缓倾斜厚大矿体采场结构参数优化研究与应用

Study and Application on the Optimization of Stope Structural Parameters of Gently InclinedThick Orebody

缓倾斜厚大矿体采场结构参数的确定和优化对采场安全、经济、可靠回采等工作意义重大。以山东半岛某地下矿井为例,基于Mathew稳定图表法对采场地质参数和开采参数进行计算,确定了采场尺寸范围。利用FLAC^(3D)数值模拟软件,对采场参数取值进行了进一步分析,综合经济、技术因素确定了采场参数合理取值。研究表明:(1)在综合考虑利用围岩自身支撑能力的基础上,给出了合理的采场宽度范围为28.36~42.17 m。(2)利用FLAC^(3D)数值模拟软件对采场进行数值模拟,通过对不同宽度方案条件下应力场与位移场的分析,明确了该采场34 m宽度为最优方案。

The determination and optimization of stope structural parameters of gently inclined thick large orebody is of great significance to stope safety,economy and reliable mining.Taking an underground mine in Shandong Peninsula as the ex-ample,this paper calculates the stope geological parameters and mining parameters based on Mathew stability chart method,and determines the range of stope size parameters.Using FLAC3D numerical simulation software,the stope parameters are further an-alyzed,and the reasonable values of stope parameters are determined by integrating economic and technical factors.The study results show taht:①Based on the comprehensive consideration of the support capacity of surrounding rock,a reasonable stope width range of 28.36~42.17 m is given.②Using FLAC3D numerical simulation software to simulate the stope,through the a-nalysis of stress field and displacement field under the conditions of different width schemes,it is indicated that the 34 m width of the stope is the optimal scheme.