浅埋深厚基岩薄松散层开采地表岩移特征研究

Rock Movement Characteristics of Shallow-buried Deep Bedrock Mining at Thin and Loose Layer on Surface

地表岩移参数是地表建(构)筑物保护的基础数据。嘉元煤矿地层具有基岩厚度大松散层薄的特征,井田范围内广泛分布有村庄,为了后期保护煤柱留设的可靠性,需要对嘉元煤矿开采后地表移动变形特征进行研究。根据嘉元煤矿采矿地质条件,在12301工作面地表布设了两条监测线,现场监测历时16个月的全面和日常观测,通过对监测数据的分析研究,发现嘉元煤矿地表移动具有沉陷周期长,下沉系数小的特征,同时获得了嘉元煤矿1-2煤开采地表移动相关参数,为嘉元煤矿保护煤柱留设提供支撑。

Surface rock movement parameters are the basic data of surface buildings(structures)protection.The strata of Jiayuan Coal Mine have the characteristics of large and thick bedrock as well as thin and loose layer,and villages are widely distributed in the field.In order to ensure the reliability of the later protection of coal pillar,it is necessary to study the characteristics of thick surface movement and deformation in Jiayuan Coal Mine.According to the geological conditions of Jiayuan Coal Mine,two monitoring lines were laid on the surface of 12301 working face,and the comprehensive and daily observation lasted for 16 months.Through the analysis and study of the monitoring data,the results show that the surface movement of Jiayuan Coal Mine has the characteristics of long subsidence cycle and small subsidence coefficient.At the same time,the relevant parameters of surface movement of 1~2 coal mining in Jiayuan Coal Mine are obtained,which would provide support for the setting of protective coal pillars in Jiayuan Coal Mine.