针对深井巨厚岩层动力灾害的防控,我国部分冲击地压矿井采用了地面水平井压裂防控技术。为了有效监测地面水平井压裂期间的压裂效果,提出了井上下微震联合监测方法,通过井上下微震联合监测台网的建设,对地面水平井分段压裂期间产生的微震事件进行有效监测、分析。结果表明,压裂施工与微震事件的发生具有明显的相关性,使用井上下微震联合监测方法,压裂时段微震事件分布在压裂缝网展布范围内的概率高达71%,微震事件分布与压裂缝网在垂直方向的展布范围具有较高的一致性;井上下微震联合监测技术的应用可有效提高微震的垂直定位精度,能够满足地面水平井分段压裂效果的观测。井上下微震联合监测技术的提出和应用可为后续地面压裂效果的观测、分析提供一定参考。

In China,certain rock burst mines have implemented horizontal well fracturing technology to mitigate dynamic disasters in deep wells with thick rock layers. To effectively monitor the fracturing process during horizontal well staged fracturing,this paper proposes the joint monitoring of surface and underground micro-seismic activity.  By establishing a network for joint monitoring,surface and underground micro-seismic events can be effectively observed and analyzed during horizontal well staged fracturing. Analysis of monitoring data reveals a significantcorrelation between fracturing operations and the occurrence of micro-seismic events. When employing the      joint monitoring of surface and underground micro-seismic monitoring technology,micro-seismic events within the fracture network range reach as high as 71% during the staged fracturing period. The distribution of micro-seismic events generally aligns with the vertical spread of the fracture network. Test results demonstrate that the joint monitoring system improves vertical positioning accuracy,making it well-suited for observing the effect of horizontal well staged fracturing. The proposal and application of joint monitoring technology for surface and underground micro-seismic monitoring provide valuable insights for subsequent observations and analyses of horizontal well fracturing effects.