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煤炭部于1983年6月在安徽省淮南市召开了两淮地区冻结井复合井壁新技术鉴定会。参加会议的有来自煤炭、冶金系统以及高等院校等五十多个单位,百余名科技人员。在两淮地区兴建的井筒所穿过的表土层厚度从几十米到三百余米,工程地质及水文地质都较复杂。为了适应新建矿区表土层日益深厚的变化,两淮矿区七十年代以后建设的井筒,均采用了冻结法施工双层钢筋混凝土井壁。这种井壁的结构,由于受两层混凝土施工中的温差(从-5～15℃至40～50℃) 影响,致使井
In June 1983, the Ministry of Coal held a new technology appraisal meeting for compound wellbore in freezing wells in Huai’an, Anhui Province. Participants in the conference included more than 50 units from coal, metallurgical systems, colleges and universities, and more than 100 scientific and technical personnel. The thickness of the surface soil layer penetrated by the wellbore built in the two Huai area is from tens of meters to 300 meters, and the engineering geology and hydrogeology are more complicated. In order to adapt to the increasingly profound changes in the topsoil of the newly-built mining areas, the wellbore constructed after the 1970s in the Huaibei Mining Area has adopted a freezing method to construct a double-deck reinforced concrete wall. The structure of this well wall is affected by the temperature difference (from -5 to 15°C to 40 to 50°C) in the two-story concrete construction, resulting in the well