【摘要】 当前，我国煤炭资源逐步向深部拓展，在开采过程中时常会出现别于浅部开采的现象和问题，使得矿压监测和管理、水害和瓦斯治理等面临新挑战。文章以神东保德矿为例，利用数值模拟与现场探测两种方式，在考虑现场地应力条件下对煤层底板采动破坏特征进行研究。结果表明：在水平方向构造应力场作用下，顶底板应力、塑性区破坏及围岩垂向位移均随着工作面的开挖不断变化，工作面前方最大应力为25.55 MPa,底板最大破坏深度为30 m;井-孔联合高精度微震监测系统可以对采动条件下底板破坏深度进行实时监测，监测结果显示底板破坏深度在30 m以浅，与数值模拟结果一致。更多还原

【Abstract】 Currently, China′s coal resources are gradually expanding into deeper areas, and phenomena and problems different from shallow mining often occur during the mining process, which poses new challenges to monitoring and management of mining pressure, water hazards, and gas control.Taking Baode Mine in Shendong as an example, this paper uses numerical simulation and on-site detection methods to study the characteristics of coal seam floor mining failure under the consideration of on-site stress conditions.The results show that under the action of horizontal tectonic stress field, with the excavation of working face, the stress of top and bottom plate, the failure of plastic zone and the vertical displacement of surrounding rock change and adjust continuously.The maximum stress in front of working face is 25.55 MPa and the maximum failure depth of bottom plate is stable at 30 meters; the well hole combined high-precision microseismic monitoring system can monitor the floor failure depth in real time under mi-ning conditions.The monitoring results show that the depth of bottom plate damage is at most 30 meters, which is consistent with the numerical simulation results.更多还原