摘要
为研究某矿山拟采矿体的开采对尾矿库安全的影响,在前期现场调查、现场原位钻孔弹模测试、原位钻孔旁压试验、尾砂抗剪强度原位测试和室内单轴实验、巴西劈裂实验、饱和三轴剪切试验后,选取合适的岩体力学参数,先采用ANSYS建立矿山模型,然后采用FLAC^(3D)5.01对双旗山新采空区的稳定性及尾矿库稳定性进行数值模拟分析。研究表明:拟采矿体的每一段开采所产生的卸载作用,将造成顶板向下位移和底板回弹,再加上采空区上方边坡的作用,矿房会被挤压、剪切;矿房围岩局部产生过剪拉屈服;拟采矿体的开采对尾矿库的影响很小。
In order to study the effect of mining the proposed orebody in Shuangqishan mine on the safety of tailings dam, the reasonable mechanics parameters of rock mass were selected and a mining model was established by ANSYS, so as to use FLAC^3D5.01 for numerical simulation on the stability of its new goaf and tailings dam. All these researches were based on the preliminary field investigation, field in-situ borehole elastic modulus test, in-situ drilling pressure meter test, in-situ test on the shear strength of railings, indoor uniaxial experiments, Brazil splitting experiments, and saturated triaxial shear test. The re- suits showed that the new unloading effect caused by the mining of every section of the proposed orebody would lead to a down- ward displacement and bottom rebound. Coupled with the effect of the slope upward the goaf, the stope would be squeezed and sheared. The surrounding rock of mine had local shear tensile yield, and the mining of the proposed orebody had little influence on the tailings dam.
作者
陈伟
付玉华
占飞
CHEN Wei;FU Yuhua;ZHAN Fei(School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China;Zijin Mining Group Co., Ltd, Longyan, Fujian 364200, China)
出处
《矿业研究与开发》
CAS
北大核心
2018年第4期40-45,共6页
Mining Research and Development
基金
国家自然科学基金资助项目(51464015)
江西省教育厅2015年度科学技术研究重点项目(GJJ15151919)
