高密度电法在石膏矿采空区勘察中的应用研究

勘察区位于邵东县周边的福利光华石膏矿区,矿区曾对地下采空的位置进行测量,已知采空区埋藏深度在30~70 m不等,矿区关闭前未对采空区的位置进行系统的测量,故采空边界不明,场地北西向为邵东县城,东南向为河流,因此场地空间展布受到限制。此次研究采用高密度电法的单边三级测深装置探测石膏矿采空区分布范围以及埋藏深度,通过对数据的精细处理与解释,根据石膏矿和采空区的电性特征,从而综合推断石膏矿采空区的地质剖面。结果表明,推断采空区的范围、埋深与已知采空区吻合,基本查明了采空区分布范围以及埋深的现状,在已知采空区的边界外有一定的延伸。在场地两侧空间展布受限的条件下,采用高密度电法的单边三级测深装置探测石膏矿采空区分布范围和埋藏深度,是一种有效的物探方法。

The Application of High Density Resistivity Method in Investigation of Goaf in Gypsum Mines

The exploration area is located in the Fuli Guanghua gypsum mining area around Shaodong county.The location of the underground mined-out area has been measured.The depth of goaf area varies from 30 to 70 meters.No systematic survey of the location of the goaf area was conducted before the closure of the mine area,as a result,the boundary of the goaf area is unclear.The site is located in northwest of Shaodong county with a river to the southeast,so the spatial distribution of the site is restricted.A single-side three-stage sounding device with high-density resistivity method is used to detect the distribution and burial depth of the mined-out area of gypsum mine,comprehensive inference of geological section map of goaf in gypsum mine.Based on the detailed processing and interpretation of data and the electrical characteristics of gypsum mine and goaf,the geological section map of the gypsum mine goaf is inferred comprehensively.The results show that the inference scope and burial depth of goaf coincide with the known goaf.The distribution range and burial depth of goaf are basically ascertained,and the boundary of known goaf extends to a certain extent.Under the condition of limited space distribution on both sides of the site,it is an effective geophysical method to detect the distribution range and burial depth of the goaf in gypsum mine by using single-side three-stage sounding device of high-density resistivity method.