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2016 | 25 | 6 |
Tytuł artykułu

Construction of time-space structure model of deep stope and stability analysis

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
To quantitatively characterize the evolution process of disaster-causing stress fields and to analyze the whole time domain characteristics of a stope from moving to stability, we constructed the four-dimensional time-space structure model of deep stope using PFC discrete element modeling software, and embedded transducers in the goaf area to monitor overlying strata movement characteristics. Targeting the gangue in the goaf area, the compression characteristics, energy absorption characteristics, and evolution of hulking coefficient over time during compaction are analyzed under different mining conditions. Results indicate that: 1. In the first stage of development of overlying strata, an intact time-space structure model of the stope cannot be formed. This means the stope structure has not reached final mechanical equilibrium. 2. Compression of the gangue fragments is an important mechanism of energy release of key strata as the strata are ruptured. The energy absorbed by the gangue reaches the maximum when the intact time-space structure model of the stope is formed. 3. The strength of the immediate roof is directly related to the development of the stope structure. 4. The development of the time-space structure of the stope is divided into two stages, which are marked by the time point when the advance distance is equal to the width of the working face. The above analysis can explain reasons for the delayed occurrence of dynamic disasters, laying a basis for reducing dynamic disasters.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
25
Numer
6
Opis fizyczny
P.fig.,ref.
Twórcy
autor
  • State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
autor
  • State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
autor
  • State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
autor
  • State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
Bibliografia
  • 1. JIANG Y., ZHAO Y. State of the art: investigation on mechanism, forecast and control of coal bumps in china[J]. Chinese Journal of Rock Mechanics and Engineering, 34 (11), 2188, 2015.
  • 2. PAN J., MAO D., LAN H., WANG S.,QI Q. Study status and prospects of mine pressure bumping control technology in China[J]. Coal Science and Technology, 41 (06), 21, 2013.
  • 3. YAO J., HE F., XU J., DOU L. Energy mechanism of rock burst and its application[J]. Journal of Central South University (Science and Technology), 40 (03), 808, 2009.
  • 4. CAO A., LUO X., DOU L., WAND H. KING A. Experimental research on seismic wave transmission and attenuation associated with underground longwall coal mining[J]. Journal of Mining & Safety Engineering, 28 (04), 530, 2011.
  • 5. ZHANG C.Q., FENG X.T., ZHOU H., QIU S.L., WU W.P. A top pilot tunnel precond- -itionnning method for the prevention of extremely intense rockbursts in deep tunnels excavated by TBMS[J]. Rock Mechanics and Rock Engineering, 31 (03), 289, 2012.
  • 6. CAI M. Influence of stress path on tunnel excavation response - numerical tool selection and modeling strategy[J]. Tunneling and Underground Space Technology, 23 (06), 618, 2008.
  • 7. Tan Y.L., Yu F.H., Chen L. A new appoach for predictiong bedding separation of roof strata in underground coalmines. International Journal of Rock Mechanics & Mining Sciences 61, 183, 2013.
  • 8. TANG C.A., WANG J.M., ZHANG J.J. Preliminary engineering application of microseismic monitoring technique to rockburst prediction in tunneling of Jinping II Project[J]. Journal of Rock Mechanics and Geotechnical Engineering, 02 (03), 193, 2010.
  • 9. Jiang F. Study on the spatial structure of overlying strata and its application[J]. Journal of Mining And Safety Engineering, 1, 30, 2006.
  • 10. Jiang F., XUN L.,Yang S. Spatial fracturing progresses of surrounding rock masses in longwall face monitored by microseismic monitoring techniques[J]. Chinese Jounal of Geotechnical Engineering, 1, 23, 2003.
  • 11. Syd S Peng . Topical areas of research needs in ground control-A state of the art review on coal ming ground control[J]. Journal of China University of Mining and Technology, 44 (01), 1, 2015.
  • 12. WEN Z.J., M. Rinne , SONG Z., HAN Z.Z., WEN J.H. Research on Modeling of Spatial Dynamic Structural Mechanics and Spatio-temporal Evolution of Coal Mine Stopes[J]. Tehnički vjesnik – Technical Gazette 22 (03), 2015.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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