Abstract
In order to prevent shear failure of cable bolt and give full play to its superior performance in coalmine roadway control, a set of double-shear experimental system was developed to research shear mechanical properties of the cable bolt after its tension test. The results show that the shear fracture of prestressed cable bolt is the result of the interaction of lateral shear and axial tension. The peak shear force of cable bolt is affected by the strength of mortar block, anchoring method, cable bolt type, prestress and other factors. As the mortar block strength decreases, the peak shear force of cable bolt increases. The shear stiffness of cable bolted joint at the initial stage is significantly greater than that at the later stage. The larger the prestressing force of cable bolt, the higher the initial shear stiffness, while later shear stiffness is not obvious. The initial shear stiffness of joints reinforced by fully-encapsulated cable bolt is better than un-anchored cable bolt. Finally, the control measures were proposed to reduce the harmful force of cable bolts and thus avoid cable bolts shear failure, which is of great significance to ensure the support intensity of roadway surrounding rock and realize the safe mining of coal resources.
| Translated title of the contribution | Experimental study of shear mechanical properties of prestressed cable bolts |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1166-1174 |
| Number of pages | 9 |
| Journal | Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology |
| Volume | 47 |
| Issue number | 6 |
| Publication status | Published - 1 Nov 2018 |
| Externally published | Yes |