某地下开采铝土矿直接顶板厚度测定技术研究

Measurement Technology of Direct Roof Thickness in an Underground Mining of Bauxite

对于铝土矿地下开采,直接顶板厚度测定对开采回收率、采掘施工及矿房长期稳定性具有重要影响作用,尤其针对缓倾斜层状岩体中采场软弱直接顶板厚度测定研究意义极其重大。以贵州某铝土矿为工程地质背景,采用SSP地质雷达技术,开展地下开采铝土矿直接顶板厚度测定技术研究。研究结果表明,当SSP地质雷达测定直接顶板厚度低于4 m时,SSP地质雷达测定的厚度与钻孔验证厚度平均误差在15%以内,即SSP地质雷达可以较准确地测定低于4 m厚度的铝土矿直接顶板。

For underground mining of bauxite,direct roof thickness measurement plays an important role in mining recovery rate,mining construction and long-term stability of ore house.Especially,it is of great significance to study the thickness measurement of weak direct roof in stope in gently inclined layered rock mass.Based on the engineering geological background of a bauxite mine in Guizhou province,the measurement technology of direct roof thickness of underground mining bauxite is studied by using SSP geological radar technology.The results show that when the thickness of the direct roof measured by SSP geological radar is less than 4 m,the average error between the thickness measured by SSP geological radar and the borehole verification thickness is less than 15%,that is,the SSP geological radar can accurately determine the thickness of the direct roof of bauxite less than 4 m.