Hydraulic auxiliary rock breaking mechanism with direction controllability and cutting method thereof

Abstract

The invention provides a hydraulic auxiliary rock breaking mechanism with direction controllability and a cutting method thereof. The mechanism comprises a cutting spindle, wherein a seal shaft is rotatably arranged in the cutting spindle; a hobbing cutter is fixed to one end of the cutting spindle; the cutting spindle and the seal shaft are connected with a motor; a seal shaft axial flow channelis arranged in the seal shaft; a seal shaft radial flow channel and a seal shaft circular arc-shaped groove flow channel are arranged on a cutter close section of the seal shaft; the seal shaft axialflow channel, the seal shaft radial flow channel and the seal shaft circular arc-shaped groove flow channel communicate sequentially; the hobbing cutter is provided with a plurality of hobbing cutterbody jet flow channels penetrating through a cutter body; and a plane on which the hobbing cutter body jet flow channels are located overlaps a plane on which the seal shaft circular arc-shaped grooveflow channel is located. According to the hydraulic auxiliary rock breaking mechanism with direction controllability and the cutting method thereof provided by the invention, the seal shaft, the cutting spindle and the hobbing cutter are matched to provide rotatable abrasive jet flow, the abrasive jet flow pre-slits a part where the hobbing cutter contacting a rock, and then the rotating hobbingcutter extrudes a rock body along the pre-slit crack so as to accomplish the high-efficient vibration cutting and crushing of the rock, so that the crushing efficiency of the rock body is improved.

Description

technical field [0001] The invention belongs to the technical field of rock breaking, and in particular relates to a direction-controllable hydraulic auxiliary rock breaking mechanism and a cutting method thereof. Background technique [0002] The energy industry is the basic industry of the national economy, and it is also a technology-intensive industry. In my country's resource consumption, the consumption of coal resources has always accounted for the main body of the total consumption, and my country's energy is characterized by more coal and less oil, so it will have an irreplaceable position as the main energy source of our country for a long period of time in the future. The rapid development of my country's economy in recent years has led to an increasing demand for coal energy. Nowadays, my country's coal mining has gradually developed to deep and complex strata, which brings difficulties in rock roadway excavation and leads to the imbalance of mining ratio, which...

AI Technical Summary

Problems solved by technology

However, in the excavation construction of hard rock mass, the existing equipment has problems such as serious wear and shedding of the ball teeth, low rock breaking efficiency and large amount of dust, which greatly reduces the mechanical impact rock breaking ability, efficiency, service life and reliability of the equipment. How to achieve safe and efficient crushing of hard coal rocks has become a key issue and difficulty in the efficient development of deep and complex stratum coal and other ore body resources

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