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首页> 外文会议>Asia-Pacific Conference on Shock amp; Impact Loads on Structures; 20031112-14; Changsha, Hunan,(CN) >TESTING TO EVALUATE THE CONTAINMENT OF MAJOR IMPACT DAMAGE IN UNDERGROUND MINE WORKINGS
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TESTING TO EVALUATE THE CONTAINMENT OF MAJOR IMPACT DAMAGE IN UNDERGROUND MINE WORKINGS

机译：评估地下矿井作业中主要冲击损伤的测试

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The loading imposed as a result of seismicity in mines is usually the impact loading of installed support. Rock is ejected from the walls of excavations, often at significant velocities, of the order of 5 to 10 m/s. To contain the energy associated with these violent events, it is necessary for the rock support installed to be able to yield and not fail, absorbing the energy during the yielding whilst the support resistance is maintained. To test alternative yielding support systems, a large scale stope support impact testing facility has been developed. This enables energy inputs of up to 300 kJ to be achieved, with impact velocities up to 8 m/s. Energy input is provided by the free fall of a 10000 kg drop weight. The overall objective of the research using this facility is to examine possible ways of preventing the collapse of fractured rock from the essentially unsupported roof area between individual support units. Early testing with the facility showed very promising results as far as containment of major rockburst damage is concerned. A three-year research programme is now in progress to continue with the testing of alternative support systems. The ultimate aim is the provision of safer working conditions in mines due to efficient, effective and economical support. The paper describes the test facility, recent tests carried out on alternative support systems and the results achieved in these tests. The tests include the following: 1. Alternative length headboards on hydraulic props, as a means of increasing the areal coverage of the support units. 2. Interlinked elongates firstly with expendable tendon straps and, secondly, with engineered, potentially reusable linkages. 3. Tests on timber/fibre composite packs with alternative pre-stressing systems. 4. Special "walking" hydraulic stope support units.
机译：矿山由于地震而施加的载荷通常是已安装支架的冲击载荷。岩石通常以相当大的速度从挖掘壁中弹出，速度约为5至10 m / s。为了容纳与这些暴力事件相关的能量，必须使所安装的岩石支撑物能够屈服且不会破损，在屈服过程中吸收能量，同时保持支撑阻力。为了测试替代的屈服支撑系统，已经开发了大型采场支撑影响测试设备。这使得能量输入高达300 kJ，冲击速度高达8 m / s。 10000公斤的重物自由下落可提供能量输入。使用此设备进行研究的总体目标是，研究防止破裂岩石从各个支撑单元之间的基本无支撑屋顶区域坍塌的可能方法。就遏制重大岩爆破坏而言，对该设施进行的早期测试显示出非常可喜的结果。目前正在进行一项为期三年的研究计划，以继续测试替代支持系统。最终目的是通过有效，有效和经济的支持为矿山提供更安全的工作条件。本文介绍了测试设施，在替代支持系统上进行的最新测试以及在这些测试中获得的结果。测试包括以下内容：1.液压支柱上的替代长度床头板，作为增加支撑单元面积的一种手段。 2.相互连接的细长体首先带有易损的腱带，其次具有工程设计的，潜在可重复使用的连杆。 3.使用替代的预应力系统对木材/纤维复合材料包装进行测试。 4.特殊的“行走”液压采场支撑单元。

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