EconPapers    
Economics at your fingertips  
 

A study of mine water inrushes by measurements of in situ stress and rock failures

Shangxian Yin, Jincai Zhang () and Demin Liu

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2015, vol. 79, issue 3, 1961-1979

Abstract: This paper presents underground measurements (e.g., mini-frac tests) for in situ stress, hydraulic fractures, strata failures and hydraulic conductivity enhancement induced by coal extraction to study mechanisms of coal mine water inrushes. Mining perturbs the original state of in situ stress and results in stress redistribution. This causes rock failures and creates a water-conducting failure zone around a mining panel. If a confined aquifer is situated in the coal seam floor, the mining-induced stresses near the aquifer also generate hydraulic fractures in the rocks near to the aquifer. The mining-induced water-conducting failures and hydraulic fractures by the water pressure of the aquifer are the major reasons to cause water inrushes. The mining-induced water-conducting zone is obtained from theoretical studies and field measurements. The generating condition of the hydraulic fractures by the water pressure is also studied. Methods for predicting water inrushes are given based on the study of water inrush mechanisms. The mechanisms of water inrushes induced by faults are also analyzed from the case studies of water inrushes. It is of crucial importance to detect and map faults, paleo-sinkhole and other geological structures before mining. New mining methods are proposed for mining near confined aquifers to reduce the risks of water inrushes. Copyright Springer Science+Business Media Dordrecht 2015

Keywords: Water inrush; In situ stress; Coal mining; Confined aquifer; Strata failure; Hydraulic fracture (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3) Track citations by RSS feed

Downloads: (external link)
http://hdl.handle.net/10.1007/s11069-015-1941-1 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:nathaz:v:79:y:2015:i:3:p:1961-1979

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11069

Access Statistics for this article

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards is currently edited by Thomas Glade, Tad S. Murty and Vladimír Schenk

More articles in Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards from Springer, International Society for the Prevention and Mitigation of Natural Hazards
Bibliographic data for series maintained by Sonal Shukla ().

 
Page updated 2019-04-09
Handle: RePEc:spr:nathaz:v:79:y:2015:i:3:p:1961-1979