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为了加快井筒建设速度,井壁施工最好采用速凝混凝土。使用这种混凝土时,浇灌混凝土拌合物2～4小时之后即可拆掉模板,并且在混凝土浇灌完毕后经1～1.5小时便可以从模板底部托盘下进行抓岩。除了上述工艺方面的优点之外,速凝混凝土还具有高密度、不透水性及抗锈蚀性。现时在进行混凝土施工中广泛使用各种化学添加剂,以调节结构形成过程,加速混凝土凝结,改善其质量指标,使混凝土具有预期的性能。根据全苏矿井建设组织与机械化科学研究所与顿涅茨克建井公司,伏罗希洛夫格勒建井公司共同完成的试验室研究及工业性试验,编写了建井巷道支架施工的准备和应用混凝土及砂浆的规程,目的
In order to speed up the construction of wellbore, shaft construction is best to use quick-setting concrete. When using this type of concrete, the concrete mix can be removed 2 to 4 hours after pouring the concrete mixture and the rock can be grabbed from under the tray at the bottom of the form after 1 to 1.5 hours of watering of the concrete. In addition to the above process advantages, quick setting concrete also has high density, water impermeability and corrosion resistance. At present, various chemical additives are widely used in concrete construction to adjust the structure formation process, speed up the setting of concrete, improve the quality indicators and make the concrete have the expected performance. According to the laboratory research and industrial experiments jointly conducted by the All-Soviet Mine Construction Organization and the Institute of Mechanized Science, the Donetsk Well Construction Company and the Voroshilovgrad Construmentation Company, preparations were made for the construction of mine roadway supports And the application of concrete and mortar rules, purpose