Study on the Delimitation of Environmental Influence Zone for Engineering Construction in Karst Area

2025-12-18T14:32:56+08:00

With the increasing scale of underground space construction, urban karst geological disasters in China are becoming more and more serious, having a serious impact on people’s daily lives and engineering construction. In this paper, a variety of monitoring methods are used to analyze the spatial and temporal variation characteristics of regional land subsidence during the construction of the Huanggekeng area in Longgang, Shenzhen, and the method of delimiting the environmental influence zone around the project construction is discussed. The results show that InSAR land subsidence monitoring has high measurement accuracy, and has the advantages of low cost and high efficiency in regional land subsidence monitoring. PS-InSAR technology can effectively delineate the environmental influence zone for engineering construction in the early stage of foundation pit excavation, and provide the basis for the delineation of the surrounding environment investigation range and the layout of the construction monitoring network in the key areas during the construction process. Through different stages of PS-InSAR monitoring data and construction progress, the boundary of the environmental influence zone can be dynamically updated, which is of great significance for the surrounding environment investigation, disaster prevention, and responsibility identification of the engineering.

Application of AFEP and RWP in Water Hazard Detection for Skip Mining Working Faces

2025-10-30T09:46:50+08:00

In deep coal mining, skip mining techniques are increasingly adopted, yet their discontinuous extraction sequences and unique coal pillar support mechanisms create complex overburden failure patterns. This complexity gives rise to severe multi-source water hazards, including persistent threats from bed-separation water, goaf water accumulation, and structural water ingress. The intricate hydro-geological conditions, characterized by variable resistivity and significant electromagnetic interference, often render single geophysical detection methods inadequate, leading to interpretive ambiguities and potential oversight of critical risks.To address these challenges, this study innovatively proposes and demonstrates an integrated detection methodology that synergistically combines the Audio Frequency Electric Penetration (AFEP) method and the Radio Wave Penetration (RWP) method. The core innovation of this research is the design of a coordinated observation system meticulously tailored to the spatial distribution of coal pillars. Beyond data acquisition, a systematic, graded classification framework was established for the comprehensive analysis and fusion of the dual-method results. Crucially, these classification outcomes directly inform the formulation of targeted and tiered governance recommendations, translating detection data into actionable mitigation strategies.Practical application at the 22213 face yielded highly positive results. The integrated approach successfully delineated the spatial distribution of water-bearing anomalies and their connecting channels with a clarity unattainable by either method alone. This not only significantly enhanced the accuracy and reliability of the hydrological threat assessment but also provided a robust scientific foundation for implementing effective water hazard prevention and control measures, thereby ensuring the safe and efficient extraction of the skip mining face.

Journal of Environmental & Earth Sciences

Study on the Delimitation of Environmental Influence Zone for Engineering Construction in Karst Area

Application of AFEP and RWP in Water Hazard Detection for Skip Mining Working Faces