STRESSES AND DEFORMABILITY OF ROCK MASS UPON OPEN PIT EXPLOITATION OF DIMENSION STONE
Journal Title: UNKNOWN - Year 2002, Vol 15, Issue 1
Abstract
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.
Authors and Affiliations
Siniša Dunda Petar Hrženjak Trpimir Kujundžić
Keywords
Related Articles
- EP ID EP29937
- DOI -
- Views 152
- Downloads 2
NEKADAŠNJI RUDNIK ASFALTA "ŠKRIP" NA OTOKU BRAČU
Nema pouzdanih podataka kad se započelo s radom u rudniku pakline (asfalta) u Škripu. Pretposlavljamo da je to moglo biti sredinom XVIII stoljeća. Kasnije, oko 1780. poduzetnici dobivaju dozvolu za kopanje pakline i na o...
TYPES OF FI SCAL REGIME IN HYDROCARBON EXPLORATION AND PRODUCTION
The choice of the right fi scal regime represents the main object of the energy policy concerning hydrocarbon exploration and production for the state government. For the operator and service companies it represents the t...
DETERMINATION OF CRITICAL PARAMETERS ON TESTING METHODS OF ELECTRIC DETONATORS ACCORDING TO EUROPEAN STANDARDS
In the paper are presented results of testing electric detonators according to New European Standards. In order to establish real, marginal values, testing have been performed on suggested devices with extreme parameter...
UTJECAJ SEIZMIČKIH EFEKATA MINIRANJA NA OBLIŽNJE GRAĐEVINE (KOMPARATIVNA ANALIZA)
Prilikom masovnog miniranja u kamenolomu vapnenca »Špica« (Ljubeščica, Hrvatsko Zagorje) mjerene su brzine oscilacije tla na dva mjesta opažanja za više minskih polja. Izložena je komparativna analiza proračuna dozvoljen...
SOME ASPECTS OF THE COMPATIBILITY OF MINERAL MINING TECHNOLOGIES
Sometimes in mining it is necessary to combine different extracting technologies within one enterprise. So, in the paper the analysis of scientific and technical mining operations with combined technologies is carried ou...