地球物理勘查在耐火粘土矿采空区勘查中的应用

Application of geophysical exploration in exploration of goaf of refractory clay minerals

为探究高密度电法物探手段在耐火粘土矿采空区勘查中的应用,在研究区进行了物探勘查工作,基本查明研究区30 m深度内的采空区分布及地层岩性、结构等情况。勘查发现,研究区内地层浅部主要为第四系粉土、粉质粘土、砂(砾石)等,厚度较薄,下伏石炭系的粘土岩、砂岩、泥岩及灰岩等,下部为奥陶系的灰岩。共完成高密度电法剖面线12条、20个排列,总计长度2.966 km,物理点1496个,将推断划定的56处采空区位置分别投影至平面图上,做出了物探推断解释采空区范围平面图;发现采空区影响范围较广,尤其是研究区的中部和东北部,影响程度较强,推测研究区采空区范围影响面积合计约为5.4795万m 2。该研究可为研究区采空区及储量核实分析工作提供借鉴。

In order to probe into the application method of high density electrical geophysical exploration method in refractory clay minerals,geophysical exploration was carried out in the study area,and the goaf distribution and their strata lithology and structure in the depth of 30 m in the study area were figured out.The shallow layers in the research area are mainly composed of Quaternary silt,silty clay,sand(gravel),etc.,with a relatively thin thickness.Underlying are clay rocks,sandstones,mudstones,and limestone of the Carboniferous system,while the lower part is limestone of the Ordovician system.12-line and 20-arrayal of high-density electrical profile lines were finished,with a total length of 2.966 km and 1496 physical points.The 56 designated goaf locations were projected onto the plan,and a geophysical exploration section was created to explain the goaf area.The goaf area has a wide impact,especially in the central and northeastern parts of the study area,with a strong degree of impact.It is speculated that the total affected area of the goaf area in the study area is about 5.4795 m 2.Our research is of reference for studying goaf and the verification and analysis of reserves in the study area.