巨厚关键层条件下远距离下保护层开采保护效果分析  

Analysis on Protection Effect of Mining in Protective Sean with Long Distance Under Condition of Ultra Thick Key Stratum

作　　者：马建宏[1,2] 侯江涛[1] 张兵奇[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454003 [2]河南理工大学深井瓦斯抽采与围岩控制技术国家地方联合工程实验室,河南焦作454003

出　　处：《煤炭工程》2014年第2期67-70,74,共5页Coal Engineering

基　　金：河南省高等学校青年骨干教师资助计划(2010GGJS-058);河南省杰出人才计划(094200510004);河南省高校科技创新团队支持计划(2010IRTSTHN004)

摘　　要：文章针对登封向阳煤矿巨厚关键层条件下的远距离下保护层开采,理论分析了巨厚关键层的极限跨距,运用数值模拟的方法,模拟巨厚关键层破断前后被保护层的应力、膨胀变形的程度,计算结果表明:由于巨厚关键层的存在,登封向阳煤矿保护层开采后保护效果不太理想,即巨厚关键层从某种程度上屏蔽了保护层的保护作用。此外,开采层过薄、层间距较大也一定程度上影响了保护效果。Based on the lower long - distance protective seam mining under huge key layer was introduced, the extreme span of huge key layer was theoretically analyzed. Applying numerical simulation, the paper simulated stress condition and swelling deformation degree of the protected seam before and after the fracture of the huge key layer, the results show that, after the exploitation of lower long - distance protective seam, the protective effect on the protected seam ming is not satisfyingbecause of the huge key layer, which shields the protective effect on the protected seam. And if the protected seam is thin, the interval between seams is large, the protective effect could be influenced.

关 键 词：保护层开采 巨厚关键层 瓦斯抽放 保护效果 数值模拟 

分 类 号：TD713.31[矿业工程—矿井通风与安全]