THE MAJOR COMPONENTS OF BOLTING SYSTEMS
Research focussed on mining operations in South Africa over the past decade has shown that most of the ground-fall that occurs in mining operations (particularly South African coal mines) occur as the result of an incorrectly supported roof. Naturally, this has put a focus on the improvement and development of steel roof bolts, a main supportive utility for roof mines, that have been in use and development in mines since the 1940’s.
The capacity and effectiveness of mining resin bolts differs depending on the nature of operations, the type of terrain you are mining in, the weight and size of machinery, and several other factors.
Ensuring that these 5 components are taken care of will help you maintain an adequate support system, and so they should be carefully inspected an accounted for:
RESIN
There are numerous factors that affect the support provided by mining resin bolts that directly impact the support quality in relation to resin.
Ensuring that you have a correct support structure for the resin you work with includes investigations into the resin types, how it affects set and spin times and roofbolter spinning speeds, as well as plastic encapsulation.
BOLTS & RELATED COMPONENTS
Similarly, bolts and components have a major impact on the support provided by roof bolts, which also need to be carefully and accurately accounted for.
These include the bolt profile, any impact that preload has on bolts and components, and how diameters and rib heights vary. In addition, the deformability of bolts has a large role to play.
THE BOLT HOLE
Several factors impact how the bolt hole will facilitate support, or fail to do so, and may also be related to the type of resin in the terrain.
These include how wet and dry drilling impacts the hole profile and system performance, the size of the ring between the hole and the bolt, as well as how drilling speed affects the hole profile.
MACHINERY & EQUIPMENT
Considering the variety of machine and equipment types used in mining operations, factoring in the effect this will have on your support structure is crucial.
Variables that impact this include machine torque and thrust, how different drill bits affect support structure, as well as machine free rotation, spinning, and drilling speeds.
ROCK TYPE
Understanding how the rocks you are working with interact with support components is also essential for selecting the correct mining roof bolts for the geological environment your mine operates in. Surveys may need to be conducted to get a better understanding of the terrain in this regard, but is a step that is essential to selecting the right support systems.
CONTACT REUNKO STEEL FOR DETAILS
If you would like to know more about sourcing high quality steel roof bolts for improved structural support and safety in South African mines, be sure to get in contact with a representative from Reunko Steel today, or feel free to browse our website for additional information on our company and its offers.