邻近深厚煤矿采空区对鲁南高速铁路的影响分析

为分析采空区对鲁南高铁DK276+400~DK279+900段的影响程度,采用InSAR解译方法获取连续时段的累计沉降量,依据InSAR监测数据绘制古城煤矿附近InSAR沉降干涉成果,得出采空区影响范围及采空区有向东南扩展趋势。采用可控源音频大地电磁法,布置4条物探测线,解译出物探异常区平面位置分布情况及采空高程范围,发现采空区异常部位有自开采工作面边界往东扩展的迹象,与InSAR解译成果基本吻合与收集的资料相符。研究表明,通过对InSAR解译、物探、收集资料等勘探成果综合分析,可准确划分采空区范围。最终确定拟建高铁位于采空区影响范围以外,研究结论对采空区地段高铁安全性评价具有一定参考价值。

Influence Analysis of Adjacent Deep Goaf of the Coal Mine on Rizhao-Lankao High-speed Railway

In order to analyze the influence of the goaf on Rizhao-Lankao High-speed Railway(Dk276+400~Dk279+900),based on the InSAR monitoring data,the InSAR settlement interferogram near Gucheng Coal Mine is made,and the influence range of goaf and the southeast expansion trend of goaf are obtained.Using controlled source audio frequency magnetotelluric method,four geophysical detection lines are arranged to interpret the plane position distribution of geophysical anomaly area and the range of goaf elevation.The abnormal part of goaf shows signs of eastward expansion from the mining face boundary,which is basically consistent with the InSAR interpretation results and the collected data.The research shows that through the comprehensive analysis of exploration results such as InSAR interpretation,geophysical exploration and data collection,the scope of goaf can be accurately divided.Finally,it is determined that the proposed high-speed railway is located outside the influence range of goaf.The research conclusion has a certain reference value for the safety evaluation of high-speed railway in goaf.