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RST expands dust control technology to tunnels and underground mines

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Global Mining Review,

Reynolds Soil Technologies (RST) has expanded its range of services to specialise in comprehensive dust control solutions for underground mining and tunnelling.

In response to industry demand for preventative measures to suppress dust emissions from underground mining and tunnelling activities, RST has developed advanced methods for sealing loose dust to walls and roofs as well as roads and hardstand areas for longer periods of time, reducing the need for ongoing watering programmes.

By targeting specific areas and activity with customised products and applications, RST assists operators of underground mines and tunnelling activities to successfully manage their dust emission challenges while delivering significant operational benefits, personnel protection and regulatory compliance.

“Tunnels and underground mines require a broad range of targeted control methods to adequately control the hazard of dust emissions,” said RST Operations and Technical Director, David Handel.

“Dust emissions from underground mining and tunnelling activities move around the tunnel systems by ventilation and machinery air displacement with unsafe levels of build-up occurring on walls and roofs.

“Without targeted treatment, ongoing air displacement causes the dust to become dislodged and become airborne again.

“As part of our overall strategy to mitigate dust, each surface is targeted separately with specific dust suppression strategies to minimise the circulation of dust.

“Our dust suppression methods are customised with specialised chemistry based on determining factors such as material type, water quality, application procedures, duration and durability.”

Handel said spraying tunnel walls and roofs with water was inefficient as the water saturated the roads and dried very fast on the walls and roof surfaces with the rising of hot air, which quickly returned the surfaces to their natural state.

He recommends adding an advanced crusting agent to the water for spraying onto the walls and roofs to seal and bind loose dust to the rock surface, which remains active for much longer periods of time and reduces the need for ongoing watering programmes.

RST’s recommended product for this treatment is the company’s Guardian Dust Binder due its versatility, cost effectiveness and long-term dust mitigation results.

The team identified its products; RT20 Dynamic Stabiliser, Shield All Weather Road, Guardian Road Binder and Zero Waterless Dust Suppressant for the treatment of roads and hardstand surfaces in underground mines and tunnels, with treatments tailored and applied in conjunction or separately.

RST also strongly recommends using a foaming dust suppressant for materials handling, which is far more effective than plain water as the foam expands water and binds dust particles for greater lengths of time so significantly less water is required to achieve the highest levels of dust control efficiency.

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