›› 2009, Vol. 30 ›› Issue (S2): 60-63.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of peculiarity of burnt rock mass and its grouting spreading behavior

GU Shuan-cheng1, SU Pei-li1, WANG Jian-wen2, WANG Hong-ke2   

  1. 1.Xi’an University of Science and Technology, Xi’an 710054, China; 2.Shenmu Ningtiaota Coal Mining Company Ltd., Shaanxi Coal Mining Group, Shenmu 719300, China
  • Received:2009-08-18 Online:2009-08-10 Published:2011-06-21

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Abstract:

Burnt rock is a special kind of rock which is formated from rock whose property has been changed due to coal autoignition. Its physico-mechanical property had been tested in laboratory. The results show that its moisture content has a little reduction; however, its mechanical strength is improved generally; and its Poisson’s ratio has a little reduction too. The splitting conditions of crack tip are analyzed under grouting pressure. Based on this, the code of grouting spreading extent in fractured network is made by employing Bingham grouts spreading model, which can simulate the grouting spreading in intermitent fractured network. Finally, the grouting test is done in burnt rock mass in Ningtiaota Coal Mine; and the grouting pressure is optimized by utilizing grouting spreading program. Comparing the actual spreading extent to the simulating result, they are comparatively anastomotic. The program can guide the grouting parameter design and construction.

Key words: burnt rock, physico-mechanical property, grouting slurry, crack tip, splitting, fractured network, program

CLC Number: 

  • TU 457
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