Estimation of S20-Brittleness (An Input Parameter in Drilling Rate Index, Dri) Using Other Types of Brittleness

Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
View: 504

This Paper With 7 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

ITC11_034

تاریخ نمایه سازی: 19 خرداد 1396

Abstract:

Zagros Mountains is the most important geo-structural zone of Middle East in which many developing major cities, like Shiraz, Ahwaz, Bandar Abbas and Kermanshah in Iran and Sulaymaniyah and Erbil in Kurdistan Region (North East of Iraq) have been constructed. Many structures will be planned and constructed in the near future over and under the ground, such as different types of tunnels. Obviously, one of challenging types of problem is the basic parameters of geomaterials (rock and soil) to be used in estimation of total time and coast of projects. The brittleness is a rock property, which can be used in many ways to evaluate the characteristics of rock. It is an important parameter in whole types of rock excavation design, especially in different methods for estimation of performance of tunnel boring machines (TBMs). NTNU (Engineering Geology Laboratory of the Norwegian Institute of Technology) has proposed a successful performance prediction model for TBMs in which the drilling rate index (DRI) is the most important input. The DRI is obtained from combination of results of two special tests, S20-brittleness and Sievers’J-miniature drill test (SJ). The estimation of these tests from results of ordinary tests can help to estimate the DRI. In this paper, authors tried to estimate the S20-brittleness using proposed strength based types of brittleness for Limestones of Zagros Zone (Iran and North East of Iraq). The uniaxial compression strength, Brazilian, point load and S20-brittleness tests were performed on more than 60 Limestone samples. Then the calculated brittleness values were compared and fitted to S20 values. Results show partly good relation between S20 and the brittleness of B9, B10, B12 and UCS as the R2≈0.8 and greater were found for fits. Finally, the S20-brittleness was estimated using the deducted relationships.

Authors

Reza Hosseini

Ph.D. Candidate in Engineering Geology, Faculty of Science, Ferdowsi University of Mashhad, Iran

Gholam Reza Lashkaripour

Professor, Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Iran

Nasser Hafezi Moghadas

Professor, Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Iran

Mohammad Ghafoori

Professor, Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Iran

مراجع و منابع این Paper:

لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :
  • J. Hassanpour, J. Rostami, TBM Performance in Hard Rock, Tehran: ...
  • Blindheim, O.T., Grov, E. and Nilsen, B., 2002. "The effect ...
  • A. Bruland, "Hard Rock Tunnel Boring, Advance Rate and Cutter ...
  • J. Rostami, "Development of a force estimation model for rock ...
  • _ _ _ _ in Tirkiye Yeralt _ ...
  • Meng, F., Zhao, H., Zhang, C., Xu, R., and Lu, ...
  • Hucka V. and Das B., :Brittleness determination of rocks by ...
  • Protodyakonov, M.M., "Mechanical properties and drillability of rocks", In: Proc. ...
  • Dahl, F., 2003. "DRI, BWI, CLI Standards. Available: http ://www. ...
  • S. Yagiz, Assessment of brittleness using rock strength and density ...
  • Kahraman, S., "Correlation of T BM and drilling machine performances ...
  • Altindag, R., "The evaluation of rock brittleness concept on rotary ...
  • Altindag R., _ Assessment of some brittleness indexes in rockdrilling ...
  • O. Yarali and S. Kahraman, "The drillability assessment of rocks ...
  • نمایش کامل مراجع