微重力探测在200 m以浅采空区的应用——以黄庄煤矿为例

Application of Microgravity Detection in Shallow Goaf below 200 Meters——Taking Huangzhuang Coal Mine as an Example

摘要:

济南市钢城区拟建设一个市民文体综合活动中心，建设用地处于原黄庄煤矿所在地，采煤历史悠久，开采资料记录不详实，需要进行采空区探测。建设场地处于城区，人文电磁干扰较严重。根据密度差异原理提出使用微重力探测技术，本文建立了研究区的采空区模型，正演计算了地面重力异常响应。将实测数据进行了垂向一阶导数、趋势面分析法处理，并与瞬变电磁测量结果进行对比分析，综合推断了采空区范围。经钻孔验证存在空洞，说明微重力法在200 m以浅的采空区探测是可行的。

Abstract:

Gangcheng district of Ji'nan city is planning to build a citizen cultural and sport comprehensive center. The construction site is located in the former Huangzhuang coal deposit, which has a long history of coal mining. The mining data record is not detailed, so it is necessary to detect the mined-out area. The construction site is located in the urban area, which suffers serious human electromagnetic interference. Based on the principle of density property difference, microgravity detection technology has been proposed. In this paper, the mined-out model of the study area has been established and the associated ground gravity anomaly response has been calculated. The measured data has been processed by vertical first derivative and trend surface analysis. Compared with the transient electromagnetic results, the mined-out area range can be comprehensively detected. It is proved by drilling that there are holes in the mined-out area that the micro-gravity method is feasible at the depth of 200m.