The result indicates that pre vibration during forming columns and the drainage action of columns is available for the earthquake resistance of foundation.
结果表明：在碎石桩成桩过程中，对土层的预振作用、桩体的排水作用，将有利于土层的抗震。
The outburst risk index and gas gush feature are analysed during roadway progress. The result proves that the effectiveness of zonal gas pre-drainage by cross-measure boreholes.
消突效果检验后进行煤巷掘进，掘进期间通过对突出危险性指标和瓦斯涌出参数的分析，验证穿层钻孔区域预抽瓦斯消突技术的有效性；
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