Drilling, joint-cutting and fracturing integrated device for hard rock

Abstract

The invention discloses a Drilling, joint-cutting and fracturing integrated device for hard rock. The device comprises an oil cylinder supporting base, a pushing oil cylinder, a guide rail, a swing driving device, a rubber ring, a reverse extruding ring, a drill rod, a drill head, a flowing passage shaft, a rotary sealing shaft and a rotary sealing sleeve; the oil cylinder supporting base is fixedto the back end of the guide rail, the swing driving device is slidably connected with the guide rail, and the pushing oil cylinder is fixed to the oil cylinder supporting base; a piston rod of the pushing oil cylinder is connected with the swing driving device, the front end of an output shaft is separately connected with the back end of the drill rod, the front end of the drill rod and the backend of the drill head, and the flowing passage shaft installed on the output shaft and in the drill rod is connected with the back end of the drill head; the rotary sealing sleeve is fixed to the back end of the swing driving device, the rotary sealing shaft penetrating through the rotary sealing sleeve is connected with the flowing passage shaft, and the rubber ring is fixed to the front end ofthe swing driving device and connected with the reverse extruding ring. The device can achieve drilling, joint cutting and fracturing integration operation on hard rock, and has the advantages that the capacity of crushing hard rock (f)10) is high, the efficiency is high, and the quantity of produced dust is low.

Description

technical field [0001] The invention relates to an integrated device for drilling, cutting and fracturing hard rocks, which is suitable for roadway or tunnel rock mass excavation construction with a relatively high Platinum hardness coefficient (f>10). Background technique [0002] At present, coal mining has gradually developed to deep and complex strata, which puts forward higher requirements and new challenges for the safe and efficient mining technology and equipment of deep and complex coal resources. Due to the increase of in-situ stress, the elastic modulus, hardness and failure strength of coal rocks in deep and complex strata usually increase accordingly, and the uniaxial compressive strength often reaches above 150MPa. Although the blasting excavation method has the characteristics of flexibility, convenience, low cost, strong adaptability, and unaffected by changes in geological conditions, it has disadvantages such as many procedures, low safety, and low excav...

AI Technical Summary

Problems solved by technology

Although the blasting excavation method has the characteristics of flexibility, convenience, low cost, strong adaptability, and unaffected by changes in geological conditions, it has disadvantages such as many procedures, low safety, and low excavation efficiency.

When mechanically cutting and breaking rocks, the tool wears seriously and consumes a lot. It is mainly used for cutting and breaking coal rocks with a Platinum hardness coefficient f≤8; mechanical impact can break most coal rocks, but it works in hard coal rocks (f>10). There are problems such as serious wear and shedding of ball teeth, low rock breaking efficiency and large amount of dust, which greatly reduce the mechanical impact rock breaking ability, efficiency, service life and reliability of equipment. How to achieve safe and efficient crushing of hard coal rock has become a deep, Key issues and difficulties in the efficient development of coal and other ore body resources in complex strata

[0003] At present, the integrated technology of drilling, cutting and fracturing for hard rock (f>10) has not yet appeared, and there are still many problems in this technology, such as the difficulty of sealing the rock passage, which need to be overcome urgently, so as to ensure that under the action of high-pressure abrasives , the annular gap that has been cut can be fractured

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