CHANGDA
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Changda Zheng

I am currently a geotechnical engineering PhD at at school of China University of Mining & Technology(Beijing), where I focus on blasting, caustic, and image processing, etc. I was co-advised by Prof. Qing Li, Prof. Renshu Yang and Prof. Liyun Yang. Before that, I did my civil engineering bachelors at CUMTB.

Email: zhengcd95@163.com  /  Google Scholar  /  ORCID

News

  • 10/2022, 1 paper have been published by Mechanics of Advanced Materials and Structures.

  • 09/2022, 1 paper have been published by Journal of China University of Mining and Technology(Chinese).

  • 05/2021, 1 paper have been published by Shock and Vibration.

  • 06/2021, 1 paper have been published by Arabian Journal of Geosciences.

  • 04/2020, 1 paper have been published by Journal of Vibration and Shock(Chinese).

    • Recent Projects

    Blasting is widely used in mining, nuclear power, national defense engineering, railway, highway, urban subway tunnel construction, etc. It is very difficult for people to accurately grasp the blasting mechanism because of the transient nature of the blasting process, the randomness of the explosion cracks, and the heterogeneity and discontinuous anisotropy of the rock mass. Exploring the mechanism of blasting, making full use blasting energy and putting forward efficient blasting technology are the main work at PhD period.

  • Minimum burden principle

    • Using experimental and CDEM methods, the medium blasting damage with different distance between blasthole and free boundary is quantitatively evaluated. The experimental results and numerical simulation results are in good agreement.The distance between blasthole and free boundary affects the efficiency of blasting energy destroying medium and the blasting failure pattern.

  • Caustics

    • The dynamic caustics method is an experimental method widely used in the study of dynamic fracture in optical mechanics, especially in the study of the singularity of crack tip. Our team have done a lot of research work in caustics. I would like to say, caustic is very COOL！

  • Two-step parallel cutting technology

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    In hard rock deep hole blasting excavation, blast-holes are rarely utilized due to the clamping effect of rock. A two-step cutting technology is put forward. Results showed good blasting effects for two-step cutting technology through theoretical analysis and engineering applications. And a interesting thing is that the best proportion is close to Golden Section 0.618 (The Lower/ The whole).

    Research

    I'm interested in blasting related（theory, technology and application), caustics method, and intelligent mining.

    Journal Papers:

    1. Fractal analysis for the blast-induced damage in rock masses with one free boundary
      Changda Zheng*, Renshu Yang, Qing Li, Chenxi Ding, Chenglong Xiao, Yong Zhao, Jie Zhao
      Mechanics of Advanced Materials and Structures 2022 | paper

    2. Statistics and analysis on blasting excavation parameters of vertical shaft in China's recent 50 years
      Renshu Yang, Changda Zheng*, Qing Li, Chenxi Ding
      Journal of China University of Mining and Technology(Chinese) 2022 | paper

    3. Study of two-step parallel cutting technology for deep-hole blasting in shaft excavation
      Renshu Yang, Changda Zheng*, Liyun Yang, Jinjing Zuo, Tonglei Cheng, Chenxi Ding, Qing Li
      Shock and Vibration 2021 | paper

    4. Numerical analysis of deep hole multi-stage cut blasting of vertical shaft using a continuum-based discrete element method
      Chenxi Ding, Renshu Yang, Changda Zheng, Liyun Yang, Songlin He, Chun Feng*
      Arabian Journal of Geosciences 2021 |paper

    5. Dynamic fracture experiment of specimens with inclined crack under impact load
      Changda Zheng, Liyun Yang*, Chenxi Ding, Cheng Chen, Chenglong Xiao，Yong Zhao
      Journal of Vibration and Shock 2020 | paper

    Services

  • Monitor of PhD Class 2, Grade 2017.

  • Journal Reviewer of Journal of Mining Science and Technology

  • Research member of National Key Research and Development Program of China (No.2016YFC0600903).

  • Research member of National Natural Science Foundation of China (No. 51934001).

  • Research member of National Natural Science Foundation of China (No. 51974316).

    • Awards

  • 2017-2021, Excellent graduate student, China University of mining and Technology (Beijing).

  • 2021, First class scholarship, China University of mining and Technology (Beijing)

  • 2022, The project of China Coal Industry Association has passed the appraisal of "New Technology and equipment of drilling and blasting in kilometer Deep Shaft", and the research results have reached the international leading level as a whole. (Rank: 7)

    • Thanks for the sharing of website's the source code from outstanding senior researcher Yunhe Wang.
    A free big meal for him in Beijing is coming.
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