Method and arrangement for controlling rock drilling

Details Method and arrangement for controlling rock drilling Method and arrangement for controlling rock drilling

E - Fixed Constructions

21

B

E21B 44/00 (2006.01) E21B 44/06 (2006.01)

Patent

CA 2258316

A method and an arrangement for controlling rock drilling on the basis of a pressure acting in a pressure conduit of a rotation motor of a drill rod. In the method, the pressure acting in the pressure fluid conduit of the rotation motor is measured during the rotation when the drill bit does not touch the rock to be drilled, and the control is carried out thereafter on the basis of the difference between the pressure value measured during the drilling and the idle pressure value. In the arrangement, the rock drilling machine comprises a control unit that measures the pressure acting in the pressure fluid conduit of the rotation motor when the drill rod is rotated so that it does not touch the rock to be drilled and stores it in the memory and controls the rock drilling machine during the drilling on the basis of the difference between the pressure value measured during the drilling and the idle pressure.

Procédé et dispositif servant à commander la perforation d'un rocher en fonction d'une pression s'exerçant dans un conduit de pression d'un moteur de rotation d'une tige de forage. Ce procédé consiste à mesurer la pression s'exerçant dans le conduit de liquide de pression du moteur de rotation pendant la rotation, quand le foret ne touche pas le rocher à perforer, puis à exécuter la commande en fonction de la différence entre la valeur de pression mesurée pendant le forage et la valeur de pression au repos. Dans ce dispositif, la perforatrice de rocher comprend une unité de commande qui mesure la pression s'exerçant dans le conduit de liquide de pression du moteur de rotation quand la tige de perforation est mise en rotation, de façon à ne pas entrer en contact avec le rocher à forer, mémorise ladite pression dans une mémoire et commande la perforatrice pendant le forage en fonction de la différence entre la valeur de pression mesurée pendant le forage et la pression au repos.

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