Application of Numerical Simulation Methods in Solving Complex Mining Engineering Problems in Dingxi Mine, China

Abstract

In the mining industry, with numerical simulation analysis of stope roof stability, stope exposed area computation, and pillar buckling collapse simulation, backfill body creep damage mechanism research is becoming the most popular method in the field of backfill mining techniques. In this paper, we first summarized and analyzed the current application status and the existing problems of numerical simulation for solving mining engineering technical problems; then, based on the practical engineering problems of mining phosphate rock resources under high and steep rock slopes (HSRS), we carried out a true-3D numerical simulation study for different underground mining methods, to determine the appropriate mining method. Therefore, this paper, taking Dingxi Mine in China as an example, highlights the advantages of the backfill mining method with a high and steep slope; meanwhile, it also points out how to improve the accuracy of a numerical simulation and make it more consistent with the actual situation of the mining engineering application site. This paper only serves as a guide, in order to start a conversation, and we hope many more experts and scholars will become interested and engaged in this field of research.

Hazard Classification and Stability Analysis of High and Steep Slopes from Underground to Open-Pit Mining

“…However, when open-pit mining is used, the safety and stability of the artificially high and steep slopes and the original natural slopes are closely related to the production safety of the mine, and once the open-pit slopes are destabilized, it may affect the production of the mine or cause a safety accident. Therefore, in order to investigate the impact of the slopes constructed in this open-pit mine on the surrounding environment and mining operations under different working conditions, the magnitude of the risk and safety stability needs to be evaluated [ 22 , 23 ].…”

Numerical simulations on shear behaviour of rock joint network under constant normal stiffness conditions

“…The numerical simulation method (the Finite Element Method, FEM or the Distinct Element Method, DEM) [22], laboratory test and theoretical analysis are known as the three main analysis methods. Particularly, the repeatability, simplicity, convenience and diversity of numerical simulation methods play an important role in the field of studying deep underground engineering [23]. For example, Xu [24] and Saadat M [25] used the particle flow code (PFC) to study sawtooth filling joints with different normal stresses, different undulation angles and different filler thicknesses.…”

Stability assessment of surrounding rock in downward mining route supported by slab-wall backfill structure

“…Ground pressure becomes one of the major contributors to geological hazards in mining stopes, consisting mainly of the pressure acting on roof, pillars, surrounding rock, and back ll [1][2][3]. Varying sequences of excavation and back ll result in diverse pressure patterns within the stope [4,5].…”