Mining Free Full-Text Precision Rock Excavation: Beyond Controlled
The first important uses of this technique were in the field of rock excavation performed by explosives; it has led, over time, to a currently mature and widespread solution . The split surface is a fracture obtained by applying a well-measured and -directed 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 A review of some nonexplosive alternative methods to conventional rock
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Precision Rock Excavation: Beyond Controlled Blasting
Mining. 2021, 1 194. 2. Excavation Technique and the Compliance with Excavation Contour. Examples of production blasts applied to two different construction In deep mining, dynamic disturbances such as mechanical excavation and blasting vibration cause internal damage to ore and rock samples, leading to a reduction Evaluation of excavation method on point load strength of
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Frontiers Editorial: Deep rock mass engineering: Excavation
With the development of the social economy, the depth of underground excavation has seen a significant increase in the fields of mining, tunnelling, hydropower, ABSTRACT. Blasting induces strong ground motions and fracturing of rock mass in rock excavations. The excavation of rocks in mining and civil engineering applications by Rock excavation techniques 6 Rock Mechanics and Rock
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New and Improved methods for rock excavation in mining
This work will help evaluate mechanical excavation in the mining and tunneling industries under a variety of ground conditions including hard rock, sensitive rock, or mixed ground Excavation Rock. Rock excavation shall be defined as the excavation of all hard, compacted or cemented materials that require blasting or the use of ripping and excavating Excavation Rock an overview ScienceDirect Topics
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(PDF) Optimization of Blasting Parameters- A case
In hard rock mining, blasting is the most productive excavation technique applied to fragment in-situ rock to the required size for efficient loading and crushing.The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and Mining Free Full-Text Precision Rock Excavation: Beyond Controlled
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Epiroc South Africa Epiroc
2 天之前Epiroc is your partner for mining and construction equipment. Originating from the Mining and Rock Excavation Technique business area and the Hydraulic Attachment Tools division of Atlas Copco, Epiroc was This study proposed a novel liquid carbon dioxide rock-breaking technology. It has great advantages on less vibration, non-flame and non-noxious gases than explosive blasting, and more economic and high-efficient than traditional non-explosive techniques. As pressure sensor is setup at around 850 mm from the test tube, the peak shock pressureAn experimental study of a novel liquid carbon dioxide rock-breaking
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Mining Free Full-Text Precision Rock Excavation: Beyond Controlled
The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and When the stress-induced risks to a projects warrant it, in situ stress must be measured. However, as the stress-induced risks increase, i.e., the stress magnitudes approach the rock mass strength, the confidence in commonly used stress measurement techniques decrease.The design of underground openings at depth requires knowledge Stress, instability and design of underground excavations
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5. Rock Excavation Tools Drilling and Excavation
Thermal spalling drills such as jet-piercing and forced-flame drills heat rocks to 370 to 540°C (700 to 1000°F) to create thermal stresses that spall the rock ().These devices have limited application because most rocks will not thermally spall (Maurer, 1968, 1980). Melting and vaporization drills utilize high-temperature devices such as lasers or electron beams to The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and Mining Free Full-Text Precision Rock Excavation: Beyond
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Epiroc United Kingdom Epiroc
2 天之前We provide innovative equipment, consumables and services for drilling and rock excavation. Whether the application is surface and underground mining, infrastructure, civil works, well drilling or geotechnical, Mining and Rock Excavation Technique will ensure to increase customers’ productivity.Drill-and-blast excavation is commonly used in hard rock tunnel excavation due to its economic feasibility and adaptability to changing rock mass conditions in both mining and civil engineering. In civil engineering, drill-and-blast is often used as part of the New Austrian Tunnelling Method (NATM), in which the primary support of the tunnel isApplied Sciences Free Full-Text Development and
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Mineral Resource Extraction SpringerLink
Summary. Mineral extraction is the procedure of excavation and recuperation of mineralization and associated waste rock from the crust of the Earth to derive a profit. This chapter reviews the main topics related to mineral resource extraction from surface and underground methods to drilling and blasting. In this process, The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and Mining Free Full-Text Precision Rock Excavation: Beyond
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安百拓贸易有限公司 epiroc.cn
Epiroc is your partner for mining and construction equipment. Originating from the Mining and Rock Excavation Technique business area and the Hydraulic Attachment Tools division of Atlas Copco, Epiroc was formed to be a stronger ally for you. By building on proven expertise and performance with the same people and a bold new The strictness of the result of an excavation, whether mechanical or by means of explosives, is naturally conditioned by its objective and, therefore, by the type of technique applied to achieve it. To attain the best results in terms of rock breakage, and with respect to the final profile, it is important to evaluate the specific excavation energy and Mining Free Full-Text Precision Rock Excavation: Beyond
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(PDF) Optimization of Blasting Parameters- A case study
In hard rock mining, blasting is the most productive excavation technique applied to fragment in-situ rock to the required size for efficient loading and crushing.Download chapter PDF. Contour blasting is also called controlled blasting as its main purpose is to minimize the damage to the rock (overbreak) beyond the boundary of the designed contour of the excavation (Fig. 10.1 ). These techniques are used in both surface and underground excavations by blasting. But it has to be emphasized that theseContour Blasting Technique for Surface Excavation
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Evaluating the Application of Rock Breakage without
In rock breakage and excavation applications, it is based on the principle of differential thermal expansion and induced stresses, similar to the fire setting technique used in the Bronze Age [10]. Lindroth et al. applied the technique of microwave heating to two igneous rock types andThe under-excavation technique (UET) is a unique in situ stress determination method which permits the stress state to be estimated on a rock mass scale. In method, stress predictions can be made several times, once for each increment of excavation face. It includes contributions from the variability of the pre-mining stress In situ stress determination using the under-excavation technique—I
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二氧化碳相变致裂技术研究进展与展望 USTB
2. Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430024, China. 3. Oulu Mining School, University of Oulu, Oulu 90014, Finland. More Information. 摘要. 摘要: 二氧化碳相变致裂作为一种环境友好的绿色破岩技术，具有破岩效率高、振动小、无污染等优点，近年来已成为岩石The prime objective of the method was not mining as, primarily, the technique was designed for maintaining the waterways navigable. Later, the technique found its application in mining, where it has become used for excavation diamond from the off-shore marine placer deposits, gold placers at the river beds and for mining the mineral Mining Methods SpringerLink
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