针对厚松散层薄基岩地层井筒偏斜综合治理技术难题，以山东巨野矿区郭屯煤矿偏斜井筒地面注浆治理工程为背景，基于井筒松散层段偏斜与竖向压缩变形共存且向非对称开采工作面方向偏斜的全新破损特征，揭示郭屯煤矿井筒偏斜与竖向压缩变形机理，分析认为该2种特征分别是煤层非对称开采引发的底含非均匀疏水固结沉降叠加作用下地层水平倾覆推力和竖向附加力所致。本着确保安全、不停产治理的原则，制定了在役偏斜井筒不停产地面注浆综合治理方案，研发了系列井筒偏斜综合治理技术：(1)保护在役井筒“泄压-预警”双控地面高压注浆技术；(2)厚松散层单孔多层段注浆新型套管与施工工艺；(3)厚松散层地面注浆参数工程化确定方法；(4)在役井筒不停产运营下深孔高压注浆治理预警技术。综合监测结果表明：郭屯煤矿主、副、风3个偏斜井筒治理工程注浆过程中严格按照厚松散层薄基岩条件下偏斜井筒不停产综合治理技术进行实施，完成注浆孔钻探工程量31 026.8 m，注浆量达到35 536.66 m3，实现了矿井不停产注浆治理；治理后井筒向北向西不再继续偏移，主井井筒注浆期井口处向北和向西偏斜量分别减小12 mm和18 mm，副井井筒井口处向北和向西分别减小13 mm和41 mm，注浆结束1 a内井筒整体偏斜量仍继续减小并有回正趋势，且井筒周边下沉速率减缓，确保了井筒运营安全。研究成果在郭屯煤矿厚松散层薄基岩地层偏斜井筒地面高压注浆治理工程得到了成功应用，为今后在类似工程中应用提供参考依据和工程经验。

Aiming at the technical problems of comprehensive treatment of shaft deflection in thick loose bed and thin bedrock strata, taking the ground grouting treatment engineering of the deflected shaft in Guotun Coal Mine in Juye Mining Area, Shandong Province as the background, new damage characteristics based on the coexistence of deviation and vertical compression deformation of the loose layer section in the shaft and the deviation to the direction of asymmetric mining face, the mechanism of shaft deflection and vertical compression deformation in Guotun Coal Mine is revealed. The analysis shows that the two characteristics are respectively caused by the horizontal overturning thrust and vertical additional force of the stratum under the superposition action of the non-uniform hydrophobic consolidation settlement of the bottom aquifer caused by the asymmetric mining of the coal seam. In line with the principle of ensuring safety and non-stop production treatment, a comprehensive treatment plan for ground grouting of in-service deflected shaft without stopping production has been formulated, and a series of comprehensive treatment technologies for deflected shaft have been developed: ① The dual control ground high-pressure grouting technology of “pressure relief and early warning” for protecting the shaft in service; ② New casing and construction technology for single hole and multi-layer grouting in thick loose layer; ③ Engineering determination method of ground grouting parameters in thick loose layer; ④ Early warning technology of deep hole high-pressure grouting treatment under the condition of continuous production operation of the in-service shaft. The comprehensive monitoring results show that during the grouting process of the main, auxiliary and wind deflected shaft treatment projects of Guotun Coal Mine, the comprehensive treatment technology of continuous production of the deflected shaft under the condition of thick loose bed and thin bedrock was strictly followed, and the drilling quantity of the grouting hole was 31 026.8 m, the grouting quantity reached 35 536.66 m3, realizing the grouting treatment of the shaft without stopping production. After the treatment, the shaft no longer deviates from north to west, during the grouting period of the main shaft, the deviation from the wellhead to the north and the west decreased by 12 mm and 18 mm respectively, and the deviation from the wellhead of the auxiliary shaft to the north and the west decreased by 13 mm and 41 mm respectively. Within one year after the completion of the grouting, the overall deviation of the shaft continues to decrease and has a positive trend, and the sinking rate around the shaft slows down, which ensures the safety of the shaft operation. The research results have been successfully applied in the ground high-pressure grouting treatment project of the deflected shaft in thick loose bed and thin bedrock strata of Guotun Coal Mine, providing reference and engineering experience for the future application in similar projects.

0 引言
1 工程概况
2 井筒偏斜特征与机理分析
2.1 井筒偏斜特征分析
2.2 井筒偏斜机理分析
3 偏斜井筒不停产地面注浆综合治理方案
3.1 方案设计原则
3.1.1 布孔原则
3.1.2 注浆段确定原则
3.1.3 注浆量确定原则
3.1.4 注浆压力确定原则
3.1.5 注浆孔施工原则
3.2 注浆钻孔深度
3.3 注浆钻孔注浆层位划分
3.4 注浆钻孔平面布置
4 综合治理关键技术
4.1 厚松散层地面注浆参数工程化确定方法
4.2 保护在役井筒“泄压-预警”双控地面高压注浆
4.3 厚松散层单孔多层段注浆新型套管与施工工艺
4.4 在役井筒不停产运营下深孔高压注浆治理预警值确定方法
5 井筒偏斜治理效果评价
5.1 注浆量
5.2 偏斜纠正量
5.3 地表沉降量
5.4 井筒沉降量
5.5 光纤监测数据
6 结论