Research on hole inclination law during the drilling at Antarctic ice and rock interface and design of the control device

Abstract:

Cores from bedrock beneath the Antarctic ice sheet are important for studying the history of Antarctic glacier formation and global climate change. When drilling the inclined interface between ice and rock， it is very easy for hole inclination to occur， affecting the quality and even the success of bedrock coring. This paper analyses the force state of the drill bit during the drilling process at the ice and rock interface， and investigates the effects of factors such as formation inclination， drilling pressure， rotational speed， mechanical drilling speed and cutting work per unit volume on the force on the drill bit and hole inclination law. Finally， a vertical rock entry device was designed based on the principle of full-hole anti-slanting for the ice and rock interface.