Star Plates

for general use (may require spherical seat washer)    

 

  • special grade deep draw steel
  • 25 ton capacity
  • A = 6" diameter
  • B = only 3/16" thick
  • C = 1-1/2" diameter
  • weighs only 1.6 lbs (730 g)

Star Plate Specifications
The most important features of any roof plate are stiffness, yield strength and area of contact with the rock, especially under high loads.

To determine these parameters the DSI Research and Development team have developed a testing method which very closely simulates underground coal mining conditions.

Figure 1 illustrates the performance of the new STAR PLATE (and compares it with other common roof plates) for conditions commonly encountered in Australian underground coal mines. The STAR PLATE yield load is close to the yield strength of the most widely used AX type bolt.

Apart from the high strength of the STAR PLATE (despite its relatively thin plate thickness of 5mm) it has the additional advantage of providing a larger bearing area when heavily loaded as shown in Figure 2.

The STAR PLATE is a further example of DSI Research and Development Team?s world leading technology in Strata Reinforcement Products, that seeks safe, cost-effective solutions for the underground mining industry.

Figure 1: Typical Load vs. Displacement characteristics of STAR PLATE used with wire mesh compared with two conventional domed plates tested on a flat surface of medium strength bed of 25-30Mpa compressive strength:

* 150X150X8mm Domed Plate
Figure 2: Plates under heavy load.		* 150X150X10mm Domed Plate* 150X5mm Star Plate