Ram accelerator enhanced drilling system

A system for drilling or tunneling includes an assembly for accelerating projectiles into a region of geological material. The interaction between the projectile and the geological material expands the borehole and forms debris. The size of the debris may be reduced by moving the debris to a crushing device. The reduced-sized debris is then moved toward the surface using fluid movement. A water jet or other type of device may be used to cut or deform the periphery of an area of geological material prior to accelerating the projectile to control the shape of the bore and the manner in which the geological material breaks to produce debris. 用于钻井或隧道挖掘的系统包括用于使射弹加速进入地质材料的区域的总成。所述射弹与所述地质材料之间的相互作用扩展钻孔并且形成碎屑。可通过将所述碎屑移动到压碎装置来减小所述碎屑的尺寸。然后使用流体移动使所述尺寸减小的碎屑朝向表面移动。在使所述射弹加速之前可使用喷水器或其他类型的装置来切削地质材料的区域的周边或使所述周边变形以控制所述钻孔的形状以及所述地质材料破裂产生碎屑的方式。