为了分析在近距离煤层群条件下多保护层开采时下伏煤层开采的卸压效果,采用数值计算及现场验证的方法对保护层开采时下伏煤层开采卸压程度进行了研究,得到保护层开采时,被保护层在开采过程中的垂直应力、塑性区变化规律。现场抽采数据表明:在多重卸压作用下,被保护层的抽采浓度以及纯量都保持较高值,卸压效果明显。 In order to analyze the relief effect of the mining under the coal seams under the condition of near coal seams, the degree of depressurization of the coal seams during mining is studied by numerical calculation and on-site verification. When the protective layer is mined , The protected layer in the mining process of vertical stress, plastic zone changes. The data of on-site extraction shows that under multiple pressure relief, the pumping concentration and purity of the protected layer keep a high value, and the relief effect is obvious.