Solutions for. Coal Mining. Expanding Horizons Underground
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1 Solutions for Coal Mining Expanding Horizons Underground
2 Copyright RAG Applications 1 Pre-injection 2 TSL (Sprayable Membranes) / Piccola 3 Wet Sprayed Concrete / Altera 4 Mine Backfill 5 Cavity Filling 6 Coal Face Stabilisation 7 Coal and Strata Consolidation 2
3 Copyright RAG Injection: Pre-injection for water stopping and ground consolidation. Post-injection for strata consolidation, cavity filling and water stopping. MEYCO offers a complete range of ground consolidation and water sealing products. Rock Bolting: Advanced Technology Our specially formulated additives and pre-bagged grouts offer practical solutions. Thin Spray-on Liners (TSL): Fast Acting Our unique sprayable membrane for surface protection. Backfill: Flow Optimization Customized solution for rheology control and binder optimization. Shaft and Roadway Concrete: Our advanced concrete technology provides endless options when it comes to placing concrete underground. Sprayed Concrete: Total System Approach MEYCO s unique range of dry and wet mix solutions gives you safety, flexibility and economy for this important support activity. Abrasion Resistant Lining: We provide effective abrasion resistant flooring and lining products for processing plants. Service-Technical Support and Training: We support all products with extensive on-site training and trouble shooting. We have a worldwide team of over 250 specialists, so help is only a call away. Products RHEOCEM Microfine Cements MEYCO MP Colloidal Silica MEYCO MP Polyurea Silicates MEYCO MP Polyurethanes MEYCO Minegrout with Corrosion Protection MEYCO Cablegrout Flowcable with Corrosion Protection MEYCO TSL 865 MEYCO TSL 855 MEYCO Minefill Solutions GLENIUM Hyperplasticizers RHEOBUILD Range of Plasticizers DELVO CRETE Stabilizer GLENIUM ACE for Self Compacting Concrete GLENIUM Hyperplasticisers MEYCO TCC 735 Concrete Improver MEYCO SA Alkali-Free Accelerators DELVO CRETE Stabilizer Hydration Control MEYCO FIB Steel & Structural Plastic Fibers Equipment One and two component PU injection pump Packers, lances etc. Grout pump MEYCO Piccola MEYCO Altera Pump MEYCO Piccola, MEYCO GM MEYCO Anvilmine / MASTERTOP 230 MEYCO Piccola, MEYCO GM MEYCO Altera MEYCO expertise is always available to you underground. Our highly trained and experienced team will be there whenever needed. 3
4 TSLs Thin Spray-on Liners Effective Surface Protection In coal mining, oxidation can affect weak strata, causing rock slabbing and side wall degradation. Effective surface support and the protection of rock and strata against weathering are critical to the safety, efficiency and longevity of any mining operation. MEYCO thin spray-on liners (TSLs) contain fast setting polymers offering progressively increasing tensile strength development. They provide an excellent bond to almost any substrate, including concrete and rock. In hard rock mining, MEYCO TSLs can be used for: Stabilization of rock through substrate sealing Preliminary slope protection Preliminary and temporary in-cycle support Protection against rock weathering Waterproofing Tensile and Bond Strength MEYCO TSLs are applied in a single 3-5 mm layer. They set to a tack-free surface within 5-10 minutes and gain tensile and bond strength over the subsequent hours, days and weeks. This provides supplementary surface support to strategic areas of the mine where people and critical infrastructure are often present, bringing important safety benefits. The characteristics of the system are that TSLs are not rigid but elastic. The elastic membrane can also assist in preventing the passage of radon and methane gas. 4
5 Sprayed Concrete Workers Safety Continuous Strength Development High Durability The demand for high quality, durable sprayed concrete that poses negligible health risks and fewer negative impacts to the environment is ever increasing. Worldwide, there has been an important shift from dry to wet mix applications in the underground coal mining industry. This change, together with the latest technology in equipment and alkali-free accelerators which provide low dust and rebound levels, has significantly improved the working environment and lowered health risks. In order to achieve early and long-term strength to meet the demands of the underground coal mining market, MEYCO offers the following key systems that allow durable sprayed concrete structures to be constructed successfully and safely: MEYCO SA range of alkali-free liquid accelerators, a family of products developed to suit your site conditions, offering compatibility with local cements and excellent long-term durability. At the same time these systems ensure rapid and safe progress through their high early strength and continuous strength development. This is a very important factor as high early strength can be overlooked in favour of long-term strength and durability. GLENIUM range of state-of-the-art superplasticizers, giving you a very low w/c ratio coupled with high and extended workability. DELVO CRETE hydration control admixtures, designed to prolong the workability of your concrete mix to allow flexible site logistics. A range of other additives such as silica fume, colloidal silica and steel and polypropylene fibers. MEYCO FIB 5
