Hydraulic Borehole Stress Cell

Description

The Model 3000 Hydraulic Borehole Stress Cell is a soft inclusion type cell consisting of an inflatable flat jack with or without platens. The cell is placed in a 50mm diameter borehole and then pressurised. Stress change is monitored with either a Bourdon tube gauge or any suitable diaphragm type pressure transducer (see Model 1200 for details) or both.

Application

For stress change monitoring in:

• Underground mines
• Tunnels
• Support pillars
• Deep excavations
• Shafts
• Applications where electronic devices can not be used (if not filled with electronic diaphragm pressure transducer)

Features

• Manual visual reading
• Simplified installation
• Corrosion resistant
• Waterproof
• Long-term stability
• Suitable for remote readout
• Rugged construction
• Not affected by long cable lengths
• Able to be connected to datalogging systems
• User specified diaphragm pressure transducer

Specifications for the Model 3000 Hydraulic Borehole Stress Cell

• Pressure ranges (MPa): 10, 16, 25, 40, 60
• Accuracy: ± 0.5 % full scale
• Borehole diameter: 51 mm
• Maximum borehole Length: 20 metres
• Measurement options: Bourdon pressure gauge and/or diaphragm pressure transducer
• Dimension: 51 mm x 250 mm long
• Weight: 3.5 kg