摘要
为实现下向进路安全高效经济开采,采用弹性力学理论建立了下向进路薄板力学模型,得到充填体失稳破坏抗拉强度判据,在此基础上建立了下向进路P(h/M)经济模型。以山东某金矿为例分析了安全系数为1.8时,不同进路宽度、高度与下向进路充填经济指标的关系,研究表明:经济指标与进路宽度呈直线增长关系,与进路高度呈幂函数降低关系,且M≤1.5 m时经济指标大幅下降,M>1.5 m时经济指标缓慢下降。进而研究了进路半宽为1.3m到1.7 m,高度为2.8 m到3.6 m的经济指标,建议将传统安全系数分析结果(l=1.5 m、M=3.6 m、h=1.49 m)改为经济指标分析结果(l=1.4 m、M=3.6 m、h=1.40 m),此时充填成本降低1.64元/m3。由此得出,该方法具有很好的理论及现实意义。
To achieve an efficient and safe operation in Underhand drift stoping,the mechanical model of thin plate with downward drift was built by using elasticity mechanics and a criterion for tensile strength failure of filling body was obtained. Then the economic model of downward drift stoping P（ h/M） was built. In the case of a gold mine in Shandong,the relationship between height and width of different drifts and economical index of downward drift filling was analyzed when safety coefficient is 1. 8. Research shows that the relationship between economical index and drift width is in linear growth,while the relationship between economical index and drift height is a negative power function. When M≤1. 5 m,economical index drops significantly. While economical index falls slowly as M＆gt;1. 5 m. Therefore,the economical index is analyzed when a half width of drift ranges between 1. 3 m and 1. 7 m,and height ranges between 2. 8 m and 3. 6 m. It is recommended that the analysis results of safety factor,l=1. 5 m,M=3. 6 m,h=1. 49 m,should be substituted by analysis results of economical indexes l=1. 4 m,M=3. 6 m, h=1. 40 m,for the filling cost has decreased by 1. 64 yuan per cubic meter. Therefore,this research has great theoretic value and realism significance.
出处
《金属矿山》
CAS
北大核心
2015年第1期34-38,共5页
Metal Mine
关键词
薄板模型
下向进路
安全系数
经济指标
Thin plate model
Downward drift
Safety coefficient
Economic index
