Subsurface hazardous environments and hydrological threats in underground mines: an OCTEM detection case study

Nondestructive Testing And Evaluation, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 16

Published: Jan. 24, 2025

Language: Английский

Formation process of cover collapse sinkholes related to groundwater level decline in karst areas

Journal of Mountain Science, Journal Year: 2024, Volume and Issue: 21(11), P. 3832 - 3846

Published: Nov. 1, 2024

Abstract The decline in groundwater level is a key factor contributing to cover collapse karst areas. In this study, the model tests and numerical simulations are conducted reveal breeding process formation mechanism of sinkholes caused by area. Firstly, confirm that generates negative pressure at lower edge overlying soil. experiences four distinct phases during drawdown process: rapid rise, slow decline, gradual dissipation. maximum influenced particle size distribution Then, carried out investigate change loss fillers pipe. simulated results indicate rate thickness initial void ratio soil can affect pressure. As drops, zone forms underground, causing tensile failure surrounding creating an arched hole, which weakens support for This phenomenon also lead under its self-weight. Groundwater table areas result both internal surface collapses. When thin, collapses occur simultaneously. contrast, thick soil, happens first, followed layer-by-layer collapse, ultimately forming sinkholes. Finally, Yujiawan Reservoir discussed. Geological conditions significantly areas, requiring careful consideration from on-site engineers.

Language: Английский

Investigating the damage characteristics of overburden and dynamic evolution mechanism of surface cracks in gently inclined multi-seam mining: A case study of Hongliu coal mine

Environmental Technology & Innovation, Journal Year: 2024, Volume and Issue: unknown, P. 103897 - 103897

Published: Nov. 1, 2024

Language: Английский