Grinding material continuous supply method

Abstract

The invention discloses a grinding material continuous supply method. The grinding material continuous supply method comprises a single-tank operation mode and a double-tank continuous operation mode.One material feeding mechanism is applied in the single-tank mode, a material feeding tank is filled with grinding materials in a material supplement state, and then the mode is switched to a workingmode for water jet operation; a high-pressure water pump is stopped after the water jet operation is finished; in the double-tank operation mode, a first material feeding mechanism and a second material feeding mechanism operate alternately according to the working state, and one material feeding mechanism of which the working state is finished operates according to the material supplement state,and the material feeding mechanism waits for the next time to operate according to the working state after the material feeding tank is filled with the grinding materials and a pressure adjusting valve is closed; and the first material feeding mechanism and the second material feeding mechanism operate alternately according to the working state for ceaseless water jet operation. Operation is performed in the different modes according to the different conditions, and the flexibility and adaptability of a coal mine underground grinding material continuous supply system are improved. Through alternate operation of the different material feeding mechanisms, ceaseless supply of the grinding materials for the water jet operation can be achieved even though only one high-pressure water mechanism.

Description

technical field [0001] The invention relates to the technical field of water jet operations such as hydraulic fracturing, in particular to an abrasive supply system and a supply method thereof. Background technique [0002] In recent years, techniques such as hydraulic punching, hydraulic slitting, and hydraulic fracturing have been widely used in the field of gas control and have achieved remarkable results. In order to make these processes have a wider range of application and better gas control effects, abrasives need to be added to the traditional pure water jet to increase the cutting ability of the jet or support artificial gaps. [0003] There are two modes of adding abrasives: pre-mixing and post-mixing. However, due to the influence of the structure of the post-mixing abrasive jet device, it is difficult to use in the field of gas control. Some scholars try to apply the pre-mixed abrasive jet in the field of gas control, but the traditional pre-mixed abrasive jet i...

AI Technical Summary

Problems solved by technology

[0004] The inventor studied the way of transporting abrasives by means of water jets, and found that the transport of abrasives by water jets has a greater wear on the pipeline

At the same time, most abrasives are easy to harden when exposed to water. During the experiment, the residual moisture can easily wet the abrasive at the bottom of the silo through the Venturi tube, causing the abrasive to harden and block at the bottom of the silo, affecting the normal feeding function.

If gas is used to transport abrasives, there are practical technical difficulties: using gas as a carrier, it is necessary to effectively separate the carrier gas from the abrasives, so as to avoid the carrier being ejected together with the abrasives, which will have a negative impact on the water jet operation and even lead to water jetting. job failed

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