flame jet cutting method used in mining of granite

There are a very few mines which adopt the modern method of block splitting by using flame-jet burner and diamond wire saw for cutting. Heavy-duty cranes of capacity to handle 50-tonne blocks from a depth of more than 60 m have brought revolution in granite quarrying by …

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Use of High Pressure Water Jets for Cutting Granite . ... Conventional methods of quarrying granite are becoming increasingly expensive in real and environmental terms. The existing flame torch is, for example, a slow, destructive and noisy method of creating slots. In order to overcome the problems of current equipment, a high pressure water ...

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Download Citation | Research on rock-breaking mechanism of cross-cutting PDC bit | Cross-cutting PDC (Polycrystalline Diamond Compact) bit is an efficient drilling technology that increases the ...

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For drilling and cutting a submarine rock through the use of this flame jet, the flame-jet device or drill is placed on the rock with the nozzle 2 directed toward the surface of the rock, and the flame is caused to be jetted as described above, whereupon the part of the rock thus subjected to the flame jet undergoes thermal disintegration or ...

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Jan 01, 1986· The burner, which resembles a small jet engine with its exhaust pointed downward, is the forerunner of a flame-jet burner used to make a 20- to 25-cm-diameter by 31 l-m-deep hole in granite at Conway, New Hampshire, in 1981.

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Dec 01, 2017· 3. Method to predict abrasive waterjet performance. Although the destruction of hard rock is considered to be the main application for AWJ in mining, this technology can also be used (as mentioned above) to cut non-rock materials. Therefore, there is a need for a method to predict the efficiency of cutting with AWJs that is highly accurate ...

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promising drilling method, where conventional rotary drilling is thermally assisted by a flame-jet, is evaluated. Here, the thermal weakening of the rock material, performed by flame-jets, facilitates the subsequent mechanical removal performed by conventional cutters.

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Flame cutting or jet channeling is a common method for cutting granite. Flame from a torch is passed over the rock and the intense heat creates a thermal shock, which causes the rock to spall. This technique does not work in quartz-free rocks, or carbonate rocks that fuse or calcine.

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Mining Association, 46 p. Used by permission. ... for granite. The jet piercing method cuts a channel several centimeters wide by a flame drill. Combustion of oxygen (brought to the quarry in liquid form in tank trucks) and fuel oil fed through a nozzle generates a temperature of over ... A third method of cutting the block of granite is to use a

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China Waterjet Cutting manufacturers - Select 2021 high quality Waterjet Cutting products in best price from certified Chinese Cutting Saw, Die Cutting suppliers, wholesalers and factory on …

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Mar 15, 2020· The Need for Hydrothermal Flame Research If jet flames are to be used in a deep borehole environment to generate the heat fluxes needed to induce thermal spallation, then the technology to make flames in a high pressure, high density environment is needed. Figure 1 shows that if the water-based drilling fluid is used, the bottom hole

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use flame-resistant sheets or covers to prevent hot particles passing through openings in floors and walls (doorways, windows, cable runs, etc); ... If you can't remove the tyre, use cold cutting methods, eg a saw or hydraulic shears. Health and Safety Executive Safety in gas welding, cutting and similar processes Page 5 of 11

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mining - mining - Quarrying: Although seldom used to form entire structures, stone is greatly valued for its aesthetic appeal, durability, and ease of maintenance. The most popular types include granite, limestone, sandstone, marble, slate, gneiss, and serpentine. All natural stone used for structural support, curtain walls, veneer, floor tile, roofing, or strictly ornamental purposes is ...

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The most active use of heat in recent and current opera- tions has been that of the flame jet for drilling, and the cutting and facing of spallable monument stone. Its successful employment led to a research project (1) on the feasibility of a flame jet tunneling ma- chine, i.e., the utilization of flame jets for weakening hard rock to

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A total direct operating cost for drilling in granite using a flame-jet spallation drill was estimated by Browning (1981) to be approximately $9/m in 1991$ (about $3/ft) compared to "trouble-free" well drilling costs for conventional rotary methods in similar rock to depths of 3 to 7 km (10000 to 21000 ft) of $300 to $900/m ($100 to $300/ft ...

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The steel grooved saw blade is specially designed to be used on the new high gang-saws for producing large granite slabs, which are to work with cutting fluid mixed well by water, steel grit and lime together for cutting granite blocks.ProDrill. steel blade consumption is 1-1.5cm per s.q.m, steel grit consumption 1.2-1.3kg per s.q. meter

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Dec 23, 2015· In the past, China stone mining used to adopt explosions and flame cutting to extract granite rough block; the advantages of this were that the mining technology is easy to grasp, it …

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pressure jets (3). This type of operation is still used for mining sand by Ontario Sand Company of Ontario, Illinois. In recent years, however, interest has turned to using high pressure water jets as a means of cutting and drilling rock i._n lieu of conventional methods.

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May 10, 2018· Oxy profile cutting is a low cost method of cutting two dimensional profiles from steel sheet and plate using a CNC controlled cutting machine. An Oxy Acetylene flame is used to profile cut the metal and is best used where heat is not of concern and for thicker plate up to 300mm.

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quarrying is presented The rock commercially named Piracaia Granite is used as construction material or in ... tation using flame jet technology was presented about the winning of blocks (Hennies et al, 1999) ... Recently a revolutionary method appeared for precise cutting of …

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have adopted the modern method of block splitting by using flame-jet burner and diamond wire saw for cutting. Heavy-duty cranes of capacity to handle 50-tonne blocks from a depth of more than 60 m has brought revolution in granite quarrying by way of augmenting output with less cost. The percentage recovery of granite on the whole is quite

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Several current hard-rock drilling methods using supersonic flame-jets as heat sources exploit this behaviour for efficient granite quarrying or blasthole formation. The recent application of weibull's theory of rock failure to quantitatively analyze rock spallation has been extended to allow prediction of chip size distributions and rock ...

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Stone Cutting. This can be used to achieve intricate designs even on highly glossy and polished surfaces. In fact, using this method you can get ceramic tiles, granite, marble, slate, and limestone cut out to any of your designs. Even laminates and composites can be cut without a trace of de-lamination.

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Mar 12, 2019· Abrasive waterjet cutting technology has come back into use in the field of rock excavation (such as for tunneling) due to the need for precision construction with low vibration. Because the abrasive particles play an important role in efficient erosion during the cutting process, the abrasive characteristics strongly affect the rock cutting performance.

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seals) and remote methods for suppressing the fire using, the injection of inert gas, gas-enhanced and jet engine exhaust gases into the fire zone. This paper presents a summary of remote mine firefighting technologies used in the U.S. and the results of completed NIOSH research. 1.0 Introduction

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The channel burner is basically a jet burning tip, on a long handle, fueled by compressed air and diesel fuel. It produces an intensely hot flame that spalls the rock when directed against it. They are used in the dimension granite industry to cut granite blocks from the quarry.

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Aug 19, 2020· The granite is composed of 62% feldspar, 32% quartz, 5% biotite and 1% hornblende. The physical and mechanical properties of this granite are summarized in Table 1. 18 high-quality samples with 63 mm diameter and 15 mm thickness were cut from the granite cores at 5.3–6.3 m depth below the ground surface. No visible cracks were observed on the ...

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Nov 07, 2020· Different methods have been used for construction materials' extraction so far. Over the years and with technological progresses, the traditional methods were outdated. The selection of the most suitable mining methods is a multi-criteria decision that should be made according to effective criteria. The purpose of this study is to apply a suitable method for the extraction of building stones ...

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