大红山铁矿露天地下联合开采衔接地压问题研究  

Study on Ground Pressure of Open-underground Combined Mining in Dahongshan Iron Mine

作　　者：徐士申 

机构地区：[1]玉溪大红山矿业有限公司,云南玉溪市653100

出　　处：《矿业研究与开发》2016年第2期32-38,共7页Mining Research and Development

基　　金：国家科技支撑计划项目(2013BAB02B06)

摘　　要：露天地下联合开采的矛盾是影响大红山铁矿大规模开采的最重要影响因素。为了在深部二期工程中缓解与消除联合开采的矛盾,设计的衔接开采方案重点是把上覆岩层的岩移角提高至70°,导致矿山面临露采边坡稳定性与高落差分段应力集中等主要地压问题。数值模拟与相似材料模拟试验研究均表明按70°移动角重新划定深部二期工程可采范围是可行的。为了确保生产安全和指导采矿,矿山建立了微震监测系统、地表变形监测系统与应力监测等综合地压监测系统。地表变形与微震监测初期结果表明,深部一期工程的上覆岩层塌陷角为75.4°-87.2°,监测数据进一步证实深部二期工程可采范围的可行性,研究成果对矿山的稳定发展具有重要意义。The contradiction of open-underground combined mining was the most important factor influencing on massive production in Dahongshan Iron Mine. In order to solve the contradiction in the phase-Ⅱ project of deep mining, the cohesive mining method should focus on the stability of openpit mining slope, stress concentration in high drop section, and other problems of ground pressure, which were caused by increasing the movement angle of overburden rock strata up to 70 degrees. Both numerical simulation and similar material simulation tests proved that increasing the movement angle of overburden rock strata up to 70 degrees was feasible to redrawn the ruinable range. In order to ensure safety and guide the mining sequence,microseismic monitoring system, surface deformation monitoring system and pressure monitoring system were established. Ground surface deformation and primary results of microseismie monitoring showed that the movement angle of overburden rock strata in the phase- Ⅱ project was 75.4-87.2 degrees, and the monitoring data further identified the feasibility of ruinable range for phase- Ⅱ project. The research results were important to the stable development of Dahongshan Iron Mine.

关 键 词：露天地下联合开采 露采边坡 高落差 数值模拟 相似材料模拟 微震监测 

分 类 号：TD861.1[矿业工程—金属矿开采]