摘要
以陕西南梁煤矿间隔式采煤方法回采浅埋平缓地貌下极近距离煤层上组煤为研究背景,采用理论、数值计算方法分析上组煤遗留间隔式煤柱对下组煤顶板中应力分布规律的影响,运用RFPA数值软件模拟上组煤层开采,分析间隔式煤柱弹性核区应力分布规律,结合弹性力学半平面无限体理论与20203工作面顶、底板岩性、回采工艺参数等,对比分析单一、组合间隔式煤柱下底板中水平、垂直,切应力分布规律。
Taking the interval mining method in Mining upper seam of shallow buried ultra-close coal seam group with flat landform of Nanliang Mine as research background,this paper studies the effect of interval pillars remained in upper coal seams on stress distribution laws of lower seams with the combining method of theoretical analysis and numerical simulation.The software RFPA was used to simulate upper seam mining and analyzed stress distribution laws of elastic core of pillars in combination with theory of half infinite plane,lithology of roof and floor and mining technology parameters at 20303 workface.The horizontal,vertical and shear stress distribution laws of single and combined interval pillars were analyzed by contrast.
出处
《煤矿安全》
CAS
北大核心
2016年第9期60-63,共4页
Safety in Coal Mines
基金
国家高技术研究发展计划(863计划)资助项目(2012AA062101)
国家自然科学基金资助项目(51374200)
关键词
浅埋煤层
间隔式煤柱
底板应力分布
数值模拟
平缓地貌
shallow coal seam
interval coal pillar
floor stress distribution
numerical simulation
flat landform
