基于声发射监测的含天然弱面辉绿岩变形和强度特性实验研究

doi:10.13722/j.cnki.jrme.2019.0196

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Abstract Aiming at the problem of jointed rock mass with different angles in the stope roof of Hongtoushan Copper Mine，the acoustic emission test of diabase specimens with natural weak faces was carried out under uniaxial compression. Research results have shown that：(1) The diabase specimens with longitudinal weak plane have higher strength than those with transverse weak plane，and the oblique weak plane with triangle is the lowest compressive strength. Under the same stress，the axial strain of the specimen with longitudinal weak penetration will change less than that of the complete specimen，while the axial strain of the specimen with transverse weak penetration will change more than that of the complete specimen，while the transverse strain will change opposite；(2) The complete specimens and the specimens with natural transverse weak surfaces are brittle fractured failure under compression，the specimens with longitudinal weak surfaces are tensile failured along weak surfaces under compression，and the specimens with oblique triangular weak surfaces are shear failured along weak surfaces；(3) Acoustic emission signals of diabase specimens with longitudinal weak face are similar to those of complete specimens when compressed. Acoustic emission signals of diabase specimens with oblique triangle weak face are very active，and the impact rate of specimens has several peak stages. Acoustic emission signals are more active in the case of weak cross-section with double cross-section under compression than in the case of weak cross-section with single cross-section；(4) This test can provide guidance for excavation and support of rock mass with structural planes in stope. The research results can reflect the loading deformation and strength characteristics and failure modes of rock mass with different weak faces.

Key words： rock mechanics natural weak surface diabase acoustic emission impact rate cumulative energy

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	Articles by authors
	WANG Qiang1
	2
	ZHOU Yangyi1
	2
	LI Yuanhui1
	2
	ZHANG Fengpeng1
	2

Cite this article:

WANG Qiang1,2,ZHOU Yangyi1, et al. Experimental study on deformation and strength characteristics of diabase containing natural weak plane by acoustic emission[J]. , 2019, 38(S2): 3646-3653.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0196 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS2/3646

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