采场底板裂隙渗流演化规律数值分析  

Numerical Analysis on Seepage Evolution Law of Floor Cracks in Coal Mining Face

作　　者：郭兴明[1] 杨洪波[2] 李永明[1] 

机构地区：[1]山西大同大学煤炭工程学院,山西大同037003 [2]中国矿业大学力学与建筑工程学院,江苏徐州221008

出　　处：《煤炭工程》2013年第4期90-93,共4页Coal Engineering

基　　金：国家自然科学基金项目(50874103)

摘　　要：基于桃园煤矿10煤层的赋存和水文地质条件,采用离散元数值计算,分析了采场底板应力分布、变形和塑性特征,研究了采场底板渗流压力场、流量场分布特征。结果表明:采动影响深度为45m,塑性区深度在工作面底板以下17m,当工作面接近底板奥灰岩含水层,岩体结构较容易破坏失稳,形成渗流通道。现场依据数值计算结果,设计了疏水降压和注浆加固底板控制技术,确保了底板赋水条件下煤层的安全回采。According to the deposition and hydrological conditions of No. 10 seam in Taoyuan Mine, a discrete element numerical calculation was applied to analyze the floor stress distribution, deformation and plastic features of the coal mining face and study the floor seepage pressure field and flow field distribution features of the coal mining face. The results showed the mining influence depth was 45m aand the depth of the plastic zone was at 17m below the coal mining face floor. When the coal mining face was closed to the Ordovician limestone aquifer of the floor, the rock structure would be easily failed and stability lost. Thus seepage channels would be formed. According to the numerical calculation results, a floor control technology with a water pumping and water pressure releasing as well as the grouting reinforcement was designed to ensure the safety mining of the seam under the floor water bearing conditions.

关 键 词：采动压力 底板岩层 裂隙岩体 渗流特征 

分 类 号：TD325[矿业工程—矿井建设]