千米埋深特厚煤层综放开采顶板导水裂缝带探测技术研究

Study on the Technology of Detecting the Water-guiding Fracture Zone of the Roof in Fully Mechanized Mining of Coal Seam Kilometer Depth

高家堡煤矿101工作面放煤期间可能出现局部放煤超高,导致导水裂缝带发育高度增加,可能波及到白垩系洛河组上段强含水层。由于洛河组上段富水性强,为避免引起防治水事故。采用微震监测技术,实现实时监测工作面回采期间的顶板覆岩破坏变化规律,从而确定工作面回采后的顶板导水裂缝带发育高度。

During the coal mining in the 101 working face of Gaojiaobao Coal Mine, the coal may have appeared to be high in coal, resulting in the increase in the developing height of the guide-water fracture zone, which may affect the upper strata of the upper part of the cretaceous Luohe group. In order to avoid water prevention accidents, it is unfavorable to observe the height of fracture zone from the ground holes. Therefore, microseismic monitoring technology is used to monitor the changing rule of the failure of the overlying roof rock during the recovery period of the working face, so as to determine the height of the roof water-guiding fracture belt in the back of the working face.