of the top beam for a certain distance, so that two adjacent gangue boards interfere with each other and are even crushed. The problem

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