Scientific Mining Journal

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Volume 32
 Volume 32  No 34 pp. (SeptemberDecember 1993)
 Volume 32  No 2 pp. (June 1993)
 Volume 32  No 1 pp. (March 1993)

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Volume 1
 Volumes 157 (20181961)
Ã–ZET
Son yÄ±llarda geliÅŸtirilen sayÄ±sal modeUeme yÃ¶ntemleri arazi kontrolunda geniÅŸ uygulama alanÄ± bulmuÅŸtur. Bu yazÄ±da yapÄ±larÄ±n jeoteknik modellemesinde, gerilme ve stabilité analizlerinde en Ã§ok kullanÄ±lmÄ±ÅŸ olan sonlu elemanlar yÃ¶nteminin yanÄ±nda sonlu farklar, sÄ±nÄ±r elemanlan, ayn elemanlar ve melez yÃ¶ntemler de kÄ±saca tanÄ±tÄ±lmÄ±ÅŸ ve birbirleri ile karÅŸÃ¼aÅŸtÄ±nlmÄ±ÅŸtÄ±r. Aynca arazi kontrolunda kullanÄ±lan sayÄ±sal modeUeme metodolojisi irdelenmiÅŸ ve madencilik ile ilgili iki sayÄ±sal model uygulamasÄ± tanÄ±tÄ±lmÄ±ÅŸtÄ±r. SonuÃ§ olarak arazi kontrolunda kullanÄ±lan sayÄ±sal modelleme yÃ¶ntemleri ve kullanrmlan hakkÄ±nda pratik bazÄ± Ã¶neriler sunulmuÅŸtur.
ABSTRACT
The numerical methods developed in recent years have been extensively applied in ground control. In this paper, besides the finite element method which was employed widely in modelling structures geotechnically for stress and stability analysis, finite difference, boundary element, distinct element and hybrid methods are described and compared. In addition, the numerical modelling methodology prevailing in ground control is discussed and two numerical models related to mining are reported. Finally, some practical implications during the application of the numerical methods are presented.
Ã–ZET
Kriging metoduyla yapÄ±lan kÃ¶mÃ¼r kalÄ±nlÄ±k ve rezerv tahmmlerinin doÄŸruluÄŸu, kullanÄ±lan numune sayÄ±sÄ±na ve variogram modelinin parametrelerine baÄŸlÄ±dÄ±r. BazÄ± durumlarda variogram modelinin sili ve kÃ¼lÃ§e etkisi deÄŸerleri kolaylÄ±kla bulunurken etki mesafesini bulmak zor olabilir. Bu Ã§alÄ±ÅŸmada, kÃ¼resel tip variogram modellinin parametrelerinden birisi olan etki mesafesinin kÃ¶mÃ¼r kalÄ±nlÄ±k ve rezerv tahminlerine etkisi araÅŸtÄ±rÄ±lmÄ±ÅŸtÄ±r.
ABSTRACT
The accuracy of the estimation of coal thickness and reserve by kriging method depends on the number of samples used and the parameters of the variogram. In some cases, it is relatively easy to estimate the sill and nugget effect on the underlying variogram whereas the estimation of the range may not be easy. In this study, the effect of the range which is one of the parameters of the spherical type variogram model on the estimation of coal thickness and reserve was determined.
Ã–ZET
Blok mermer Ã¼retiminde elmaslÄ± tel kesme yÃ¶ntemi ele alÄ±nmÄ±ÅŸtÄ±r. Bu yÃ¶ntemin uygulanabileceÄŸi ocak tipleri verilmiÅŸ, ocaÄŸÄ±n kesime hazÄ±rlanmasÄ±, deliklerin delinmesi, telin yerleÅŸtirilmesi ve kesimin yapÄ±lmasÄ±nda dikkat edilecek konular sunulmuÅŸtur.
ABSTRACT
Wiresaw cutting in marble quarries is presented. After giving the types of quarries amenable to wiresaw cutting, details of preparation of the quarry, drilling, placement of the wiresaw in the cutting holes and cutting operation are presented.
ParÄ±ltÄ±sÄ± ve gÃ¶zalÄ±cÄ±lÄ±ÄŸÄ± yanÄ±sÄ±ra havadan hiÃ§bir ÅŸekilde etkilenmemesi nedeniyle ilk Ã§aÄŸlardan bu yana insanlarÄ±n bÃ¼yÃ¼k ilgisini Ã§eken altÄ±n ilk uygarlÄ±klarÄ±n gÃ¼Ã§ ve ÅŸaÅŸaalÄ± yaÅŸantÄ±larÄ±nÄ±n dayandÄ±ÄŸ Ä± tek made n olmuÅŸtur. BaÅŸlangÄ±Ã§ta kolaylÄ±kla belirlenerek iÅŸletilmiÅŸ olan zengin altÄ±n damarlanna artÄ±k pek rastlanÄ±lmÄ±yor olmasÄ± yeni arama ve iÅŸletme tekniklerinin geliÅŸtirilmesine neden olmuÅŸ, tÃ¼ketilmiÅŸ olan kaynaklarÄ±n yerine yenilerinin konulmasÄ±nÄ± zorunlu kÄ±lmÄ±ÅŸtÄ±r.