ENGINEERING GEOLOGY ROCK PARAMETERS FOR CONTROLLED ROCK BLASTING ON THE HIGHWAY SPLIT-PLOČE
Defining geology engineering and hydrology parameters of the route is very important from the aspect of rock mass data collection and resulting blast design. Over the last decade there have been considerable advances in our ability to measure and analyze blasting performance. These can now be combined with the continuing growth in computing power to develop a more effective description of rock fragmentation for use by future blasting practitioners. Results of engineering-geological research are significant for the optimization of blasting parameters. These data are showing a real picture of rock mass, and they are as follows: statistics of density of discontinuities, determination of “GSI”, Hoek-Brown criteria for strength of rock mass and “in situ” determination of mechanical parameters, including geophysical survey data. Three factors control the fragment size distribution: the rock structure, the quantity of explosive and its distribution within the rock mass. Rock excavation by blasting for the highway is held in complex environment. Such conditions force restrictive criteria which than protect environment from seismic influence and mechanical damage.
Determination Rock Parameters for effective Blasting using GSI
Fragment size distribution is controled by rock structure, quantity of explosive and its distribution within the rock mass. Results of engineering-geological research are significant for the optimization of blasting parameters. These data are showing a real picture of rock mass: statistics of density of discontinuities and their orientation, determination of GSI, criteria for strength of rock mass and in situ determination of mechanical rock mass parameters. This paper presents one of posibbilities using GSI for improving efficiency of blasting and getting desired fragmentation.
The development of a liquid antihistaminic preparation with sustained release properties.
The relative capacity of several cation exchange resins to adsorb methapyrilene has been determined by an in vitro method. It was demonstrated that methapyrilene adsorbed on sulfonic acid cation exchange resin possessed pharmacological activity approximating that of a solution of methapyrilene hydrochloride as measured by the protection against histamine-induced asthma in the intact guinea pig. It is suggested that the use of ion exchange resins as carriers of drugs in liquid dosage forms may be useful in sustained release preparations.