微动勘探方法探测林南仓煤矿岩浆岩侵入体

Micro Seismic Exploration Method Applied to Detect Igneous Magma Intrusion in Linnancang Mine

为了在村庄覆盖、第四系地层厚度较大的测区有效探测井田岩浆岩侵入体,首次采用微动勘探方法探测,利用微动测深获得的S波速度结构,结合实测视S波速度剖面特征,综合分析解释岩浆岩侵入体情况。在林南仓煤矿西四采区实测2条剖面,各测点下方的S波速度结构相似,视S波速度剖面上未见高速异常体穿插煤系地层,分析表明该采区无大规模岩浆岩侵入体。实际应用也证明,微动探测结果与探巷验证情况吻合,微动勘探方法利用岩浆岩与煤层的S波速度差异,能有效探测煤田岩浆岩侵入体。

In order to effectively detect the igneous magma intrusions in the overburdens under the village and thick Quaternary strata measuring area,the micro seismic exploration method was firstly applied to the detection of the igneous magma intrusion.The S wave velocity structure was obtained with the micro seismic detection.In combination with the features of the site visual S wave velocity cross section,a comprehensive analysis explanation was made on the igneous magma intrusion conditions.There were two cross sections site measured at the West No.4 Mining Block in Linnancang Minefield.The S wave velocity structure under the each measured location were similar.From the visual S wave velocity cross section,there was no high velocity abnormal mass passed through the coal measures strata and there was no large scale igneous magma intrusion in the mining block.The actual application showed that the results of the micro seismic detection could meet with the mine roadway detection results.With the S-wave velocity difference between the magma rock and seam,the micro seismic detection method could effectively detect the igneous magma intrusion in the coalfield.