This paper presents the development of an innovative standing support for underground mines. The main feature of this standing support is its exterior container, a combination of polyvinyl chloride (PVC) with large rupture strain and fibre-reinforced polymer (FRP) with high strength-to-weight ratio. To demonstrate the advantages of this cementitious grout filled PVC-FRP tubular (PFT) standing support, a series of compression tests were conducted. Test variables included the strength of cementitious grout infill material and the thickness of FRP jacket. Compression tests were also conducted on cementitious grout-filled PVC tubular (PT) support and cementitious grout-filled FRP tubular (FT) support. These tests showed that PFT support presents a typical strain-hardening behaviour together with an outstanding axial deformation ability (>20% of the overall height of the support). In addition, the maximum compressive strength of PFT support is much higher than that of the corresponding PT support and FT support. Furthermore, using thicker FRP jacket or high strength cementitious grout material can enhance the load carrying capacity of PFT support. These comparative results indicated that the high performance of PFT support is mainly attributed to the combination of confining constituents (i.e. PVC and FRP) and infill material.

本文介绍了对地下矿井的创新性长期支持的发展。这种站立式支撑架的主要特征是其外部容器，该容器是具有大断裂应变的聚氯乙烯（PVC）和具有高强度重量比的纤维增强聚合物（FRP）的组合。为了证明这种水泥浆填充的PVC-FRP管状（PFT）立式支撑的优势，进行了一系列压缩试验。测试变量包括水泥灌浆填充材料的强度和FRP护套的厚度。还对填充水泥浆的PVC管（PT）和填充水泥浆的FRP管（FT）进行了压缩试验。这些测试表明，PFT支座具有典型的应变硬化行为以及出色的轴向变形能力（> 支架总高度的20％）。另外，PFT载体的最大抗压强度远高于相应的PT载体和FT载体的最大抗压强度。此外，使用较厚的FRP护套或高强度水泥灌浆材料可以增强PFT支架的承载能力。这些比较结果表明，PFT载体的高性能主要归功于约束成分（即PVC和FRP）和填充材料的结合。