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在复杂的矿山地质条件下进行掘进工作的实践证明,采用预注浆封堵含水岩层涌水已成为有效的方法之一。当前,地面预注浆和工作面预注浆已在苏联顿涅茨矿区的井筒施工中得到广泛应用.钾盐矿井对井筒施工结束后的剩余涌水量是有特殊要求的。因此,在掘进井筒时,要求运用专门的堵水方法。根据复杂地质条件下的井筒掘进的经验总结和分析相应的设计资料表明:掘进穿过含水层的时间约占井筒总工期的33％,所以要求采用能控制水的施工方法.因此,井筒掘进的技术经济指标在很大程度上取决于注浆工程的工艺与技术完善的程度.评定注浆工程技术水平的主要指标是:含水岩层的等级(按其渗透性大小评定),作为现今选择
The practice of tunneling under complicated mine geological conditions has proved that the use of pre-grouting to block water inflow in an aquifer has become an effective method. At present, ground pre-grouting and face grouting have been widely used in the wellbore construction of the Donetsk mining area in the Soviet Union.The potash mine has special requirements for the residual water inflow after completion of wellbore construction. Therefore, when drilling wellbore, requires the use of special water blocking method. Based on the experience of borehole excavation under complicated geological conditions and the corresponding design data, it is shown that the time required for tunneling through the aquifer accounts for about 33% of the total length of the wellbore, so a construction method capable of controlling water is required. Technical and economic indicators are largely dependent on the extent of the grouting engineering technology and technology improvement.The main indicators for assessing the grouting engineering technology level are: the grade of water-bearing strata (according to its permeability), as the current choice