›› 2005, Vol. 26 ›› Issue (6): 978-982.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A disquisition on breaking mechanism of high pressure jet impacting on rock

SUN Qing-de1, WANG Zhi-ming1, YU Jun-quan2, ZHANG Wen-hua1   

  1. 1.Institute of Petroleum and Gas Engineering,University of Petroleum, Beijing 102249, China; 2.Zhongyuan Petroleum and Exploration Bureau International, Puyang 457001, China
  • Received:2005-02-28 Online:2005-06-10 Published:2013-12-17

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Abstract: Via nonlinear dynamic FEM, using Hoffman failure criterion, some models of high pressure water jet cutting rock are built; and the process of high pressure water jet breaking rock is researched. The conclusion, which the process of rock broken under high pressure water jet is divided into hammer impacting break and erosional break, is proofed by test to be true. There are two critical pressure of breaking rock which distinguish the hammer impacting break and erosional break; and the mechanism of hammer impacting break is different from erosional break; there is a broken area of tension stress while jet hammer impacting rock. Through analyzing, increasing jet impacting velocity, broadening jet’s diameter, speeding horizontal moving, adding the number of jet bundle and choosing a proper angle between 35 degrees and 40 degrees can enhance the efficiency of water shoot cracking rock.

Key words: high pressure water jet, rock breaking, numerical simulation, critical pressure, mechanism

CLC Number: 

  • TU 25
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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