通过地质采矿条件分析和文献研究表明,淮南某矿首采工作面属于巨厚松散层薄基岩覆盖煤层开采条件. 基于实测资料,提出了考虑松散层效应的工作面采动程度分析方法,揭示了厚松散层薄基岩煤层开采地表沉陷特殊规律,并从关键层理论角度对沉陷机理进行了科学解释. 依据观测站资料,求取了该工作面开采地表沉陷预计概率积分参数,并进一步分析了预计参数特征及产生机理.%The analysis of geological and mining conditions and the literature study showed that the first-mining face studied in this paper belonged to the mining condition of the coal seam covered by the extra-thick loose-bed thin bedrock. Based on the measured data, the analysis method for the mining degree of the working face which took into consideration of the loose bed effect was put forward, the special law of the surface subsidence in the mining of the coal seam with the extra-thick loose-bed thin bedrock was revealed, and the scientific explanation was given to the subsidence mechanism from the perspective of key strata theory. Finally, the expected probability integral parameters of the surface movement and subsidence of the working face were calculated according to the observation data, and further analysis was made on the characteristics and generation mechanism of the expected parameters.
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