Počet záznamů: 1
The Influence of In-Situ Rock Mass Stress Conditions on Deformation and Load of Gateroad Supports in Hard Coal Mine
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SYSNO ASEP 0475782 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název The Influence of In-Situ Rock Mass Stress Conditions on Deformation and Load of Gateroad Supports in Hard Coal Mine Tvůrce(i) Lubosika, Z. (PL)
Waclawik, Petr (UGN-S) RID
Horák, P. (CZ)
Wrana, A. (PL)Celkový počet autorů 4 Zdroj.dok. Procedia Engineering - ISRM European Rock Mechanics Symposium EUROCK 2017. - Amsterdam : Elsevier Ltd., 2017 / Koníček P. ; Souček K. ; Konečný P. - ISSN 1877-7058 Rozsah stran s. 975-983 Poč.str. 9 s. Forma vydání Online - E Akce ISRM European Rock Mechanics Symposium EUROCK 2017 Datum konání 20.06.2017 - 23.06.2017 Místo konání Ostrava Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova gateroad ; mining ; underground support ; measurements ; stress Vědní obor RIV DH - Báňský průmysl vč. těžby a zpracování uhlí Obor OECD Mining and mineral processing CEP LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy ED2.1.00/03.0082 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UGN-S - RVO:68145535 UT WOS 000416996000124 DOI 10.1016/j.proeng.2017.05.269 Anotace The stress-strain state of the rock mass in the neighbourhood of the mining galleries is absolutely critical considering their behaviour particularly load and deformation. The stress-strain state can be affected by numerous geological and mining factors i.e. depth, mechanical parameters of the rock mass, the presence of faults, previous mining operations in case of multiple seam extraction and by the influence of the current longwall mining process. Considering this fact the advanced measurement plan was developed. The measurements were conducted in one longwall maingate of the Czech coal mines. The holistic investigation program consisted identification of initial rock mass stress tensor and monitoring of its changing during the approach of the longwall face. Two CCBO (modified overcoring) probes were installed to obtain pre-mining full stress tensor and afterwards three CCBM probes were installed to continuous monitoring stress state in rock mass ahead of advancing longwall. The triple height telltales and endoscopic methods were applied to monitor the behaviour of rockmass in close proximity of the gateroad. Hydraulic dynamometers and strain gauged rockbolts were used to determine the support load. Also the gateroad deformation observations were performed. The results of aforementioned measurements allowed to determine the potential relation between stress-strain rock mass state and behaviour of the investigated gateroad in coarse of longwall face approaching. Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2018 Elektronická adresa http://www.sciencedirect.com/science/article/pii/S1877705817324098
Počet záznamů: 1