Evaluation of Compressive Geophysical Prospecting Method for the Identification of the Abandoned Goaf at the Tengzhou Section of China’s Mu Shi Expressway

Abstract

Subsidence deformation of abandoned goafs can induce cracking, distortion and even collapse of surface buildings (structures), and thus, subsidence deformation poses a great threat. Accurate detection of the abandoned goaf location and overburden morphology is an important prerequisite for stability evaluation and scientific management of surface buildings (structures), and effective detection methods are bottlenecks for accurate detection. Taking the abandoned goaf in the Tengzhou section of China’s Mu Shi expressway as an engineering example, step-by-step detection, traditional detection and combination methods are used to determine the location of the underlying abandoned goaf and overburden morphology. First, we conduct disaster investigation on the expressway and surface within the affected area of the abandoned goaf and initially determine the detection area. Then, according to the principle that the detection range can be examined step-by-step from large to small, the high-density resistivity method is used for detection, and the high-resolution seismic method is further selected to analyze the target area. Then, based on the results of the resistivity method, the position of the abandoned goaf is evaluated with the high-resolution seismic method, and the distributions of the overburden subsidence, the water-filled fractured zone and the caving zone (the three belts) are determined. Finally, boreholes are drilled deep into the bottom of the abandoned goaf at specific locations and the distributions of the abandoned goaf and three belts are verified and corrected with drilling data, acoustic detection and borehole TV imaging technology, thereby providing accurate data on abandoned goafs for highway stability evaluation.

Simulation validation based on emission coil of three-axis square Helmholtz magnetic source

“…With the development of national economic demand and industrialization, resource exploration technology has put forward new requirements [1] [2]. As a geophysical method with good effect, electromagnetic prospecting is indispensable in underground exploration and survey [3].…”

Study on Preparation and Performance of Foamed Lightweight Soil Grouting Material for Goaf Treatment

“…To evaluate the stability of surface structures, accurate detection approaches for deserted goafs are indispensable. A combination of incremental, conventional, and seismic methodologies was employed to locate an abandoned goaf on China’s Mu Shi expressway [ 10 ]. Han et al analyzed the excavation stability and reinforcement measures of a cutting slope with a collapsed goaf roadway and mining face, finding that the collapsed mining face was the main factor affecting stability and proposing specific slope ratios for excavation as well as reinforcing methods [ 3 ].…”

Performance comparison of geopolymer and clay-cement grouting pastes and goaf effect evaluation of grouting backfilling method

“…They concluded structural parameter of the mining stope is justifiable, faults would induce subsidence (Zhang et al, 2019). Accurate detection methods for abandoned goafs are necessary to assess the building stability, a combination of step-by-step, traditional, and seismic methods were used to identify a desolate goaf within the Mu Shi expressway of China (Zhang et al, 2022). Han et al conducted an analysis of the stability and methods for excavating and reinforcing for a side slope of cut with goaf roadway of falling in.…”