The pilot study indicates that the PS wave amplitude anomaly will hopefully be a convincing criterion to detect fissure zone.
初步研究表明，PS波振幅异常有望成为强裂隙探测的有力判据。
This paper analyzed the influence of mining depth, coal seam dip, mining height and face length on depth of floor water-conductive fissure zone.
综合分析了开采深度、煤层倾角、煤层开采厚度、工作面斜长等地质采矿条件对底板采动导水破坏带深度的影响。
The paper also presents measures for preventing drilling hole curve, drilling technique in broken zone and fissure zone and technique of sealing hole and pluging loophole.
预防锚孔弯曲的措施； 破碎带、裂缝带的钻进技术及封孔固壁堵漏技术。
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