ABSTRACT
A drilling jumbo is machine that has seen, along the last decades, some major evolutions as the introduction of accurate sensors in order to define the exact boom positioning, everything integrated with an automatic drilling PLC able to find and realize the exact holes, data recording and restitution, data analyser with even geological interpretation of the rock mass worked out, high frequency drifters and heavy duty undercarriage for a long life in the hard environment where frequently are used. The paper presents examples from relevant case histories: the tunnels to be constructed with partial sections in heavy congestioned urban areas as Metro Paris, drilling contemporary steel sub-horizontal umbrellas and radial bolts in faulty zone as in Brenner, installing long cable bolts or CT-Bolts automatically injected as in Sydney, drilling and splitting for launching shafts in granite as in Hong Kong.