6 Pre-injection Higher Advance Rates and Improved Safety with Pre-injection Controlled Setting Ecologically Friendly Easy Application Water ingress during shaft sinking and development of main roadways usually escalates project and production costs and inevitably causes significant delays. To counteract these risks, pre-injection of the ground ahead of the advancing face using microcements and mineral based grouts is an economical approach. Rock or soil conditions causing stability problems for roadway excavation is another possible reason for pre-injection. Poor and unstable ground can be improved by filling irregularities with grout material of sufficient strength and adhesion. The RHEOCEM range of microcements represents a significant technological advancement in cementitious injection. Its unique feature is rapid and controlled setting, minimizing delays to the mining cycle of drill and blast. RHEOCEM includes microfine portland cements for rock, coal strata and soil injection as well as ground water sealing and ground stabilisation. Its small particle size and a specially adapted admixture system mean that it penetrates very well into tight joints, fissures and pore spaces to provide a watertight grouted rock or soil mass. A unique addition to the MEYCO injection family is colloidal silica, mineral based grout. Colloidal silica is stable and consists only of natural ingredients, making it non-hazardous and very ecologically friendly. Thanks to its very low viscosity, colloidal silica penetrates finer fissures than any cement based product and ensures unrivalled penetration and permanent stabilization of fine, silty sands. RHEOCEM and colloidal silica can be used with standard cement injection equipment, achieving initial and final setting faster than normal and microfine cements. Colloidal Silica, MEYCO MP 320 0,015 µm RHEOCEM µm RHEOCEM µm RHEOCEM µm Ordinary Portland Cement CEM I µm 6
7 Post-injection Higher Productivity and Safety with Post-injection In coal mining, many circumstances call for post-injection. The stabilization of rock and coal strata is a common and proven practice in mines around the world. MEYCO offers a complete range of products and technical support to suit any problem you may encounter. PUS improved performance and safety. MEYCO polyurea silicates represent the latest development in injection resins for coal and strata consolidation. The reduced reaction temperature combined with extremely quick hardening and bonding performance even in humid conditions has proven itself in many coal mines. Preventing Water Ingress Some features and benefits of MEYCO injection resins: Many of the products for preventing water ingress in underground structures can be adjusted on site using different accelerators to give varying set time performance properties to suit the specific conditions. The technical properties and health and safety aspects of all MEYCO polyurethanes and polyurea-silicate resins have been tested and certified by external bodies. MEYCO offers powerful polyurethane and polyurea silicate resins to reinforce coal and adjoining rock, which have been specially developed to cure water leaks, reinforce rock beds and fill cavities. Both products are also suitable for fastening injection anchors and for use as a sealant protecting against gas or water leaks, as well as a solution for discontinuities in concrete. 7
8 Headquarters BASF Construction Chemicals Europe AG MEYCO Global Underground Construction Vulkanstrasse Zurich, Switzerland Phone BASF Construction Chemicals Europe AG MEYCO Equipment Hegmattenstrasse Winterthur, Switzerland Phone USA Mexico UK-Ireland Germany Czech Republic Poland Russia Turkey Kazakhstan India South Africa China Asia Pacific New Zealand Australia +61 Adelaide (08) Brisbane (07) Canberra (02) Darwin (08) Kalgoorlie (0408) Mackay (0418) Melbourne (03) Newcastle (02) Perth (08) Sydney (02) Townsville (07) Brochures on our underground construction solutions are available at and for Mineral Processing: The information given in this BASF publication is based upon the present state of our scientific and practical knowledge. As the information herein is of a generic nature, no assumption can be made as to a product s suitability for a particular use or application and no guarantee or warranty as to it s accuracy, reliability or completeness either expressed or implied is given. MEYCO : 11/11/AB Crea
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