An intelligent coal discharge method based on real-time monitoring of top-coal thickness variation

Abstract

A smart coal caving method based on real time monitoring of variation in top coal thickness, using ultrawide-band radar and laser 3D scanning technology to monitor top coal thickness information in real time and automatically regulate the opening and closing of a coal caving opening, and comprising the following steps: (I) an ultrawide-band radar apparatus (4) calculates a variation in top coal thickness on the basis of a radar echo signal; (II) a laser 3D scanning apparatus (6) calculates a coal caving amount on the basis of a scanned coal flow geometric feature, coal flow speed, and coal caving time at the coal caving opening; (III) a function equation between the top coal thickness variation and the coal caving time is established, and optimal open and close times of the coal caving opening for different coal caving stages are calculated; and (IV) open and close instructions are sent to the coal caving opening by means of a top coal caving controller, thus achieving smart coal caving in a fully-mechanized caving workface. The present method allows for accurate control and strong adaptability in the entire coal caving process, without the need for manual interference, effectively raising coal caving efficiency, and reducing labor intensity.

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 caving mining in thick coal seams will become an important development trend. [0003] In the process of fully mechanized caving mining, one of the problems to be solved urgently is how to correctly judge the optimal opening and closing time of the coal outlet, which is an urgent technical problem matching with intelligent fully mechanized caving mining. At present, there are mainly two methods for the opening and closing time of the coal discharge port. One is to determine the opening and closing of the coal discharge port by the coal discharge workers t...

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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