低频强动力扰动作用下深井巷道围岩锚固体失稳机制

项目名称： 低频强动力扰动作用下深井巷道围岩锚固体失稳机制

项目编号： No.U1304517

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 韦四江

作者单位： 河南理工大学

项目金额： 30万元

中文摘要： 深井开采过程中，冲击地压所诱发的低频强动力扰动，导致锚杆支护巷道围岩损伤、片帮、冒落甚至闭合，然而目前尚未形成普适性的应对措施。现场监测低频冲击波在锚杆支护巷道围岩弹性区、塑性区和破碎区内的衰减规律、频谱特征和能量特征，对巷道冲击地压类型进行分类。在现场测试的基础上，研究锚固系统在低频强动力扰动作用下，树脂-孔壁、树脂-锚杆及潜在岩体破坏界面的损伤演化规律，建立锚固系统临界失稳的判别式。研究静载和低频强动力扰动组合作用下，群锚锚固分离体的应变-应力关系、锚固系统载荷和锚固体破坏特征；研究巷道围岩锚固系统中锚固界面损伤演化与巷道围岩锚固体承载结构临界失稳的联系，建立界面损伤、锚固系统各构件工况与锚固体承载结构临界失稳的关系式，建立承载结构临界失稳的判别准则。提出低频强动力扰动作用下锚杆支护巷道围岩稳定性分类方案和支护对策。为冲击地压作用下，深井锚杆支护巷道围岩控制提供理论支撑

中文关键词： 冲击地压；频谱特征；动态灵敏度系数；巷道围岩；动态响应

英文摘要： Damage， spalling， caving， even closure of surroungding rock in deep roadway with bolting support results from low frequency strong dynamic disturbance generated by rock burst or blast. Howerver， universal approaches have not formed. Field experiments on attenuation law， characters of frequency spectrum and energy of low frequency shock wave will be carried out for elastic zone， plastic zone and fracture zone of roadway surrounding rock; and energy formula of shock wave in roadway surrounding rock will be created. And rock burst type of roadway will be classified. Based on field test， damage law evolution of interfaces of resin-bore wall， resin-bolt and potential fracture in rockmass will be studyed. And discriminant of anchorage system instablity will be established. Relation of strain-stress， loads of anchorage system and bolted body fracture character of detached anchorage body with bolts inpacted by shock wave combined with static load will be studyed. Damage evolution related with bearing structure critical instability will be disscussed. Relational expression with interface damage， working condition of components of anchorage system and bearing structure critical instability will be built， and critical instability of criterion of anchorage system and bearing structure will be established. To sum up above r

英文关键词： rock burst；spectrum characteristics；dynamic sensitivity coefficient；surrounding rock of roadway；dynamic response