Home           Contact us           FAQs           
     Journal Home     |     Aim & Scope    |    Author(s) Information      |     Editorial Board     |     MSP Download Statistics
2013 (Vol. 6, Issue: 02)
Article Information:

Analysis of Pre-Blasting Cracks in Horizontal Section Top-coal Mechanized Caving of Steep Thick Seams

Shu-Ren Wang, Xing-Ping Lai and Peng-Fei Shan
Corresponding Author:  Zhixiang Hou 

Key words:  Fracture toughness, pre-blasting, steep thick seam, top-coal mechanized caving, , ,
Vol. 6 , (02): 249-253
Submitted Accepted Published
December 17, 2012 February 01, 2013 June 10, 2013

In order to achieving safe and efficient exploitation in horizontal section top-coal mechanized caving of steep and thick seams, pre-blasting of top-coal is one of the prerequisites and analysis of crack evolution law is a key method to achieving good pre-splitting effects. Based on investigations of coal seams and mining conditions, theories of fracture mechanics were applied to explain the process of caving cracks and fracture toughness of coal seams in preblasting caving were calculated. The distribution of caving cracks was determined with in-situ borehole-wall real deformation optical monitoring systems. The results showed that the pre-splitting crack could rapidly develop in the direction of borehole center line and form the failure surface along the same direction in the last; the fracture toughness of B3 and B6 coal seams was 0.5616 and 1.1900 MPa·m1/2, respectively. The distribution of caving stress from real monitoring instruments provided a theoretical proof for optimizing the parameters of pre-blasting in top-coal safe mining.
Abstract PDF HTML
  Cite this Reference:
Shu-Ren Wang, Xing-Ping Lai and Peng-Fei Shan, 2013. Analysis of Pre-Blasting Cracks in Horizontal Section Top-coal Mechanized Caving of Steep Thick Seams.  Research Journal of Applied Sciences, Engineering and Technology, 6(02): 249-253.
    Advertise with us
ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
Submit Manuscript
   Current Information
   Sales & Services
Home  |  Contact us  |  About us  |  Privacy Policy
Copyright © 2015. MAXWELL Scientific Publication Corp., All rights reserved