Bolting requirements for non-jointed stratified rock roof
The issue of prescribing the support requirements for stratified roofs of no major discontinuities other than horizontal bedding planes is hereby approached ideally as well as pragmatically. Firstly, the unreinforced case is analytically defined; the solution acquired by elementary beam theory for a fixed beam under distributed load is compared to an Airy stress function solution for a fixed beam under its own weight based on Timoshenko beam theory. Finally, a finite difference numerical solution is performed and verified. The model is then used to investigate the behavior of a two-member stratified roof with contact plane governed by the angle of friction and tightened in order to mobilize the shearing reaction force at the discontinuity. Parametric analyses to investigate the possible effects of elastic parameters such as the modulus of elasticity and the Poisson’s ratio and also the interbedding friction angle and its effect on the response of the model conclude this section. The last part involves the numerical implementation of a bolting support system providing the previously determined force and the prescription of its characteristics, i.e. length, spacing, diameter and pretension of bolts. The impact of applying concentrated compressive forces instead of the theoretical distributed support is also outlined.
P.Yiouta - Mitra A.I.Sofianos
National Technical University, Athens
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）