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光卤石围岩潮解改变了巷道的断面形状、降低了围岩强度,导致金属类支护结构腐蚀甚至失效,给井巷围岩稳定带来安全隐患。为抑制可溶性钾盐井巷潮解,利用双模理论和室内实验分析了光卤石围岩潮解机理及影响因素,探讨了矿井通风相对湿度、风速对光卤石围岩潮解的影响,得到以下主要结论:通风湿空气水蒸气分压力与湿巷壁潮解盐液表面水蒸气压力差是围岩潮解的驱动力;通风湿空气相对湿度和风速是光卤石围岩潮解的重要影响因素;当通风干球温度控制在21℃~23℃时,光卤石潮解的临界湿度介于53%~67%之间;将通风相对湿度控制在53%以下、在满足生产需要的前提下减小通风风速,有利于抑制光卤石围岩的潮解破坏。
Carbamide wall rock tidal solution changed the tunnel section shape, reducing the surrounding rock strength, leading to corrosion or even failure of the metal support structure, which brings potential safety hazard to the surrounding rock of well lane. In order to restrain the deliquescence of soluble potassium salt wells, the dipping mechanism and influential factors of the carnallite surrounding rock were analyzed by dual-mode theory and laboratory experiments. The influence of relative humidity and wind speed of the mine ventilation on the deliquescence of carnallite surrounding rock was discussed. The main conclusions as follows : Ventilation wet air vapor partial pressure and wet alley deliquescence Saline liquid surface water vapor pressure difference is the driving force of surrounding rock deliquescence; Ventilation wet air relative humidity and wind speed are important factors influencing dolomitic rock tide deliquescence; When the ball temperature is controlled from 21 ℃ to 23 ℃, the critical humidity of carnallite deliquescence is between 53% and 67%; the relative humidity of ventilation is controlled below 53%, and the ventilation air velocity is reduced under the premise of meeting production needs, It is helpful to restrain the deliquescence of carnallite wall rock.