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STRESSES AND DEFORMABILITY OF ROCK MASS UPON OPEN PIT EXPLOITATION OF DIMENSION STONE

Siniša Dunda
Petar Hrženjak
Trpimir Kujundžić


Puni tekst: engleski pdf 481 Kb

verzije

str. 49-55

preuzimanja: 1.794

citiraj


Sažetak

The appearance of increased stresses and deformability of rock mass in the quarry of Zečevo (exploitation field of Selca – island of Brač) has caused a considerable decrease of usability of mineral raw materials, which put into question the survival of the pit. Therefore the research and measurements of the state of stresses and deformability of rock mass within the pit were carried out. Besides detailed laboratory testings (testings on small samples) performed were trial in-situ testings on large samples including the corresponding numerical analyses. The exploitation of dimension stone by sowing regularly shaped rectangular blocks has been proved to be appropriate for in-situ testing of bending strength. The paper presents the results of carried out laboratory testings, in-situ testings of bending strength including measuring of deformations after sowing cuts and numerical analyses by which the possible range of horizontal stresses was determined. Since for the case of massive rocks, for which the continuum concept is applied, there are no specifically defined methods of corrections, presented is a possible relation for correction of input size values based on the carried out laboratory and in-situ testings.

Ključne riječi

dimension stone; quarrying; stresses

Hrčak ID:

13388

URI

https://hrcak.srce.hr/13388

Datum izdavanja:

4.12.2003.

Podaci na drugim jezicima: hrvatski

Posjeta: 2.707 *