急倾斜综放破碎顶煤流动规律数值模拟  

Numerical simulation of broken top coal flow law by mechanized caving in steep seam

作　　者：崔峰[1,2] 来兴平[1,2] 曹建涛[1,2] 朱世阳[1,2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《西安科技大学学报》2010年第3期255-259,270,共6页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金资助(10772144);教育部博士点基金项目(20096121110001);陕西省重点实验室项目(09JS018)

摘　　要：急倾斜特厚煤层综放工作面长度较短,提高水平分段高度可增产增效,但存在顶煤放出率低的问题。有必要采取措施弱化高阶段顶煤,研究弱化后煤体流动规律。苇湖梁煤矿急倾斜煤层高阶段顶煤超前注水-预裂爆破致裂弱化后,破碎顶煤具有散体介质特征。基于现场地质环境与开采条件分析,将弱化后顶煤视为非连续介质,应用颗粒流计算程序PFC(Particle Flow Code),对比分析了急斜煤层高阶段顶煤弱化前后随时间演化规律,为安全开采提供了理论依据。The length of working face by mechanized caving in steep and thick coal seam is shorter,higher section can improve yield and efficiency.However,there are problems like the low release of top coal caving and gas accumulation induced by local top coal caving at a large scale.When a high section of top-coal in Weihuliang coal mine in steep coal seam has been fractured and weaken,the broken top coal has a characteristic of loose medium.Based on the analysis of field geological environment and mining conditions,the weaken top-coal is viewed as a non-continuous medium,applying the particle flow calculation program PFC （Particle Flow Code）,the evolutionary law with time in high section of top coal in steep seam after and before weaking are contrasted and analyzed,which provides a theoretical basis for safe mining.

关 键 词：急倾斜煤层 高阶段 综放开采 PFC 顶煤流动规律 

分 类 号：TD322[矿业工程—矿井建设]