Podrobnosti záznamu

    Long-hole destress blasting for rockburst control during deep underground coal mining
    Koníček, Petr
    Singh, R.
    Souček, Kamil
    Staš, Lubomír
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    International Journal of Rock Mechanics and Mining Sciences
    -, č. 61
    s. 141-153
    Autoři celkem: 4
    Projekt: ED2.1.00/03.0082, GA MŠk3cav_un_auth*0280791
    Rozsah: 13 s. : E
Předmětová kategorie
    destress blasting
    longwall mining
    Ostrava - Karvina Coal basin
Klíčové slovo
Abstrakt (anglicky)
   The Lazy Colliery in the Ostrava-Karvina Coalfield of the Upper Silesian Coal Basin adopted modern longwall technology for an underground extraction of coal seam No. 504. This coal seam is located at a cover depth of around 700 m. The seam thickness varied from 3.1 m to 5.0 m in the selected longwall panel. Two overlying coal seams, Nos. 512 and 530 experienced mining at average heights of 58 m and 75 m, respectively, from the planned working horizon of the seam No. 504. The proposed longwall panel was adversely situated below goaf edges of the workings in these two overlying extracted seams. An analysis of the inter-burden rock mass among these coal seams showed the presence of strong, massive strata of sandstones and conglomerates with uniaxial compressive strength values between 70 MPa and 120 MPa. The stress is measured at different mining stages by Compact Conical-ended Borehole Monitoring (CCBM).
   A simple laboratory test of the coal sample found a high value of the ratio of the elastic deformation to the total deformation (>0.8), indicating the energy-storing characteristic (prone to burst/bump) of the coal seam.
    AV ČR Brno, Ústav geoniky
Kód přispěvatele
    AV ČR, ÚG
Zdrojový formát
Datum importu
    24. 10. 2014