震源是地震记录的源头，是地震勘探的关键部分，直接影响地震信号质量，常规炸药震源在高瓦斯矿井受到了十分严格的管制，因此，亟需研究适合于矿井地震勘探的新型震源。基于此，在突出矿井中厚煤层工作面开展了新型CO2震源的槽波勘探实验，基于理论计算、数值模拟及现场实测等方法，进行了新型CO2震源激发地震信号的运动学及动力学特性研究，结果表明：在异巷激发-接收透射勘探及同巷激发-接收透射勘探地震剖面上均出现典型的纵波、横波及槽波，其中槽波主频最高，振幅能量最强；异巷激发-接收的透射槽波频宽约为200~350Hz，槽波埃里震相约为260Hz，同巷激发-接收的透射槽波振幅能量集中在250~450Hz，槽波埃里震相约为280Hz；2Kg液态CO2震源理论能量超过140g的TNT当量；因此，CO2震源激发下的地震信号的频率及振幅满足矿井地震勘探需求。相对于巷帮激发的炸药震源而言，CO2震源集中力源的激发方式有利于槽波发育，以及CO2震源具有深孔激发的优势，避开了巷道及围岩松动圈的影响，定向聚能作用于煤。同时，CO2震源激发具有方向性，利用CO2震源聚能方向性优势进行构造精细勘探是下一步重点研究方向；CO2相变致裂技术常被用于煤层卸压增透，借用CO2震源有望实现对掘进工作面前方的瓦斯富集异常、应力变化异常的随掘随探。

Seismic source is the source of seismic records and the key part of seismic exploration，which directly affects the quality of seismic signal. Conventional explosive source is strictly controlled in high gas mine. Therefore，it is urgent to study new seismic source for seismic exploration in the mine. Based on this，in seam seismic survey of a new type of CO2 source was carried out in medium thick coal seam working face of outburst mine. Based on the methods of theoretical calculation，numerical simulation and field measurement，the kinematic and dynamic characteristics of seismic signals excited by a new type of CO2 source are studied，the results showed that:typical P wave，S wave and channel wave appear in the seismic sections of different roadway excitation receiving transmission detection and same roadway excitation receiving transmission detection，among which the main frequency of channel wave is the highest and the amplitude energy is the strongest;The frequency width of transmitted channel wave excited and received by different roadways is about 200-350 Hz，and the Airy phase is about 260 Hz;The amplitude energy of transmitted channel wave excited and received in the same roadway is concentrated in 250-450 Hz，and the Airy phase is about 280 Hz;The theoretical energy of 2 kg liquid CO2 source exceeds the equivalent to the TNT of 140 g. Therefore，the frequency and amplitude characteristics of CO2 source meet the needs of mine seismic exploration. Compared with explosive source excited in the roadway side，the excitation mode of concentrated force source of CO2 source is beneficial to the development of channel wave，and CO2 source has the advantage of deep borehole excitation，avoiding the influence of roadway and surrounding rock loose zone，and directional energy accumulation on coal seam. At the same time，CO2 source excitation has directionality，and it is the next key research direction to make use of the directional advantage of CO2 source energy accumulation to carry out structural fine detection. CO2 gas fracturing technology is often used for coal seam pressure relief and permeability enhancement，it is expected that the gas enrichment anomaly and stress variation anomaly in front of the coal roadway can be detected with the help of CO2 source.

1 CO2震源激发原理及等效能量计算

2 CO2震源槽波勘探实验

   2.1 地质背景

   2.2 观测系统

   2.3 地震信号及分析

3 CO2震源讨论

   3.1 CO2震源深孔激发

   3.2 随掘随探分析

   3.3 CO2震源方向激发的特点

   3.4 CO2震源与炸药震源的对比讨论

4 结论