EPB (Earth Pressure Balance) and Pumped Muck Systems

Tremendous Benefits of EPB...

• Control and regulation of face pressure
• Control of face water
• Preventing over and under mining
• Small surface plant

But sometimes there are problems...

Tunnels have to be dug in ground where the EPB TBM needs a little help, such as:

• Alternating hard and soft ground
• Mixed face
• Wet running sand
• Fragile surface and underground assets
• Dry non-flowing sands and clays
• Gravels, pebbles, boulders
• All of the above

Morrison Mud have the solutions

Morrison Mud EPB foam and polymer spoil conditioning works by:

• Converting muck as it is mined into a good EPB or pumpable consistency
• Allowing mixed face (for example, wet running sand plus hard rock) to be mined efficiently
• Making a waterproofing plug in the screw
• Mining sticky clay with a rock head

Full respect for the environment

Morrison conditioning products are designed for minimal environmental impact.

Pumped muck

Some types of spoil are more pumpable than others. Morrison spoil conditioning allows you to pump spoil easily without excessive water addition. BLACKJACK Clay Foam is specially formulated and recommended for clay stickiness control in the face and plenum.

Foam generators - hire or buy

Morrison Mud offer complete spoil conditioning systems (EPB foam generator and polymer injection systems) to contractors and manufacturers, Contact us for hire and sale prices. Designed for all major additive types including Morrison, MBT and Condat foam.

EPB and Pumped Muck: quick reference

Click here for the Morrison quick reference guide.

It's all about muck...

Correct treatment converts self-levelling slurry from a wet sand/siltface into material that is optimised for handling and disposal/re-use. This picture shows material from a wet running sandy/silty face in Limerick, Ireland, optimized for EPB plug behaviour and ease of handling and disposal by correct application of conditioning agents. Tunnelling Contractor: J Murphy, London. Date: May 2002.