矿体真厚度计算公式探讨  

Study on calculation formula of orebody true thickness

作　　者：梁瑞[1] 徐超[1] 张晓梅[1] 

机构地区：[1]河北省地矿局第三地质大队,张家口075000

出　　处：《矿产勘查》2013年第1期75-78,共4页Mineral Exploration

摘　　要：长期以来,我国各类找矿勘探书籍中关于钻孔中矿体真厚度的计算公式均表达为:M=L/N(sinαsinβcosγ±cosαcosβ),地勘单位也一直采用该公式计算矿体真厚度。但随着外来勘查工程新技术的引进(如扇形孔),在利用上述公式计算矿体真厚度时却出现了问题——当钻孔倾斜方向与矿体倾向相同且钻孔于矿体顶板穿过时,真厚度计算结果会出现负数。同样,在进行地质剖面测量或地表探槽施工时,也会出现类似情况,给地勘工作人员造成了困惑。由此说明上述公式存在着不足,需进行重新推算、改进,使其更加严谨、完善,避免为地勘工作人员造成不必要的麻烦。For long time, the calculation formula of true thickness of orebody described in various of Chinese deposit and or exploration text books is shown as： M =L/N（ sinasincosT -＋ cosc^cos~）, and the Chinese exploration enterprises this formula in the practi-cal application. However, some shortcomings occur when applying the above - mentioned formula after introducing newly foreign explo- ration technology such as fan drilling in mineral exploration. When the dip direction of drillhole is same with the orebody and drillhole drills through the hanging wall of orebody, the calculated true thickness of orebody is a negative number. Similarly, same problems happen when carrying out geological profile survey or surface trenching activities, these will confuse geological prospecting workers in the exploration process. Therefore, it is necessary to improve the formula and adjust the formula for the convenient application accurate- ly, and it will avoidmaking troubles for the related exploration workers.

关 键 词：扇形孔 矿体真厚度 计算公式 负数 

分 类 号：P624.7[天文地球—地质矿产勘探]