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

作     者：CHENG Jian-yuan TANG Hong-wei XU Lin LI Yan-fang 

作者机构：Xi＇an Research Institute China Coal Research Institute Xi＇an 710054 China 

出 版 物：《Journal of Coal Science & Engineering(China)》 (煤炭学报（英文版）)

年 卷 期：2009年第15卷第3期

页      面：243-247页

学科分类：081801[工学-矿产普查与勘探] 081702[工学-化学工艺] 081802[工学-地球探测与信息技术] 08[工学] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 

基　　金：Supported by the Key Program of National Basic Research Program(973)of China(2006CB202208) the CBM Important Project of 2008ZX05040-003 in China 

主　　题：coal and gas over-burst region seismic data characteristic identification 

摘      要：The velocity of an over-burst coal seam based on laboratory test results. This seam is about 1/3 compared to a normal coal 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 consistent 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 seismic 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.