Device and method for testing ultrasonic vibratory rock-breaking effective work

Abstract

The invention discloses a device and a method for testing ultrasonic vibratory rock-breaking effective work and belongs to the technical field of ultrasonic vibratory percussive drilling in geologicalengineering. The device comprises an automatic pressurization system, an ultrasonic vibration system and a temperature measurement system, wherein a hydraulic control cabinet controls the automatic pressurization system to work, so that an amplitude-change pole in the ultrasonic vibration system descends and passes through a working hole positioned in the center of a thermal cover in the temperature measurement system, and an ultrasonic generator is started; and the ultrasonic generator transmits a signal to an ultrasonic transducer, the ultrasonic transducer receives the signal and convertsthe signal into mechanical vibration to be transferred to the amplitude-change pole so as to apply constant pressure to a rock sample, and then an experiment is conducted. According to the device andthe method disclosed by the invention, work converted into heat energy in the ultrasonic vibratory rock-breaking process is measured by utilizing a temperature difference of drilling fluid before andafter the experiment, and the effective work of the broken rock is determined according to total work of the ultrasonic vibration system, so that a relation between the rock breaking energy consumption and the breaking effect is achieved. The device and the method have important and profound significances for researching the ultrasonic vibratory rock-breaking theory and method and developing the drilling tool.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic vibration drilling in geological engineering, and in particular relates to a testing device and method for the effective work of rock breaking by ultrasonic vibration, which are mainly used in the fields of geological exploration, tunneling, engineering construction and the like. Background technique [0002] Today, hard rock accounts for an increasing proportion of drilling projects. Compared with the problems of short drill bit life, low drilling efficiency and high drilling cost in the traditional rock crushing method, the ultrasonic vibration method can produce higher crushing efficiency for rock crushing. The principle is that the ultrasonic wave is transmitted to the drill bit through the horn, and a stable high-frequency vibration of a certain frequency is applied to the rock to be broken, so that the rock produces a resonance phenomenon, and the weak area with micro-cracks in the rock i...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: Aiming at the inability to quantify the rock breaking energy, lack of simulation conditions, relatively large errors and pollution problems existing in the existing ultrasonic vibration rock breaking experiment technology, the present invention provides a simple, safe and reliable The testing device and method for the effective work of rock breaking by ultrasonic vibration, using the temperature difference of the drilling fluid before and after the experiment to calculate, quantify the energy of rock breaking, and fill in the relevant data gap

Images