【摘要】 基于软岩巷道变形破坏规律,对高强锚杆辅助锚注支护加固机理进行了研究分析.采用有限差分软件FLAC2D,对深部软岩巷道使用普通锚喷支护、高强锚杆支护和高强锚杆辅助锚注支护前后围岩变形破坏规律进行了数值模拟,对锚注支护前后围岩的位移及塑性区的变化情况进行了系统分析,并与现场实测结果进行了对比.结果表明,锚注支护利用锚杆与注浆相结合的方法,显著提高了围岩的强度和承载能力,极大地提高了软岩巷道的支护效果,扩大了锚杆的使用范围,能有效控制软岩巷道的围岩变形,具有显著的经济效益.更多还原

【Abstract】 Mechanism of high-strength bolt and bolting-grouting support was studied based on the deformation and failure rules of soft roadway.The deformation and failure rules of deeply buried soft roadway were simulated by using the Finite Difference Software FLAC^2D before and after the common bolting and concreting support,high-strength bolt support as well as high-strength bolt and bolting-grouting support.The displacement of surrounding rock and the plastic zone in these two situations were also analyzed in detail.The calculated results were compared with that of in-situ observation,indicating that the strength and the carrying capacity of surrounding rock are significantly improved and good support effect is achieved and bolt application extent enlarged under the high-strength bolt and bolting-grouting support.The deformation of the roadway can be controlled effectively,providing obvious economic benefits.更多还原