Device and method for breaking hard rocks by assisting coal mining machine with abrasive water jet

Abstract

The invention discloses a device and a method for breaking hard rocks by assisting a coal mining machine with an abrasive water jet. The device for breaking the hard rocks by assisting the coal miningmachine with the abrasive water jet comprises an abrasive supply system and a control system; the abrasive supply system comprises an abrasive storage device and an abrasive mixing infusion device arranged on a drive rocker arm; and the control system comprises the components including a PLC controller, a flowmeter, a torque sensor and a variable pump. During control, when hard coal rocks are cut, the abrasive storage device is started, the pressure of high-pressure water is increased, a diversion screw rod is controlled to run at a proper speed according to a water flow rate and torque data,abrasive particles with a required flow rate is introduced into an abrasive mixing pipe pin, and then are mixed with high-pressure water in the abrasive mixing pipe pin and an abrasive mixing pipe for two times and are uniformly pumped into a cutting pick, so that in the process, the rotating speed of the diversion screw rod is matched with the water flow rate and the torque through PLC control,accurate control on concentration of an abrasive is realized, and rock breaking can be effectively assisted; and the coal mining machine successfully cut the hard coal rocks.

Description

technical field [0001] The invention relates to a device and method for abrasive jet assisting a shearer to break hard rock, belonging to the technical field of coal mining. Background technique [0002] Due to the structural characteristics of my country's energy system, coal resources play an irreplaceable and important role in the development of my country's national economy. With the decrease of coal reserves, it has become an urgent task for my country's coal industry to increase the recovery rate of coal resources to reduce the loss and waste of coal resources mining. At present, most medium and small mines often abandon complex hard coal rock formations in the coal mining process; large-scale mechanized coal mining mines are in production, because the hard coal rock is hard, so the use of shearers It is very difficult and inefficient when cutting coal, and often causes failure of the shearer, which greatly affects the mining work. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

At present, most medium and small mines often abandon complex hard coal rock formations in the coal mining process; large-scale mechanized coal mining mines are in production, because the hard coal rock is hard, so the use of shearers It is very difficult to cut coal, the efficiency is low, and it often causes the failure of the shearer, which greatly affects the mining work

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