内钢板高强钢纤维混凝土井壁力学特性研究

摘要

针对特厚（600～800m）冲击层中煤矿立井井筒支护问题，提出了使用内钢板－高强钢纤维混凝土复合井壁结构，为研究该井壁结构的水平承载特性，利用相似理论推导，采用物理模拟试验的方法，进行了4个模型井壁的破坏性试验，研究了该类井壁结构的水平承载特性和变形特征。研究表明，内钢板－高强钢纤维混凝土复合井壁属约束混凝土结构，是特厚冲积层中井筒支护理想的井壁结构形式之一。%Aiming at the support problems of the shaft lining in extra thick ( from 600m to 800m in depth ) alluvium ranging, the paper proposes a composite shaft wall structure using high-strength steel fiber reinforced concrete with inner steel plate. To study its horizontal bearing and deformation characteristics, 4 shaft wall model destructive tests are performed with the physical simulation based on the similarity theory. The result shows that, it belongs to constraint concrete structure which can give full play to the capability of steel plate and steel fiber concrete, and shows favorable bearing capacity and tensility.