Dynamic Bolts & Products - HEA Mesh
Where ground conditions are rock-burst prone and challenging, HEA mesh by DSI Underground provides improved surface containment with the addition of prelaced wire strand. In dynamic conditions where an excavation surface deforms, the strata loading is effectively transferred to all bolts and tendons, with a strong connection between the bolts and mesh offered by the HEA mesh installation.
HEA mesh has the ability to allow large deformations whilst maintaining a high load capacity. This “yield-ability” of HEA mesh to absorb energy in dynamic and repeated loadings can complement yielding reinforcement as an element in a complete dynamic system.
- Superior containment of rock bursts.
- Jumbo specific for rapid installation
- Reduced shotcrete requirement.
- Deformation plus strength for superior performance.
|Sheet Size*||2400mm x 3000mm|
|Aperture||100mm x 100mm|
|HEA Mesh Wire Diameter||5.6mm|
|Mass Per Sheet||45.5kg|
Deformation (typical maximum value at sheet centre):
Point loading (typical maximum value at sheet centre):
- 17.5 tonne
The pre-laced modular concept of HEA mesh is designed to meet the development intensive requirements of Jumbo based one pass mesh and bolt installations. This is achieved by the mesh behaving as standard mesh during handling and bolting.
The bolting pattern provides interconnection of the cable lacing system between successive HEA mesh modules. Correct overlay of HEA mesh sheets and bolt placement is critical to ensure cable lacing performs as a complete system during a ground movement event. HEA mesh effectively removes the “weak link” of support systems.
HEA mesh could provide a more cost effective solution to the high energy demands of rock burst containment.