准备工作面走向断层探测技术的应用研究

Application research on strike fault detection technology in preparation working face

走向断层的发育对煤矿准备工作面的布置和回采影响巨大,为准确探明地质构造,以山西华晋吉宁煤业2107准备工作面为试验现场,优选先进的SummitⅡEx防爆槽波地震仪,合理布置检波器孔和炮孔,开展槽波地震反射法勘探及相关研究。结果表明:选取1100 m/s的槽波速度、140Hz的槽波主频和115~150Hz的槽波频谱区间进行处理和计算,本试验共探测出2处反射异常界面,分别推断为2107准备工作面附近F7和F5断层的漂移,经钻探验证,探测效果良好,另外,2107回风巷已掘巷道的反射同相轴也十分清晰,间接证明了槽波地震反射法探测空巷的可行性。

The development of strike fault has a great impact on the layout and mining process of coal preparation face.In order to accurately explore the geological structure,taking the 2107 preparation working face of Shanxi Huajin Jining Coal Industry Co.,Ltd.as the test site,an advanced SummitⅡEx explosion-proof channel wave seismograph was selected and the detector holes and blast holes were reasonably arranged to carry out the channel wave seismic reflection exploration and related research.The results showed that through processing and calculating with channel wave velocity of 1100 m/s,channel wave dominant frequency of 140 Hz and frequency spectrum range of 115-150 Hz,two abnormal reflection interfaces were detected by this test,which were respectively inferred as the drift of F7 and F5 faults near 2107 preparation working face.The drilling verification result showed that the detection effect was good.In addition,the reflection event of 2107 return air roadway was also very clear,which indirectly proved the feasibility of the channel wave seismic reflection method in measuring abandoned roadway.