预应力锚杆支护参数的设计  

Design for pretensioned rock bolting parameters

作　　者：康红普[1] 姜铁明[2] 高富强[1] 

机构地区：[1]煤炭科学研究总院开采设计研究分院,北京100013 [2]晋城无烟煤矿业集团有限责任公司技术中心,山西晋城048006

出　　处：《煤炭学报》2008年第7期721-726,共6页Journal of China Coal Society

基　　金：国家科技支撑计划基金资助项目(2006BAB16B02,2006BAK03B06)

摘　　要：在不考虑原岩应力场的条件下,采用有限差分数值计算软件FLAC3D,分析了锚杆预应力、锚杆长度、锚杆支护密度、锚杆安装角度及锚固方式等支护参数对锚杆预应力引起的应力场-锚杆预应力场的影响.基于数值模拟结果,结合井下应用情况,对预应力锚杆支护涉及的参数,包括预应力,锚杆直径、强度、长度、密度、角度,锚固方式,组合构件参数,锚索支护参数等进行了全面、系统的分析,提出了预应力锚杆支护参数选择的原则、范围.A series of parametric studies were carried out using the finite difference code FLAC^3D to investigate the influence of various rock bolting parameters on the stress distribution characteristics, these parameters included pretensioned stress magnitude, bolt length, density, installed angle and anchorage pattern. The in situ stresses were not considered in present numerical models. Subsequently, a comprehensive systematic analysis of rock bolting parameters, including pretensioned stress, bolt diameter, strength, length, density, installed angle, anchorage pattern, other surface control devices and cable bolting parameters was proposed on the base of the combination of the numerical modeling results and the application conditions of rock bolts in underground coal mine sites. Accordingly, the principle and scope of the selection of pretensioned rock bolting parameters were put forward.

关 键 词：预应力 锚杆支护 支护参数 

分 类 号：TD353.6[矿业工程—矿井建设]