Carving device and method for front mixing type abrasive water jet directional cutting top plate

An abrasive water jet and roof technology, which is used in cutting machinery, discharge machinery, earth-moving drilling and mining, etc., can solve the problems of the adverse effect of the surrounding rock in the stope and the failure to use it, and achieves easy popularization, long acceleration time and high energy. Effect
CN110685683APending Publication Date: 2020-01-14HENAN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN POLYTECHNIC UNIV
Publication Date
2020-01-14

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Abstract

The invention belongs to the technical field of coal stope and roadway surrounding rock control, and particularly discloses a carving device and method for a front mixing type abrasive water jet directional cutting top plate. The carving device comprises a water supply box and an anchor agitator mounted in the water supply box. A water pump is arranged at the top of the water supply box, abrasivewater in the water supply box is pumped into a slush pump through the water pump, and a pressure gauge is arranged on a water outlet pipeline of the slush pump. An outlet of the water outlet pipelinecommunicates with a directional drilling rod, and a drilling rod transmission device is arranged at the inlet end of the directional drilling rod. A drilling rod direction control device is arranged at the outlet end of the directional drilling rod, and a slotting drill bit is arranged at an outlet of the directional drilling rod. The carving device has the advantages of being convenient to use and safe in use.
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Description

technical field

[0001] The invention belongs to the technical field of coal stope and roadway surrounding rock control technology, and in particular relates to a roof caving device and method for directional cutting of roof plates by a pre-mixed abrasive water jet. Background technique

[0002] The occurrence conditions of coal seams in my country are complex. Among them, one-third of the coal seams with hard roofs and difficult to collapse, such roof rocks have high strength, large thickness and strong integrity, and are difficult to collapse naturally after the coal seams are mined. The occurrence of air leakage and the sudden collapse of the roof will bring the gas in the goaf to the working face, causing the gas to exceed the limit, increasing the strength of the initial pressure, destroying the working face and even causing the roadway to collapse. Research is significant.

[0003] The currently used coal seam roof cutting methods mainly include: hydraulic slitting, blas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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