00 Timing Optimization Tunnels Monaco

DNA-Blast Software - Timing optimization through numerical simulation

DNA-Blast Software ADVANCED BLASTING OPTIMIZATION SOFTWARE

Timing optimization through numerical simulation Two tunnels in downtown Monaco

By Dr Thierry BERNARD Thierry Bernard Technologie

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

The project

Consists in drilling two tunnels in downtown Monaco

Distances to closest building are very short (30 m)

Vibration limits are 7 mm/s

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Very sensitive environment

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Very sensitive environment

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Vibration monitoring Remote download and set up

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Vibration monitoring Remote download and set up

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

More than 100 holes

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Cut with big empty holed

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Standard design Electric detonator Sequential timer

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Vibration trace at 28 m PPV = 2.2 mm/s

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO Cut with big empty holed Electronic design

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Electronic design Electronic detonators

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

Vibration trace at 18 m

PPV = 1.8 mm/s

DNA-Blast Software - Timing optimization through numerical simulation

TUNNELS UNDER DOWNTOWN MONACO

• Electric sequential blasting

– Vibration level : 2.21 mm/s

– Distance to first seismograph : 28 m< 7mm/s

• Electronic blasting (optimized)

– Vibration level : 1.97 mm/s

– Distance to first seismograph : 18 m