Rock drill impact frequency test method
Fault Diagnosis Research on Impact System of Hydraulic Rock
In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal mechanism
Impact performance optimization for hydraulic rock
In response to the issues of overheating of the shell and insufficient impact energy of the hydraulic rock drill, this paper focuses on the
Impact performance for high frequency hydraulic rock drill
Abstract A high frequency hydraulic rock drill drifter with sleeve valve is developed to use on arm of excavator. In order to ensure optimal working parameters of impact system for the new
Working principle of rock drill. | Download Scientific
To optimize and improve the impact performance of a hydraulic rock drill, it is helpful to test the stress waves of the drill and analyze the impact energy,
Investigations on optimal parameters for enhancing penetration
Initially, single-factor experiments were conducted to analyze the influence of critical engineering and geological parameters—including impact frequency, weight on bit (WOB),
Experimental study on impact coupling characteristics
The impact system of rock drill mainly consists of impact piston, reversing valve and high-pressure accumulator, which is a complex system of
Impact performance optimization for hydraulic rock drill
The rock drill impact system is optimized using the orthogonal test method, resulting in an improvement in drilling efficiency of over 17.7%. Yong et al.7 explore the impact performance
Dynamic simulation and test research of impact performance of
In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal
New Impact test method for rock drill inserts
The developed test method is based on a Charpy pendulum arrangement and utilizes, as in rock drilling, impact of cylindrical bars to achieve the high impact force sufficient to fracture the rock
The rock breaking capability analyses of sonic drilling
The longitudinal vibration of the drilling string is not only adopted in sonic drilling rigs but also has been successfully applied to improve the drilling efficiency in deep rock
Laboratory Testing and Interpretation of Rock Properties
8.1 INTRODUCTION Laboratory rock testing is performed to determine the strength and elastic properties of intact specimens and the potential for degradation and disintegration of the rock
Prediction Model of Drilling Performance for Percussive Rock Drilling
A drill bit motion model was developed to represent the dynamics of a drill bit impacted by a dropped piston and explain the impact stress propagation and rock-crushing
Fault Diagnosis Research on Impact System of Hydraulic Rock Drill
In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal mechanism
Theoretical and numerical analysis of the rock breaking process
They employed an orthogonal experimental method with range and variance analysis to study the influence of impact energy, impact frequency, rotation speed, drilling
Impact performance optimization for hydraulic rock
Owing to the limited accuracy and measurement challenges of traditional rock drill testing methods like the stress wave method, a high-precision, non-contact
Fault Diagnosis Research on Impact System of Hydraulic
48 Hz, the velocity of the impact piston is increased from 9.7 m/s to 12.1 m/s, and the overall perfor-mance of the rock drill is greatly improved. e internal mechanism testing method reacts
Hard rock drilling characteristics under axial-torsional
Axial-torsional coupling impact drilling (ATCID) is a promising rock breaking method to excavate energy mineral resource from deep and hard formations. Nevertheless, the
Theoretical and Experimental Study of the Effects of
Using a self-designed hydraulic impact drilling test-bed and rock core drill, six groups of cylindrical granite specimens (93 mm dia. × 200 mm)
Percussion characteristic analysis for hydraulic rock drill with
Then, the velocity curve of impact piston was obtained after judging the striking point through the feature of rear-chamber''s pressure spike, so were the rock drill''s impact energy, impact
Numerical investigation of rock-breaking mechanisms and
The results indicated that cutter penetration depth during rotary percussion drilling could be increased by 16.04% compared to that during conventional drilling. Under the same
Determination of Efficient Rotary Percussive Drilling
Drilling methods using impact drills based on various models of impact tools can be optimised in accordance with the energy criterion of rock
(PDF) Influence of Piston Mass and Working Pressure
The impact energy, impact frequency, and energy utilization rate of two different hydraulic rock drill pistons in low, middle, and high gear were
Study on Compound Percussive Drilling: Rock
Finally, the field applications of compound percussive drilling were conducted. Matching higher impact frequency under low-speed conditions and
Prediction Model of Drilling Performance for
A drill bit motion model was developed to represent the dynamics of a drill bit impacted by a dropped piston and explain the impact stress
Identification of Impact Frequency for Down-the-Hole Drills
In rotary-percussion drilling, the impact frequency is a crucial variable that is closely linked to operational factors that determine the efficacy of the drilling process, such as the rate
Fault Diagnosis Research on Impact System of Hydraulic Rock
Abstract In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal
Essential Role of Impact Testing for DTH Bits
Ever wondered what keeps your drilling operations smooth and trouble-free? Impact testing is crucial for ensuring DTH drill bits can withstand the intense forces they face
Fault Diagnosis Research on Impact System of Hydraulic Rock Drill
In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal
Force-penetration curves of a button bit generated during
Percussion rock drills have been widely used in mine development and civil engineering. During percussive rock drilling, a hammer in the rock drill collides with a shank
Identification of Impact Frequency for Down-the-Hole
In rotary-percussion drilling, the impact frequency is a crucial variable that is closely linked to operational factors that determine the efficacy
Fault Diagnosis Research on Impact System of
In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis
Identification of Impact Frequency for Down-the-Hole Drills
The estimated impact frequency obtained with the three proposed methods for an experimental reference setup was consistent with values obtained from an independent analysis of pressure
Experimental study on impact coupling characteristics of high
This article addresses the impact-powerlessness problem associated with unconstant-pressurized cham-ber rock drills, particularly in the context of large holes and hard rock working conditions.
A data-driven dynamic method of downhole rock characterisation
Abstract For the real-time characterisation of an inhomogeneous impact inhibiting constraint such as downhole rock layers, an unconventional method using machine learning
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