According to current research, three commonly used rock-breaking techniques can be used: explosive blasting, L-CDRB, and HF. The pressure-loading characteristics of different rock-breaking methods are listed in Table 1. The rock-breaking process of L-CDRB technology is divided into two parts. The first part is the …

Rock excavation is an essential phase in mining and civil engineering projects; it can be defined as the process of removing hard, compacted, or cemented material by using conventional or alternative blasting methods. Many methods have been used since the …

The pre-grooving-assisted rock-breaking method proposed in this paper also uses pre-grooving to provide free surfaces for the disc cutter to break the rock. The rock-breaking effect of free surface assisted cutter was studied by using PFC2D software and physical experiments. The rock-breaking process of the cutter under different free …

For centuries, the conventional method of rock breaking involved the use of explosives, with all its associated risks and environmental concerns. However, in recent years, the industry has witnessed remarkable advancements in non-explosive rock-breaking techniques. ... Diamond wire cutting is commonly used in the mining and …

The vibration of rock breaking in tunnel excavation may cause serious damage to nearby buildings if it is not controlled properly. With reference to a hard rock tunnel in China, the vibration response to the high-pressure gas expansion method (HPGEM), an emerging rock-breaking approach, was investigated with field tests, …

To study the rock breaking method under the free surface induced by disc cutter, the rock breaking simulations were first conducted based on the discrete element method, and the dynamic process of rock breaking under the free surface was studied including stressed zone, crush zone, crack initiation and propagation. Then the crack …

A new, high-efficiency technology for fracturing and breaking rocks is required. Due to various advantages including high efficiency, energy-saving, and having no secondary pollution, the technology of microwave-induced fracturing of hard rock has been considered as a potential method for rock fracturing and breaking. Aiming at the …

Borehole wall collapse is rare in the drilling of carbonate rock formations. However, several wells in the Maantang–Leikoupo carbonate formation have collapsed and released blocks to varying degrees, which have caused sticking and hindered efficient development of oil and gas resources. Thus, through the study of macroscopic and …

Innovations in Rock Breaking: Beyond Explosives For centuries, the conventional method of rock breaking involved the use of explosives, with all its associated risks and environmental concerns. …

In this paper, we propose an ultrasonically coupled mechanical rock-breaking technology, creatively design an ultrasonically coupled mechanical rock-breaking drum, concurrently develop an ultrasonic cracking simulation method based on test coordination, and study the cracking mechanism and characteristics of ultrasonically pre …

Compared to traditional methods of rock breaking such as drilling and blasting, piston rock splitters offer several advantages. They are safer, quieter, and less disruptive to the surrounding environment. ... Piston rock splitters are commonly used in construction, mining, and demolition projects. They can be used to break apart rocks of ...

As a non-explosive low-disturbance rock breaking technology, carbon dioxide phase transition blasting (CDPTB) is widely used in rock breaking projects such as pressure relief and permeability …

Significant advances have been made in non-explosive rock breaking techniques in the past two decades. This monograph focuses specifically on …

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As shown in Figure 5, the commonly used rock breaking methods are in the quasi-static or dynamic stage. ... A Novel Carbon Dioxide Phase Transition Rock Breaking Technology: Theory and Application ...

Selecting the right rock-breaking tool is essential to the success of your project. By understanding your rock type, assessing the size and volume of rocks, considering environmental conditions, …

assisted rock-breaking technology can signicantly improve the rock-breaking performance of the tool. The above-men - tioned research on jet grooving-assisted rock-breaking tech - nology provides inspiration and condence for the research on water jet–assisted disc cutter rock-breaking technology. Observing the structure of the TBM …

To better reveal the rock damage evolution law during rock breaking by Polycrystalline Diamond Compact (PDC) cutter, the Finite-Discrete-Infinite Element Method (FDIEM) was adopted to establish the 3D models for rock breaking by PDC cutter pressing and cutting. It was found that the cutter tip was the starting point of crack initiation during …

There are three commonly used rock-breaking methods based on the cutter movement pattern: indentation test (Liu et al. 2015), linear cutting test (Abu ... Currently, the most frequently employed numerical methods for rock-breaking studies using TBM disk cutters are the nite element method (FEM) (Cho et al. 2010; Gao et al.

The waterjet-assisted rock-breaking method is commonly used, considering it is highly beneficial, and has the least environmental impact. Therefore, this study focuses on the mechanism of waterjet-assisted rock-breaking methods. According to the dominant role of the rock-breaking effect, ...

Rock breaking work is often required in engineering construction. Drilling and blasting has become the most commonly used rock breaking method due to its high efficiency and huge scale (DOBRATZ et al. 1985; SANCHIDRIáN 2018; Haugen 2018).However, with the progress of society, explosives have a high risk factor, …

The BQ rock mass classification method is a surrounding rock classification method that is commonly used in China, and it can evaluate surrounding rock stability from three ... we proposed a classification system for surrounding rock excavatability based on TBM rock-breaking parameters, and a method for the intelligent identification of this ...

The most common use of these techniques is to make an easy access point to the top half of the Nether by phasing through the top layer of bedrock and then breaking the bedrock to put up a ladder or ... Depending on the method, breaking bedrock can either be a simple build, or a complex process. 1.10-1.16+ Method [edit | edit source] Video by ...

Discover the revolution in rock breaking techniques! Safer, precise, and eco-friendly alternatives to blasting. Explore chemical, hydraulic, mechanical, and thermal …

The raise boring machine, which plays a crucial role in wellbore construction, has been widely applied in subway tunnels and mine construction projects. High levels of quality and safety, make it recognized and promoted by an increasing number of users. The tipped hob as a rock-breaking cutter of the raise boring machine poses a direct …

One commonly used chemical agent is expansive mortar, also known as non-explosive demolition agent (NEDA). NEDA is a powdered substance that, when mixed with water and poured into pre-drilled holes, expands with tremendous force, causing the rock to crack. ... Mechanical Rock Breaking. Mechanical methods rely on mechanical …

1970's, the Western developed countries began to study the safety of breaking rock. This paper introduces different methods and their progress to safely break rock.

This review showed that hard rock breaking can be executed effectively and safely using alternative methods, which have a wide range of advantages, including safe operation, ease of use, and ...

Among them, tunnel boring machines (TBM), crushing hammers and vertical roller mills (VRM) are the most common mechanical rock breaking methods [[5], [6], [7]]. These machines have the same bottleneck problem, that is, rock-breaking cutters such as TBM cutter heads, crushing hammer heads, and VRM grinding rollers will be severely …

Among all kinds of rock-breaking methods, ... (19 inch) is the most common. As there is no unified design standard for indenter size in the test, the cross section of the disc cutter with the larger diameter penetrating into the rock can be regarded as a rectangular plane. Therefore, considering the width of the sample, the simplified …