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在深井开采过程中,地热是导致井下热害的主要原因。热量源源不断地从巷道围岩传递到井下工作面,使工作面气候环境恶化,危害矿山生产安全。本次研究采用合理的地温监测技术,研究深井矿山围岩地温场分布规律,为矿山进行热源分析、地温预测、通风降温等技术研究提供了重要依据。 相似文献
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采用国标建议的实验装置,对普通针刺毡滤料和高密面层针刺毡滤料的性能进行系统实验与研究,得出了滤料阻力性能的数据.结果表明:高密面层滤料体现了表面过滤的特征,无论在洁净过滤阶段、老化阶段还是稳定过滤阶段都具有较低的阻力值、缓慢的阻力上升速度、较长的过滤周期、较高的粉尘剥离率.因此高密面层滤料结构优于普通滤料. 相似文献
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Hongtoushan copper mine was studied by analyzing the type of heat source, the calculation method about thermal releasing in
stope, thermal transfer between rock and air, distribution of temperature in stope were formulated. With CFD (Computational
Fluid Dynamics, DFD) simulation and Fluent software, geometrical model of a stope was built, boundary conditions was initialized,
then the temperature distribution, velocity and pressure field, concentration of oxygen and CO2 of air were simulated. In order to validate the simulation result, the parameters of the stope were measured with meter,
and comparing with the data of simulation. The result shows that the data of measuring and simulating are compatible. According
to the distribution of temperature and velocity, some ways such as flow angle and flow velocity are put forward, simulation
and parameter optimization made also, a satisfied result is acquired. The conclusion can be used on ventilation designing
and stope improving.
Supported by National Scientific and Technological 11th Five-Year Plan of China(2006BAK05B04-03) 相似文献
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利用静电纺丝技术制备了不同纺丝时间的聚对苯二甲酸乙二醇酯(PET)纳米纤维膜,将PET纳米纤维膜、热熔型胶膜及涤纶针刺毡通过热处理复合,制备了三明治结构的PET纳米纤维膜/涤纶针刺毡过滤复合材料,利用SEM分析了PET纳米纤维膜形貌,通过TGA确定了PET纳米纤维膜的热处理条件,对不同纺丝时间的PET纳米纤维膜/涤纶针刺毡过滤复合材料透气性能、过滤性能进行了研究。结果表明:纺丝液浓度为18%,纺丝电压为15 kV,接收距离为21 cm,环境温度为13℃,环境湿度为20%条件下得到的PET纳米纤维膜纤维平均直径为514.95 nm;PET纳米纤维膜与涤纶针刺毡的复合温度为115℃;随纺丝时间的增加,PET纳米纤维膜的密度增加,PET纳米纤维膜/涤纶针刺毡过滤复合材料对颗粒物的过滤效率增大,透气性下降,当密度为3.86 g/m2时,PET纳米纤维膜/涤纶针刺毡过滤复合材料的过滤性能最优,其品质因子QF明显优于常规涤纶针刺毡,对1 μm以下颗粒物的过滤效率均高于93%,效率提高了58%以上,表现出优异的过滤性能。 相似文献
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