深表土钻井井筒内套井壁结构试验研究

Experimental Study on Inner Shaft Linings Structure of Drilling Shaft in Deep Alluvium

针对江淮地区某煤矿井筒破裂的修复问题,根据相似理论,采用模型试验方法研究了内套井壁的极限承载力。实验结果表明:内套井壁模型试件的极限承载力最小值达到了25.3 MPa,远高于当地地层的压力值,进而证明了内套井壁修复方法的可行性。

Aiming at the repairing problem of the shaft rupture of coal mines in Jiang Huai area, the model test was conducted to study the ultimate bearing capacity of the inner shaft lining based on the similarity theory. The results show that ultimate bearing capacity of the inner model is much higher than that of the local formation pressure value, its minimum value reaches 25.3 MPa, and the feasibility of the inner wall repairing method is proved.