试论矿床勘探网度的定量分析

ATTEMPTABLE DISCUSSION ON QUANTITATIVE ANALYSIS OF EXPLORATORY GRID DENSITY OF ORE DEPOSIT

本文采用矿床稳定程度、构造复杂程度以及变化系数修正值、二级差、变异函数、矿体规模等六项指标,按其作用大小及可靠程度给予不同的指数赋值并计算各矿床的熵值,以熵值作为确定勘探网度级别的定量标准。据此,提出磷矿床勘探网度的四大类型和勘探网度方案,通过28个实例计算以及17个矿区探采对比结果证明,该方法计算结果与实际资料基本一致。同时,本文采用区间估计验证勘探网度,该验证方法能充分利用全部探矿工程,体现了勘探类型—勘探网度—储量级别的定量关系,简便、可行。

Based on the six indexes of stability of ore deposit, structural complication de-gree, revision value for variation coefficients, difference or second order, variation function, scale of orebody, etc., and according to its function and reliability, the present paper gives the various index values and calculates the entropy values of various ore deposits. By using entropy values as quantitative standards, the kinds of exploratory grid density may be determined. On these grounds, this paper puts forward four types of exploratory grid density and plan of exploratory grid density. Through the calculation of 28 examples and in contrast with prospecting and mining among 17 orefields, it is proved that the calculated results by this method is basically consistent with the actual data. In the same time, the present paper utilizes interval estimation for ex-amining the exploratory grid density: this examination method can make full use of all prospecting engineerings, reflecting (incarnating) the quantitative relationship among exploration types—exploratory grid density—reserves categories, being convenient and feasible.