Analysis of the design and performance characteristics of pumpable roof supports.
Analysis of the design and performance characteristics of pumpable roof supports.
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DOI：
10.1016/j.ijmst.2016.10.003
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发表时间：
2017-01
影响因子：
11.8
通讯作者：
Timothy B
中科院分区：
文献类型：
--
作者：
Timothy B
可泵式顶板支护目前被用于为长壁开采提供安全的工作环境。由于不同的可泵送支架在视觉上相似，并且基本上以与其他支架相同的方式安装，因此人们倾向于认为它们都以相同的方式运行。然而，有几个设计参数会影响其性能，包括影响所提供的约束程度的胶凝材料特性和袋构造实践。充分了解这些设计参数的影响是必要的，以优化支持应用，并提供一个基础，使支持性能的进一步改善。本文评估了各种支持设计参数的影响，通过检查全面的性能测试，使用国家职业安全与健康研究所（NIOSH）矿井顶板模拟器（MRS）的制造商的开发和质量控制测试的一部分。这些测试进行了分析，以确定支持设计参数和所产生的性能之间的相关性。基于7年多的160多项试验，对可量化的模式进行了检查，以评估支撑尺寸、胶凝材料类型、钢丝间距以及单壁与双壁袋设计与支撑能力、刚度、减载事件和屈服特性之间的相关性。
Pumpable roof supports are currently being used to provide a safe working environment for longwall mining. Because different pumpable supports are visually similar and installed fundamentally in the same manner as other supports, there is a tendency to believe they all perform the same way. However, there are several design parameters that can affect their performance, including the cementitious material properties and the bag construction practices that influence the degree of confinement provided. A full understanding of the impact of these design parameters is necessary to optimize the support application and to provide a foundation for making further improvements in the support performance. This paper evaluates the impact of various support design parameters by examining full-scale performance tests conducted using the National Institute for Occupational Safety and Health (NIOSH) Mine Roof Simulator (MRS) as part of manufacturers’ developmental and quality control testing. These tests were analyzed to identify correlations between the support design parameters and the resulting performance. Based on more than 160 tests over 7 years, quantifiable patterns were examined to assess the correlation between the support dimensions, cementitious material type, wire pitch, and single-wall vs. dual-walled bag designs to the support capacity, stiffness, load shedding events, and yield characteristics.