煤矿采空区建造光伏发电汇集站的稳定性问题探讨

Stability Analysis and Mitigation Measures of the Mined-out Areas beneath the Transformer Substation of a Photovoltaic Power Generation Station

随着土地资源紧缺,采煤沉陷区土地的再利用问题日益被重视,随之采煤沉陷区光伏发电基地建设应运而生,但采煤沉陷区场区稳定性严重影响着光伏发电基地的建设,尤其是光伏发电基地配套的汇集站工程的建设。依托具体工程实例,根据某采空区上拟建汇集站对抗变形要求,从主要建(构)筑物荷载影响深度、垮落带和断裂带厚度、移动变形及稳定性四方面进行了分析计算。对类似工程的计算和处理提供可借鉴的经验。

With the shortage of land resources, the reuse of lands in the coal-mining subsidence areas has increasingly drawn the attention of the public. As a result, the innovative use of these mined-out areas, such as, photovoltaic power generation sta- tions, has been proposed. However, the site overall stability of these areas might seriously affects the construction of these fa- cilities, especially, foundations that supporting the transformer substations. Throughout the case study of a specific transform- er substation over a mined-out area, this paper estimates the loading influence zone above the cavity, the depth of the caving zone and fractured zone. The movement deformation and the stability of site are analyzed and the grouting method treating the cavity areas that can effectively minimize the deformation of the pooling structures are also recommended in the paper.