Podrobnosti záznamu

Název
    Impact of destress blasting on stress field development ahead of a hardcoal longwall face
Autor
    Koníček, Petr
    Kukutsch, Radovan
    Mazaira, Alejandro
    Ptáček, Jiří
    Staš, Lubomír
    Waclawik, Petr
Konference
    EUROCK 2014 - Rock Engineering and Rock Mechanics: Structures in and on Rock Masses (26.05.2014-28.05.2014 : Vigo, Španělsko)
Jazyk
    anglicky
Typ dokumentu
    konferenční příspěvek (zahraniční konference)
Zdrojový dokument - monografie
    EUROCK 2014 - Rock Engineering and Rock Mechanics: Structures in and on Rock Masses. Proceedings of EUROCK 2014, ISRM European Regional Symposium
Strany
    S. 585-590
Poznámky
    Autoři celkem: 6
    Projekt: VG20102014034, GA MV3cav_un_auth*0273815
    Rozsah: 7 s. : C
Předmětová kategorie
    destress blasting
    hardcoal longwall
    mining
Klíčové slovo
    Ahead
    Blasting
    Destress
    Development
    Face
    Field
    Hardcoal
    Impact
    Longwall
    Stress
Abstrakt (anglicky)
   Stress concentration and rockburst risk in coal mine are associated with the occurrence of competent strata in overburdened coal seams. Benches of sandstone and conglomerate are difficult unbreakable and a high level of elastic energy is stored there. It can be released as a rockburst. Destress blasting is a rockburst protective measure in hardcoal longwall mining. For optimal use of this method it is useful to know the stress changes induced by blasting. This paper describes the results of a project's in situ stress and its changes measurement ahead of an advancing longwall face in rock mass affected by destress blasting. The project was carried out in a longwall panel with a high rockburst risk. The newly developed modified overcoring method of stress testing was used. Although the explored longwall is still in progress the first results of stress development in the overburden of a mined seam influenced by blasting are interpreted.
Přispěvatel
    AV ČR Brno, Ústav geoniky
Kód přispěvatele
    AV ČR, ÚG
Zdrojový formát
    U
Datum importu
    24. 10. 2014