|
|
|
| THEORY AND PRACTICE OF ROCK MECHANICS RELATED TO EXPLOITATION OF UNDERSEA METAL MINE |
| (School of Resources and Safety Engineering，Central South University，Changsha，Hunan 410083，China) |
|
|
|
|
Abstract Xinli district of Sanshandao Gold Mine is the first subsea metal mine in China. Large-scale exploitation of the mine will certainly destroy the stability of rock masses，so it is necessary to study the rock mechanics-related problems in undersea metal mines. Based on the demands of undersea mining，the mechanical parameters of ore body and rock mass，the micro-structure and permeability of clay soil in the coastal deposit are measured and analyzed. The experimental modeling system of undersea metal mining is established. The reasonable and safe thickness of the isolation roof is obtained by the experimental simulation. The numerical modeling of the undersea metal mining is carried out to testify the accuracy of the experimental simulation. Using the Orthogonal test method，the optimal structure parameters in subsea mining are obtained by constructing a objective function based on the principle to keep the stability of rock masses. By optimizing the sequence of panel mining stope of ore block，the mining sequence of the “two stope panels” is applied for the mine. By the analysis of the mining condition of the deposit，such as the properties of ore and rocks，the inclination of ore bodies，etc.，a lower settlement frame cut-and-fill stope mining method has been proposed. The results from three years in-situ mining and field monitoring show that the reasonable and safe thickness of the isolation roof，the lower settlement frame stope hierarchical level filling mining method and in-situ real-time monitoring have provided the technical foundation for the safety of seabed mining.
|
|
Received: 14 May 2010
|
|
|
|
| [1] 孙洪星. 中国海下采煤展望[J]. 中国煤炭，1999，25(8)：34–36. (SUN Hongxing. Prospects of undersea mining in China[J]. China Coal，1999，25(8)：34–36.(in Chinese))
[2] 宋子安，常 颖. 龙口海下综放开采关键技术研究[J]. 煤矿开采，2009，14(1)：48–51.(SONG Zian，CHANG Ying. Key technology of full-mechanized caving mining undersea in Longkou[J]. Coal Mining Technology，2009，14(1)：48–51.(in Chinese))
[3] 古德生，李夕兵. 现代金属矿床开采科学技术[M]. 北京：冶金工业出版社，2006.(GU Desheng，LI Xibing. Modern mining science and technology for metal mineral resources[M]. Beijing：China Metallurgical Industry Press，2006.(in Chinese))
[4] 赵国彦. 海基硬岩矿床的安全开采技术研究[J]. 中国安全科学学报，2009，19(5)：159–166.(ZHAO Guoyan. Study on the safety mining technology of seabed hard rock[J]. China Safety Science Journal，2009，19(5)：159–166.(in Chinese))
[5] 李 伟，陈 晨. 海洋矿产开采技术[J]. 中国矿业，2003，12(1)：44–46，51.(LI Wei，CHEN Chen. Extraction technology of ocean mining[J]. China Mining Magazine，2003，12(1)：44–46，51.(in Chinese))
[6] 岩小明，李夕兵，郭 雷，等. 露天地下开采隔离层稳定性研究[J]. 岩土力学，2007，28(8)：1 682–1 686.(YAN Xiaoming，LI Xibing，GUO Lei，et al. Stability of boundary pillar of open pit and underground mine[J]. Rock and Soil Mechanics，2007，28(8)：1 682– 1 686.(in Chinese))
