###### Abstract  
In coal-dependent urban economies, the dichotomy between resource exploitation and ecological conservation presents a pronounced challenge. Traditional remote sensing ecological assessments often overlook the interplay between mining activities and urban environmental dynamics. To address this gap, researchers developed an innovative Resource-Based City Ecological Index (RCEI), anchored in a Pressure-State-Response (PSR) framework and synthesized from six discrete ecological indicators. Utilizing geodetic remote sensing data, the RCEI facilitated a comprehensive spatiotemporal analysis of Jincheng City's ecological quality from 1990 to 2022. The findings corroborated the RCEI's efficacy in providing a nuanced portrayal of the ecological state within mining regions. (1) Jincheng City's ecological quality predominantly sustained a mudhopper-tier status, exhibiting an overarching trend of amelioration throughout the study period. (2) Disparities in ecological landscape quality were pronounced at the county level, with Moran's Index exceeding 0.9, signifying a clustered ecological quality pattern. High-high (H-H) zones were prevalent in areas of elevated altitude and dense vegetation, whereas low-low (L-L) zones were prevalent in urban and mining sectors. (3) Further, a buffer zone analysis of two coal mines, differing in their mining chronology, geographical positioning, and operational status, elucidated the ecological impact exerted over a 32-year trajectory. These insights furnish a robust scientific and technical foundation for resource-centric cities to fortify ecological safeguarding and to advance sustainable development stratagems. ecological environmental quality; resource-based city; remote sensing evaluation; spatiotemporal change monitoring; RCEI 20241488141488141488148814814881481488148  
development. However, rapid urbanization has intensified the conflict between resource exploitation and ecological protection, leading to severe environmental degradation, including land subsidence [3], solid waste accumulation [4], water resource degradation [5], and air pollution [6]. This environmental decline directly impacts residents' health and well-being, posing threats to sustainable development [7; 8]. Therefore, accurately assessing the ecological quality of resource-based cities is crucial for their sustainable development. Currently, ecological quality evaluation at various spatial scales is a prominent topic in geographical and ecological research [9; 10], both domestically and internationally. With the increasing global awareness of environmental issues and the demand for sustainable development, more and more scholars and government officials are realizing that it is urgent to address the environmental challenges in RBCs. Consequently, ecological vulnerability [11; 12], ecological security [13; 14; 15], and ecological resilience [16; 17; 18] have emerged as key topics in the ecological research of these cities. Furthermore, the evaluation and monitoring of the ecological environment play a crucial role in ecological research, and it has become a hot topic in geographical and ecological research [19; 20]. According to the China Sustainable Development Plan for Resource-Based Cities (2013-2020), 262 cities are defined as being resource-dependent and classified into four types: growing cities, mature cities, declining cities, and regenerating cities [21]. Notably, prefecture-level resource-based cities are categorized into five categories depending on their resource types, coal, oil and gas, ferrous metal, nonferrous metal, and forestry, with their respective proportions being 44.4%, 9.5%, 33.3%, 9.5%, and 3.3% [22; 23]. Remote sensing technology has emerged as a principal tool for ecological environmental monitoring, attributed to its characteristics of rapid data acquisition and periodic observation [24; 25], especially in mining areas.