The conditions for proper operation of the arch-rectangular support

IF 1.2 4区工程技术 Q3 MINING & MINERAL PROCESSING

Archives of Mining Sciences Pub Date : 2023-07-20 DOI:10.24425/ams.2019.126281

M. Rotkegel

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引用次数: 0

Abstract

Steel arch-rectangular support has a wide range of applications in Polish coal mines due to its asymmetrical shape. The frame has an arched outline on one side of the side wall, while on the opposite side it is rectangular. As a result, the support is ideal for securing set up room and recovery room. It can also be successfully used to secure three-way intersections of underground workings. To a large extent, however, the importance of these advantages is diminished by relatively low load-bearing parameters, resulting from a partially straight canopy, as well as the asymmetrical distribution of the load acting on the support in underground conditions. In order to ensure the proper and optimal operation of such frames, in addition to the standard requirements for roof supports, additional conditions must be met. The basic requirement is to support the end of the canopy on the corner of the excavation. This article presents examples of arch-rectangular supports, their applications as well as laboratory tests and strength analysis of the frames and its elements. These tests allowed the requirements regarding the construction of the frame, the selection of the support and the conditions of building in the excavation to be specified.

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拱矩形支座正常使用的条件

钢拱矩形支架由于其形状不对称，在波兰煤矿中得到了广泛的应用。该框架在侧壁的一侧具有拱形轮廓，而在另一侧则为矩形。因此，支撑是理想的安全设置室和恢复室。它也可以成功地用于保护地下工程的三向交叉路口。然而，在很大程度上，这些优势的重要性被相对较低的承重参数所削弱，这些参数是由部分直顶盖造成的，以及在地下条件下作用在支架上的荷载的不对称分布。为了确保这些框架的正确和最佳运行，除了屋顶支撑的标准要求外，还必须满足其他条件。基本要求是顶棚的端部要支撑在开挖角上。本文介绍了拱矩形支撑的实例，它们的应用以及框架及其元件的实验室测试和强度分析。这些测试允许对框架的构造、支撑物的选择和挖掘中建筑物的条件进行规定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archives of Mining Sciences 工程技术-矿业与矿物加工

CiteScore

2.40

自引率

16.70%

发文量

审稿时长

20 months

期刊介绍： Archives of Mining Sciences (AMS) is concerned with original research, new developments and case studies in mining sciences and energy, civil engineering and environmental engineering. The journal provides an international forum for the publication of high quality research results in: mining technologies, mineral processing, stability of mine workings, mining machine science, ventilation systems, rock mechanics, termodynamics, underground storage of oil and gas, mining and engineering geology, geotechnical engineering, tunnelling, design and construction of tunnels, design and construction on mining areas, mining geodesy, environmental protection in mining, revitalisation of postindustrial areas. Papers are welcomed on all relevant topics and especially on theoretical developments, analytical methods, numerical methods, rock testing, site investigation, and case studies.