中关铁矿首采区岩体力学参数确定
Determination of Mechanical Parameters of Rock Mass from Zhongguan Iron Mine First Mining Area

确定可靠的岩体力学参数对中关铁矿岩体稳定性分析和后期开挖模拟等具有重要作用。本文通过采集首采区13号穿脉地质钻孔岩心，获取-230水平矿体、上盘围岩和下盘围岩的岩石力学参数。在室内岩石力学试验和BQ岩体质量分级的基础上，利用BQ与RMR的关系式计算GSI值，运用RocData程序确定中关铁矿首采区的岩体力学参数，比较矿岩体的经验估算值和试验值。结果表明，Hoek-Brown强度准则估算值和BQ线性插值结果基本一致，可将BQ值直接应用到Hoek-Brown准则的岩体力学参数确定中，为矿体开挖模拟和类似工程应用提供依据。
Determining reliable rock mass mechanical parameters plays an important role in the stability analysis and post-excavation simulation of Zhongguan iron ore rock mass. In this paper, the rock mechanical parameters of -230 horizontal ore body, upper plate surrounding rock and lower disk surrounding rock are obtained by collecting the geological drilling core of No. 13 in the first mining area. On the basis of indoor rock mechanics test and rock mass classification, the GSI value is calculated using the relationship between BQ and RMR, and the RocData program is used to de-termine the rock mass mechanical parameters in the first mining area of Zhongguan iron mine, and compare the empirical estimates and test values of the ore body. The results show that the es-timated Hoek-Brown strength criterion is basically the same as the BQ linear interpolation results, and the BQ value can be directly applied to the determination of rock mass mechanical parameters, providing a basis for ore body excavation simulation and similar engineering applications.