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Dynamic tension shear tunneling drill bit and composite rock breaking method

A drill bit and dynamic technology, applied in drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of low driving efficiency and high drill bit wear rate, and achieve the effect of improving rock breaking efficiency, reducing replacement frequency and improving energy utilization rate.

Active Publication Date: 2022-07-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main form of rock breaking in this type of patent is compression shear rock breaking, which still has the problems of low excavation efficiency and high wear rate of drill bits.

Method used

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  • Dynamic tension shear tunneling drill bit and composite rock breaking method
  • Dynamic tension shear tunneling drill bit and composite rock breaking method
  • Dynamic tension shear tunneling drill bit and composite rock breaking method

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Embodiment Construction

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present i...

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Abstract

The invention discloses a dynamic tension shear tunneling drill bit and a composite rock breaking method. The drill bit head comprises a rotary drill bit, an impact drill bit and high-pressure nozzles, the high-pressure nozzles are distributed on the working face of the impact drill bit, the impact drill bit comprises a plurality of centrosymmetric impact structures, the rotary drill bit comprises a plurality of centrosymmetric rotary structures, and the number of the impact structures corresponds to that of the rotary structures. The impact structure of the impact drill bit and the rotating structure of the rotating drill bit are arranged in a spaced mode, and the impact structure and the rotating structure are connected in a sliding mode in the axial direction. The tunneling efficiency in the deep complex hard rock geological environment is improved, and drill bit abrasion is reduced.

Description

technical field [0001] The invention relates to the field of rock drilling and excavation in mines, in particular to a dynamic pull-shear excavation drill bit and a composite rock breaking method. Background technique [0002] With the rapid development of the world's scientific and technological level, the demand for mineral resources is also increasing, and the mineral resources located in the shallow part of the earth are gradually being exploited. Deep mining will become the norm for more and more mines, and the increase in mining depth means that the frequency of hard rock formations will increase. The current drilling technology for hard rock mining has low level of excavation, high drill bit wear rate and high wear rate. The problem of high tunneling temperature. [0003] At present, the traditional driving drill bits are no longer able to meet the needs of mine production work, and various types and shapes of driving drill bits are booming. However, these drill bit...

Claims

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Application Information

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IPC IPC(8): E21B10/42E21B10/43E21B10/36E21B10/60E21B44/00
CPCE21B10/42E21B10/43E21B10/36E21B10/60E21B44/00Y02P70/10
Inventor 董陇军张燊
Owner CENT SOUTH UNIV
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