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中文摘要：
基于煤矿井壁破裂事故频发的现状,介绍了利用表土层注浆加固法的“缓释”和“抑制”双重效应治理井壁破裂的机理,并对该方法的工程应用情况进行了分析与探讨.研究表明,表土层注浆加固井筒周围的含水层能够有效改善井壁的受力状态,缓释和抑制井壁的竖直附加力,深部的应力缓释效果最明显,向浅部依次递减.注浆过程中,地面变形与井壁受力实测趋势基本吻合.加固后,土的黏聚力及内摩擦角提高了1倍,压缩系数仅为注浆前的1/3～1/4,整个井筒竖向附加压应变减少的平均值达332.71με,作用在井壁上的垂直荷载显著减少.因此,通过地面注浆加固井壁周围的表土层,可以推迟井壁破坏的时间,达到防治井壁破裂的目的,有利于确保井壁的安全.
英文摘要：
Based on frequent accidents of shaft lining rupture,the mechanism of grouting into topsoil to reinforce the surrounding soil and to prevent shaft lining from fracturing is expounded.At the same time,the application of this technique in curing an auxiliary shaft lining rupture is analyzed and discussed in detail.The results show that this technique can effectively improve the stress condition of shaft lining and the vertical additional stress of the shaft lining be released and restrained.The stress release effect is most evident in the deep of the shaft lining and changes in a descending order from the deep to the top.Ground deformation almost agrees with the measured stress trend of the shaft lining during the grouting.The adhesive force and internal friction angle of soil reaches two times as great as it was before,but the compression coefficient reduces 3~4 times.At the same time the average value of the whole vertical additional compressive strain decreaseds by 332.71 με and the vertical load acting on the shaft lining decreases evidently after reinforcement.So this technique can prevent and cure the rupture and ensure the safety of shaft lining by means of postponing the rupture time.
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