In Situ Measurements of Rock Salt Permeability Changes Due to Nearby Excavation J. C. Stormont Repository Isolation Systems Division Sandia National Laboratories Albuquerque, NM 87185 C. L. Howard RE/SPEC, Inc. Carlsbad, NM 88220 J. J. K. Daemen Mackay School of Mines University of Nevada Reno, NV 89557 Abstract The SmallScale MineBy was an in .
Measurements of vertical stress at various mining and civil engineering sites around the world confirm that this relationship is valid although, as illustrated in Figure 1, there is a significant amount of ster in the measurements. v z. In situ and induced stresses 2 Figure 1: Vertical stress measurements from mining and civil engineering projects around the world. (After Brown and Hoek ...
Testing the in situ Bulk Density of Mining Waste Stored in Dumping Grounds Zenon Różański1*, Janusz Konior1, Leszek Balcarczyk2 1Silesian University of Technology, Faculty of Mining and Geology, Gliwice, Poland 2POI Format Sp. j., Gliwice, Poland Received: 24 October 2017 Accepted: 28 January 2018 Abstract More than 200 dumps serving the disposal of waste .
Safe design of underground excavations in mining requires good knowledge of the state of natural stresses in the rock mass. So far, the only way to determine those stresses with an acceptable degree of accuracy has been to carry out insitu measurements. Yet the stress measurement techniques commonly used in Quebec mines have significant limitations in terms of reliability and precision, which ...
Compared with traditional uranium mining methods, the insitu leaching uranium method is less harmful to environment, but the effect of insitu leaching on the atmosphere, soil, surface water, especially groundwater cannot be ignored. In this paper, on the basis of analyzing the pollution sources, measures to protect the environment are brought forward, which can help us to minimize the ...
In Situ Water Quality Monitoring SESDPROC111R4 Effective Date: March 14, 2018 . Page 5 of 9. 2 Methodology. General . With multiple probe options and customizable configuration, data sondes are extremely versatile tools for the measurement of .
· Then several in situ measurements of actual state of stress on various loion inside the Ravaccione and Fantiscritti quarries where carried out using CSIRO cells. This preliminary work lead to the geometric reconstruction of the rock mass, carried out using the computer code Resoblock ®. This phase allowed, once the current excavation geometry was given, to define the geometry of a ...
The Sigra insitu stress (IST) measurement technique is designed to provide the best possible combination of desirable features. In essence, the tool is similar to the United States Bureau of Mines borehole deformation gauge (Merrill, 1967) in that it is a biaxial deformation device used to measure the change in diameter of a pilot hole.
measure in situ stresses, it became clear that in many cases the horizontal stress actually exceeded the vertical, often by factors of three or more (Dahl and Parsons, 1972; Hoek and Brown, 1980). A number of theories were proposed to explain the presence of horizontal stress. Two of the earliest were the "Poisson's effect" and the "lithostatic stress state." Both of these .
Coal Classifiion Hydraulic conductivity Mining Water injection Measurement in situ Test method Permeability Slicing Borehole China Asia Keyword (es) Carbón Clasificación Conductividad hidráulica Explotación minera Inyección agua Medición en sitio Método ensayo Permeabilidad Chapeado Pozo sondeo China Asia Classifiion Pascal 001 Exact sciences and technology / 001D Applied sciences ...
· In situ ground stresses in the Abitibi Mining District. Canadian Mining and Metallurgical Bulletin, Vol. 89 (No. 996) (1996), pp. 6571. View Record in Scopus Google Scholar. Herget, 1973 . Herget G. Variation of rock stress with depth at a Canadian iron mine. International Journal of Rock Mechanics and Mining Sciences, Vol. 10 (1973), pp. 3751. Article Download PDF View Record in .
Insitu leaching (ISL), also called insitu recovery (ISR) or solution mining, is a mining process used to recover minerals such as copper and uranium through boreholes drilled into a deposit, in situ leach works by artificially dissolving minerals occurring naturally in a solid state. For recovery of material occurring naturally in solution, see: Brine mining.
In civil and mining engineering, in situ stresses are commonly measured using overcoring (OC) methods, as these can permit determination of the complete threedimensional stress state (, the ...
· In situ measurements were performed using the ReactRA™ Raman spectrometer manufactured by MettlerToledo, equipped with a 16 mm diameter immersion Hastelloy probe sealed with a sapphire window. The probe is connected to the spectrometer through fiber optics (200 μm) allowing a spectral resolution of 7 cm −1 .
The importance of in situ stress measurement for mining design has been recognized by many Chinese mining companies since the 1970s. The techniques used for the measurement are the borehole overcoring technique and the hydraulic fracturing technique. During the last six years, the authors have completed in situ stress measurements in five Chinese metal mines, .
measure the diameters across the pins and the orientation devices. The inner barrel is then dropped back into the rods and drill string pulled back so that the magnetometers may operate free from their influence on the magnetic field. After a set period the rods are lowered to bottom and coring commences over the tool. As the bit progresses past the sets of pins loed in the pilot hole a ...
Underground Mining Technology 2017, Sudbury, Canada 477 Reliable in situ rock stress measurement from the excavation surface T Siren Stress Measurement Company, Finland M Hakala Stress Measurement Company, Finland MA Perras Stress Measurement Company, Canada Abstract Measuring rock stress has always been a challenging task. Although .
· NIOSH Mining . Site Browser. Modify Selection. Research methods and measures: In situ rock strength measurement; View/Modify Selection. Research methods and measures: In situ rock strength measurement; Refine Your Search. Hazard prevention and control Hazards and exposures Mine loions, excavations, and structures ...
In Situ Stress Measurements at the Stillwater Mine, Nye, Montana Jeffrey Johnson and Thomas Brady Spokane Research Laboratory, National Institute for Occupational Safety and Health, Spokane, WA Mary MacLaughlin University of Montana at Butte, MT Radford Langston Stillwater Mining Co., Nye, MT Hendrik Kirsten Fontainebleau, South Africa ABSTRACT The .
SCT conducts overcore measurements and stress change monitoring for the mining, civil and nuclear industries. SCT uses the ANZI strain cell for these measurements because of the instrument's operational advantages and high density of strain measurements allow high confidence, threedimensional in situ stresses to be determined during exploration.
In situ mining (see mining solution page) can be more environmentally friendly than underground mining and is cheaper than many mining methods (UlmerScholle, 2008). However, in situ mining cannot be implemented in all cases as the ore needs to be beneath the water table (the level at which the ground is saturated with water) and it needs to be porous enough to let the leaching solution ...
In situ leaching or in situ recovery refers to the mining technique of injecting water underground to dissolve ore and bringing the uraniumimpregnated water to the surface for extraction. Petroleum production. In situ refers to recovery techniques which apply heat or solvents to heavy crude oil or bitumen reservoirs beneath the earth's crust.
Insitu electrochemical measurements of total concentration and speciation of heavy metals in acid mine drainage (AMD): assessment of the use of anodic stripping voltammetry. Jung HB(1), Yun ST, Kim SO, Jung MC, So CS, Koh YK. Author information: (1)Department of Earth and Environmental Sciences, Korea University, 136701, Seoul, Republic of Korea. We assessed the use of anodic stripping ...
In Situ Stresses Stress Measurement 2 of 64 Erik Eberhardt – UBC Geological Engineering EOSC 433 (2017) Why Study Stress? Stress is a concept which is fundamental to rock mechanics principles and appliions. There are three basic reasons to understand stress in the context of engineering rock mechanics: There is a preexisting stress state in the ground and we need to .
