预应力锚杆支护参数的设计_康红普精选.pdf

33 7 V o.l 33 N o. 7 200 8 7 JOURNA L OF CH INA COA L SOC IETY Ju ly 2008 : 0253- 9993( 2008 07 - 072 1- 06 1 2 1 康红普 , 姜铁明, 高富强 ( 1 , 1000 13; 2, 048006 : 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 FLA C3D , 分析了锚杆预应 力锚杆长度锚杆 护密度锚杆安装角度及锚固方式等 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 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 护参 数等进行了全面系统的分析, 提出了预应力锚杆 护参数选择的原则范围. : 预应力; 锚杆 护; 护参数 : TD 3536 : A Design for pretensioned rock bolting parameters 1 2 1 KANG H ong-pu , JIAN G T ie-m ing , GAO Fu-q iang ( 1 C oalM in ing and D es ign ing B ranch, China Coa l R esearch In st itu te, B eij ing 1000 13, Ch ina; 2J inch eng A n thracite Coa lM in ing G rop. L td. , J incheng 048006, Ch ina ) 3D Abstract: A series o f param etric studiesw ere carried out using the fin ite d ifference code FLA C to investigate the in fluence of variou s rock bolting param eters on the stress distribu tion characterist ics, these param eters inc luded pre- tensioned stress m agnitude, bolt length, density, installed ang le and anchorage pattern. T he in situ stresses w ere not considered in present num erica l mode ls. Subsequently, a comprehensive system atic analysis of rock bo lting pa- ram eters, including pretensioned stress, bo lt d iam eter, strength, length, density, insta lled angl