近水平煤层下保护层保护范围的数值模拟  

Numerical Simulation of Protection Scope for Under Protective Seam in Nearly Horizontal Coal Seam

作　　者：王长军[1] 穆朝民[1,2] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《煤矿安全》2013年第1期1-4,8,共5页Safety in Coal Mines

摘　　要：以淮南潘三矿近水平煤层下保护层开采工程为研究对象,基于瓦斯渗流、煤岩体变形的基本理论和有限元计算方法,通过模拟下保护层开采后被保护层的应力场和变形场的发展过程,确定了随着保护层工作面的推进,被保护层的应力变形和膨胀变形规律;根据应力卸压保护准则和煤体变形准则,提出了合理保护边界划定依据。研究表明,在结合地面钻井抽采的情况下,近水平煤层下保护层开采后,被保护层的理论保护范围存在扩界空间,可扩大到与下保护层等长等宽。现场试验与数值模拟结果基本吻合。Taking Huainan Pansan Coal Mine nearly horizontal seam under the protective layer mining projects as research object, based on the gas flow, the basic theory of coal and rock mass formation and finite element method, by simulating mining stress field and deformation field development process of the protected seam after mining the under protective layer, the paper identifies stress deformation and expansion deformation laws of the protected seam with the face advancing. Based on protection criteria of stress relief and coal de- formation, the reasonable protection for border demarcation basis is put forward. The study have shown that under the situation of com- bining ground well drainage, after the nearly horizontal coal seam under the protective layer mining, the theory .protect scope of the pro- tected seam exists the expand space, which can be extended to the same long and wide with next layer of protection. Field test and nu- merical simulation results are basically consistent.

关 键 词：近水平煤层 下保护层 保护范围 数值模拟 煤与瓦斯突出 

分 类 号：TD714[矿业工程—矿井通风与安全]