复杂环境下的空区顶板岩层移动破坏响应特征研究
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摘要
为了使赋存于构造应力及河床等复杂环境下的某萤石矿矿体能被安全回采,依据矿山设计总体框架,研究采用现场监测和数值计算手段,分别分析了干式充填和灰砂比1∶4胶结充填采矿作业对空区顶板覆岩移动破坏的响应特征。研究结果表明灰砂比1∶4胶结充填采矿工艺能有效控制空区顶板覆岩移动破坏;干式充填采矿在空区顶板覆岩产出的下沉变形值、主应力差值及塑性破坏区等破坏特征值明显偏大,且采空区顶板覆岩遭受多次剪切破坏,裂隙带与河床贯通,不能保证矿山的安全顺利生产。
For safety mining orebody under the complex environment of tectonic stress and river plate,according to mine design framework,the site monitoring and numerical method were used to study movement and destruction response characteristics of goaf roof rock,which is filled in the ways of dry stowing and gray sand ratio 1∶ 4 cementation.The results show that comparing the effectiveness of controlling the goaf roof rock to move and destroy with the gray sand ratio 1∶ 4 cemented filling mining process,the damage characteristic values that are caused by dry-fill mining process,such as sinking deformation value,principal stress difference,plastic zone and so on are significantly larger,and the goaf roof rock suffered shear failure many times,the fracture zones run through the river plate,so it can't ensure the mine produce safely and successfully.
For safety mining orebody under the complex environment of tectonic stress and river plate,according to mine design framework,the site monitoring and numerical method were used to study movement and destruction response characteristics of goaf roof rock,which is filled in the ways of dry stowing and gray sand ratio 1∶ 4 cementation.The results show that comparing the effectiveness of controlling the goaf roof rock to move and destroy with the gray sand ratio 1∶ 4 cemented filling mining process,the damage characteristic values that are caused by dry-fill mining process,such as sinking deformation value,principal stress difference,plastic zone and so on are significantly larger,and the goaf roof rock suffered shear failure many times,the fracture zones run through the river plate,so it can't ensure the mine produce safely and successfully.
引文
[1]柏威伟,陈从新,肖国峰,等.程潮铁矿东区地表及井筒变形监测分析[J],矿业研究与开发,2011(4):11-14.
[2]闵厚禄,黄平路.金山店铁矿地下开采地表安全问题分析[J],矿业研究与开发,2008(10):64-66.
[3]王艳辉,宋卫东,蔡嗣经.地下金属矿山崩落采矿法岩层移动规律分析[J],金属矿山,2002(6):13-16.
[4]江文武,李国建.基于数值模拟与静载试验的新华桥质量检测分析[J],江西理工大学学报,2011(10):9-12.
[5]钟骏泰.赣南区域地质构造特征与地震分布关系研究[J],华南地震,2002(12):45-53.
[2]闵厚禄,黄平路.金山店铁矿地下开采地表安全问题分析[J],矿业研究与开发,2008(10):64-66.
[3]王艳辉,宋卫东,蔡嗣经.地下金属矿山崩落采矿法岩层移动规律分析[J],金属矿山,2002(6):13-16.
[4]江文武,李国建.基于数值模拟与静载试验的新华桥质量检测分析[J],江西理工大学学报,2011(10):9-12.
[5]钟骏泰.赣南区域地质构造特征与地震分布关系研究[J],华南地震,2002(12):45-53.
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