中文摘要：

为分析巷道掘进过程中围岩松动圈的发育过程和最大范围,采用最小二乘拟合的数学方法对观测数据进行了分析,得出：巷道掘进时,距离掘进端头10 m以外的围岩基本处于稳定状态,顶、底板和两帮松动圈的范围从大到小依次为：顶板、底板、两帮,松动圈最大值分别为：顶板4.4 m,底板3.7 m,右帮2.6 m,左帮2.5 m。分析结果对巷道掘进中的重点支护具有借鉴意义。

英文摘要：

As the development process analysis of surrounding rock during tunnel excavation in loose zone and maximum range, has carried on the analysis to the observation data using the mathematical method of least squares fitting, the tunnel surrounding rock excavation, distance outside the end of the basic 10m is in stable state, the top and bottom and two sides of the range of the loose circle from big to small in order the roof, floor and two sides, the maximum value of the loose circle respectively： 4.4 m floor roof; 3.7 m; right for 2.6 m ; the left side of 2.5 m, with reference to the key support in tunnelling.