[7] 李元辉，南世卿，赵兴东，等. 露天转地下境界矿柱稳定性研究[J]. 岩石力学与工程学报，2005，24(2)：278–283.(LI Yuanhui，NAN Shiqing，ZHAO Xingdong，et al. Stability of boundary pillars for transition from open pit to underground mining[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(2)：278–283.(in Chinese))
[8] 陈尚桥，黄润秋. 基础下浅埋地下洞室安全顶板厚度研究[J]. 岩石力学与工程学报，2000，19(增1)：961–966.(CHEN Shangqiao，HUANG Runqiu. A study on safety thickness of shallow buried cavities under foundation[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(Supp.1)：961–966.(in Chinese))
[9] 中华人民共和国国家标准编写组，GB/T50123–1999 土工试验方法标准[S]. 北京：中国计划出版社，1999.(The National Standards Compilation Group of People¢s Republic of China. GB/T50123–1999 Standard of soil test method[S]. Beijing：China Planning Press，1999.(in Chinese))
[10] 孙 祥，杨子荣，赵忠英. 主应力方向地质力学分析法的应用[J]. 岩土工程学报，2006，28(1)：81–83.(SUN Xiang，YANG Zirong，ZHAO Zhongying. Application of geomechanical analytic approach of the principal stress orientation[J]. Chinese Journal of Geotechnical Engineering，2006，28(1)：81–83.(in Chinese))
[11] 马春德，徐纪成，陈 枫，等. 大红山铁矿三维地应力场的测量及分布规律研究[J]. 金属矿山，2007，(8)：42–46.(MA Chunde，Xu Jicheng，CHEN Feng，et al. Research on in-situ stress measurement and its distribution law in Dahongshan iron mine[J]. Metal Mine，2007，(8)：42–46.(in Chinese))
[12] 刘爱华，彭述权，李夕兵，等. 深部开采承压突水机制相似物理模型试验系统研制及应用[J]. 岩石力学与工程学报，2009，28(7)：1 335–1 341.(LIU Aihua，PENG Shuquan，LI Xibing，et al. Development and application of similar physical model experiment system for water inrush mechanism in deep mining[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(7)：1 335– 1 341.(in Chinese))
[13] 刘光廷，叶源新，徐增辉. 渗流–三轴应力耦合试验机的研制[J]. 清华大学学报(自然科学版)，2007，47(3)：323–326.(LIU Guangting，YE Yuanxin，XU Zenhui. Development of testing machine for coupled seepage and triaxial stress measurements in rocks[J]. Journal of Tsinghua University(Science and Technology)，2007，47(3)：323–326.(in Chinese))
[14] 张 杰，侯忠杰. 固–液耦合试验材料的研究[J]. 岩石力学与工程学报，2004，23(18)：3 157–3 161.(ZHANG Jie，HOU Zhongjie. Experimental study on simulation materials for solid-liquid coupling[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(18)：3 157–3 161.(in Chinese))
[15] 李树忱，冯现大，李术才，等. 新型固流耦合相似材料的研制及其应用[J]. 岩石力学与工程学报，2010，29(2)：281–289.(LI Shuchen，FENG Xianda，LI Shucai，et al. Research and development of a new similar material for solid-fluid coupling and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：281–289.(in Chinese))
[16] 郑 宏，李春光，李焯芬，等. 求解安全系数的有限元法[J]. 岩土工程学报，2002，24(5)：626–628.(ZHENG Hong，LI Chunguang，LEE C F，et a1. Finite element method for solving the factor of safety[J]. Chinese Journal of Geotechnical Engineering，2002，24(5)：626–628.(in Chinese))
[17] 李树忱，李术才，徐帮树. 隧道围岩稳定分析的最小安全系数法[J]. 岩土力学，2007，28(3)：549–554.(LI Shuchen，LI Shucai，XU Bangshu. Minimum safety factor method for stability analysis of surrounding rock mass of tunnel[J]. Rock and Soil Mechanics，2007，28(3)：549–554.(in Chinese))
[18] 熊 敬，张建海. Drucker-Prager型屈服准则与强度储备安全系数的相关分析[J]. 岩土力学，2008，29(7)：1 905–1 910.(XIONG Jing，ZHANG Jianhai. Correlation analysis of relationship between Drucker-Prager yield criteria and strength margin safety factor[J]. Rock and Soil Mechanics，2008，29(7)：1 905–1 910.(in Chinese)) |
|
|
|
2010, Vol. 29 
