The use of explosives is restricted on some important holidays,and the handling of unexploded charge is very dangerous.Therefore,an innovative non-explosive technology called instantaneous expansion(IE)was developed for tunneling.IE,whose components are derived from solid wastes such as coal gangue and straw conduces to realizing the reuse of waste.Moreover,its cost is lower than explosives.Blind guns of IE are easy to treat with water.The IE tunneling method is classified into two categories,i.e.IE with a single fracture(IESF)and IE with multiple fractures(IEMF),which are used to form the tunnel cross-section directionally cross-section and to fragment the rocks inside the cross-section,respectively.In this study,the principle of IE tunneling was elaborated first.Then,tunneling experiments and numerical simulations were performed on IE,conventional blasting(CB)and shaped charge blasting(SCB)in comparison.The experimental and numerical results show that IE achieved the best performance of directional rock breaking and corresponded to the most minor excavation-induced damage zone of the surrounding rock.Besides,the tunnel cross-section created by IE was flat and smooth.Comparing IE with CB and SCB,the over/under-excavation area decreased by 64％and 17％,and the excavation-induced damage zone fell by 26％and 11％,respectively.The range of the loose circle is reduced,which is conducive to improving the long-term stability of the roadway.The research provides a safe and economical tunneling method with excellent application prospects.

Quan Zhang;Zhigang Tao;Chun Yang;Shan Guo;Manchao He;Chongyuan Zhang;Huiya Niu;Chao Wang;Shen Wang

School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu,221116,China;State Key Laboratory of Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing,100083,China;School of Resources and Safety Engineering,Central South University,Changsha,410083,China;Department of Mining and Materials Engineering,McGill University,Montreal,QC,H3A 0E8,Canada;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing,100081,China;College of Environmental Science and Engineering,Ocean University of China,Qingdao,266100,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,454003,China

岩石力学与岩土工程学报（英文版）

[1]Quan Zhang;Zhigang Tao;Chun Yang;Shan Guo;Manchao He;Chongyuan Zhang;Huiya Niu;Chao Wang;Shen Wang-.Experimental and numerical investigation into the non-explosive excavation of tunnels)[J].岩石力学与岩土工程学报（英文版）,2022(06):1885-1900

conduces,IESF,IEMF

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