介绍了广东地区岩溶发育的分布区域和岩溶塌陷地质灾害的基本情况以及广东地区近几年已发生的岩溶地面塌陷灾害案例，从理论上分析了产生岩溶塌陷的各种诱发因素，如水文因素、地表水作用、水库蓄水、抽取地下水、振动作用、荷载作用等，探讨了岩溶地面塌陷的2种主流成因机制，即潜蚀论和真空吸蚀论。经过实地考察和参考以往研究成果可知，广东地区大部分岩溶地面塌陷的成因机制均为潜蚀型。在此研究基础上，结合电网系统的自身特点，给出了岩溶塌陷区输电线路评估方法，并利用数值模拟手段研究了塌陷区输电塔的稳定性，得到了与现实相符的结果，证明该方法具有可推广性。

This paper introduces the distribution of karst in Guangdong and the basic situation of geological disasters of karst collapse. By analyzing and studying the disaster cases of karst collapse which have occurred in Guangdong in recent years, the various induced factors of karst collapse are also theoretically analyzed, such as hydrological factors, surface water erosion, reservoir impounding, groundwater pumping, vibration effect, load function. Then, two main genetic mechanisms of karst land collapse: suffusion theory and vacuum erosion theory are discussed. Through field investigation and references of previous research results, it shows that the karst land collapse has been formed based on the suffusion theory in most areas of Guangdong. Based on the above analysis and the characteristics of power grid system, the evaluation method of transmission lines in karst collapse areas is proposed. Moreover, the stability of transmission tower in collapse areas by using numerical simulation method is investigated to get the results in accordance with the reality, which proves that the method could be promoted.