破碎岩体水沙两相渗透特性研究进展
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摘要
为了研究西部矿区浅埋煤层采动破碎岩体诱发的突水溃沙灾害机理,根据两相流相关理论,分析了破碎岩体水沙两相渗流的特征及适用理论模型,提出了破碎岩体水沙两相渗流主要渗透特性参量,研究了破碎岩体水沙两相渗透特性参数的提取方法及不同粒径破碎岩体渗透特性参数变化规律。研究结果表明:(1)破碎岩体水沙两相渗流为典型的非Darcy渗流、非Newton流体,适宜采用双流体连续介质模型;(2)破碎岩体水沙两相渗流特性主要参数为流度、非Darcy流β因子和加速度系数;(3)在沙相压力梯度构造时间序列和渗流速度时间序列基础上,结合数值分析等方法可以有效提取水沙两相渗透特性参数;(4)随着破碎岩体粒径增大,水沙两相非Darcy流β因子和加速度系数随之减小,流度随之增加。
In order to study the mechanism of water-sand inrush disaster Caused by the mining-induced crushed rock mass in shallow coal seam in western mining area,based on the two phase flow theory,the paper analyzed the characteristics of two phase water-sand flow in crushed rock mass and the suitable theoretical model,put forward the basic seepage parameters for two phase water-sand flow in crushed rock mass,researched the extraction method for the seepage parameters and the change rule of seepage parameters in different particle size.The research results indicate that the two phase flow continuum model is fittingly employed to analyze the two phase water-sand flow in crushed rock mass,which belongs to the non-Darcy seepage and non-Newton fluid; the basic characteristic parameters in two phase watersand flow contain fluidity,non-Darcy β factor,and acceleration coefficient ca; combined with the numerical analysis,the basic parameters in two phase water-sand flow are effectively extracted,on the basis of sand phase pressure gradient time series and seepage velocity time series; as the increase of particle size of crushed rock mass,the non-Darcy β factor and acceleration coefficient decrease,while the fluidity augments.
In order to study the mechanism of water-sand inrush disaster Caused by the mining-induced crushed rock mass in shallow coal seam in western mining area,based on the two phase flow theory,the paper analyzed the characteristics of two phase water-sand flow in crushed rock mass and the suitable theoretical model,put forward the basic seepage parameters for two phase water-sand flow in crushed rock mass,researched the extraction method for the seepage parameters and the change rule of seepage parameters in different particle size.The research results indicate that the two phase flow continuum model is fittingly employed to analyze the two phase water-sand flow in crushed rock mass,which belongs to the non-Darcy seepage and non-Newton fluid; the basic characteristic parameters in two phase watersand flow contain fluidity,non-Darcy β factor,and acceleration coefficient ca; combined with the numerical analysis,the basic parameters in two phase water-sand flow are effectively extracted,on the basis of sand phase pressure gradient time series and seepage velocity time series; as the increase of particle size of crushed rock mass,the non-Darcy β factor and acceleration coefficient decrease,while the fluidity augments.
引文
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[8]郭惟嘉,王海龙,陈绍杰,等.采动覆岩涌水溃沙灾害模拟试验系统研制与应用[J].岩石力学与工程学报,2016,35(7):1415-1422.p GUO Weijia,WANG Hailong,CHEN Shaojie,et al.Development and application of simulation test system for water and sand inrush across overburden fissures due to coal mining[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(7):1415-1422.
[9]王路珍,陈占清,孔海陵,等.渗透压力和初始孔隙度对破碎泥岩变质量渗流影响的试验研究[J].采矿与安全工程学报,2014,31(3):462-475.WANG Luzhen,CHEN Zhanqing,Kong Hailing,et al.An experimental study of the influence of seepage pressure and initial porosity on variable mass seepage for broken mudstone[J].Journal of Mining&Safety Engineering,2014,31(3):462-475.
[10]浦海,倪宏阳,肖成.基于格子Boltzmann理论的弱胶结裂隙岩体水沙两相流特性[J].煤炭学报,2017,42(1):162-168.PU Hai,NI Hongyang,XIAO Cheng.Characteristics of water sediment two phase flows in weakly cemented fractured rock mass based on Lattice Boltzmann method[J].Journal of China Coal Society,2017,42(1):162-168.
[11]浦海,陈家瑞,倪宏阳,等.尺度效应对破碎岩体水沙渗流特性的影响[J].煤炭学报,2016,41(S1):102-108.PU Hai,CHEN Jiarui,NI Hongyang,et al.Impact of deformation history on water-sand seepage characteristics of broken rock[J].Journal of China Coal Society,2016,41(S1):102-108.
[12]陈家瑞,浦海,肖成,等.变形历程对破碎岩体水沙渗流特性影响试验研究[J].采矿与安全工程学报,2016,33(2):329-335.CHEN Jiarui,PU Hai,XIAO Cheng,et al.Experimental study of impact of deformation history on water-sand seepage characteristics of broken rock[J].Journal of Mining&Safety Engineering,2016,33(2):329-335.
