Mining seismicity, gas outburst and the significance of their relationship in the study of physics of earthquake source

Abstract

This paper presents an overview of mining seismicity, gas outburst and their origin. The internal relation of mining seismicity and gas outburst in the dynamic process is studied on the basis of the fact that these disasters sometimes occur simultaneously. The examples show a close relationship between mining seismicity and gas outburst in high gassy coal mines. It is proposed that strong mine shocks plus the response of low value and delay time are early warning signals. The mechanism of the relationship between mining seismicity and gas outburst is analyzed by using the location of mining shocks, focus mechanism, cause of mining shocks and conditions of gas outburst. The trigger action of gas fluid on mining shocks, especially the effect of the anomalous property of supercritical fluid on the preparation and occurrence of mining shocks is discussed. According to the similarity between mining-induced earthquakes and tectonic earthquakes in terms of mechanism, the significance of the above results in the study of physics of earthquake source is also discussed.

Study on Dynamic Behavior Law and Microseismic Monitoring in Stoping Process of Roadway with High Gas and Wide Coal Pillar

“…After that, the impact ground pressure and coal and gas outburst are triggered, and they influence each other's point of view, and the study of the influence degree between the two began to appear [8][9][10]. In China, since the concept of composite dynamic disasters was proposed in the 1990s, relevant studies have developed rapidly, mainly focusing on disaster accident statistics, disaster-causing mechanism, and disaster detection and prevention and control technologies [11][12][13][14][15]. According to the statistics of dynamic disaster accidents during 1994-2011, after mine shocks occurred in Liaoning, Gansu, Henan, Shandong, and other provinces, abnormal gas gushing occurred, and rock burst participated in coal and gas outburst and other composite dynamic disasters [16].…”

Seismic Response Analysis of Deep Underground Roadways and Coal Pillars under the Influence of the Adjacent Goaf

“…Underground coal mines are gradually affected by mine earthquakes with increased coal mining depth [12,13]. In the limited deep space, mine earthquakes may cause a series of other coal mine disasters, such as rock explosion, coal and gas outburst [14], and water penetration [15][16][17][18][19][20]. erefore, the response of deep underground coal mine structure should be analyzed under the seismic load.…”

Waveform inversion and analysis of an unusual earthquake swarm in the Boshan mining area, Shandong Province, China

“…Some studies have shown that many mine earthquakes have non-DC mechanisms and may contain a large volume or linear component under some circumstances (Gibowicz and Kijko 1998;McGarr 1992a, b;Feignier and Young 1992;Phillips et al 1999;Fletcher and McGarr 2005;Stec 2007;Julià et al 2009). There have been a number of studies in China in recent years of the source mechanisms of mining-induced earthquakes He et al 2007;Chen et al 2009), although there has been little specific research into the moment tensor of mine earthquakes.…”