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Working Face Support of Double Drum Shearer
Release time:
2022-12-26
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Working Face Support of Double Drum Shearer
Fully mechanized mining face with hydraulic supportSupport the top plate and maintain the working space. Hydraulic supportUsing high-pressure liquid as the power to complete the working faceRoof support, roof cutting, protection, gangue,Bracket moving forward and moving face conveyorWait for action. The supporting methods of hydraulic support are andTime support, lag support and advance supportway.
(1) Timely support. After the shearer cuts coal, the support is moved first and the conveyor is moved later, which is suitable for the roof of the coal seam.Poor stability of the working face.
(2) Lag support. After the shearer cuts coal, move the conveyor first, move the bracket later, and the moving frame should lag behind in cutting coal.Larger distance, the exposed area of the roof is large, suitable for the stable working face of the roof.
(3) Advance support. When the coal wall is serious, the front column of the bracket is used before the shearer cuts the coal.The surplus between the conveyors moves forward, so that the roof behind the coal wall is supported in advance.
The moving methods of hydraulic support include single frame sequential moving and interval staggered moving.
(1) Single rack is moved in sequence. The bracket moves forward in sequence along the coal cutting direction of the shearer, and the moving step distanceEqual to the cutting depth, the bracket should be moved into a straight line. This method is simple to operate, easy to ensure the quality of specifications, suitable for no.Stable roof, widely used.
(2) Staggering at intervals. Move one at a time, and move the shearer after cutting a certain distance.Bracket. This method is suitable for the condition of stable roof and fast traction speed of shearer.The end support of fully mechanized working face is an important part of working face support. At present, China's coal mining workFace end support mainly includes end hydraulic support support, common hydraulic support and single hydraulic support and support.Beam support and other methods. Specific can be selected according to the actual situation of the face end.
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