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首页> 外文会议>International Conference on Earth Science, Mineral, and Energy >Optimizing maximum unsupported span value by Q - system to enhance production in mining operation, case study Antam Pongkor underground gold mine
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Optimizing maximum unsupported span value by Q - system to enhance production in mining operation, case study Antam Pongkor underground gold mine

机译：优化Q - 系统的最大不受支持的跨度值，以增强采矿业务的生产，案例研究安达尔庞克尔地下金矿

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The stability of tunnels in underground mines is an important factor in mining production which must be considered to ensure productivity and safety. At the Antam Underground Gold Mine, the production cycle begins with drilling an explosive hole and then filling the explosives. After that, the tunnel is blasted and ore is transported to the stockpile. The activities are continued by supporting the tunnel then return to the beginning of the cycle, which is drilling activity. Before this study was conducted, drilling was carried out using a 3 meter drilling rod. The blasting outcomes from the drilling were only about 2.0-2.3 m or less than 85% drilling depth. Among the various rock conditions that affect tunnel stability, the width and height dimensions are important design factors. This study aims to optimize drilling-blasting activities by considering Maximum Unsupported Span (MUS) using a Q system by replacing the diameter of drilling bit and lengthening the size of the drilling rod. By applying MUS analysis and operational considerations, MUS values were obtained that matched the characters in certain site. From data collection in the field, MUS values varied from 1.8 to 8 m depending on the characteristics of the rock mass. By observing the mining operation factor, the maximum range could be proposed in 4.2 m length and changed the drilling bit to 64 mm. Although the drilling time was longer but the outcomes of the forward meter of drilling blasting were more than 80%, which was 4 of 4.2 m. By utilizing MUS and considering mining factors, productivity could be improved and safety was guaranteed.
机译：地下矿山隧道的稳定性是采矿生产中必须考虑的重要因素，以确保生产力和安全。在地下金矿的安踏地下金矿，生产周期从钻出爆炸洞，然后填充炸药。之后，隧道被喷射，矿石被运输到储存。通过支持隧道继续进行活动，然后返回周期开始，这是钻探活动。在进行这项研究之前，使用3米钻杆进行钻孔。钻孔的爆破结果仅为2.0-2.3米或小于85％的钻孔深度。在影响隧道稳定性的各种岩石条件中，宽度和高度尺寸是重要的设计因素。本研究旨在通过替换钻头的直径并延长钻杆的尺寸来实现使用Q系统的最大不支持的跨度（MUS）来优化钻探爆破活动。通过应用MUS分析和操作考虑，获得了Qual值，匹配某些网站中的字符。从现场的数据收集中，MUS值根据岩石质量的特性，从1.8到8米变化。通过观察挖掘操作因子，最大范围可以在4.2米长的4.2米长，并将钻孔钻头改为64毫米。虽然钻井时间较长，但钻孔爆破的前向仪表的结果超过80％，为4.2米的4％。通过利用MUS并考虑采矿因素，可以提高生产力，保证安全性。

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