采矿与安全工程学报2017，Vol.34Issue(4)：655-662,8.DOI:10.13545/j.cnki.jmse.2017.04.008
基于隔水关键层理论的倾斜煤层底板突水危险区域分析
The analysis of the water-inrush dangerous areas in the inclined coal seam floor based on the theory of water-resisting key strata
摘要
Abstract
According to the theory of water-resisting key strata, on the basis of the established me-chanical model of inclined coal seam floor water-resisting key strata with linear increased water pres-sure, the deflection properties, stress distribution and broken characteristics of the inclined floor wa-ter-resisting key strata were analyzed. Then the dangerous area of water-inrush from the inclined floor was identified. The results have indicated that the maximum deflection value of floor water-resisting key strata obviously decreases with the pitch, and the maximum deflection point position hardly devi-ates from the middle of workface, but it also goes downward; due to tensile yield, the failure first ap-pears in the downward position of the long side midpoint of the inclined floor water-resisting key strata, the failure in the lower boundary region is prior to that in the upper boundary region, and broken cracks of an asymmetrical "X" type are formed in the inner of the inclined floor water-resisting key strata; be-fore the ground pressure of the inclined stope, the midpoint downward position of the goaf edges is the dangerous area of water-inrush, and when the ground pressure comes, the coal wall is the dangerous ar-ea; the upper and lower boundary region of the goaf is also the dangerous area during mining.关键词
底板突水/倾斜煤层/隔水关键层/破断特征/危险区域Key words
water-inrush from floor/inclined coal seam/water-resisting key strata/broken charac-teristic/dangerous area分类
矿业与冶金引用本文复制引用
孙建,王连国,鲁海峰..基于隔水关键层理论的倾斜煤层底板突水危险区域分析[J].采矿与安全工程学报,2017,34(4):655-662,8.基金项目
国家自然科学基金项目(51404013,51474008) （51404013,51474008）
安徽省自然科学基金项目(1508085ME77,1508085QE89) （1508085ME77,1508085QE89）
深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1212,SKLGDUEK1509) （SKLGDUEK1212,SKLGDUEK1509）
中国博士后科学基金项目(2013M540478) （2013M540478）
