Research on Failure Mechanism and Support Technology of Water-rich Crushed Soft Rock Roadway
With the depletion of shallow mineral resources,the mine gradually develops to the deep,and the floor heave deformation of the roadway is especially prominent in the face of deep water-rich broken soft rock roadway support.In order to ensure the smooth passage through the water-rich broken soft rock ar-ea,aiming at the support problem of-570 m horizontal roadway in a mine,the failure mechanical character-istics of surrounding rock were analyzed,the mechanical model of floor heave was established,and the breaking mechanism of surrounding rock in the water-rich broken soft rock roadway was comprehensively analyzed.The combined support technology inverted arch and masonry arch is put forward.The field test re-sults show that the combined support technology of inverted arch and masonry arch can effectively reduce the leaching water,reduce the water infiltration into the floor,improve the surrounding rock conditions of the floor,effectively reduce the floor heave of the roadway,and the maximum floor heave is less than 50 mm,ensuring the stability and safety of the surrounding rock and support of the mine roadway.
underground miningdeep high stresswater-rich broken soft rockcombined support with inverted arch and masonry arch
NETL
NSTL
万方数据
