基于非线性渗流理论的破裂岩体突水危险性量化方法  

A quantitative method for water inrush risk from fractured rocks based on nonlinear seepage theory

作　　者：刘伟韬[1,2,3] 赵吉园 孔德斌 顾玉龙 杜刚 王建刚 LIU Weitao;ZHAO Jiyuan;KONG Debin;GU Yulong;DU Gang;WANG Jiangang(State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 266590,China;College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Shanxi Shiquan Coal Industry Co.,Ltd.,Changzhi 046200,China)

机构地区：[1]山东科技大学省部共建矿山岩层智能控制与绿色开采国家重点实验室培育基地,山东青岛266590 [2]山东科技大学安全与环境工程学院,山东青岛266590 [3]山西石泉煤业有限责任公司,山西长治046200

出　　处：《煤炭学报》2024年第11期4520-4541,共22页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(52304238);山东省自然科学基金资助项目(ZR2023ME002)。

摘　　要：破裂岩体是主要的突水通道之一,突水发生时地下水在破裂岩体中表现出非线性渗流特征,但由于破裂岩体内部结构的复杂性,对其突水危险性的研究以定性分析为主,难以量化评价。为了能够找到一种破裂岩体突水危险性量化方法,开展了破裂岩体非线性渗流实验,研究了破裂岩体的内部结构参数和水在破裂岩体内的非线性渗流参数的变化规律,基于多孔介质非线性渗流理论和分形理论,推导了非线性渗流数学模型,确定了破裂岩体的结构特征参数、非线性渗流特征参数与破裂岩体的突水危险性分级三者之间的关系,建立了基于非线性临界压力梯度的突水危险性判据,结果表明:非线性临界压力梯度可以作为评价破裂区域突水危险性的量化指标,该量化指标同时考虑了破裂岩体内部结构参数和地下水的非线性流动状态参数;相较于传统的突水危险性确定方法只考虑完整岩层的阻水能力,建立的非线性临界压力梯度突水危险性判据考虑了破裂区域岩层和完整岩层在内的所有岩层能够承受的总的临界水压值,反映了所有岩层的阻水能力。建立的非线性临界压力梯度突水危险性判据创新性地尝试了将非线性渗流状态参数应用到突水危险性量化方法研究当中,是一种将破裂岩体的内部结构参数和地下水的流动状态参数耦合的突水危险性量化方法。Fractured rock mass is one of the main water inrush channels.Groundwater exhibits nonlinear seepage charac-teristics in fractured rocks when water inrush occurs.However,the research on the risk of water inrush from the fractured rocks mainly focuses on qualitative analysis due to the complexity of the internal structure of the fractured rocks,which is difficult to be quantitatively evaluated.In order to find a quantitative evaluation method for the risk of water inrush from fractured rocks,the experiments of nonlinear seepage in fractured rocks were carried out to investigate the changes in the internal structural parameters of fractured rocks and the parameters of nonlinear seepage in fractured rocks.A nonlinear seepage mathematical model was derived based on the nonlinear seepage theory and fractal theory of porous media.The relationship between the structural characteristic parameters of the fractured rocks,nonlinear seepage characteristic para-meters,and the classification of the water inrush risk was established.An evaluation criterion of water inrush based on the critical pressure gradient of nonlinear flow was established.The results indicate that:the critical pressure gradient of non-linear flow can be used as a quantitative indicator to evaluate the risk of water inrush from the fractured rocks,which con-siders both the internal structural parameters of the fractured rocks and the nonlinear flow state parameters of groundwater;The evaluation criterion of water inrush based on the critical pressure gradient of nonlinear flow considers the total critical water pressure that applied to all rock layers including the fractured area and intact rock layers,compared to the traditional method of determining the risk of water inrush,which only considers the water resistance ability of intact rock layers.Also,the evaluation criterion considers the water resistance ability of all rock layers.It is the first attempt to apply nonlin-ear seepage state parameters to the study of water inrush hazard quantification method

关 键 词：矿井突水 非线性渗流 突水危险性 量化方法 临界压力梯度 

分 类 号：TD745[矿业工程—矿井通风与安全]