Abrasive stirring device for underground hydraulic slotting and abrasive water online continuous supply method

Abstract

The invention discloses an abrasive stirring device for underground hydraulic slotting and an abrasive water online continuous supply method . The abrasive material stirring device comprises a stirring tank, a feeding hopper used for providing abrasive materials into the stirring tank is arranged at the top of the stirring tank, a water inlet is formed in the bottom of the stirring tank, a water outlet main pipe is connected to the side portion of the stirring tank, and a water outlet pump is arranged on the water outlet main pipe; outlet water of the water outlet main pipe is used as water for jet flow slotting; the water inlet is connected with a water source through a water inlet pipe; the water pressure of the water source is higher than that when the stirring tank is filled with water; a slag discharge valve is downwards arranged at the bottom end of the stirring tank; a variable-frequency explosion-proof motor is arranged at the top end of the stirring tank, and an output shaft of the variable-frequency explosion-proof motor downwards extends into the stirring tank and is connected with a stirring mechanism. The invention further discloses a corresponding abrasive water online continuous supply method. The water flow is driven by a water distribution disc to rotate to form upward rotating water flow; and the rotating direction of the upward rotating water flow is opposite to that of each stirring blade layer, so that the turbulent flow is stronger, the stirring effect is improved, the abrasive material and the water are mixed more uniformly, and the jet flow slotting operation effect is improved.

Description

technical field [0001] The invention relates to the technical field of coal mine hydraulic slotting, in particular to the mixing technology of abrasive and water. Background technique [0002] As a widely used hydraulic measure, the hydraulic slotting technique has a remarkable application effect in coal seam permeability enhancement and roof control. [0003] The traditional hydraulic cutting technology uses pure water as the medium, and the cutting effect on hard coal and even rocks is not ideal. The specific performance is that the cutting depth is shallow, and there are problems such as poor coal seam permeability enhancement and limited directional expansion range of hydraulic fractures. . [0004] The addition and use of abrasives can significantly improve the hydraulic cutting effect. However, the density of common hydraulic slitting abrasives such as diamond and silicon carbide is significantly greater than that of water, and the existing abrasive stirring device c...

AI Technical Summary

Problems solved by technology

However, the density of common hydraulic cutting abrasives such as diamond and silicon carbide is significantly higher than that of water. The existing abrasive stirring device cannot achieve uniform mixing of abrasives, resulting in unsatisfactory hydraulic cutting results.

[0005] Therefore, in order to effectively solve the problem of poor hydraulic cutting effect due to uneven abrasive mixing, it is necessary to develop an abrasive stirring device for hydraulic cutting.

In the past, the abrasive water was mixed in advance and then supplied to the jet kerf, and it was not possible to continuously stir and supply abrasive water online during the jet kerf process.

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