自贡盐卤开采,特别是用水溶法开采岩盐,引起了该区工程地质环境明显变化。1978年以来,自贡地区弱震频繁,这个年份正与该市大安盐厂深井注水、溶盐水大量漏失的时间相吻合。当时,有的开采井地下水位抬高达65.59m,卤水淡化,矿化度降低。直至1985年3月29日自贡发生了4.8级的地震。凡此种种,说明自贡的地震是与盐卤的开采、深井注水密切相关的。为了保证环境不继续恶化,必须深入的开展工程地质研究工作,有计划地进行国土开发与整治。 Zigong salt brine mining, especially the mining of rock salt water-soluble method, caused a significant change in the engineering geological environment in the area. Since 1978, the earthquakes in Zigong are frequent and this year is coinciding with the time of deep well water injection and large amount of dissolved salt water loss of Daan Salt Plant in this city. At that time, some wells raised the groundwater level 65.59m, brine desalination, salinity decreased. Until March 29, 1985, a magnitude 4.8 earthquake occurred in Zigong. All these indicate that the earthquake in Zigong is closely related to the exploitation of salt brine and deep well watering. In order to ensure the environment does not continue to deteriorate, we must carry out in-depth study of engineering geology and carry out land development and remediation systematically.