DBPapers
DOI: 10.5593/sgem2017/13/S03.072

MONITORING SYSTEM OF ROCKBOLTING INTERACTION IN ROCK MASS CONDUCT UNDER SEISMIC ACTIVITY IN UNDEGROUND MINES

M. Madziarz
Monday 11 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-00-1 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 13, 562-570 pp, DOI: 10.5593/sgem2017/13/S03.072

ABSTRACT

In the paper underground monitoring measurement system for continuous measurement of load changes in instrumented rockbolts was presented. The use of anchor casings creates an effective method of protecting underground mine excavations in KGHM Polska Miedź S.A. mines. Foundation for technical assumptions of original monitoring method was trial measurement period carried out in two underground copper mines of KGHM Polska Miedź S.A. between 2005 and 2008. The main aim was to receive interaction between load variations measured in instrumented rockbolts in relation with seismic events in underground mining. Underground measurements were conducted using different types of rockbolts and specially developed prototype recording system. Method allowed continuous real-time measuring in relation with seismic tremors inducted by underground deposit extraction with room and pillar method. Given the past experience on the measurement of changes in load of anchors carried out in a continuous mode, work has been undertaken, the aim of which is to develop a new test method - using developed for this purpose, autonomous, adapted for installation in harsh mining conditions, modern device, enabling continuous monitoring of load changes of anchor housing, clear signaling of the emergence of emergencies or emergency and the possibility of recording and transmission, and thus the subsequent processing of the results of measurements. Testing of prototype devices has already been carried out in laboratory and underground conditions.

Keywords: rockbolting, monitoring system, underground mining, seismic activity