breakage for possible space mining applications H. Satish1, J. Ouellet2, V. Raghavan3 and P. Radziszewski*4 An optimal combination of mechanical means and microwave energy to break rock material could
The failures due to inadequate management cannot be neglected as well. These dams are constructed mostly in a step-by-step construction method that leads to a continuously changing state of vertical loads during construction and may lead to …
In the present paper, application of low power microwave pulses was used to induce thermal cracks in rock samples, before use of mechanical breakage methods. The present investigation is conducted with the scope of possible space bound and terrestrial applications.
The method of drilling and blasting with explosives is widely used in rock fragmentation applications in underground construction projects, such as tunnels and caverns. However, the use of explosives is associated with rigorous safety and environmental constraints, since blasting creates toxic fumes, ground vibrations, and dust. Because of these constraints, there has been …
and promising EFRB methods for open pit and underground mining applications. The main EFRB technologies include mechanical cutting, microwave, laser, fluid, thermal and electrical applications. Finally, the application of microwave irradiation of rocks has been conducted successfully in the laboratory as a high potential concept. The approach
Breakage of such material is undesired in some applications, like in potato chip seasoning, as shown in the video below. On the other hand, breakage is desired in other operations in order to reduce the particle size, such as in wood chip material handling for …
241 The Influence of Coal Physical and Mechanical Properties and Mining Energy Consumption Factor on Airborne Respirable Dust Level Antoni Koziel, 1 Malgorzata Malec, 1 and Ewa Wardas2 1KOMAG, Mining Mechanization Centre, 44-101 Gliwice, Poland; 2Rybnicka Coal Joint Stock Co., 44-253 Rybnik, Poland ABSTRACT
chanical breakage, such as ripping or continuous mining, is in- This section is meant to be an introduction and adjunct to subse- cluded in the chapter on "Rock Breakage: Mechanical;" blasting quent sections that describe specific mining …
1. 1. ABSTRA CT. This report entails information on Mechanical Rock Breakage machines, their applications and. merits and limitations. This report also illustrates the integration of supporting ...
Advancement of projects in mining and civil applications is strongly dependent on rock breakage efficiency. Early on, humans understood that heating rocks and quenching it with cold water could reduce the rock Later, he discovered that 88 chemical energy derived from detonating various mixtures such as black powder, dynamite or bulk explosives ...
The mining industry now operates mines with depths exceeding 4 km, and deep mining of non-ferrous metals at depths greater than a thousand meters is often in hard rock mines. 19, 20 Operation of these mines must address two major challenges: (a) crushing of hard rock; and (b) control of mining-induced catastrophic rock instabilities, such as ...
A reduction in mechanical strength of rocks as a result of microwave irradiation could improve the performance of rock excavation equipment such as a tunnel boring machine. This will be increasing the rate of penetration and reducing operation time. Keywords: Mining, Rock breakage, Fragmentation, Explosive-free, Excavation
Experimental and Numerical Study of Rock breakage by2.22 Мб. Extending the use of high-pressure water jets to breaking hard rock in surface and underground mining applications still requires significant improvements in jet cutting or jet breakage performance.This is a key factor that has limited the wider uptake of pulsed jets as a rock-breakage method.
3. Physical Simulation Experiments of Mining an Ultrathick Coal Seam. To understand the basic features of OS movement in the mining process of UTCS and to determine the general rules of breakage of OS, physical simulation experiments were conducted on SM of the B M coal seam. As a widely used and effective means to study OS movement, the physical simulation …
1. Introduction. Rock fracture and deformation under indentation loading is key knowledge for underground engineering and resource extraction. Mechanical excavations of rock utilise concentrated loads to cause crack and fragmentation in rock mass, which are extensively used in mining excavation, oil and gas drilling, geothermal and other energy and resources …
The research demonstrates the mechanical cutting of PMS sulphide deposits in the Manus Basin and confirms the viability of mechanical excavation as a mining strategy. As well, knowledge was gained in the performance of an undersea excavator and potential design objectives for a future generation mining ocean machine.
The success of breakage mechanics models in various applications,,, proved the validity and practical usefulness of this assumption. (D) Through statistical homogenization, the macroscopic specific elastic strain energy is the average of such energies in the various size fractions, and can be determined from the current GSD, F ( D, B ).
EXPLORING MICROWAVE ASSISTED ROCK BREAKAGE FOR POSSIBLE SPACE MINING APPLICATIONS By ... 2005 Department of Mechanical Engineering McGill University Montreal, Quebec, Canada A thesis submitted to McGill University in partial fulfillment of the requirements for the degree of ... nu a été notée lorsque la durée d'application des micro …
In the mining business the usage of software's in modeling components and machines 3D and afterwards simulated by FEM has increased potentially within the last decades. Machines like, Car Dumpers ( Figure 1), Apron Feeders ( Figure 2) and Stackers-Reclaimers ( Figure 3) and their main components are modeled 3D and simulated by FEM software's.
UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol. II - Surface Mining Methods and Equipment - J. Yamatomi and S. Okubo ©Encyclopedia of Life Support Systems (EOLSS) SURFACE MINING METHODS AND EQUIPMENT J. Yamatomi and S. Okubo University of Tokyo, Japan Keywords: Mining method, surface mining, open pit mining, open …
mine clearance. A study intended to cover the main aspects of mechanical demining was commissioned in December 2001. The GICHD Mechanical Application in Mine Clearance Study is to be published during the last quarter of 2003. Published in the Proceedings of EUDEM2-SCOT - 2003, volume 1, 335 - 341
Blasting in mining is a chemical and physical process that occurs through the firing of explosives. It breaks mineral-bearing materials. These materials can be coal, ore and mineral stone. Blasting fragments materials, splits off rock blocks, and demolishes existing structures. The process of blasting goes through blast design prior any ...
Proceedings of the Geo-Shanghai 2014 International Conference, held in Shanghai, China, May 26-28, 2014. GSP 237 contains 24 technical papers which cover recent advances in rock mechanics and its applications. The extended abstract of an invited keynote presentation which served as the 2014 Jun Sun Lecture is also included in this publication.
Because top coal is not stable, a roadway with thick top coal often appears to mine pressure problems, such as bolt failure, cable breakage, and roof caving. In particular, these problems are more serious in rockburst mines. Based on a cable breakage case of No. 3 roadway in Xingcun coal mine, the paper analyzed the stress and elastic energy evolution law of …