Roadway Anchor Support Design Method Based on the “Three Zones” of Roadway Roof

Abstract

Aiming at the problem of serious deformation and failure of the surrounding rock of the main roadways in diabase zone in west wing on-500m leve in Dongbaowei Coal Mine and roof caving occurring several times, the rupture characteristics of roadway roof rock was observed in this paper. And the observation result shows that the rupture of the roof rock of the roadways in diabase zone has obvious zoning characteristics, and the roadway roof rock is divided into three zones: fragmentation zone, fissure zone and intact rock zone. According to this, this paper introduced a new concept of controlling roadway roof subsidence and redesigned the support parameters of the roof of the roadway in diabase zone. The deformation monitoring of the testing roadway roof rock was carried out, and the monitoring result shows that the anchor supporting scheme which was based on the “three zones” of roadway roof could control the roof rock deformation better. This indicates that roadway anchor support design method which is based on the “three zones” of roadway roof is correct and feasible.