The used approximately dimensioning to approximate the mass extraction ratio guarantees stable cavities for the time of stoping and the storage of teh residual brine but consider not the behaviour of the safety layers and their mechanical integrity 所使用的近似尺寸接近质量萃取率，从而确保了回采和储存残余卤水时空穴的稳定性，但安全层及其设备的完整性未考虑在内。
