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METHOD FOR ADJUSTING AN AUTOMATIC LEVEL CONTROL OF THE PLANE IN PLANING OPERATIONS IN HARD COAL MINING
METHOD FOR ADJUSTING AN AUTOMATIC LEVEL CONTROL OF THE PLANE IN PLANING OPERATIONS IN HARD COAL MINING
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机译:硬煤开采规划作业中调整平面自动控制的方法
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摘要
A method of setting an automatic level control of a plow in longwall mining operations. By means of a boom control mechanism, a control angle for setting motion of the plow, which is guided on a face conveyor, in an exploitation direction as a climbing, plunging or neutral motion is set. For each plow stroke, a cutting depth and the control angle, derived as a differential angle between inclinations of the face conveyor and of a top canopy of a shield support frame are determined. In a calculating unit, a face height change per plow stroke is calculated therefrom and a face height, as a projected height, is associated with each face position of the face conveyor. When a shield support frame that trails behind the plow in terms of a time delay reaches a respective face position, an actual height of the face is calculated and compared with the store projected height. For subsequent plow strokes, a height differential value between the projected and actual heights, determined for a respective face position, in the sense of a self-learning effect of the calculating unit when the control angle that is to be set to achieve a projected height of the face is prescribed, is taken into consideration.
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