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首页> 外文会议>SME annual meeting and exhibit 2008 : New Horizons-New Challenges >SIMULATION OF SPONTANEOUS HEATING IN LONGWALL GOB AREA WITH A BLEEDERLESS VENTILATION SYSTEM
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SIMULATION OF SPONTANEOUS HEATING IN LONGWALL GOB AREA WITH A BLEEDERLESS VENTILATION SYSTEM

机译：无采风系统模拟龙骨采空区自发加热

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摘要

Although it is only utilized in a few U.S. longwall mines, a bleederless ventilation system can be an effective spontaneous combustion control method in mines with a demonstrated history of spontaneous combustion. In order to provide insights for the optimization of bleederless ventilation systems for U. S. underground coal mines, a computational fluid dynamics (CFD) study was conducted to model the spontaneous heating in longwall gob areas with a bleederless ventilation system. A single longwall panel with a bleederless ventilation system was simulated, and typical ventilation data for a longwall mine was used in the simulations. The permeability and porosity profiles for the longwall gob were estimated using a geotechnical model and were used as inputs for the CFD modeling. The effects of gob permeability and resistance of the collapsed entries on the spontaneous heating were studied. The effectiveness of nitrogen injection to prevent spontaneous heating in the gob was also examined.
机译：尽管仅在少数美国长壁矿井中使用，但无泄气通风系统在具有自燃历史的矿井中可以是有效的自燃控制方法。为了为优化美国地下煤矿的无底气通风系统提供见识，进行了计算流体力学（CFD）研究，以模拟无底气通风系统在长壁采空区自发加热。模拟了具有无排气通风系统的单个长壁面板，并且在模拟中使用了长壁矿井的典型通风数据。使用岩土模型估算长壁采空区的渗透率和孔隙率曲线，并将其用作CFD模型的输入。研究了采空区渗透率和塌陷阻力对自发加热的影响。还检查了氮气注入防止料滴自热的有效性。

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