Study on the Fracturing Height of Overburden Strata of Coal Face Based on Microseismic Monitoring

Abstract:

Coal mining causes the failure of overburden strata and forms caving and water-conducting crack zones,meaning “two regions”.The reliability of the monitoring result of fracturing height of overburden strata is a key factor to define the upper bound of safely mining.Because of the strain energy released during the formation of two regions,the corresponding weak seismic wave is made at the same time. Through the microseismic monitoring analysis of the fracturing height of overburden strata in 3up 107 coal face of Luxi Coal Mine , the distances of the uppermost 10 percent microseismic events of the overburden strata are relatively large and the energy is relatively small, so it is difficult to form the effective cracks conducting water.According to that, the fracturing height of overburden strata is determined as 38 m which is better consistent with the 36.2m which is defined by the in-site measuring method.Microseismic monitoring technology is proved to be available in determining the fracturing height of overburden strata of coal face.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 3702-3705
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.3702
• Online since: July 2011
• Authors: Xiu Jie Guo, Ming Zhang, Yong Jie Yang, Min Wang
• Keywords: Coal Face, Fracturing Height, Microseismic Monitoring, Overburden Strata

References

[1] Wang Yuanlong, Jia Weiyong. Analysis and application of two zone, height in deep seam mining. Coal Science and Technology, 2003, 31 (3): 31-33.

[2] Kang Jianrong, Wang Jinzhuang. The mechanical model of the overburden rock under mining and the broken condition analysis . Journal of China Coal Society, 2002, 1: 23-24.

[3] Jiang Fuxing, Xun Luo, Yang Shuhua. Study on microseism monitoring for spatial structure of overlying strata and mining pressure field in longwall face. Chinese Journal of Geotechnical Engineering, 2003, 25 (1): 23-25.

[4] Xun Luo, Jiang Fuxing. The new development of rock rupture microseism monitor in dealing with mine disaster. The Research Paper Corpus of the fourth Chinese Science Association Youth Academic Conference. BeiJing: Chinese Science and Technology Publisher, 2001: 194-195.