[13]梁艳坤,隋旺华,朱涛,等.哈拉沟煤矿垮落带破碎岩体溃沙的离散元数值模拟研究[J].煤炭学报,2017,42(2):470-476.LIANG Yankun,SUI Wanghua,ZHU Tao,et al.Numerical simulation of quicksand through the broken rocks in caving zone due to coal mining based on DEM[J].Journal of China Coal Society,2017,42(2):470-476.
[2]张蓓,张桂民,张凯,等.钻孔导致突水溃沙事故机理及防治对策研究[J].采矿与安全工程学报,2015,32(2):219-226.ZHANG Bei,ZHANG Guimin,ZHANG Kai,et al.Water and sands bursting mechanism induced by geological borehole and control measures[J].Journal of Mining&Safety Engineering,2015,32(2):219-226.
[3]张杰,侯忠杰,马砺.浅埋煤层老顶岩块回转过程中的溃沙分析[J].西安科技大学学报,2006,26(2):158-160,166.ZHANG Jie,HOU Zhongjie,MA Li.Sand inrush in roof rock’s rotating in shallow seam mining[J].Journal of Xi’An University of Science and Technology,2006,26(2):158-160,166.
[4]刘洋.突水溃沙通道分区及发育高度研究[J].西安科技大学学报,2015,35(1):72-77.LIU Yang.Study on development height and the partition of water and sand inrush channel[J].Journal of Xi’an University of Science and Technology,2015,35(1):72-77.
[5]许延春,王伯生,尤舜武.近松散含水层溃沙机理及判据研究[J].西安科技大学学报,2012,32(1):63-69.XU Yanchun,WANG Bosheng,YOU Shunwu.Mechanism and criteria of crushing sand near loosening sand stone aquifer[J].Journal of Xi’An University of Science and Technology,2012,32(1):63-69.
[6]缪协兴,王长申,白海波.神东矿区煤矿水害类型及水文地质特征分析[J].采矿与安全工程学报,2010,27(3):285-291.MIAO Xiexing,WANG Changshen,BAI Haibo.Hydrogeological Characteristics of Mine Water Hazards in Shendong Mining Area[J].Journal of Mining&Safety Engineering,2010,27(3):285-291.
[7]范立民,马雄德.浅埋煤层矿井突水溃沙灾害研究进展[J].煤炭科学技术,2016,44(1):8-12.FAN Limin,MA Xiongde.Research progress of water inrush hazard in shallow buried coal seam mine[J].Coal Science and Technology,2016,44(1):8-12.
[8]郭惟嘉,王海龙,陈绍杰,等.采动覆岩涌水溃沙灾害模拟试验系统研制与应用[J].岩石力学与工程学报,2016,35(7):1415-1422.p GUO Weijia,WANG Hailong,CHEN Shaojie,et al.Development and application of simulation test system for water and sand inrush across overburden fissures due to coal mining[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(7):1415-1422.
[9]王路珍,陈占清,孔海陵,等.渗透压力和初始孔隙度对破碎泥岩变质量渗流影响的试验研究[J].采矿与安全工程学报,2014,31(3):462-475.WANG Luzhen,CHEN Zhanqing,Kong Hailing,et al.An experimental study of the influence of seepage pressure and initial porosity on variable mass seepage for broken mudstone[J].Journal of Mining&Safety Engineering,2014,31(3):462-475.
[10]浦海,倪宏阳,肖成.基于格子Boltzmann理论的弱胶结裂隙岩体水沙两相流特性[J].煤炭学报,2017,42(1):162-168.PU Hai,NI Hongyang,XIAO Cheng.Characteristics of water sediment two phase flows in weakly cemented fractured rock mass based on Lattice Boltzmann method[J].Journal of China Coal Society,2017,42(1):162-168.
[11]浦海,陈家瑞,倪宏阳,等.尺度效应对破碎岩体水沙渗流特性的影响[J].煤炭学报,2016,41(S1):102-108.PU Hai,CHEN Jiarui,NI Hongyang,et al.Impact of deformation history on water-sand seepage characteristics of broken rock[J].Journal of China Coal Society,2016,41(S1):102-108.
[12]陈家瑞,浦海,肖成,等.变形历程对破碎岩体水沙渗流特性影响试验研究[J].采矿与安全工程学报,2016,33(2):329-335.CHEN Jiarui,PU Hai,XIAO Cheng,et al.Experimental study of impact of deformation history on water-sand seepage characteristics of broken rock[J].Journal of Mining&Safety Engineering,2016,33(2):329-335.
[13]梁艳坤,隋旺华,朱涛,等.哈拉沟煤矿垮落带破碎岩体溃沙的离散元数值模拟研究[J].煤炭学报,2017,42(2):470-476.LIANG Yankun,SUI Wanghua,ZHU Tao,et al.Numerical simulation of quicksand through the broken rocks in caving zone due to coal mining based on DEM[J].Journal of China Coal Society,2017,42(2):470-476.