METHOD AND DEVICE
The present invention relates to a method for controlling a rock drilling process, in which an impulse-generating device comprising an impact element transmits a shock wave to a tool connected to the impulse-generating device, whereby a portion of the energy of the shock wave is transmitted to the rock by means of the tool and a portion of the energy of the shock wave is reflected and brought back to the impulse-generating device as reflected energy. The method comprises steps of generating at least one parameter valu e representing the reflected energy, and regulating the interaction of said impact element with said tool at least partially based on said value or valu es to control the rise time and/or length of said shock wave. The invention als o relates to a regulation device, an impulse-generating device and a drilling rigg.