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首页> 外文会议>2007采矿科学与安全技术国际学术会议 >Numerical Modeling of Cross Measure Borehole Gas Drainage
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Numerical Modeling of Cross Measure Borehole Gas Drainage

机译：跨井眼瓦斯抽采的数值模拟

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The current practice of draining gas from coal measures is drilling, both in coal seams as well as in the surrounding stratafication. The effectiveness of the drainage operation changes from location to location because of the varying geological conditions. A number of factors influence the success of gas drainage. Intrusions, faults, and folds can substantially influence the effectiveness of gas draining operations. In this paper, the effects of gas drainage on gas pressure in coal seams and the gas flow process induced by gas drainage in the coal seam is numerically studied by using a gas flow coupled Rock Failure Process Analysis code. The study has shown that the numerical mode employed in this paper is capable of realistically simulating the complex process of methane emission and flow around longwall panels in coal mines and can guide the decision about how to take a measure to deal with the coal methane in the coal seam and what mining methods are employed to excavate the coal seam. The modeling approach provides a basis for evaluating methane inflow and control measures. The successful reproducing of the experimentally and in-situ observed gas drainage phenomena with a numerical method implies that our understanding of the mechanisms of gas drainage to control outbursts has reached a more reasonable level, which in turn will help us to make further progresses in an better understanding of the mechanism of instantaneous outbursts and controlling and preventing the occurrence of instantaneous outbursts induced by underground mining. This approach will result in increased safety for mine workers in longwall mines by improving our ability to predict methane inflows and enabling more effective design of methane control measures. The pursuit of research on this topic may lead to more certain and better controlled enhancement of gas flows in methane drainage schemes.
机译：目前，从煤层中排放气体的做法是在煤层以及周围地层中进行钻探。由于地质条件的变化，排水作业的有效性因地点而异。许多因素影响瓦斯抽采的成功。侵入，断层和褶皱会严重影响瓦斯抽采作业的效率。本文利用气体流动耦合岩石破坏过程分析法，对瓦斯抽放对煤层瓦斯压力的影响以及瓦斯抽放引起的瓦斯流动过程进行了数值研究。研究表明，本文所采用的数值模式能够真实模拟煤矿长壁板周围甲烷排放和流动的复杂过程，并可以指导如何采取措施处理煤矿瓦斯的决定。煤层以及采用何种采矿方法进行煤层开挖。该建模方法为评估甲烷流入量和控制措施提供了基础。用数值方法成功再现了在实验和现场观察到的瓦斯抽采现象，这意味着我们对瓦斯抽采控制突出的机理的理解已经达到了更合理的水平，这反过来将有助于我们在煤层气开采方面取得进一步的进展。更好地理解瞬时突出的机理，控制和防止地下采矿引起的瞬时突出的发生。通过提高我们预测甲烷流入量的能力并实现更有效的甲烷控制措施设计，这种方法将为长壁矿井的煤矿工人提高安全性。对这一主题的研究的追求可能导致甲烷排放方案中气流的确定性和更好的控制性提高。

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