针对煤矿深立井井筒过突出煤层群时的支护难题，提出采用钢纤维混凝土井壁结构；首先，通过配制试验得到井壁高性能混凝土的基准配合比，研究不同钢纤维掺入率下混凝土的力学性能；然后，以丁集煤矿第二回风井井筒揭煤处的支护工程为背景，基于相似理论，进行不均匀荷载下的井壁模型试验研究。结果表明：高性能钢纤维混凝土具有良好的力学性能，当钢纤维掺量（体积分数）为0.4%时，高性能钢纤维混凝土的抗压强度、抗拉强度、抗折强度比基准混凝土分别提高5.3%、37.5%、52.5%；在不均匀荷载作用下，高性能钢纤维混凝土井壁结构承载力比基准混凝土井壁提高约13.2%~15.6%；高性能钢纤维混凝土井壁的环向应变为（−230.0~−587.2）×10⁻⁶，远小于钢纤维混凝土极限应变值，说明该新型井壁结构是安全可靠的。

Aiming at the support problems when the coal mine deep vertical shaft passes over the outburst coal seam group, the use of steel fiber concrete shaft lining structure is proposed. Firstly, the benchmark mix ratio of high-performance concrete for shaft lining is obtained through orthogonal design configuration, and the mechanical properties of concrete under different steel fiber mixing rates are investigated. Then, the support project at the coal uncovering of the second return shaft of Dingji Coal Mine is taken as the background, and based on the similarity criterion, the model tests of the shaft lining under uneven loads are carried out. The test results show that the high-performance steel fiber concrete has good mechanical properties, and the compressive strength, tensile strength and flexural strength of the high-performance steel fiber concrete are about 5.3%, 37.5% and 52.5% higher than those of the ordinary concrete when the steel fiber mixing amount is 0.4%, respectively. Under the action of uneven load, the bearing capacity of high-performance steel fiber concrete shaft lining structure is about 13.2%-15.6% higher than that of plain concrete shaft lining. The circumferential compressive strain of the optimized high-performance steel fiber concrete shaft lining is from −230.0×10⁻⁶ to −587.2×10⁻⁶, which is much smaller than its ultimate compressive strain value, indicating that this new type of shaft lining structure is safe and reliable.