摘要：Disturbance effect is one of the important factors for wind damage to large cooling *** studies on the wind-induced interference of cooling tower groups are aimed at the same size and the lack of wind-induced interference effects between cooling towers of different *** the background of the additional cooling tower project at Shandong Luxi Power Plant in China,the rigid body pressure wind tunnel test is carried out to obtain 194 conditions for the three combinations of the existing four-tower combination(small size),the new two-tower combination(large size)and the six-tower combination surface wind pressure *** simulation of the surrounding flow field of the cooling tower group with the most unfavorable interference condition of the six-tower combination is conducted using the computational fluid dynamics(CFD)*** on this,the characteristics of the average and pulsating wind pressure distribution of the cooling tower surface under the six-tower combination are mainly studied,and the load interference coefficients of the large-sized cooling tower and the small-sized cooling tower under the three tower group combinations are *** velocity flow field and vorticity changes around the cooling tower group at unfavorable wind angles are analyzed,and the wind-induced interference mechanism between cooling tower groups of different sizes is mainly *** shows that the interference effect between such cooling tower groups of different sizes is much larger than that of cooling tower groups of the same size,which is specifically manifested as the enhancement effect of small-sized cooling towers and the shielding effect of large-sized cooling *** interference coefficient of large-sized cooling tower groups increases by 28%,and the interference coefficient of small-sized cooling tower groups decreases by 6.4%.The airflow acceleration caused by the pinch effect between small-sized cooling tower groups has an a

摘要：特厚煤层上下区段综放工作面两次开采形成的强采动应力易诱发煤与瓦斯突出、冒顶、塌陷等灾害,开展强采动应力演化和作用特征研究是关键。本文主要通过建立几何相似比1:100的物理模型,研究采动应力演化特征、强采动巷道围岩失稳机理和高应力卸压方法。实验结果显示上下区段综放面两次开采过程中,特厚煤层综放强采动巷道煤柱帮均为所监测围岩区域中最剧烈影响区;结合室内相似材料物理模型和现场钻孔应力监测结果比较,验证了特厚煤层综放开采利用窄煤柱布置方法进行高应力卸压的可行性。研究结果可为特厚煤层开采中区段煤柱设计、巷道布置,支护方案等优化确定提供一定的理论参考基础。