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Fill design and implementation with challenging material - Wambo fill project - case study

机译：用具挑战材料填补设计和实施 - WAMBO填充项目 - 案例研究

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Peabody Energy is the world's largest private sector coal company and a global leader in sustainable mining and clean coal solutions. The company serves metallurgical and thermal coal customers in more than 25 countries on six continents and has mining operations across Queensland and New South Wales. Peabody's Wambo Coal Mine is a longwall mining operation located in the Hunter Valley Region of NSW, Australia. Longwall mining activities are ongoing in the Wambo coal seam. Overlying a section of the underground operations (at the surface) is an alluvial channel that hosts an important water course for the area. Abandoned 'board and pillar' workings exist approximately half way between the Wambo seam and the surface. These workings (referred to as the 'Homestead workings') are within the Whybrow seam and when previously mining this area very poor ground conditions were experienced. Peabody identified a risk of sink holes forming, between the Homestead workings and the surface, during longwall extraction of the underlying section of the Wambo seam. The perceived sinkhole formation was recognised as having the potential to 'break' the surface aquifer, resulting in a significant environmental impact as well as jeopardising the safety and productivity of the longwall operations. This paper presents the design and implementation of a novel cost effective strategy for filling these workings. The old workings in the Whybrow seam, requiring fill, consisted of approximately 15 km of roadway, spread over an area of approximately three hectares, involving more than 100 boreholes. The most appropriate material available onsite was a natural alluvial soil. However, the variable nature of this material presented a number of challenges Furthermore, the fill material was to be exposed to a unique set of loading conditions. This paper details test work and analysis strategies employed to ensure that the fill requirements were satisfied. The results are then converted into a flexible framework that facilitates cost effective filling, while ensuring that the design requirements are maintained for the range of different fill source materials. Finally, this paper describes the implementation of the fill solution, presenting useful data collected during the operation and highlighting aspects of the project that worked well and those that posed additional challenges.
机译：皮博迪能源是世界上最大的私营部门煤炭公司和可持续采矿和清洁煤炭解决方案的全球领导者。该公司在六大大陆的25多个国家提供冶金和热煤层，并在昆士兰州和新南威尔士州的采矿业务。 Peabody's Wambo Coamine是一个位于澳大利亚南威尔士州猎人谷地区的长墙矿业运营。 Longwall采矿活动在WAMBO煤层正在进行中。覆盖地下行动（表面）的一部分是一个激动的渠道，用于该地区的重要水路。被遗弃的“董事会和支柱”的工作在沃博接缝和表面之间存在大约一半。这些工作（称为“Homestead Workings”）在Whowbrow接缝中，并且在前挖掘该地区经历了非常差的地面条件。在沃文接缝的下面的界面的长壁提取期间，皮瓣体识别在宅基地和表面之间形成沉积孔的风险。感知的下沉孔形成被认为具有“破坏”表面含水层的可能性，从而产生了重大的环境影响以及危及长墙操作的安全性和生产率。本文介绍了一种填补这些运作的新型成本效益战略的设计与实现。 Whybrow缝的旧工作，需要填充，由大约15公里的道路组成，散布在大约三公顷的面积，涉及100多个钻孔。现场最合适的材料是一种天然的冲积土壤。然而，这种材料的可变性质进一步呈现了许多挑战，填充材料将暴露于独特的载荷条件。本文详细说明了用于确保满足填充要求的测试工作和分析策略。然后将结果转换为灵活的框架，便于成本效益填充，同时确保为不同填充源材料的范围保持设计要求。最后，本文介绍了填充解决方案的实现，呈现在运行期间收集的有用数据，并突出显示的项目良好的方面以及构成额外挑战的项目。

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