Abstract
Abstract There are abundant limestone resources in Weibei area. However, under the influence of a complex geological environment and harsh external environment, they often suffer from various types of serious geological disasters, which seriously threaten the safety of the people in the mining area and the development of mining resources. Therefore, it is urgent to carry out relevant governance. Firstly, combined with the field engineering geological data of a typical limestone quarry slope in Weibei, this paper makes a detailed geological survey of the study area. Then, the geometric model of the limestone mine slope is established to analyze the stress relationship between each block and its failure mode. Finally, a deep Newtonian force monitoring and early-warning system is set up in the dangerous area of large deformation of the slope to carry out the early warning treatment of reinforcement. The results show that (1) limestone is the main component of the mine, followed by mudstone, with developed joints and fissures, broken rock mass, and high hidden danger of engineering geological disasters; (2) in addition to bending and toppling failure on the surface of the mine slope, there are three failure modes: toppling failure along the joint surface, combined failure along the joint and plane, and failure along the outward structural plane; and (3) the NPR anchor cable is used to strengthen the slope, and the real-time monitoring of the slope force changes is realized, which has a particular reference significance for the study of similar significant deformation failure mechanisms of the slope and imminent slide warning.
Highlights
The Weibei area between the Guanzhong Plain and the Loess Plateau is the richest area in Shaanxi Province in terms of limestone reserves and production, and is an important part of cement and other building materials
It is essential to carry out a unique survey on the geological environment of Weibei limestone mines and conduct research on the prevention and control of geological disasters in the limestone mining area and the restoration and treatment of high and steep rock face open-pit mining
It is necessary to explore a way of mine geological environment management that can eliminate geological disasters and restore the ecological environment, especially the comprehensive restoration of topography and landscape and sustainable, comprehensive management [33,34,35,36,37,38,39,40,41]
Summary
The Weibei area between the Guanzhong Plain and the Loess Plateau is the richest area in Shaanxi Province in terms of limestone reserves and production, and is an important part of cement and other building materials. It is necessary to explore a way of mine geological environment management that can eliminate geological disasters and restore the ecological environment, especially the comprehensive restoration of topography and landscape and sustainable, comprehensive management [33,34,35,36,37,38,39,40,41] This requires us to first investigate the current situation and the laws of the geological environment problems of the historical mines in the area, find out the recoverable governance and the existing recovery governance technology, and further carry out the special investigation of the geological environment of the limestone mines in Weibei area. By researching the prevention and control of geological disasters in limestone mining areas and the restoration and treatment of open-pit mining on high and steep rock faces, on-site and technical support will be provided for later restoration and treatment
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