In this paper, by taking the mining of the gassy outburst coal seam group in Qidong Mine as the engineering background, study was carried out on the influence of the mining of the protective seam upon the movement law of the overlying strata through the similar simulation experiments, the experimental results showed that both the large and small periodic weighting existed in the working face, the distance of the large periodic weighting was 18. 0 to 25. 0 m and that of the small periodic caving was 15. 0 to 17. 5 m;the distribution regularity of the abutment pressure after the mining of the working face and the dynamic loading factor were obtained by analysis; the maximum development height of the caving zone was about 8. 0 to 10. 0 m and that of the separated overburden strata was 23 m. The research results provided an important theoretical basis for the guidance of the high-location drilling in the gob and the design of gas drainage parameters.%以祁东煤矿高瓦斯突出煤层群开采为工程背景,利用相似模拟试验研究了保护层开采对上覆岩层移动规律的影响,试验结果表明:工作面存在大小周期来压现象,大周期来压步距为18. 0 ~25. 0 m,小周期垮落步距约为15. 0~17. 5 m;分析得出工作面回采后的支承压力分布规律以及来压时动载系数的大小;垮落带最大发育高度为8. 0~10. 0 m,覆岩离层最大发育高度为23 m. 该研究成果为指导采空区高位钻孔及地面井瓦斯抽采参数设计提供了重要的理论依据.
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