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Journal of Mining Sciences

2016 year, number 6

Identification of Load to Dog Heading Support during a Rockburst

A. NIEROBISZ
Central Mining Institute, pl. GwarkГіw 1, 40-166 Katowice, Poland
Keywords: горная промышленность, крепи выработок, горный удар, экспериментальные результаты, mining industry, heading support, rockbolt support, rockburst, test results

Abstract

This paper presents the methods and test results of the dynamic resistance of chock and rockbolt support used in Poland. By the dynamic resistance of the support is meant the ability to absorb and suppress the fast changing with time load with the value frequently exceeding the working support capacity of the supports. This feature is required when using the support in excavations endangered by rock mass tremors, especially such tremors, which can result in rockbursts. Based on the carried out studies and analyses, numerical values of loads are given that cause the slide of a friction prop, bending the support sections, loss of stability of dog heading support and load-carrying ability of bolts.