Energy-absorbing anchor bolts are widely used in geotechnical engineering, but there is no effective numerical simulation approach for evaluating them at the engineering application level. According to typical laboratory test results, the energy absorption criterion (F ≥ F_y) and breakage criterion (δ ≥ δ_f) are defined. The constant resistance energy absorption mechanical model and the increasing resistance energy absorption mechanical model are built. Based on the above two basic models, five mechanical models of energy-absorbing bolts, namely, constant resistance and large-deformation anchor bolts (CRLD), increasing resistance and large-deformation anchor bolts (IRLD), Y-bolts, cold drawn constant resistance and large-deformation anchor bolts (CCLD) and D-bolts, are developed. Based on the modification of cable elements in FLAC^3D (Fast Lagrangian Analysis of Continua in 3 Dimensions), the numerical models of the above five kinds of energy-absorbing bolts are established, and the implementation process and specific capabilities of these models are introduced in detail. Numerical tensile tests are carried out, and the results show that the program is effective in executing the above mechanical models. Numerical simulations of deep coal mine roadways supported with different energy-absorbing bolts and absorbing parameters were carried out. The results show that the effectiveness and sensitivity of the mechanical model of energy-absorbing bolts and conventional bolts are realized by this method. The breaking effect of conventional bolt support and the yield support effect of energy-absorbing bolts in the roadway can also be better simulated.

吸能地脚螺栓广泛应用于岩土工程，但在工程应用层面尚无有效的数值模拟方法对其进行评价。根据典型的实验室测试结果，能量吸收_标准（F≥Fy _）和破损 标准 （  δ≥δf ) 被定义。建立了恒阻吸能力学模型和增阻吸能力学模型。在以上两种基本模型的基础上，建立了吸能螺栓的五种力学模型，即恒阻大变形地脚螺栓（CRLD）、增阻大变形地脚螺栓（IRLD）、Y型螺栓、冷拔恒力螺栓抗大变形地脚螺栓 (CCLD) 和 D 型螺栓，被开发。基于对FLAC ^3D （Fast Lagrangian Analysis of Continua in 3 Dimensions）中索单元的修改，建立了上述五种吸能螺栓的数值模型，并介绍了这些模型的实现过程和具体能力。细节。数字进行了拉伸试验，结果表明该程序在执行上述力学模型方面是有效的。对不同吸能螺栓及吸能参数支撑的深部煤矿巷道进行数值模拟。结果表明，该方法实现了吸能螺栓和常规螺栓力学模型的有效性和灵敏度。常规锚杆支护的破断效果和吸能锚杆在巷道中的屈服支护效果也能得到较好的模拟。