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| Preliminary experimental study on uniaxial compressive properties of 3D printed fractured rock models |
| WANG Peitao1，2，3，LIU Yu3，ZHANG Liang3，HUANG Zhengjun1，3，CAI Meifeng1，3 |
(1. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine，University of Science and Technology Beijing，Beijing 100083，China；2. State Key Laboratory of Safety Technology of Metal Mines，Changsha Institute of Mining Research Co.，Ltd.，Changsha，Hunan 410012，China；3. School of Civil and Resource Engineering，University of Science and Technology Beijing，
Beijing 100083，China) |
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Abstract Fail to prepare the fractured rock samples with complex structures has long been hampering the mechanical experiment on the structural surfaces of rock mass. The fractured rock specimens with rough joints were manufactured using the 3D printing technique. Then uniaxial compressive tests were conducted on the rough discrete fractures network(RDFN) models，discrete fractures network(DFN) models and intact rocks with varied scale sizes. The results show that 3D printing technology can provide the opportunity to produce both the DFN models and RDFN models. A serials of rock specimens with the same internal structures and scale sizes could be efficiently established. According to the uniaxial compressive results，the elastic modulus and uniaxial compressive strength(UCS) of the printed fractured rock specimens were apparently lower than those of the intact rock specimens. The uniaxial compressive behaviors of RDFN and DFN models varied with the increasing of scale sizes. Different fractured patterns were also found after compressive failure. When considering the joint roughness，the elastic modulus and UCS of RDFN models were higher than those of the DFN models. The uniaxial compressive behavior of fractured rock mass would be underestimated if the joint roughness is ignored.
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2018, Vol. 37 
