Slipform blade and method for applying pre-compression strain to cast-in-place concrete on well walls

METHOD FOR CALCULATING DIAMETER OF ANNULAR NON-FULL FORMWORK SUPPORT FOR CIRCULAR SHAFT

Anti-seismic support method for mine shaft

Shuttering with supporting ring having expendable drawers

Underground support system and method

Center-pillared full-face shaft drilling machine

Method of moving a component or a material to and within a level of a shaft boring system

Free-wheeling-resistant rolls for mining roof support and the combination of a mining machine and such rolls