采矿与安全工程学报2016，Vol.33Issue(4)：624-629,6.DOI:10.13545/j.cnki.jmse.2016.04.009
基于微观裂隙扩张的采场底板突水机理研究
Mechanism study of floor water inrush around mining field based on micro-crack extension
摘要
Abstract
Based on the mine ground pressure and strata control theory, spatial distribution characteris-tics of ground pressure and floor water pressure around mining field have been analyzed in this paper, and then the mechanical effects of both these pressures on the coal floor have been determined. By set-ting up mechanics model, the effects of ground pressure and water pressure on a set of tilted cracks have been studied from a microcosmic point of view. Based on the thin plate theory, the effects of water pressure on the effective water-resisting layer have also been studied from a macroscopic point of view. Finally, a theoretical formulae of limiting hydraulic pressure has been deduced. The results have shown that the increase of abutment pressure can lead to the decrease of permeability coefficient; the increase of water pressure can cause the attenuation of rock mass strength and the increase of fissure length. The essence of water inrush in mining field is the result of propagation of micro-cracks and fracture damage of the effective water-resisting layer caused by ground pressure and water pressure.关键词
支承压力/水压/微观裂隙/有效隔水层/突水机理Key words
abutment pressure/water pressure/micro-cracks/the effective water-resisting layer/mechanism of water inrush分类
矿业与冶金引用本文复制引用
高玉兵,刘世奇,吕斌,李昆奇..基于微观裂隙扩张的采场底板突水机理研究[J].采矿与安全工程学报,2016,33(4):624-629,6.基金项目
国家重点基础研究发展计划(973)项目(2013CB227903) （973）
