Mine and process plant development – walls, stockpile bins, access ramps to process plants, backfill and tipping structures, haul roads and accommodation facilities, railway line construction for bulk ore or coal delivery, there is a Stone Strong solution for any mining engineering requirement. Inherently rapid construction and the ability to support large mobile or fixed live loads puts the Stone Strong suite of retaining solutions well in front of the competition and delivers time and cost savings to a projects’ bottom line.
Walls can be developed in stages to allow for early project start with subsequent process plant expansion as ore reserves are developed and project cash flow is available for expansion. Stone Strong blocks are inherently recyclable – structures can be built to last for 5 to 10 years then taken down and reused elsewhere as development needs change or haul roads relocated to allow for pit expansion works or similar.
Whatever your mining or quarry plant requirements are, we can build it, cost effectively and ahead of time.
Wall + Structure Applications
Stone Strong blocks allow for both gravity and MSE retaining design applications including the ability for curved, straight, stepped and tiered walls. 45 and 90 degree corners as well as a range of end and stepped components allow for substantial construction versatility working in and around process plant equipment or similar.
Standard block design is based on NZS 3101:2006 and has a minimum design life of 100 years in a B2 exposure environment. Reinforcing design to AS 3600: 2001 is similar and blocks are fully compatible with the loadings in NZ/AS 1170:2005. Higher exposure categories or longer design life is readily available with minor changes to concrete mix or reinforcement design.
Gravity design is based around the core 24SF, 2.2 m2 face blocks with standard block widths of 1.1, 1.6 and 2.2metres. MSE design utilises the 1.1m wide block with minor design changes to accommodate a range of geosynthetic and steel reinforcement including grids, webs, strip and mesh products sourced from a range of global suppliers. Where practicable, MSE design is based around utilising available on site soils for wall backfill and reinforcement support, minimizing imported material costs.
Gravity and MSE walls can both be used on the same specific project – MSE walls accommodating higher retained heights or surcharge and structural loadings with gravity blocks used on lower height areas or in the top few metres of MSE walls where gravity walls are suitable for design loadings.
Substantial constructability and program timesavings are available with the large 24SF blocks compared with either small modular block walls or alternatively concrete panel and strip reinforcement systems. Blocks can be placed from behind using a 20ton excavator, require no specific propping or support and can be placed 2 to 3 blocks high in advance of backfill placement and compaction.
Structurally, the blocks readily accommodate construction plant surcharges such as excavators, compaction plant, piling rigs, cranes, bridge beam launch equipment and other large construction loads. 24SF1.6 and 24SF2.2 m blocks can accommodate up to 900mm diameter piles at nominal 1.23m centres installed down through the internal block voids.