Tunnel Boring Machine Calculation

$10-30 USD

Completed

Posted

over 9 years ago

$10-30 USD

Paid on delivery

Design Task The following data refers to a horizontal tunnel to be driven by a Tunnel Boring Machine (TBM). • Diameter of tunnel, i.e. size of TBM cutter head = 5.0 m • UCS (mean) of rock strata = 60 MPa • Shear strength (mean) of rock strata = 15 MPa The TBM has the following specifications: • Available axial thrust = 4.5 MN • Available torque = 880 kN.m • Rotational speed = 4.6 rpm • Muck clearing capacity = 0.26 m3 /rev • Disc cutter diameter = 260 mm • Disc spacing = 100 mm • Disc edge angle = 35º QUESTIONS Determine, making & justifying assumptions as required, the following: 1. the maximum axial boring rate in units of m/hr 2. the total axial thrust requirement for the machine to meet this task (MN) 3. the total torque required (kN.m) 4. the rotary cutter head power required (kW) 5. the specific energy of the operation (MJ/m3 ) Neglect any allowance for gauge cutters on the machine.

Civil Engineering

Mechanical Engineering

Mining Engineering

Project ID: 6886360

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Active 9 yrs ago

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