摘要
针对大倾角松软特厚煤层综放开采存在的关键技术问题,借助FLAC数值模拟软件确定支架的合理支护强度应为0.6MPa。采用PFC数值模拟方法研究优化了放煤工艺确定放煤步距为1.2m时,顶煤采出率最高;放煤顺序为工作面上端从上向下放煤利于提高支架稳定性;其它部分从下向上放煤利于提高顶煤采出率。提出运用综合技术措施解决大倾角工作面防倒、防滑难题。经现场应用,取得了良好的经济与社会效益。
Aiming at the key technology of fully mechanized top coal caving in extra-thick soft coal seam with great dip angle,determined that the reasonable support strength was 0.6 MPa through FLAC numerical modeling.The caving technology was optimized through PFC numerical modeling,confirmed when the caving step distance was 1.2 m,the top-coal recovery rate was the highest;At the top of working face,caving from top to bottom was in favor of improving support stability;other parts caving from bottom to top was in favor of improving top-coal caving recovery.After being used in the field,the comprehensive technical measure which was proposed to solve the problems of falling and sliding prevention in working face with great dip angle has made favorable benefit both in economy and society.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第11期1878-1882,共5页
Journal of China Coal Society
关键词
大倾角
松软
特厚煤层
综放开采
PFC模拟
防倒防滑
great dip angle
soft
extra thick coal seam
fully mechanized top coal caving
PFC numerical modeling
falling and sliding prevention
作者简介
黄志增（1982-），男，江苏泗阳人，工程师，硕士。Tel：010—84263880，E—mail：huangzhizeng@tdkcsj．com
