煤岩体破裂电磁辐射分形特征研究

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Abstract To improve accuracy of forecast of coal and rock mass dynamic disasters by using electromagnetic emission (EME)，the EME fractal characteristics of coal samples during uniaxial compression test are studied by laboratory experiments and fractal theory. The results show that the EME impulses have fractal characteristics；and the fractional dimension has a positive power exponential relationship with the impact energy exponent of coal samples. When the loaded coal samples are at the stage of consolidation，the fractional dimension of EME is small；at the stage of elasticity，the fractional dimension of EME has a little increase and remains at a stable level；at the stage of plasticity，the fractional dimension of EME increases greatly；close to main fracture，the fractional dimension of EME decreases gradually；at the main fracture，the fractional dimension of EME decreases gradually；and at the stage of residual deformation，the fractional dimension of EME firstly increases and then decreases，and general trend of the fractional dimension is declining. Based on the above studies，the rock burst has been forecasted accurately and successfully in working face 7249. The practice shows that the EME method which calculates the fractional dimension is feasible to forecast the dynamic disasters in mines.

Key words： mining engineering coal and rock mass electromagnetic emission(EME) fractional dimension experiment

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	Articles by authors
	YAO Jingming1
	YAN Yongye2
	SHUI Guohong1
	YAO Junwei1
	LI Shengzhou1

Cite this article:

YAO Jingming1,YAN Yongye2,SHUI Guohong1, et al. STUDY OF FRACTAL CHARACTERISTICS OF ELECTROMAGNETIC EMISSION DURING COAL AND ROCK MASS FRACTURE[J]. , 2010, 29(S2): 4102-4107.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4102

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