摘要
湿喷纤维混凝土具有抗变形、抗裂性等优异性能。为研究湿喷纤维混凝土支护效果,开展了湿喷纤维混凝土单轴抗压试验、切口梁弯曲韧性试验和圆盘弯曲测试。试验结果表明,尽管纤维的掺入略微降低了湿喷混凝土的抗压强度,但显著提升了其抗弯强度和能量吸收能力。巷道支护试验结果表明,钢纤维湿喷混凝土的抗压强度可达到25 MPa,喷层厚度保持在100~150 mm,反弹量小,支护效果良好。
Fiber-reinforced wet-mix shotcrete has excellent properties such as deformation resistance and crack resistance.To evaluate the support performance of fiber-reinforced wet-mix shotcrete,a series of tests were conducted,including uniaxial compressive tests,notched beam flexural toughness tests,and disk flexural tests.The test results indicate that,although the addition of fibers slightly reduces the compressive strength of wet-mix shotcrete,the flexural strength and energy absorption capacity have been significantly enhanced.The roadway support test results shows that the compressive strength of the steel fiber wet-mix shotcrete can reach 25 MPa,the thickness of the spray layer is maintained at 100-150 mm,with a minimal rebound and notable support effectiveness.
作者
郭荣华
韩斌
潘岳浩
胡亚飞
王琪
GUO Ronghua;HAN Bin;PAN Yuehao;HU Yafei;WANG Qi(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal,University of Science and Technology Beijing,Beijing 100083,China)
出处
《矿业研究与开发》
北大核心
2025年第10期160-165,共6页
Mining Research and Development
基金
国家自然科学基金项目(52374115)。
关键词
湿喷混凝土
纤维
单轴抗压强度
弯曲韧性
能量吸收值
Wet-mix shotcrete
Fiber
Uniaxial compressive strength
Flexural toughness
Energy absorption value
