Adaptive abrasive slurry jet mining system and method

Abstract

The invention discloses an adaptive abrasive slurry jet mining system. The system employs a single chip microcomputer, an electromagnetic valve, a frequency converter and other elements to control close cooperation of a roller coal cutter and an abrasive slurry jet system, and realizes efficient mining of thin coal seam with a complex geological structure. The adaptive abrasive slurry jet mining system provided by the invention employs the single chip microcomputer to receive a cutting force signal on the roller, automatically adjusts the frequency converter and the electromagnetic valve, controls the rise and fall of the abrasive slurry jet system pressure and switch of the abrasive slurry, thus realizing joint-cutting of the high pressure abrasive slurry jet before roller crushing paring and dust fall automation of low pressure pure water jet during roller mining of a coal seam, also the contradictions of ''small body and big power'' in a narrow space during thin coal seam mining can be effectively solved, the thin coal seam mining efficiency is improved, and the cutting tool wear is reduced.

Description

technical field [0001] The invention relates to a water jet system and method, in particular to an adaptive abrasive slurry jet mining system suitable for mining thin coal seams containing hard gangue under complex geological conditions. Background technique [0002] Thin coal seams are widely distributed in my country, and more than 85% of the mining areas have thin coal seams (below 1.3 meters). Among the 95 key mining group companies in the country, 80 of the 445 mines of the group companies have thin coal seams, and the recoverable reserves reach 6.15 billion tons, accounting for about 19% of the total recoverable coal reserves. However, the amount of coal extracted from thin coal seams each year only accounts for 10.4% of the country's total output, which is far below the proportion of reserves. The thin coal seam mining mainly uses the drum shearer, relying on the picks installed on the drum and the coal wall to mine coal, but it is difficult to overcome the contradict...

AI Technical Summary

Problems solved by technology

The thin coal seam mining mainly uses the drum shearer, relying on the picks installed on the drum and the coal wall to mine coal, but it is difficult to overcome the contradiction of "small body, high power" in a small space, and cannot cope with complex geology Mining of thin coal seams with structures (including hard gangue, faults and metal compound nodules, etc.)

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