松散干容重对黏土质硅藻土矿床的评价作用

吉林省敦化市高松树硅藻土矿为含黏土矿物及碎屑较多的劣质硅藻土.在对本矿区样品分析结果对比中发现，由于围岩及夹层的化学组分与矿层相同，常规的工业指标不能区分矿石与岩石.为了能够对矿床做出正确评价，在测试样品基本分析项目外又增加了松散干容重一项.经反复测试研究，确定了以松散干容重≤0.95 g/cm³作为指标之一，与其他工业指标一起圈定矿层，成功地解决了矿体圈定及矿石质量评价问题.

THE INDEX OF LOOSE DRY DENSITY IN THE EVALUATION TO CLAYEY DIATOMACEOUS EARTH DEPOSIT

The ore from the Gaosongshu deposit in Dunhua City,Jinlin Province is diatomaceous earth of poor quality with clayey minerals and fragments.Analysis on the samples from the deposit shows that,as the chemical compositions of the wallrocks,interbeds and ores are almost same,the regular industrial indexes cannot distinguish ore from rocks.In order to evaluate the deposit accurately,we add loose dry density to the basic testing items for the samples.After repeated tests,the loose dry density ≤ 0.95 g/cm3 is determined as one of the industrial indexes,which successfully solves the problem of orebody delineation and ore quality evaluation.