下保护层开采上覆煤岩体变化的数值模拟  

Numerical Simulation of Overlying Rocks Changes with Underlying Protective Seam Mining

作　　者：尚政杰[1] 程远平[1] 刘海波[1] 焦先军[2] 蒋静宇[1] 

机构地区：[1]中国矿业大学,江苏徐州221008 [2]淮南矿业集团公司,安微淮南232001

出　　处：《煤矿安全》2010年第3期5-9,共5页Safety in Coal Mines

基　　金：国家重点基础研究“973”资助项目(2005CB221503);国家自然科学基金重点资助项目(70533050)

摘　　要：为了实现含突出煤层的煤层群安全高效回采,依据淮南潘三矿1792(1)保护层工作面的地质条件及开采参数,对保护层工作面开采过程中围岩的变化规律进行了数值分析及现场相关参数测试。研究结果表明:随保护层工作面的推进,围岩卸压几何特征由"V"字型转变为"W"型,被保护煤层保护范围内某点膨胀量变化的几何特征为"S"型;覆岩变化的时空规律决定了高位钻孔、地面钻井等抽采参数经历活跃期、丰富期、衰退期3个阶段;数值分析结果和现场抽采参数分析结果基本吻合。In order to realize safe and efficient mining in coal seams where there are outburst seams,combining with the geological conditions and mining parameters in 1792（1） protective working face of pansan huainan,the surrounding rock ＇s change laws during mining the protective layer are discussed in numerical way and the related parameters are determined in field.the results show that the surrounding rocks pressure relief geometer turns from ＂v＂ to ＂w＂ and the expansion geometer of the point in the protected seam is ＂s＂ shape as the protective seam mining out and the time and space change laws of the surrounding rocks determine the drainage parameters of high level holes and the surface holes experience three stages：active,rich,decline;the results of numerical analysis and drainage parameters are in agreement.

关 键 词：矿井瓦斯防治 保护层 数值分析 应力 膨胀 

分 类 号：TD713.31[矿业工程—矿井通风与安全]