煤炭是我国的主要能源之一，保障煤炭开采的生态环境安全是煤炭开采中必须要解决的重大问题，而煤矿开采的生态影响具有典型的累积的特征，因此明确煤矿开采的生态累积效应对于减少煤矿开采对周边生态环境的损害，促进矿区可持续发展具有非常重要的意义，但目前关于煤矿区的生态累积效应的研究尚显薄弱，特别是生态薄弱的干旱半干旱地区的煤矿。为了研究干旱半干旱区煤矿开采的生态累积效应，以内蒙古鄂尔多斯地区为研究对象，利用RS(遥感影像)和GIS技术（地理信息系统技术），选取景观格局干扰累积指数、植被退化累积指数和空气污染累积指数作为生态累积效应的评价指标，对鄂尔多斯以及煤矿区周边地区的生态累积风险进行了评价。结果表明：①鄂尔多斯2000—2010年的生态累积风险低于2000—2019年的生态累积风险，即研究期内鄂尔多斯的生态累积风险有所上升。②煤炭开采对周边生态累积的影响一直是正面影响，即煤矿开采能够降低周边地区的生态累积风险，证明矿区生态治理效果良好。③由于城市和工业区的影响，周边地区空气污染累积风险上升，导致2000—2019年矿区周边生态累积风险分布变为异常的“内外低，中间高”，因此需要加强周边城市以及工业区的生态治理，特别是空气污染方面的治理。

Coal is one of the main energy in our country, ensuring the ecological environment safety of coal mining is an important issue which must be solved in coal mining.The ecological impact of coal mining has the typical cumulative characteristics, so it is of great significance to clarify the ecological cumulative effect of coal mining for promoting the sustainable development of mining areas. However, the research on the ecological cumulative effect of coal mining areas is still weak, especially in the arid and semi-arid areas.In order to study the ecological cumulative effect of coal mine area in arid and semi-arid regions, with Ordos of Inner Mongolia as the research subject, we assesses the ecological cumulative effect of Ordos and the surrounding areas of the mining areas by utilizing RS and GIS and adopting cumulative index of landscape pattern disturbance, afforestation degradation and air pollution as evaluation index of ecological cumulative effect. The results show: ① The ecological cumulative risk from 2000 to 2010 in Ordos is lower than that from 2000 to 2019, that is, the ecological cumulative risk in Ordos has increased during the research period. ② The influence of coal mining on the surrounding ecological accumulation has always been positive, that is, coal mining can reduce the ecological accumulation risk in the surrounding area, which proves that the ecological governance effect of the mining area is good. ③ Under the influence of urban and industrial areas, the cumulative risks of air pollution in the surrounding areas have grown, resulting in an abnormal mining area cumulative ecological risks distribution of “low on the inside and outside, while high on the middle” from 2000 to 2019.Therefore, it is necessary to strengthen the ecological governance in the surrounding cities and industrial zones, especially the control of air pollution.