Abstract
A series of high and steep slopes have been formed due to the deep exploitation of resources in open-pit mines across China. The stability of these high and steep slopes has become an essential factor affecting the efficient, safe, and sustainable development of deep mineral resources. Due to numerous problems such as constant resistance fluctuation and pipe jamming of the original sliding force monitoring system, leading to system failure, a series of improvements on the current monitoring systems were implemented. This specific work included a mechanical characteristics test of the anchor cable, improvement of the constant resistance structure, and measurement of the internal displacement of the slope. The communication mode and the software architecture of the system were also adjusted. This work significantly improved the overall performance of the sliding force monitoring and early warning system. The improvements performed in this research are systematically described to provide an example of good practice for other sites with similar features. The collected data show that the improved sliding force monitoring system can accurately reflect the whole process of landslide incubation. Moreover, the validity of the early warning criterion based on the sliding force is verified again using the field test.
Highlights
With the exhaustion of shallow surface resources in open-pit mines, the mining depth and slope height are continually increasing and a series of high and steep slopes have been formed along the peripheries of the mines
Ohnishi et al [9] used digital photogrammetry to analyze the evolution of slope stability behavior
Xu et al [11] applied three-dimensional laser scanning technology to open-pit slope monitoring. rough DEM comparison of scanning data in different periods and Advances in Civil Engineering combined with field survey results, the feasibility of threedimensional laser scanning technology applied to mine slope monitoring was confirmed
Summary
With the exhaustion of shallow surface resources in open-pit mines, the mining depth and slope height are continually increasing and a series of high and steep slopes have been formed along the peripheries of the mines. Continuous monitoring is required to ensure the stability of these high-steep slopes and transmission of early warnings of landslides. Salvoni and Dight [8] used internal deformation monitoring and microseismic monitoring technology to study the deep rock damage mechanisms and slope stability of an open-pit slope in Queensland, Australia. E GPS and GIS data were correlated, and potential slope landslides were comprehensively analyzed to issue early warnings to the mine. E original system adds a constant resistance section and a mechanical measuring device to the ordinary slope reinforcement anchor cable to measure the sliding force. Based on the nominal mechanical properties of a single 15.24 mm anchor cable, the stress-strain characteristics of the anchor cable bundles with different combination modes were determined and the variations in yield strength and elastic modulus with varying numbers of anchor cables were obtained. E quantitative effects of anchor cable bundles under different strand numbers were analyzed, and the empirical
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