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

Shuttering with supporting ring having expendable drawers

Shaft enlargement arrangement for a boring system

Formwork system

Center-pillared full-face shaft drilling machine

Retainment wall for underground mine and method of construction

Underground mining

Earth boring system

Full-face shaft boring machine, boring system, and boring method