Resin grouted rock bolt support behaviour under shear loading

剪切载荷下树脂灌浆锚杆支护性能

• 批准号: 499953-2016
• 负责人: Milne, Douglas
• 金额: $ 0.23万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618155
• 关键词: Resin; grouted; rock; bolt; support

This research proposal focuses on determining the deformation and strength behaviour of rebar bolts, fully bonded to the rock with epoxy resin. These resin grouted bolts provide support for drift backs in potash mines, which can deform under a combination of shear and dilational movement along clay seams. The load that is induced on rebar bolts due to shear deformation varies with the magnitude of both shear and dilational movement. The resistance to shearing, provided by the adjacent rock mass, also influences the load on the installed support.This research consists of a laboratory component, field testing component as well as a field monitoring component designed to measure the response of rebar to shear loading and deformation. Successful completion of the work depends upon detailed measurements on the behaviour of the grouted rebar under load. To obtain these measurements, a combination of proven and experimental approaches will be used to measure the rebar load response to a shearing deformation using both strain gauges and fibre-optic cable bonded to the rebar. The successful completion of this research will provide the mine engineer with guidelines to relate observed field deformations with support loads, which will assist in the design of effective ground support.

本研究建议的重点是确定钢筋螺栓的变形和强度行为，完全粘结到岩石与环氧树脂。这些树脂灌浆螺栓为钾盐矿中的巷道提供支撑，这些巷道可能会在沿着粘土煤层的剪切和扩张运动的组合作用下发生变形。沿着粘土煤层。由于剪切变形而在钢筋螺栓上引起的载荷随着剪切和扩张运动的大小而变化。由围岩提供的抗剪强度也会影响已安装支架上的荷载，本研究由实验室部分、现场测试部分以及现场监测部分组成，旨在测量钢筋对剪切荷载和变形的响应。工程的成功完成取决于对灌浆钢筋在荷载下的行为进行详细测量。为了获得这些测量值，将使用经过验证的和实验方法的组合来测量钢筋对剪切变形的载荷响应，使用应变计和光纤电缆粘合到钢筋。这项研究的成功完成将为矿山工程师提供指导方针，将观测到的现场变形与支护载荷联系起来，这将有助于设计有效的地面支护。