About Causes and treatment methods of rock drill impact weakness
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 testing and testing of the hydraulic rock drill is proposed.
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 testing and testing of the hydraulic rock drill is proposed.
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, impact frequency, and energy utilization rate. For this study, a stress wave test bench was designed and built, according to international.
The rock drill shank is a critical component of hydraulic rock drills, responsible for transmitting rotational and impact energy. During operation, it endures complex loads delivered by the impact piston and rotary motor of the rock drill. A typical failure mode of rock drill shanks is abnormal.
Hydraulic rock drills, critical equipment in tunneling and rock mining operations, are highly regarded for their efficiency. However, prolonged contact with hard rock inevitably leads to various failures. Below, we explore fifteen common faults and their corresponding maintenance solutions. I.
In the drilling process of the rock drill, the impact piston impacts the shank to break the rock. e impact piston strikes the shank to produce the stress wave, and the stress wave is transmitted to the rock through multiple transmission, and then, the rock is broken. e re ected wave is absorbed and.
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6 FAQs about [Causes and treatment methods of rock drill impact weakness]
Does percussive drilling cause rock failure?
Over the last two decades, numerous experimental studies have been conducted to reveal the rock failure mechanisms in percussive drilling. These experiments were essential for observing rock fragmentation phenomena and developing models to study the mechanisms of rock failure caused by tools (Liao et al., 2021; Wang et al., 2006).
What is the dynamic bit-rock interaction mechanism in percussive drilling?
A thorough comprehension of the dynamic bit-rock interaction mechanism is of great significance to the design of the impact tools to improve drilling efficiency. Over the last two decades, numerous experimental studies have been conducted to reveal the rock failure mechanisms in percussive drilling.
Can a rock failure process be induced by different bits?
Liu et al. (2008) investigated the rock failure process induced by different bits with one to multiple buttons using the rock and tool interaction code (R-T2D).
Does percussive drilling have a higher efficiency if rock fractures in brittle mode?
The results can indicate that percussive drilling has a higher efficiency and ROP when the rock fractures in brittle mode. The failure mode of rock is related with the type of rock, the impact speed, and the back rake angle of the cutter. Both the penetration depth and fragmentation volume get the maximum values at a back rake angle of about 45°.
What is the rock failure mechanism under a single PDC cutter?
The rock failure mechanism under a single PDC cutter subjected to impact load is studied by conducting a series of drop tests in this work. Based on the discussions above, we can draw the following conclusions. There are two kinds of failure modes in craters: plastic failure and brittle failure.
Can percussive drilling be used for rock fragmentation and subground drilling?
Based on this principle, percussive drilling technology has been widely used for rock fragmentation and subground drilling in the civil and mining industry (Buyuksagis and Goktan, 2007; Gee et al., 2012; Ji et al., 2021).