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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

Pending Publication Date: 2020-01-14
HENAN POLYTECHNIC UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The current method of directional cutting the roof is mainly directional blasting to cut the seam. This method has adverse effects on the underground gas control work and the surrounding rock of the stope during the charging and detonation process, and there is a relatively high risk. Currently, no relatively safe roof is used. directional cutting method

Method used

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

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Embodiment Construction

[0037] like figure 1 , shown in 2, 3, 4, 5, 6, 7, a top setting device for directional cutting of the top plate by a pre-mixed abrasive water jet, the device includes an anchor mixer 1, a water supply tank 2, a water pump 3, and a pipeline 4 , mud pump 5, pressure gauge 6, drill pipe transmission device 7, directional drill pipe 8, drill pipe direction control device 9, slotted bit 10, etc.; the drill pipe transmission device 7 includes two left and right parallel support piers 7.1 , each supporting pier 7.1 is provided with a horizontal through hole at the top and bottom, and two upper and lower parallel screw rods 7.7 are arranged between the two supporting piers 7.1. Both ends of the screw rod 7.7 pass through the supporting bearings installed in the through holes 7.3 It is rotatably connected with the support pier 7.1. The leftmost end of each lead screw 7.7 is driven to rotate by the motor 7.2. There is also a directional drill pipe installation hole in the middle of each...

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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.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C25/60E21C37/12E21C41/18
CPCE21C25/60E21C37/12E21C41/18
Inventor 刘勇魏建平刘笑天王琛琛崔家玮李志飞吴姣姣
Owner HENAN POLYTECHNIC UNIV
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