Optimization of Bolt-Mesh-Anchor Combined Support of Large Deformation Coal Entry Affected by Mining of Donghuantuo Mine
Abstract：this paper analyses the surrounding rock weak structure deformation and bolting support mechanism in order to resolve the serious deformation of the coal entry in Donghuantuo Coal Mine, makes overall investigation on the deformation characteristics of surrounding rock under the influence of mining. The bolt-mesh-anchor support parameters are optimized. In addition, the de- sign scheme of bolt- mesh- anchor combined support is put forward : bolting supports enhance the self- bearing capacity, the floor comer bolts play an important role in controlling the heave,the anchor cable supports reduce the tensile stress area,the flexible structure are formed by metal mesh. The observation results in the field show that the bolt-mesh-anchor combined support can a- chieve the effective support of the large deformation coal entry with soft roof and floor. The technical measures described in this paper provide a reference for the mines with similar geological conditions.
Keywords：roadways affected by miningboh- mesh- anchor combined supportlarge deformationoptimization design
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 6-10 )