DRILL STEEL RETRIEVAL SLING
PATENT No. 2021/05544
INSTALLATION
The securing of the retrieval sling must be done when drilling is completed but before any explosives are brought to the work face for charging.
Securing the retrieval sling to the stuck drill steel The retrieval sling is equipped with a securing mechanism on one end and a spliced soft eye on the other end. The end with the securing mechanism is secured to the stuck drill steel. Securing the retrieval sling to the hanging wall The retrieval sling is secured to a rope sling eyebolt (or similar attaching point) that is installed into the hanging or side wall. A Crosby shackle is laced through the loop of the retrieval sling and the loop of the sling eyebolt. Once completed the Crosby shackle bolt is installed to keep the sling and the rope sling intac Securing the retrieval sling to the hanging wall The retrieval sling is secured to a rope sling eyebolt (or similar attaching point) that is installed into the hanging or side wall. A Crosby shackle is laced through the loop of the retrieval sling and the loop of the sling eyebolt. Once completed the Crosby shackle bolt is installed to keep the sling and the rope sling intact.
Rope sling eyebolt Hanging wall Retrieval sling attached to the rope sling eyebolt with a shackle
Working face
Retrieval sling Stuck drill steel
Retrieval sling connected to the stuck drill steel
REMOVAL OF STUCK DRILL STEEL AFTER BLASTING HAS BEEN CONDUCTED
The “Drill Steel Retrieval Sling” is designed to prevent drill steel loss and associated damages, as mentioned before. The one end of the sling is attached to the stuck drill steel by means of a securing device and clamp assembly and the other end of the sling is secured to the hanging or side wall. Once blasting has been conducted, the retrieved drill steel will remain attached to the sling and can be safely removed before the commencement of the cleaning operation. The drill steel and drill steel retriever must be removed by removing the drill steel first from the drill steel retriever and then from the drill steel retriever from the hanging wall. The drill steel retriever and drill steel that was retrieved must be staged at a safe place for the drilling crew to be able to re-use it again.
SPECIFICATIONS AND DIMENSIONS
MASS NET WEIGHT (kg)
APPLICABLE DRILL STEEL DIAMETER (mm)
DESCRIPTION
PRODUCT CODE
7.3 7.5
22mm 25mm 32mm 38mm 32mm 38mm
Blast Sling X4m to suit 22mm Head Drill Rod Blast Sling X4m to suit 25mm Head Drill Rod Blast Sling X5.5m to suit 32mm Head Drill Rod Blast Sling X5.5m to suit 38mm Head Drill Rod
SLIB1560400-22HEX SLIB1560400-25HEX SLIB1560550-32HEX SLIB1560550-38HEX
9.95 10.5 10.9 11.2
Blast Sling X5.5m to suit R32 Drill Rod Blast Sling X5.5m to suit R38 Drill Rod
SLIB1560550SCREWR32 SLIB1560550SCREWR38
Eash blast sling consists of eye one end with a 3.25T G209 Crosby anchor shackle and a 22mm (195x50x31) hex fitting on the other end fitted with a G450 Crosby wire rope clip. SLIB1560550SCREWR32 & SLIB1560550SCREWR38 R38 consists of stud screw end fitting 190xR38Lx31.
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