CAJ | 학술논문

针对煤岩巷道锚杆支护锚固失效引起的冒顶问题，建立了煤岩巷道顶板锚杆树脂锚固模型，采用数值模拟的方法对不同锚固方式下树脂锚杆的波导特性进行研究，得到了不同锚固长度与树脂锚杆激振响应特性曲线。通过对比分析，研究得出无论何种锚固方式，检测结果与实际锚固长度的误差大约在1％-6％，同时可采用修正补偿的方法降低检测误差。研究结果得出：采用应力反射波法检测树脂锚杆的锚固长度是一种行之有效的无损检测方法，可实现树脂锚杆锚固长度的便携、准确检测提供技术支持。
침대매암항도묘간지호묘고실효인기적모정문제，건립료매암항도정판묘간수지묘고모형，채용수치모의적방법대불동묘고방식하수지묘간적파도특성진행연구，득도료불동묘고장도여수지묘간격진향응특성곡선。통과대비분석，연구득출무론하충묘고방식，검측결과여실제묘고장도적오차대약재1％-6％，동시가채용수정보상적방법강저검측오차。연구결과득출：채용응력반사파법검측수지묘간적묘고장도시일충행지유효적무손검측방법，가실현수지묘간묘고장도적편휴、준학검측제공기술지지。
Aiming at the roof fall problems , due to the anchorage invalidation in coal and rock roadway supported by bolts, in this paper , a resin anchor fixation model of roof bolt in coal and rock roadway was established .By u-sing numerical simulation method , the research on the waveguide characteristics of resin bolt under different ancho-ring types was conducted , and the excitation response characteristic curves of resin bolt with different anchorage length were obtained .The comparison analysis showed that no matter what kinds of anchoring type , the testing re-sults and the practical errors were about 1%-6%.Meanwhile , crushing compensation method could be adopted to decrease detection error .The result showed that the reflected stress wave is a useful and valuable nondestructive tes -ting method .It can realize portable , accurate testing of anchoring length .