To verify the adaptability and effectiveness of inclined digging technology in the rectification of a deviated rooting mine shaft tower in East China

the plastic zone around the inclined hole

the mechanism of the technology

and the influence of various factors on the rectification effect are studied by theoretical analysis

numerical simulation and field measurement. The results show that the radius of the plastic zone is proportional to the diameter of the hole and the stress around circle hole

and it increases with the depth of drilling hole. Drilling can effectively reduce the stress within a certain range of the digging hole

so that the soil around continuously collapses

and then the difference between external load on drilling side and the shaft lining can be reduced

which produces a stress difference with the opposite to promote the shaft tower back to correct. Based on the orthogonal experiment design

we find that the most important factor to influence the deviation is the row width of the drilling

and depth

diameter and the distance between drilling row and shaft centreline. Last

according to the study results

the optimal deviation scheme is designed by long term monitoring of the shaft tower deflection and lining stress

we conclud that this drilling technology is effective in the deviation rectification of rooting mine shaft tower.