| 摘要 |
FIELD: mining, particularly lining tunnels, galleries or other underground cavities. ^ SUBSTANCE: method involves drilling bore-holes in mine sections juncture areas and installing supporting girder. The boreholes are drilled for depth l calculated from l=C+Deltal, where C is mine rock slip zone, which characterizes rock destruction degree, Deltal is next bore-hole section nearest to mine rock slip zone C and having length, which is 20-30% exceeds rock slip zone C length in dependence of side mine rock strength, m. The girder composed of at least two members provided with orifices is installed by inserting girder member ends in end bore-holes and connecting above ends with each other by means of clamps with nuts and straps. After installation of girder remaining behind mine face and spaced a distance defined by mine roof rock stability from mine face bore-holes are drilled in mine rock through girder orifices and girders are pressed to mine roof with the use of bolts inserted in the bore-holes. ^ EFFECT: increased efficiency due to improved roof supporting conditions. ^ 4 dwg |
