METHOD OF SUPPORT OF MINE WORKINGS (VERSIONS) Russian patent published in 2003 - IPC

FIELD: mining; applicable in supporting of mine workings with use of leading bolting in mining minerals at large depth. SUBSTANCE: as mining by tunneling machine of rock mass advances, leading working is formed whose cross-section is smaller than design cross- section of driven working but with complete height of the latter. Its length is dependable on conditions of stability of roof exposed surface. Drilled in roof of leading working are boreholes for anchor bolts with cross support located along longitudinal axis of driven working and whose ends are pressed to roof by anchor bolts. One anchor bolt is installed at breakage face at angle to working longitudinal axis according to the first version, and with turn to either side from direction of advance so that its projection on horizontal plane forms angle less than 90 deg to working longitudinal axis, according to the second version. The other anchor bolts are installed to under cross support between earlier installed anchor bolts and parallel to them. According to the second version, they are staggered. Final formation of working cross-section is carried out by alternate performance of two stopes, whose roofs are supported by anchor bolts to under cross support located parallel to working breakage face. Anchor bolts extreme in a row on side of intact rock mass are installed with inclination to horizontal, and remaining anchor bolts in row are installed vertically. After bolting of roofs in stopes, formed on exposed surface of driven working in anchor bolt network serving as permanent support. EFFECT: higher efficiency of support of mine workings due to improvement of their operating conditions by increase of roof stability. 2 cl, 15 dwg