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A. M. Pucho, "The seismic action of large-scale blasts on mine workings," Gornyi Zh., No. 11 (1956). L. V. Safonov, "Methods of reducing the seismic action of blasts on mine working", in: Investigations on the Geology, Mining, and Beneficiation of Ores from the Kursk Magnetic Anomaly [in Russian], Gosgortekhizdat, Moscow (1962).
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1. Introduction. Buildings vulnerability assessment using fragility or vulnerability curves is an essential subject in surveying post-earthquake damage data [[1], [2], [3]].The difference between the fragility curve and vulnerability curve is that the former expresses the probability of exceeding a given damage state (DS) as a function of a …
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We investigate the influence of the mining stope (underground excavation or void) on seismic inversions for the scalar moment, corner frequency, source radius, stress drop …
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have first defined the basis of a PBSD for mining buildings and then adopted for assessing the performance of an existing screen building located in a high seismic area in northern Chile. The seismic demand was defined in terms of the Chilean seismic design code for industrial buildings, NCh2369 Of. 2003 [9]. The material and
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1. Introduction. In intact rock mass, the rock strata remain in natural stable mechanical equilibrium conditions [ 1, 2, 3 ]. Underground mining operations will disturb …
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Buildings is an international peer-reviewed open access monthly journal published by MDPI. Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge …
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stock and provide spare parts close to the mining operation. Good geotechnical information is essential to crushing plant siting and design. Installing a primary crushing plant on solid rock reduces the cost of concrete and structural steel. Life of Mine/Expansion Plans The life of the mine is a key element in the design of any crushing plant.
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This paper presents a numerical investigation on the influence of the mining environment on seismic sources, with a focus on pillar failure mechanisms in tabular mining. We investigate the influence of the mining stope (underground excavation or void) on seismic inversions for the scalar moment, corner frequency, source radius, stress …
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This paper presents a numerical investigation on the influence of the mining environment on seismic sources, with a focus on pillar failure mechanisms in tabular mining. ... The crushing source was implemented in the models at the centre pillar location as a stress drop of 10 MPa normal to the stope plane.
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A normal composite wall panel is a structural component composed of polystyrene insulation boards and concrete surface layers reinforced with steel wire mesh. It can be entirely prefabricated in a factory or constructed with the concrete surface layers cast on-site. A novel prefabricated monolithic concrete–polystyrene panel composite …
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Abstract. The Kaapvaal Craton in South Africa hosts one of the largest gold placer deposits in the world. Mining in the Witwatersrand Basin here has been the …
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Abstract The article presents a description and the first results of an experiment on deformation-seismic monitoring of the technical condition of a residential building located in a subsidence zone above mine workings. Deformation processes are monitored by hydrostatic leveling. Dynamic monitoring is implemented by controlling the …
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Coal mining in thick-hard roof areas leads to frequent high-energy seismicity and may even induce coal–rock dynamic disasters such as rockburst. It is important to explore the focal mechanism of mining-induced seismicity to understand the failure behaviour of the coal–rock mass and the characteristics of the stress field. It is …
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We investigate the influence of the mining stope (underground excavation or void) on seismic inversions for the scalar moment, corner frequency, source radius, …
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The second is "unstable crushing" failure in the rockmass surrounding a mining void. The low-frequency radiation of these so-called crush-type sources, which …
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Coarse crushing includes crushing operations discharging at sizes 4- to 6-in. or coarser; intermediate crushing comprises operations taking feeds 6- or 8-in. maximum and making products down to -1/2″ or 3/8″. Fine crushing is reduction by crushing to 1/4″ or finer; the distinctions are not sharp.
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We present a new approach of extracting mining induced micro-seismic events from a numerical model by converting simulated plastic strain to seismic …
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This paper presents important aspects of the design of a typical mining facility building using a performance-based seismic procedure. The structural system consists of heavy …
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Highlights Energy budget for grain crushing at seismic slip rates was determined experimentally. Energy used in the grain crushing was directly measured by BET surface area of gouge. Grain crushing absorbed only 0.02∼0.22% of frictional work. Surface area of gouge decreases at large displacements due to sintering of gouge. Thus …
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Comminution, an energy-intensive process, usually begins with blasting of rock in the mining operation followed by crushing in large, heavy machines, often used in stages and in combination with screens to minimize production of particles too fine for subsequent treatment (Sidebar 3-3). Grinding is usually done in tumbling mills, wet or dry ...
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Mining-induced seismicity has been reported almost in every mining country. Large seismic events with high-energy (HE) radiation can pose a serious threat to safe mining operations, which are the direct cause for rockbursts in underground mines. Over the last 30 years, statistical techniques to parameterise seismic data and predict …
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Most mining-induced seismic activities happen at coalmines in China. The average mining depth in 1980 was about 288 m in coalmines. In 2000, it had increased to 500 m, an increase of 212 m in 20 years. Therefore, recent increase of mine seismicity is largely attributed to the increase of mining depth. By 2003, 83% and 76% of coals had …
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Abstract. Seismic While Drilling (SWD) is a well seismic method developed in recent years which is based on reverse vertical seismic logging. It is a newly-developed well seismic technology which combines the seismic exploration technology with petroleum drilling engineering technology. Compared to conventional VSP, SWD has its …
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ABSTRACT With the increasing mining depth of coal mines, geologic hazards have become the main source of accidents. For this reason, coal seam prediction requires more assessment parameters, such as the degree of anisotropy, value, and elastic modulus. These parameters are difficult to determine using only the PP-wave. We have inverted …
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SEISMIC events in deep underground mining were a fact of life, said Reuters citing the comments of Neal Froneman, CEO of Sibanye-Stillwater.Froneman was speaking in a presentation to investors on June 7. At Sibanye's Driefontein and Kloof operations west of Johannesburg, from 2013 to the middle of May 2018, there were an …
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In Fig. 2 the distribution of the seismic events recorded on the PLA and IMI stations and magnitude versus distance from the epicenter are presented for the seismic dataset used in this paper.. Download : Download high-res image (213KB) Download : Download full-size image Fig. 2. Plot of magnitudes versus epicentral distances of the …
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At the same time, the large chamber blasting started to be adopted in the capital construction of mine in China, with a blasting charge of 10,000 tons at one time. In 1956, 9314.7 tons of explosives were used in one production blasting at Baiyinchang Open-pit Copper Mine in Gansu, which was the largest blasting in the mining industry at that …
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A major challenge in deep and high stress mining is managing seismic risk associated with blasting of production stopes and drift development to access the ore zones. The location, magnitude, and frequency of occurrence of seismic events are influenced by changes in stress, lithology, structure, and mining sequence rock …
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Mine seismic events are an inevitable dynamic phenomenon occurring in deep mines. A scientific and rational method is needed to evaluate and understand mine seismicity and its induced disasters. In the Ordos mining area of North China, multiple groups of thick hard-bedded sandstone formations commonly exist in the overlying …
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