Document Type

Conference Paper

Publication Date


Publication Details

This conference paper was originally published as Campbell, R, Mould, R & MacGregor, S, Investigation Into the Extent and Mechanisms of Gloving and Un-mixed Resin in Fully Encapsulated Roof Bolts, in Aziz, N (ed), Coal 2004: Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2004, 203-214.


Effective strata control, utilising fully encapsulated roof bolts is dependent on the installed quality of the reinforcement elements. One mechanism by which roof bolts may become less than fully efficient is by glove fingering (gloving) and un-mixing of the resin. Following a routine installed bolt quality audit and some small roof failures containing gloved bolts, a work programme was initiated to determine the extent of the gloving and un-mixing problem and to develop an understanding of mechanisms involved. Results have shown that gloving and un-mixing is a systematic and widespread pheno mena, occurring across the range of resin and/or bolt manufacturers, and in a variety of roof types. Gloving was found in bolts installed using either hand held pneumatic or continuous miner mounted hydraulic bolting rigs, under run of mine (ROM) condition s by operators, and under controlled manufactures “best practice” conditions.

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