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Operational Management of Underground In-Seam Drilling Sites

机译：地下煤层钻井网站的运营管理

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Operations in an underground drill site have to co-exist within the mine's ventilation and operational system. The space requirements of a drilling operation have to be adapted to the limitations provided in available site space, which is usually defined by standard mining operations and geotechnical influences. These limitations affect borehole design, equipment positioning in the site layout and possible interactions with mining equipment and services such as water and power supply. The ventilation requirements for drill sites and the means employed vary with depth of the site, space and likely presence of gas. All drilling operations provide a particular service for the mine and in each case, drilling must operate in a manner which controls all gas, water and cuttings returning from the borehole. The various standpiping systems employed have evolved under differing influences and must cater for conditions during and after the drilling operations. The influences that gas content, pressure and flow, rib stability, cleat direction, borehole length, potential water pressure and flow have on a mine's operation and ventilation systems have to be considered in the design of standpipe length, diameter and fittings. Past history has a strong influence on common practice while worst case effects of a possible in-hole event should be catered for. This paper describes the early drilling systems and their limitations in ventilation and gas management. The drill site dimensions and set-up are discussed in the context of roadway conditions, equipment layout, ventilation and logistics. The use of standpiping to control all returns from the borehole is illustrated by referring to likely scenarios in a drilling site to achieve the most effective sealed depth to accommodate the worst case possibility of intersecting high pressure gas or water during the drilling operation. Practices to allow gas drainage in the return airway of a panel are described.
机译：地下钻探网站的操作必须在矿山通风和运营系统内共存。钻井操作的空间要求必须适应可用现场空间中提供的限制，这通常由标准采矿操作和岩土工程影响。这些限制会影响钻孔设计，站点布局的设备定位以及与采矿设备和服务的可能的交互，如水和电源。钻头的通风要求和使用的手段随着地点的深度而变化，空间和可能存在气体。所有钻孔操作都为矿井和在每种情况下提供特定的服务，钻孔必须以控制所有气体，水和切割从钻孔返回的方式操作。所采用的各种安装系统在不同的影响下进化，并且必须在钻井操作期间和之后迎合条件。气体含量，压力和流动，肋稳定性，螺旋方向，钻孔长度，潜在水压和流动的影响必须考虑在立管长度，直径和配件的设计中所在的操作和通风系统。过去的历史对共同做法有很大的影响，而可能的孔孔事件的最坏情况效果应该迎合。本文介绍了早期钻井系统及其在通风和气体管理中的局限性。在道路条件，设备布局，通风和物流的背景下讨论了钻头现场尺寸和设置。通过参考钻井部位中的可能场景来示出使用立管来控制来自钻孔的所有返回，以实现最有效的密封深度以在钻井操作期间容纳与高压气体或水交往高压气体或水的最坏情况。描述了在面板的返回气道中允许气体排水的实践。

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