Abstract
Weibei area is the largest limestone resource area in Shaanxi Province, which is an important boundary to distinguish the climate difference between the south and the north of China, and also a significant ecological safety protection barrier in the northwest of China. The complex geological environment and harsh environment make the mining area have serious geological disaster hidden danger. Based on the site engineering geological data of typical limestone quarry slope in Weibei, this paper constructs a three-dimensional geological model, uses FLAC3D software to simulate excavation, and analyzes the stress and strain law of the quarry slope. SlopeLE software was used to analyze the safety factor of slope stability and the potential slip surface before and after taking reinforcement measures. The results show the following: (1) Limestone is the main rock component of the mine, followed by mudstone. The joint and fissure are developed, the rock mass is broken, and the hidden danger of engineering geological disaster is high. (2) There is a sliding trend in both sides during excavation, and the maximum vertical displacement is 2.1 cm. (3) If the slope is reinforced according to the design scheme, the slope stability safety factor will be increased from 1.062 to 1.203 in a stable state, which greatly improves the stability of the slope and provides a guarantee for human and financial resources.
Highlights
Weibei area in Shaanxi Province is the dividing line of climate between the north and south of China and an important ecological security barrier
In recent years, the mining area has developed rapidly, but there is a lack of long-term monitoring and control of the geological environment in the mining area, so the geological environment in the mining area has deteriorated sharply, and geological disasters occur frequently, which seriously threatens the safety of people in the mining area and the development of mining resources [2,3,4]
FLAC3D numerical simulation software [21,22,23,24,25,26,27,28] is good at analyzing large deformation problems in geotechnical engineering, and it adopts display calculation method, which can ensure that better calculation results can be obtained even without convergence of calculation
Summary
Weibei area in Shaanxi Province is the dividing line of climate between the north and south of China and an important ecological security barrier. E numerical calculation method [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20] is widely used in geotechnical engineering It can present the realistic slope and its geological environment, strata, and lithology and whether there is joint surface in the computer software and analyze the failure mechanism according to the results of simulation calculation. Erefore, this paper will use FLAC3D numerical simulation method to carry out numerical simulation analysis on the slope of limestone quarry in Weibei area to reproduce and analyze the specific process of slope deformation and failure It has great advantages in solving geotechnical engineering problems and has been recognized by many scholars [37, 38]. erefore, this paper will use FLAC3D numerical simulation method to carry out numerical simulation analysis on the slope of limestone quarry in Weibei area to reproduce and analyze the specific process of slope deformation and failure
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