This paper investigates the use of a thin spray-on liner (TSL) as stope face support in narrow width tabular stopes. The application of areal support is difficult in these stopes because of the small stoping width and the large area of hanging wall that is exposed by the long face lengths and regular blasting. A simple analytical model of a collapsing block supported by a TSL is explored to determine the parameters to be considered for underground use of the liners. Most literature on TSL focusses mostly on specialised laboratory testing. Almost no large scale testing to determine TSL strengths, when it is applied to blocky rock masses, has been conducted. To simulate the discontinuous nature of the hanging wall in mining stopes, a large scale rig and test methodology was developed. Four different polymer-modified cementitious TSL products were tested and the results are described in the paper. For the particular experimental setup and a curing time of 24 h, the maximum load carrying capacity of the strongest TSL was 305 kg, while a 50 mm thick shotcrete had a capacity exceeding 1100 kg. The test results indicate that care should be exercised when attempting to use a TSL as a structural element in support systems.

本文研究了在窄幅板状采场中使用薄喷式衬纸（TSL）作为采场面支撑的情况。在这些采场中，很难使用区域支撑，这是因为较小的挡块宽度和较大的悬挂壁面，而这些壁面由于较长的工作面长度和定期爆破而暴露在外。探索了由TSL支撑的塌陷块的简单分析模型，以确定衬砌在地下使用时应考虑的参数。关于TSL的大多数文献都集中在专门的实验室测试上。当将TSL应用于块状岩体时，几乎没有进行过确定TSL强度的大规模测试。为了模拟采矿场中悬挂壁的不连续性，开发了大型钻机和测试方法。测试了四种不同的聚合物改性水泥TSL产品，并在论文中描述了结果。对于特定的实验设置和24小时的固化时间，最大承载能力最强的TSL的重量为305千克，而50毫米厚的喷射混凝土的承载力超过1100千克。测试结果表明，在尝试将TSL用作支撑系统中的结构元素时应格外小心。