Desenvolvimento de tecnologia eletrohidráulica aplicada a desmonte de rochas em áreas urbanas.

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Author(s):	Carlos Magno Muniz e Silva Total Authors: 1
Document type:	Doctoral Thesis
Press:	São Paulo.
Institution:	Universidade de São Paulo (USP). Escola Politécnica (EP/BC)
Defense date:	2001-09-06
Examining board members:	Antonio Stellin Junior; Fernando Fujimura; Wildor Theodoro Hennies; Aarão de Andrade Lima; Valdir Costa e Silva
Advisor:	Antonio Stellin Junior
Abstract
Conventional rock blasting promotes many negative environmental impacts including ground vibration, flyrock, air blast, and the emission of noise, dust and gases. An unconventional alternative process is the application of eletrohydraulic principles. Electrohydraulic blasting is able to create a fracturing and rupture states in the rock, almost instantly. The energy is produced by a high current impulse generator, without the above environmental impacts caused by conventional explosives. It is particularly suited for application in urban areas mining. The research to joint theoretical analysis of fragmentations mechanism, considerations of the geomechanical criteria of rock failure, laboratory testing, and analysis of the electrical parameters of impulse generators related to rock fragmentation. The laboratory experiments included geomechanical and eletrohydraulic tests on limestone samples of up to 150 kg. The test results show satisfactory efficiency and energy losses of proposed model technological. (AU)