在建设高压输电线路过程中,难免会经过煤矿采空区。受地下开采活动的影响,若在这些区域立塔,可能会造成铁塔倾斜或沉陷,从而影响铁塔的稳定性。以某高压输电线路途径邯郸孙庄矿区为例,基于概率积分法得出地表各形变参数的计算公式,并结合高压输电线路的沉降限制标准,预测未来沉降情况,得出如下结论:在仅采动2#煤层时,中心最大沉降值较小,为1.83 m。加入4#煤层的采动后,沉降值增大至2.49 m,当包括6#煤层的采动后,沉降值增加到3.45 m;沉降完全后的预测残余沉降值为101 mm,小于沉降最大允许值400 mm,高压线塔可投入使用。In the construction of high-voltage transmission lines, it is inevitable that routes will traverse mined-out areas of coal mines. Due to the impact of underground mining activities, erecting transmission towers in these regions may result in tower tilting or subsidence, thereby compromising the structural stability of the towers. Taking a high-voltage transmission line passing through the Handan Sunzhuang mining area as a case study, this paper employs the probability integral method to derive the formula for surface deformation parameters. By integrating these parameters with the settlement limit standards for high-voltage transmission lines, future subsidence is predicted, leading to the following conclusions: When only the 2# coal seam is mined, the maximum central settlement value reaches 1.83 meters. The settlement value increases to 2.49 meters with the addition of mining activities in the 4# coal seam, and further rises to 3.45 meters when mining extends to the 6# coal seam. After full settlement, the predicted residual settlement value is 101 millimeters, which is significantly lower than the maximum allowable settlement value of 400 millimeters, thereby ensuring that the high-voltage tower can be safely commissioned.
暂无评论