基于地震槽波透反射法的煤厚与断层联合勘探技术研究

Study on joint exploration technology of coal thickness and faults based on seismic trough wave transmission reflection method

为减少断层和煤厚变化对工作面正常生产和瓦斯治理带来的影响,对新田煤矿1901工作面进行了地震槽波透射、反射联合勘探,通过透射法CT成像和反射法共中心点叠加及时深转换等手段,取得了诸多成果,可为矿井生产和瓦斯治理提供依据。研究表明,探测距离对透射、反射槽波提取均会产生一定影响,3.4 m左右稳定煤层槽波提取有效距离最短为90~110 m;1901工作面共划分2个煤厚大于3.8 m和1个煤厚小于3 m的区域,稳定煤层会降低槽波的分辨率;F 1401-5断层和F 1401-4断层向工作面内延伸长度分别为76 m和67 m。

In order to reduce the impact of faults and changes in coal thickness on the normal production and gas control of the working face,a joint exploration of seismic trough wave transmission and reflection was conducted on the 1901 working face of Xintian Coal Mine.Through methods such as transmission CT imaging and reflection common center point stacking and deep conversion,various achievements were achieved,which can provide a basis for mine production and gas control.Research has shown that the detection distance has a certain impact on the extraction of transmitted and reflected trough waves.The shortest effective distance for extracting trough waves in stable coal seams around 3.4 m is 90~110 m.The No.1901 working face is divided into two areas with a coal thickness greater than 3.8 meters and one area with a coal thickness less than 3 meters.Stable coal seams will reduce the resolution of trough waves.The extension lengths of fault F 1401-5 and fault F 1401-4 towards the working face are 76 m and 67 m respectively.