Lagging mat independent of the distance between support units

摘要

For the roadway support in underground mining and tunnelling, lagging mats are provided whose longitudinal bars are bent to form double hooks only at one mat end or at one mat side, while the opposite mat side has longitudinal bars running rectilinearly. At this opposite side, cross-bars are provided on the ends of the longitudinal bars. The cross-bars are arranged on the top side or also on the underside of the mat and catch on the lug ends when adjacent lagging mats are laid one on top of the other so that there is a bond in the longitudinal direction of the roadway. The lug ends themselves are connected behind the formed double hooks to the longitudinal bars via at least two cross-bars so that a stabilised double hook results, the free end of the lug ends or bar tips being bent up from the mat plane so that the respective cross-bar of the adjacent mat can be effectively secured there. Thus a lagging mat which can be used independently of the distance between support units is created which can be used for several different distances between support units. It is also conceivable to design such a lagging mat in a length overlapping several panels. IMAGE