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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Study of Fully Grouted Rock Bolt in Tabas Coal Mine Using Numerical and Instrumentation Methods
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Study of Fully Grouted Rock Bolt in Tabas Coal Mine Using Numerical and Instrumentation Methods

机译：使用数值和仪表方法研究塔巴斯煤矿完全灌浆岩螺栓

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摘要

Understanding the interaction between rock bolts and underground rock movement is critical for safe and costeffective underground excavation design. Although early research on this subject involved a balance of theoretical analysis and field measurement, the current work focused on analytical and numerical studies. The present study aimed to study fully grouted rock bolt in Tabas Coal Mine using numerical and instrumentation methods. Tabas Coal Mine is the first fully mechanized coal mine in Iran, producing 1.5 million tons of coal per year. The mine extracts coal by both longwall and room and pillar methods. The roadways have a rectangular profile of 4.5m width and 3.5m height. The field investigations and geotechnical characteristics of rocks showed that the rock masses are weak, requiring a suitable support system. The roadway is intersected by a major fault zone. For the designed roadway, four patterns (two types of bolt with transfer load capacity of 180 and 195 kN) were considered. FLAC analysis showed that 13 bolt 2.4m with 2 NO flexi bolt 4-m patterns were better than other patterns within the faulted zone. Assessing the optimum pattern through instrumentation, there was compromise between the results of numerical modeling with instrumentation reading such as telltales, sonic extensometer, and strain gauge rock bolt. Thus, there was an inspiring agreement between numerical and field methods.
机译：了解岩石螺栓和地下岩石运动之间的相互作用对于安全和成本有效的地下挖掘设计至关重要。虽然对该主题的早期研究涉及理论分析和现场测量的平衡，但目前的工作侧重于分析和数值研究。本研究旨在使用数值和仪表方法研究塔巴斯煤矿的全灌浆岩螺栓。塔巴斯煤矿是伊朗第一个综合机械化煤矿，每年生产150万吨煤炭。矿井通过长墙和房间和支柱方法提取煤。道路的宽度宽度为4.5米，高度为3.5米。岩石的现场调查和岩土工程特征表明，岩体弱，需要适当的支撑系统。道路由一个主要断层区域交叉。对于设计的道路，考虑了四种图案（具有180和195 kn的转印承载力的两种类型的螺栓）。 FLAC分析表明，13个螺栓2.4m，24m没有Flexi螺栓4-M图案优于断层区域内的其他图案。通过仪器评估最佳模式，在具有仪器读数的数值模拟结果之间存在妥协，例如Telltales，Sonic扩展仪和应变计岩螺栓。因此，数值和现场方法之间存在鼓舞人心的一致性。

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