海下矿区三维地应力测量及分布规律研究  

Research on the In-situ Stress and Its Distribution Law in Benthoal Mine

作　　者：马春德[1,2] 徐纪成[2] 陈枫[2] 罗一忠[2] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]中南大学现代分析测试中心,湖南长沙410083

出　　处：《矿冶工程》2011年第5期9-12,17,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金重点项目(50934006);国家重点基础研究发展计划(973)课题(2010CB732004)

摘　　要：为解决复杂地质结构条件下的海下开采所面临的安全问题,对LUT地应力测试系统进行了一些技术改造,克服了矿区井下地下水氯离子含量极高、腐蚀严重的困难,对矿区地应力分布进行了准确测量与分析,揭示了矿区内海底三维地应力场的分布规律,并结合矿区地质构造特征对断裂带涌水量影响进行了分析。测试结果表明:矿区最大主应力值随深度增加而增大,最大达到34.17 MPa;最大主应力的方向为北北西向,以水平构造应力为主,平均倾角约23.76°,最小倾角仅0.81°,有利于减小断裂带的涌水量。测试结果为新立金矿海下开采工艺设计与安全生产提供了重要的基础数据。In order to resolve the safety problem during undersea mining under complicated geologic structure condition, some technical modification has been done for LUT in-situ measurement system, resolving the problem of strong corrosion of underground water in the mining area due to ultra-high content of C1- in the water. The accurate measurement and detailed analysis revealed the distribution rule of 3D in-situ stress in this area, and the influence of in-situ stress on the water inflow into fault zone was also analyzed. Results showed that the principle stresses increased with the increasing of depth, maximally reaching 34.17 MPa. The maximal stress was in the direction of NNW with average inclination angle of 23.76° and minimum inclination angle of only 0.81°, which contributed to the reduction of water inflow into fault zone. The obtained results would be helpful for the design and safety production of undersea mining.

关 键 词：海下矿区 海下采矿 三维地应力测量 涌水量 新立金矿 

分 类 号：TD311[矿业工程—矿井建设]