Indication to distinguish the burst region of coal gas from seismic data

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2009,（3）
• 页码范围: 243-247
• 页数: 5页
• 语种: 英文
• DOI: 10.1007s12404-009-0305-4

摘要

The velocity of an over-burst coal seam is about 1/3 compared to a normal coal seam based on laboratory test results. This can be considered as a basis to confirm the area of coal and gas burst by seismic exploration technique. Similarly, the simulation result of the theoretical seismic model shows that there is obvious distinction between over-burst coal and normal coal based on the coal reflection's travel-time, energy and frequency. The results from the actual seismic data acquired in the coal and gas over-burst cases is con-sistent with that of the laboratory and seismic modeling; that is, in the coal and gas burst region, seismic reflection travel time is delayed, seismic amplitude is weakened and seis-mic frequency is reduced. Therefore, it can be concluded that seismic exploration tech-nique is promising for use in distinguishing coal and gas over-burst regions based on the variation of seismic reflection travel time, amplitude and frequency.