采动诱发隐伏陷落柱突水机制与渗流耦合模型研究

doi:10.11799/ce201607029

煤炭工程 ›› 2016, Vol. 48 ›› Issue (7): 93-96.doi: 10.11799/ce201607029

采动诱发隐伏陷落柱突水机制与渗流耦合模型研究

王冬平

煤炭科学技术研究院有限公司

收稿日期:2015-10-28 修回日期:2016-03-25 出版日期:2016-07-10 发布日期:2016-07-22
通讯作者: 程志恒 E-mail:chengzhiheng21@vip.qq.com

Research on the mechanism of mining-induced hidden karst subsidence column water inrush and seepage coupling model

Received:2015-10-28 Revised:2016-03-25 Online:2016-07-10 Published:2016-07-22

摘要/Abstract

摘要： 以桃园煤矿1035工作面突水事故为研究对象，分析了采动煤岩体破坏诱发隐伏陷落柱的突水原因与机制。并针对突水地点的地质条件，基于Darcy、Brinkman、Navier-Stokes(N-S)方程，建立了简化的三维隐伏陷落柱突水非线性渗流耦合模型，采用多物理场耦合软件COMSOL Multiphysics(CM)，对地下水由含水层经过陷落柱进入巷道的突水全过程进行了模拟研究。结果表明：隐伏陷落柱和导水破碎带是诱发突水的关键部位，发生突水应满足两个条件，一是含水层通过陷落柱或导水破碎带与采掘空间相连通|二是含水层有充足的补给水量，并保持恒定的水压|在突水过程中流速呈现阶跃式增加，线性Darcy渗流不能完全描述突水全过程，建立的三维隐伏陷落柱突水非线性渗流耦合模型较好地描述了该过程，证明了模型的合理性|对突水原因与机制的分析与突水调查结果相一致，验证了突水机制分析的正确性。

关键词: 采动, 隐伏陷落柱, 渗流耦合模型, 突水, Brinkman方程

Abstract: Water inrush reasons and mechanism of hidden karst subsidence column induced by mining coal and rock mass damage are analyzed taking the water inrush accident of 1035 working face of Taoyuan coal mine as the research object. A three-dimensional non-linear seepage coupling model of water inrush is established based on Darcy, Brinkman and Navier-Stokes equations for the geological conditions of water inrush location. The whole water inrush process of groundwater from the aquifer through the karst subsidence column into the roadway is studied by using multi-physics coupling software COMSOL Multiphysics(CM). The results showed that hidden karst subsidence column and hydraulic conductivity fracture zone is the key part of water inrush, the two conditions of water inrush are as follows: ① The aquifer and mining space is connected through the karst subsidence column or hydraulic conductivity fracture zone; ② The aquifer has adequate water supply and maintains a constant water pressure. The velocity of flow is step-increasing in the process of water inrush and the water inrush process can not be fully described by linear Darcy seepage. The process can be described better through the three-dimensional hidden karst subsidence column non-linear seepage coupling model of the paper and the analysis on mechanism of water inrush is proved.

中图分类号:

TD745

王冬平. 采动诱发隐伏陷落柱突水机制与渗流耦合模型研究[J]. 煤炭工程, 2016, 48(7): 93-96.

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采动诱发隐伏陷落柱突水机制与渗流耦合模型研究

Research on the mechanism of mining-induced hidden karst subsidence column water inrush and seepage coupling model

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