Title: Mechanism analyses on floor heave and water inrush when rock roadway traversing faults above high-pressure water body

Authors: Shiqi Liu; Yanchun Xu; Yubing Gao; Yaqi Luo

Addresses: School of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Room 207 of Zonghe Building, Xueyuan Road, Haidian District, Beijing, 100083, China ' School of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Room 207 of Zonghe Building, Xueyuan Road, Haidian District, Beijing, 100083, China ' School of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Room 207 of Zonghe Building, Xueyuan Road, Haidian District, Beijing, 100083, China ' Illinois State Geological Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 429 Natural Resources Building, 615 E Peabody Ave, Champaign, IL 61801-3028, USA

Abstract: To explore the mechanism of floor heave of the roadway that traverses faults under high groundwater pressure, a mechanical model is established. At the same time, the stress distribution and failure characteristics of the roadway are analysed. Taking Zhaogu No. 2 Coal Mine as an example, some of the corresponding preventive measures are proposed to diminish the deformation of the roadway floor. The results showed that the main influence factors of the floor heave of roadway are the fault structure and the width of roadway. Comparing with circumstances with no fault, the amount of floor heave increases by 2.56 times when the roadway crosses faults. Under the condition of broken floor rocks, the wider the roadway is, the higher the floor heave is.

Keywords: roadway water inrush; floor heave; high-pressure water body; mechanism analysis; rock roadways; traversing faults; groundwater pressure; modelling; stress distribution; roadway failure; mining industry; China; preventive measures; floor deformation; roadway floor; roadway width; coal mines.

DOI: 10.1504/IJMME.2016.076496

International Journal of Mining and Mineral Engineering, 2016 Vol.7 No.2, pp.126 - 138

Received: 31 Dec 2014
Accepted: 06 Jan 2016
Published online: 10 May 2016 *

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