为解决厚松散层既有立井井筒地面注浆加固技术难题，以山东巨野矿区郭屯煤矿厚松散层偏斜井筒地面注浆治理为工程背景，针对井筒偏斜特征，采用现场钻孔压水试验与地面高压注浆试验方法，分析不同注浆深度与注浆层段受注点试压水与注浆表头最大压力比值，获得了受注点注浆压力与该点静水压力比值，并得到了厚松散层主含水层的可注性及其注浆技术参数，最终确定了厚松散层偏斜井筒地面注浆治理方案设计原则与施工方案；研发了单井多层段注浆新型套管，形成了“注-泄”联合间歇注浆加固技术。研究结果表明：①当注浆压力达到静水压力的2.0～2.5倍时，水泥浆可顺利注入；②松散层深度越深，地层的单位吸浆量越小，同一注浆段，在相同压力情况下，压水流量是注浆量的2倍；③按注浆试验确定的设计注浆量与实际注浆量误差在27％以内，随着注浆孔的注浆，其邻近泄压孔出现孔管口出水、孔管口内返浆和串浆等现象，实现了泄压目的，且对邻近既有井筒受力变形影响较小；④注浆后，主、副、风井井筒表土段井壁淋水明显减小，且有回正的趋势。研究成果在郭屯煤矿厚松散层偏斜井筒地面高压注浆治理工程得到了成功应用。

In order to solve the technical problem of ground grouting reinforcement of existing vertical shaft in thick loose layer,taking the ground grouting treatment of deflected shaft in thick loose layer of Guotun Coal Mine in Juye Mining Area of Shandong Province as the engineering background,and according to the shaft deflection characteristics of Guotun Coal Mine,a field borehole water pressure test and ground high-pressure grouting test were used to analyze the ratio of test pressure water at the injection point of different grouting depths and grouting intervals to maximum pressure of grouting head in different grouting depth and grouting layer section,and obtained the ratio of grouting pressure at injection point to hydrostatic pressure at this point,and the injectability and grouting technical parameters of the main aquifer in the thick loose layer are obtained. Finally,the design principle and construction scheme of the ground grouting treatment scheme for the deviated shaft in the thick loose layer were determined. Moreover,a new type of single well multi-layer grouting casing was developed,and the “injection discharge” joint intermittent grouting reinforcement technology was formed. The results show that：① when the grouting pressure reaches about 2.0-2.5 times of the hydrostatic pressure,the cement slurry can be injected smoothly; ② the deeper the loose layer is,the smaller the unit slurry suction volume of the stratum is; in the same grouting section,under the same pressure,the water pressure flow is twice of the grouting amount; ③the error between the designed grouting amount and the actual grouting amount determined by grouting test is within 27%. With the grouting of the grouting hole,the phenomenon of water coming out of the hole orifice,slurry returning and slurry flowing in the hole pipe orifice appeared in the adjacent pressure relief hole,which realized the purpose of pressure relief,and had little influence on the stress deformation of the adjacent existing shaft; ④after grouting,the water inrush on the surface soil section of the main shaft,auxiliary shaft and air shaft decreases obviously,and there is a tendency to return to normal. The research results have been successfully applied in the surface high-pressure grouting treatment project of the deflected shaft in the thick loose layer of Guotun Coal Mine.