Abstract: An anchor device for securing a rock bolt in a borehole of predetermined diameter includes an elongated plastic cartridge having a first insertable end and a second end, a side wall extending between the ends, and stiffening ribs integrally formed in the sidewall for stiffening the cartridge to permit insertion thereof into the borehole.

Abstract: A gas-liquid-solids separation system for use with a drilling device includes a surge tank for holding drilling efflux comprising gas, liquid and solids, and adapted for mounting on a drilling device in a position for having a drill shaft extending therethrough. A stuffing box attached to a back side of the surge tank means and configured for enabling passage of the drill shaft therethrough prevents the drilling efflux from escaping the surge tank. A flange attached to the front side of the surge tank and aligned with the stuffing box for allowing passage of the drill shaft therethrough provides a seal between the surge tank and a borehole casing to enable the drilling efflux to flow into the surge tank means. An agitator disposed within the surge tank maintains suspension of the solids within the liquid, and a gas cyclone in fluid communication with the surge tank withdraws gas from the surge tank and separates any entrained liquid therefrom.

Abstract: A self-aligning stuffing box for use with a drilling device having a rotatable drill shaft includes a packing gland having an opening therethrough sized for passage of the rotatable drill shaft and includes packing rings for forming a seal between the packing gland and the drill shaft. A generally spherical exterior surface on the packing gland is supported by an interior spherical surface of a socket in a ball-and-socket like manner to enable the packing gland, packing rings and the rotatable drill shaft to pivot about the longitudinal axis of the rotatable drill shaft together. A frame slidably supports the socket and enables the socket, packing gland and packing ring means and rotatable drill shaft to be laterally displaced, with respect to the longitudinal axis of the drill shaft, as a single unit, in order to prevent damage to the packing rings by vibrational movement of the drill shaft during drilling.

Abstract: A hydraulic impactor having a reciprocating piston, a liquid coupling having a stepped bore and an actuatable driven member of a configuration to obtain the optimum energy transfer to the driven member.

Abstract: An improved hydraulic jet impingement cutting apparatus and method for cutting kerfs in rock or other hard formations by provision of divergent hydraulic jets in a cutter implement which cut clearance for passage of the implement into the kerf being cut.