Normet has established a long term relationship with the underground mining industry over its more than 50 years of experience. Primarily an equipment manufacturer/supplier over its life, Normet has evolved substantially since 2007 to incorporate global Life Time Care (aftermarket support), Construction Chemicals and Rock Reinforcement business lines to its offering.
Normet’s Construction Chemicals offering addresses a number of critical aspects of underground mining including sprayed concrete, structural support liner (SSL), in-situ concrete placement, mine backfill, rock reinforcement, and injection for ground consolidation or water control.
In addition, our Rock Reinforcement Line features the D-Bolt, a safe, cost effective and efficient energy absorbing bolt available to underground mining.
All this technology, while available, delivers the greatest results when used in a knowledgeable, systematic and holistic manner to ensure that the needs of the customer’s processes are correctly met. Our offering is enhanced by the expertise of our trained professionals around the world. They speak your language, travel to your sites, and get underground to ensure that you get just what is required.
GROUND SUPPORT – SPRAYED CONCRETE
Sprayed concrete, or wet-mix shotcrete as it is commonly referred to in many parts of the mining world, has proven itself to be a ground control component of choice over the last 20 years. As a quantum evolution to the prior method of dry-mix shotcreting, sprayed concrete has proven its distinct advantages in logistics, application and performance and has become a first line choice of ground support for underground mines globally. Its ability to be quickly applied, its predictable and durable performance, and its complementary qualities to widely accepted reinforcement measures, make it a logical choice for ground support systems.
GROUND SUPPORT – STRUCTURAL SUPPORT LINER
A Structural Support Liner (SSL) can be used when no other means of support is available. SSLs can be applied rapidly and safely, supporting the rock mass in the early stages before it moves too far down the ground reaction curve. With the use of a resin injection system and associated bolting or a SSL system and bolting, we can provide a safe and efficient working environment with cost benefits.
ROCK REINFORCEMENT – INJECTION FOR GROUND CONSOLIDATION
Normet has developed a range of polyurethane grouts for ground consolidation, void filling and water ingress control within the underground mining environment. The Normet portfolio of polyurethane grout includes rigid, flexible, semi-flexible, water activated, temperature adjustable and low viscosity polyurethane grouts.
ROCK REINFORCEMENT – D-BOLT
Underground mining is moving deeper and the construction of tunnels and underground spaces are facing more challenging ground conditions. The risk of rock bursts and deformations are increasing, causing potentially unsafe conditions for people, equipment and the operation as a whole, requiring innovation in ground control management. Rock bursts and large rock deformations may even lead to closure of part or the entire mine or work site, consequently lowering revenues and impacting viability.
ROADWAY & CAST CONCRETE
Normet, having extensive trackless equipment knowledge, is now able to offer advice and admixtures to optimize underground travelways and concrete shaft linings. This hostile environment for rubber tyred vehicles offers significant challenges for the design and application of concrete travelling surfaces.
The control of water utilizing chemical resins and microfine cements has long been associated with the mining industry. Technology advances have seen materials being designed specifically with mining applications in mind, ranging from ultra-low viscosity acrylate based resins and colloidal silica to highly reactive, high foaming water cut off polyurethane systems to microfine and ultra fine cements.
There are many challenges associated with mine backfill, not the least of which is the necessity to fill production voids underground in order to safely sustain mining operations. Broken down further, the challenges include manufacture (often with a waste material), transportation, placement, in-situ performance and durability.