回采巷道锚杆支护影响因素的FLAC 分析

 介绍了目前国际上比较流行的有限差分程序FLAC3. 3。以山东新汶矿区锚杆支护回采巷道为条件, 运用该软件分析了地应力、层理、节理分布及其强度和刚度、围岩强度等多种因素对巷道围岩变形和破坏的影响, 并与井下实测数据进行了对比。结果表明, 岩层不连续面分布及力学性质对顶板岩层变形和锚杆受力影响最为明显, FLAC3.3 软件在分析几何非线性和大变形问题方面性能优越。

FLAC ANALYSIS ON AFFECTING FACTORS TO ROCKBOLTING IN GATEROADS

The popular finite difference code FLAC3.3 is introduced. The influences of in situ stresses, beddings and joints, strength of surrounding rock on the deformation and damage of the rock surrounding gateroads are analyzed under the condition of a bolted maingate in Xinwen coal area. The numerical modeling results are compared with the measurement data in the field. It is pointed out that the distribution and mechanical properties of discontinuous planes are the most important factors to the deformation and rock bolt loads. FLAC3.3 is outstanding to solve geometric non linear and large strain problems.