基于蒙特卡洛方法的深部岩体结构面模拟

Simulation of the Structural Plane of the Deep Rock Mass Based on Monte Carlo Method

岩体中广泛发育的结构面破坏了岩体的连续性、完整性,在很大程度上影响、控制着岩体的力学性质及稳定性,对岩体结构面几何特征进行大量的现场调查,并进行准确、有效地描述及定性和定量分析,对矿床开采具有重要意义。以焦家金矿为背景,利用Shape Metrix 3D,采用蒙特卡洛方法对焦家矿区深部岩体进行结构面模拟,得到焦家金矿岩体结构面迹长、倾向和倾角的概率分布,并得到结构面的优势产状分布规律:产状为150°~170°∠40°~60°,平均值为168°∠51°;产状为230°~250°∠30°~50°,平均值为238°∠44°。结果为后期岩石稳定性分级提供了有力的理论与工程依据。

The continuity and integrity of rock mass are destroyed by the widely developed structural planes in rock mass,and the mechanical property and stability of rock mass are controlled and affected by the structural planes to a large extent. The filed investigation and qualitative and quantitative analysis of the geometrical characteristics of the structural planes of the rock mass is of great significance for mining.Taking the Jiaojia gold mine as the study background,based on the Shape Metrix 3D software,the structural plane of the deep rock mass in Jiaojia mining area is simulated by using Monte Carlo method,the probability distribution characteristics of stitch length,orientation and tilt angle of structural plane of the rock mass of Jiaojia gold mine is obtained,besides that,the optimal occurrence value of the structural plane is 150° ~ 170°∠40° ~ 60°,the corresponding average value is 168° ∠51°,the optimal occurrence value is 230° ~ 250°∠30° ~ 50°,the corresponding average value is 238°∠44°. The above study results in this paper can provide the reliable theoretical and engineering basis for the further study of the rock stability classification in the mining area.