布尔台矿重复采动下突水危险性数值模拟研究  

Numerical Simulation Study of Water-inrush Risk in Remining of Double Coal Seams in Buertai Mine

作　　者：范文斌 姚邦华[2] 

机构地区：[1]山西省潞安矿业集团公司安监局,山西长治046204 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《矿业安全与环保》2011年第1期4-5,9,共3页Mining Safety & Environmental Protection

基　　金：国家重点基础研究发展计划(973计划)项目(2007CB209400);国家自然科学基金重点项目(50634050;50904065)

摘　　要：双煤层重复采动后,原有覆岩裂隙将会再次发育,使得顶板突水的危险性增加,防治水工作变得复杂。基于内蒙古布尔台矿已有的工程地质资料,采用数值模拟软件RFPA2D,建立了双煤层重复采动的数值模型,模拟研究了覆岩破断、裂隙发育和再发育规律,分析了采动前后采场垂直应力的变化情况,评价了突水以及二次突水的危险性。数值模拟结果表明:重复采动可引起原有煤层覆岩裂隙再发育,使得原有顶板裂隙发育的高度增大,从而可能引发突水。Remining of double coal seams can make the original fractures of the overlying strata redevelop again, which may cause the water-inrush risk in the roof to become more serious and the perevention and control work of underground water to become more complicated. In this paper, a numerical model for the remining of double coal seams was set up according to the existing geological data in Buertai Mine of Inner Mongolia and by using the software RFPA2D, simulation study was made on the failure of overlying strata and the development and re-development rule of fractures, analysis was made on the change of the vertical stress in the stope before and after mining, and the risk of water-inrush and the secondary water-inrush was evaluated. The numerical simulation results indicatd that: the remining can lead to the re-development of overlying rock’s fractures, which may result in the increase of the original roof fractures’ developmment height, thus enlarging water inflow in the mined area or even causing water-inrush.

关 键 词：重复采动 数值模拟 覆岩裂隙 突水 

分 类 号：TD745.2[矿业工程—矿井通风与安全]