Arabian Journal for Science and Engineering

, Volume 43, Issue 7, pp 3717–3724 | Cite as

Experimental Research on Stress Relief of High-Stress Coal Based on Noncoupling Blasting

  • Zhigang Liu
  • Anye CaoEmail author
  • Guolei Liu
  • Jinxiu Li
Research Article - Earth Sciences


To discuss the mechanism and effects of noncoupling stress-relief blasting under high stress, theoretical analyses, laboratory experiments, and spot verifications were performed in this study. In addition, by studying the coal blasting mechanism, a theoretical formula to calculate the radius of the fracture area was determined. According to the noncoupling blasting characteristics, a stress relieving test for confined specimens was designed, and the results showed a significant stress reduction in the specimens after blasting. The stress and acoustic emissions showed that a noncoupling charge can relieve stress extremely well in a confined specimen. Combined with practical worksite conditions, for noncoupling stress-relief blasting, a deep hole was drilled into a deep-mine roadway with a high stress concentration, and we observed the electromagnetic radiation and coal stress to verify the effects. The result indicated that the technique had a positive effect on relieving the high stress concentration in roadways.


Rock bursts Stress-relief blasting Noncoupling blasting Stress concentration Blasting experiment 


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This work was supported by “the Fundamental Research Funds for the Central Universities” (Grant No. 2017BSCXB47), “the Postgraduate Research & Practice Innovation Program of Jiangsu Province” (Grant No. KYCX17_1558) and “the Project of PADD funded by the Priority Academic Programme Development of Jiangsu Higher Education Instruction” (Grant No. SZBF2011-6-B35).


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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of MinesChina University of Mining and TechnologyXuzhouChina
  2. 2.School of Resources and Environmental EngineeringShandong University of TechnologyZiboChina
  3. 3.Shandong College of Mining TechnicalZiboChina

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