Intelligent coal drawing method based on real-time monitoring of top coal thickness variation

Abstract

The invention, which belongs to the technical field of automatic mining of the fully mechanized caving face, discloses an intelligent coal drawing method based on real-time monitoring of the top coalthickness variation. Top coal thickness information is monitored in real time by using an ultra-wideband radar and a laser three-dimensional scanning technology; and the opening or closing of the coaldrawing hole is adjusted automatically according to the top coal thickness variation. The method comprises the following steps: step one, calculating a top coal thickness variation by an ultra-wideband radar transmitting device based on a radar echo signal; step two, calculating a coal drawing amount by a laser three-dimensional scanning device according to scanned geometrical characteristics ofthe coal flow, the coal flow speed, and coal drawing time of the coal drawing hole; step three, establishing a functional equation between the top coal thickness variation and the coal drawing time and calculating optimal opening / closing time of the coal drawing hole at different coal drawing stages; and step four, sending out opening and closing instructions to the coal drawing hole by a coal drawing top-coal controller to realize intelligent coal drawing of the fully mechanized caving face. The method has the following advantages: the whole coal drawing process is controlled accurately; theadaptability is high and the manual intervention is avoided; the coal drawing efficiency is improved effectively; and the labor intensity is reduced.

Description

Technical field [0001] The invention relates to a coal caving method for a fully mechanized caving face, in particular to an intelligent coal caving method based on real-time monitoring of top coal thickness variation, and belongs to the technical field of fully mechanized caving automatic mining. Background technique [0002] Coal is the main energy source in our country, and the realization of intelligent fully mechanized mining of thick coal seams will become an important development trend. [0003] In the process of fully mechanized caving mining, one of the urgent problems to be solved is how to correctly judge the best opening and closing time of coal caving openings, which is a technical problem that needs to be solved urgently to be matched with intelligent fully mechanized caving mining. At present, there are two main methods for the opening and closing time of the coal caving port. One is that the coal caving worker determines the opening and closing time of the coal cavi...

AI Technical Summary

Problems solved by technology

Therefore, there is a big defect in setting a unified coal discharge program in advance according to all the supports on the working face to complete the opening and closing of the coal discharge port. Since the thickness of the top coal changes at any time, the opening and closing time of the coal discharge port will also change accordingly. If the closing time remains unchanged, it will inevitably lead to over-discharging or under-discharging during the coal discharge process, resulting in a decline in coal quality or loss of resources.

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