摘要
运用相似模拟试验和分形几何理论,研究了受采动影响的回采巷道围岩裂隙产生-扩展-贯通-破坏的演化规律。巷道两帮围岩裂隙呈弧形向巷帮深处扩展,并按幂函数规律衰减;两帮顶板裂隙呈二次曲线演化规律;巷道上方顶板裂隙主要集中在巷帮上方。用裂隙密度分形维数定量描述了巷道围岩裂隙的分布和演化。研究结果有利于了解巷道围岩内部破裂的发生与发展规律,为选择巷道锚固方案和优化锚固设计参数提供了依据。
The evolution law of the crack generation-extension-connection-failure in the surrounding rocks of roadway caused by mining is investigated in the paper by using similar simulation and fractal geometry theory. Cracks in the two roadway walls are extending to the depth in arc shape and diminish in a power function law. Cracks at the top of the two sides abide by the conic evolution law. The cracks of the roadway top mostly concentrate at the top of the roadway walls. The crack distribution and evolution of the surrounding rocks of roadway can be quantitatively depicted by the fractal dimension of crack density. The research results are useful for understanding the occurrence and development law inside the surrounding rocks,and applied as the basis of selection of bolting scheme of roadway and optimization of bolting parameters.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第19期3292-3297,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
教育部高等学校骨干教师基金(J20046)
山西省青年科学基金(961027)
关键词
采矿工程
相似模拟
围岩裂隙
分形演化
裂隙密度
分形维数
mining engineering,similar simulation,cracks in surrounding rocks,fractal evolution,crack density,fractal dimension
