Project Overview: The document details the use of the Herrenknecht VSM9600 for shaft enlargement, specifically for ventilation shafts in existing tunnels. The VSM9600 is designed for hard rock formations and can operate at depths up to 160 meters.

Machine Specifications: The VSM9600 features a modular system allowing for shaft enlargements from 2.40m to 9.60m in diameter. It has a rated power of 400kW, a drive speed of 0-80rpm, and a maximum torque of 78kNm. The total weight of the machine is 120 tons.

Construction Method: The machine uses a telescopic boom with an integrated cutting drum, adaptable to various geological formations. The shaft lining is performed simultaneously with excavation using materials like steel anchors, steel mats, and shotcrete.

Performance and Features: The VSM9600 achieves an average excavation rate of 2 meters in 12 hours. It includes features such as strand jacks for lowering and lifting, a guidance system, and the ability to handle different shaft diameters with a single machine.

Geological Conditions: The machine is capable of working in fractured dolomite, limestone, and marly chalk, with compressive strengths up to 200MPa.

Contact Information: Herrenknecht AG, based in Schwanau, Germany, is a leader in mechanized tunneling technology. Contact details include phone, fax, and email for further inquiries.