Detecting and monitoring of water inrush in tunnels and coal mines using direct current resistivity method: A review

Abstract

a b s t r a c tDetecting, real-time monitoring and early warning of underground water-bearing structures are critically important issues in prevention and mitigation of water inrush hazards in underground engineering. Direct current (DC) resistivity method is a widely used method for routine detection, advanced detection and real-time monitoring of water-bearing structures, due to its high sensitivity to groundwater. In this study, the DC resistivity method applied to underground engineering is reviewed and discussed, including the observation mode, multiple inversions, and real-time monitoring. It is shown that a priori information constrained inversion is desirable to reduce the non-uniqueness of inversion, with which the accuracy of detection can be significantly improved. The focused resistivity method is prospective for advanced detection; with this method, the flanking interference can be reduced and the detection distance is increased subsequently. The time-lapse resistivity inversion method is suitable for the regions with continuous conductivity changes, and it can be used to monitor water inrush in those regions. Based on above-mentioned features of various methods in terms of benefits and limitations, we propose a three-dimensional (3D) induced polarization method characterized with multi-electrode array, and introduce it into tunnels and mines combining with real-time monitoring with time-lapse inversion and cross-hole resistivity method. At last, the prospective applications of DC resistivity method are discussed as follows: (1) available advanced detection technology and instrument in tunnel excavated by tunnel boring machine (TBM), (2) high-resolution detection method in holes, (3) four-dimensional (4D) monitoring technology for water inrush sources, and (4) estimation of water volume in water-bearing structures.

Risk assessment of water inrush in tunnel through water-rich fault based on AHP-Cloud model

“…Tunnel water inrush is the dynamic process accompanied by sudden released energy at a high speed. Therefore, when tunnel water inrush occurs, groundwater will suddenly gush into the tunnel, which poses a great threat to the construction personnel and machinery (Zhang et al 2014;Li, Liu, et al 2015;Wu et al 2017).…”

Damage Characteristics and Mechanism of a Strong Water Inrush Disaster at the Wangjialing Coal Mine, Shanxi Province, China

“…Detailed information is illustrated in Figure 1. Some strong water inrush disasters once brought great damage [3][4][5][6].…”

3D assessment of an underground mine pillar by combination of photogrammetric and geoelectric methods

“…Electric resistivity imaging (ERI) is a widely used method exhibiting two main benefits when applied to mine pillar assessment. The first is to provide qualitative detection and monitoring of anomalies within the pillar (e.g., cracks or heterogeneous zones [Jones et al, 2014;Li et al, 2015]). The second is to provide a quantitative description of the electric resistivity distribution within the pillar.…”