Method for adjusting an automatic level control of the plane in planing operations in hard coal mining

Abstract

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.

Description

technical field [0001] The invention relates to a method for adjusting the automatic level control of a planer (Hobel) in a face operation (Strebbetrieb) in an underground coal mine, which is equipped with a hydraulic protective support (Schildausbau) and equipped with a planer Face conveyor for guiding the planer at the guide, the planer guide being formed on the planer, wherein the position of the face conveyor with the planer guided thereon in the mining direction can be controlled by a cantilever control supported on the protective support change, and the control angle for adjusting the movement of the planer in the extraction direction to a climbing movement, a diving movement or a neutral movement can be adjusted by means of the boom control. Background technique [0002] The problem of automatic horizontal control of the planer operation not only in the extraction direction of the planer but also in the recovery direction (Verhiebrichtung) is also that on the one hand...

AI Technical Summary

Problems solved by technology

In addition, this method is also accompanied by insecurity in its reporting or is also limited by a corresponding delay in time when an adjustment may be required, because only after a few planer strokes, that is, several times, usually about A more reliable report on the material cut by the planer is only produced after 5 passes through the guard bracket

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