Megabolt Australia (MBA) is proudly an Australian company and the market leader in the design, manufacture and practical appl ... ication of high capacity, strata support products for the underground coal mining and civil tunneling industries. Our products and expertise have been utilized in many major civil tunneling projects. MBA products can be used in primary and or secondary support applications and are systematically designed into support plans and installed in most longwall mines in NSW and QLD. read more