NMX Dynamic
NMX Dynamic is a high-performance dynamic rock bolt suitable for rock reinforcement in stress conditions.
The bolt has a thread that is thicker than the diameter of the rest of the bolt. This unique design means that the thread can never break, ensuring the stress-relieving function of the washer on the exterior of the rock mass.
The dynamic steel function sleeve, with a smooth surface that covers the rebar, is intended to prevent the rock bolt adhering to the grout in this area. This mechanism allows the steel in the rock bolt inside the area of the function sleeve to stretch naturally and freely.
Because of the stretching of the steel, the forces induced as a result of high rock tensions can be absorbed by the rock bolt and thereby have a relieving effect on the rock mass and minimise the consequences of rockbursts. The other parts of the exposed rebar ensure that there is complete anchoring.
NMX Dynamic is 20 mm with M24 thread in the basic version, and is also available in a 22 mm version with M27 thread with exceptional dynamic qualities.
NMX Dynamic at a glance:
- High shear strength.
- Thicker at the end and thus equipped with a stronger thread, M24.
The long and dynamic function sleeve of NMX Dynamic 2.0 enables energy-absorption near the rock face.
NMX Static is a proven solution that has been used in Sweden's underground mines for over 40 years.