关键词: 树脂锚杆, 锚固性能, 温度, 应力场, 试验, 数值模拟

Abstract: To analyze the phenomenon that anchoring force of resin anchored bolt often decreased where rock bolting was carried out in the roadway near spontaneous combustion region, we studied the influence of temperature on anchoring performance of resin anchored bolts in this paper, by using the comprehensive research of laboratory test and numerical simulation. The results of pull-out tests of resin anchored bolts under different temperatures show that temperatures have great influence on anchorage performance of resin anchored bolt. The anchoring force is the largest when the temperature is 25℃, and the anchoring force descends obviously with the borehole temperature increases. Additionally, FLAC3D was adopted to simulate and analyze the anchorage system of single bolt support small-scale, and the results show that the coupled multi-physics processes exist to a certain extent between the stress field and temperature field of rock mass. The stress distribution states of rock mass are different under the same external load when the temperatures of heat source are different. On the basis, we find that the temperature variations have a certain effect on physical and mechanical properties of rock mass and curing reaction process of resin capsules, and put forward the technological approaches to ensure supporting effect under different temperatures.

Key words: color: black, font-size: 10.5pt, mso-bidi-font-size: 12.0pt, mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-GB, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA" lang="EN-GB">resin anchor bolts, anchorage performance, temperature, stress field, test; numerical simulation