Bottom-cleaning-free self-moving roof protection system for return airway of fully mechanized coal mining face of thin coal seam of coal mine

Abstract

The invention provides a bottom-cleaning-free self-moving roof protection system for a return airway of a fully mechanized coal mining face of a thin coal seam of a coal mine. The system comprises a conveyor tail supporting cushion frame part, a front roadway roof supporting part and a rear roadway supporting part, wherein the conveyor tail supporting cushion frame part comprises a bottom plate, at least two telescopic jacks, two guide plates, a supporting platform and a hydraulic system, the front roadway roof supporting part comprises a front hydraulic support, a front beam and a rear frame are arranged in front of and behind a top beam of the front hydraulic support respectively to cooperate with each other to support a roof, the front hydraulic support is connected with a front end of a bottom plate of a cushion frame by means of a first pushing jack and a first connector, a bottom cleaning mechanism is arranged at a front end of a base of the hydraulic support, the rear roadway supporting part comprises a shield type support, and a front portion of a base of the shield type support is connected with a rear end of the bottom plate of the cushion frame by means of a second pushing jack and a second connector. The system has the advantages of being large in height adjusting range, having self-moving capacity and obstacle removing capacity and being high in adaptability.

Description

technical field [0001] The invention relates to the field of coal mine equipment, in particular to a bottom cleaning-free self-moving roof protection system for a return airway of a fully mechanized mining face in a thin coal seam. Background technique [0002] At present, the cutting holes of domestic thin coal seam fully mechanized mining face are generally arranged according to the thickness of the coal seam, and the height of the two troughs is relatively high, and the floor of the trough is generally lower than the floor of the working face. The head and tail of the machine are suspended in the trough. In order to ensure the safety and reliability of the conveyor, a pad must be installed under the head and tail of the conveyor. [0003] Due to the fluctuation of the direction of the trough, the appearance of mine pressure, and the change of the mining height of the working face, the height of the steps between the working face and the two troughs is constantly changing,...

AI Technical Summary

Problems solved by technology

But the same, it also has the lifting cylinder placed under the equipment, resulting in a high minimum height, a small range of adjustable height, changes in the length of the working surface, or when the conveyor slides down on the working surface, the pads are easy to get out of step with the working surface and the trough. Interference and other issues

[0007]In addition, the tail of the transporter and the adjustable pad need to be supported on the top during the underground use, because there are motors, reducers, pads and other components placed on this part , there is a blind area in the top support

At present, single pillars are mostly used for underground support in this part, which has problems such as small supporting force, low efficiency, high labor intensity, and low safety.

[0008]Due to the heavy weight of the tail part of the transporter and the adjustable pad, it is often difficult to move underground during use. Generally, winches are used for traction, and there are complex operations, Low efficiency, poor security and other issues

[0009]When the floor of the roadway fluctuates or the bottom of the drum is serious, the winch may not be able to pull it. Generally, manual bottom cleaning is required, and cleaning is more difficult when encountering rocky roadways. Difficult, there are problems such as low efficiency and high labor intensity

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