采场底板突水机理的跨层拱结构模型  

Structure model of cross-layer arc of water-inrush mechanism of coal seam floor

作　　者：张文忠[1,2] 虎维岳 

机构地区：[1]中煤科工集团西安研究院,陕西西安710054 [2]西安科技大学能源学院,陕西西安710054

出　　处：《煤田地质与勘探》2013年第1期35-39,共5页Coal Geology & Exploration

摘　　要：开采华北型煤田受底板承压水威胁的煤炭资源,必须对底板围岩的破坏规律有所认识。为了弄清底板岩层的活动规律,利用实验室大型非线性三维计算机数值模拟,对煤层底板应力分布特征进行了研究。发现采场底板存在跨层拱结构,并指出跨层拱是承载地应力和水压的承载结构;通过理论计算,得出了跨层拱最大主应力的计算公式,据此可以得出底板岩层裂隙产生的位置,该成果可对华北型煤田受承压水威胁矿井的回采工作面宽度设计提供参考。To mine coal resources threatened by confined groundwater in seam floor in North China coal fields,it is necessary to understand the destruction regularities in surrounding rocks of the floor.In this paper,by the nonlinear three-dimensional computer laboratory simulation we studied deeply the stress distribution in seam floor and found that there is the cross-layer arc in the mining floor,pointed out that the cross-layer arc is a bearing structure of groundwater and water pressure.Through the theoretical calculation,we have obtained the biggest principal stress formula of cross-layer arch,according to the formula we got the position where the fractures occur in seam floor,providing the reference for the design of the width of coal face in coal mines threatened by the confined groundwater in North China coal fields.

关 键 词：跨层拱 长壁开采 承压水 数学模型 

分 类 号：TD12[矿业工程—矿山地质测量] P64[天文地球—地质矿产勘探]