摘要
运用弹性薄板弯曲理论、有限差分法对全煤巷道围岩结构变形破坏机理进行了分析,并建立反映全煤巷道围岩基本特征的力学模型。分析了确定全煤巷道棚架支护拆卸长度的理论依据及不同开挖顺序造成的围岩应力场分布变化特征,以确定其理论拆卸长度及开挖顺序。研究结果表明:依据弹性力学薄板弯曲理论可以确定理论拆卸长度公式,全煤巷道开挖顺序确定为第一步开挖顶板煤层,第二步开挖两帮煤层为最优施工方案。研究结果可以给同类条件下全煤巷道支护拆卸长度及开挖顺序的确定提供参考。
By using the elastic bending plate theory and finite difference method, the failure mechanism of surrounding rock deformation in full coal roadway is analyzed, and the mechanics model of reflecting the basic features of the surrounding rock in full coal roadway is established. Analyses the theoretic basis to determine the removing length of canopy frame supporting in full coal roadway and the change features of which various excavation order cause the surrounding rock stress distribution, determines the theoretical removing length and excavation order. ,The study resuits show that according to the theory of elastic mechanics bending plate can be determined theory formula of the removing length , the full coal roadway excavation sequence determined for the first step excavation roof coal seam, the second step excavation two sides coal seam, it is the best construction plan. The results can provide the reference for the determination of removing length and excavation order in the full coal roadway support under similar conditions .
出处
《山西焦煤科技》
2013年第2期43-46,共4页
Shanxi Coking Coal Science & Technology
关键词
弹性薄板弯曲
围岩力学效应
开挖顺序
有限差分法
Elastic bending plate
Surrounding rock mechanics effect
Sequence of excavation
Finite difference method
