摘要
Large cross sectional roadways driven along the previous goaf are always in fragmental surrounding rocks, and remarkably deform under the influence of mining disturbance. It can successfully be supported by the composite bolt-bar-chain mesh support. However, success can only be achieved by getting hold of the key techniques as follows: rationally determining the size of the goaf-side rib, adopting bolts with extendible rod, determining rational parameters and strengthening the integral structure of the supporting system. These have proved effective and profitable by the practice at Dongpang colliery, Xingtai Coal Mining Administration, Hebei province,and are now in application
Large cross sectional roadways driven along the previous goaf are always in fragmental surrounding rocks, and remarkably deform under the influence of mining disturbance. It can successfully be supported by the composite bolt-bar-chain mesh support. However, success can only be achieved by getting hold of the key techniques as follows: rationally determining the size of the goaf-side rib, adopting bolts with extendible rod, determining rational parameters and strengthening the integral structure of the supporting system. These have proved effective and profitable by the practice at Dongpang colliery, Xingtai Coal Mining Administration, Hebei province,and are now in application there
