超高密度电法在采空区勘探中的应用研究

Application research of ultra-high density electrical method in goaf exploration

为了探明煤矿开采塌陷地的采空区分布范围及破坏程度,以徐州经济技术开发区某采空区为例,采用超高密度电法在研究区共布设5条勘探线。根据获取的结果,对数据异常区进行合理解译进而对采空区破坏情况进行分析,最后推断出采空区的发育及分布特征。研究结果表明:勘探范围内3煤采空区、无名斜井及部分大巷位置、深度与已有资料基本吻合,采出率高,且形成连片的地下垮落空间,属充分采动;7煤采空区范围内未发现明显联通垮落带,采空区呈零星状分布,进一步证明了7煤煤层薄且属小窑开采,属非充分采动。研究结果可为相似地质条件下的采空区治理提供参考。

In order to find out the distribution range and damage degree of the goaf in the coal mining subsidence area,taking a goaf in Xuzhou Economic and Technological Development Zone as an example,five exploration lines were set up in the study area by ultra-high density electric method,according to the obtained results.The data anomaly area was interpreted and interpreted to analyze the damage of the goaf,and finally the development and distribution characteristics of the goaf were inferred.The results showed that the location and depth of No.3 coal seam goaf area,the unnamed inclined wells and some of the main roads in the exploration area were basically consistent with the existing data,and the recovery rate was high,and the underground degraded space was formed,which was fully mining.No obvious joint zone has been found in No.7 coal seam goaf area,and the goaf was distributed in a sporadic manner,which further proved that No.7 coal seam was thin and belonged to small kiln mining,which was not fully mining.The research results can provide some reference for goaf control under similar geological conditions.