Skip to main content
Conference Proceedings

Underground Operators Conference Proceeding 2023

Conference Proceedings

Underground Operators Conference Proceeding 2023

PDF Subscribe Add to cart

Intersection reinforcement with self-drilling anchors for improved productivity at Kanmantoo

An improved ground support method for development intersections, wide spans and stope brows was implemented at Kanmantoo mine. The method uses a jumbo to simultaneously drill and install self-drilling anchors (SDAs) to depths from 4.5 m to 7.0 m. Resin is subsequently pumped into each SDA using a specially designed integrated tool carrier basket, with plating occurring within 10 mins due to rapid resin cure. This methodology means that SDAs can be installed rapidly due to reduced process steps and wait times with reduced hazards to personnel. Cablebolts are used extensively in underground mines to reinforce the ground in wide spans, such as at intersections and stope brows. The flexible cablebolt tendon allows for a long, continuous and high-capacity reinforcing element to be inserted into the rock. A common cablebolt installation practice at Australian underground mines that do not utilise a mechanised cable bolter, is for cablebolt holes to be drilled by a jumbo or longhole rig, hand installation and grouting by a service crew, then plate tensioning following a grout curing wait time of typically 12 to 24 hours. This process involves multiple separate labour-intensive work processes and results in reduced availability of priority headings. This paper discusses the development history of vertical SDA use in wide spans at Kanmantoo mine. The installation process is fully described, including aspects such as reliable in-hole coupling of SDAs, resin selection and pumping aspects. A cost benefit assessment, and a case for ground stability are presented to compare cablebolt use to SDAs in development intersections.
Return to parent product
  • Intersection reinforcement with self-drilling anchors for improved productivity at Kanmantoo
    PDF
    This product is exclusive to Digital library subscription
    Subscribe
  • Intersection reinforcement with self-drilling anchors for improved productivity at Kanmantoo
    PDF
    Normal price $22.00
    Member price from $0.00
    Add to cart

    Fees above are GST inclusive

PD Hours
Approved activity
  • Published: 2023
  • Pages: 11
  • PDF Size: 0.986 Mb.
  • Unique ID: P-03021-K2L5Q4

Our site uses cookies

We use these to improve your browser experience. By continuing to use the website you agree to the use of cookies.