治理深部软岩巷道围岩蠕变失稳是实现安全采掘作业的必要前提，以顾桥煤矿为工程背景，采用实验测试、理论分析、工业性实验、现场监测等方法进行深入研究。结果表明：顾桥矿深部巷道围岩强度较弱，浸水后容易导致长期强度、弹性模量、黏聚力、内摩擦角较大幅度下降，岩石软化、底板松动圈持续扩展以及围岩整体稳定性降低；围岩内外承载结构的特殊形状近似竖向椭圆。以改善承载结构的稳定性为基点，提出了底板深孔注浆技术，底板深孔注浆可以快速改变承载结构形状，将不稳定的近似竖向椭圆形状转变为稳定性很高的近似圆形形状。

Controlling the creep instability of the surrounding rock of the deep soft rock roadway is a necessary prerequisite to achieve safe mining operations. This paper takes Guqiao Coal Mine as the engineering background, uses experimental testing, theoretical analysis, industrial experiments, on-site monitoring and other methods to conduct in-depth research. The study results show that the strength of the surrounding rock of the deep roadway in Guqiao Coal Mine is weak, and it is easy to cause a significant decline in long-term strength, elastic modulus, cohesion and internal friction angle after immersion, rock softening, continuous expansion of floor loose zone and reduction of overall stability of surrounding rock; the special shape of internal and external bearing structure of surrounding rock is defined: approximate vertical ellipse, based on improving the stability of the bearing structure, the deep hole grouting technology of the bottom plate is proposed. The deep hole grouting of the bottom plate can quickly change the shape of the bearing structure and change the unstable approximate vertical ellipse shape into the approximate circular shape with high stability.