煤矿安全2012，Vol.43Issue(12)：65-68,4.
极近距离煤层下分层开采矿压显现规律
Strata Behavior Laws in Lower Slicing Mining of Contiguous Seams
蒋升 1孔杰 1钟宜涛 2王敏2
作者信息
- 1. 山东里能鲁西矿业有限公司,山东济宁272053
- 2. 山东科技大学矿山灾害预防控制国家重点实验室,山东青岛266510
- 折叠
摘要
Abstract
Overlying strata movement laws of lower slicing in Luxi Coal Mine is studied by workface support force,deformation of the surrounding rock,borehole stress,anchor working resistance and hydraulic prop stress in crossheading.The results show that initial caving interval of the immediate roof in lower slicing is 15.6 m and the upper is 26.1 m.Initial caving interval of the main roof is 31.8 m and periodic weighting length is between 10~13 m.The average resistance of hydraulic-support-ZY4800/18/38 in workface is 27.2 MPa,which is 86.4% of the rated.The hydraulic-supports have better adaptability.Through the analysis of abutment pressure distribution characteristic in rail crossheading and belt crossheading,influence scope of advanced support pressure is 24.6 m in rail crossheading,and it is 31.135 m in belt crossheading.关键词
极近距离开采/矿压观测/超前支承压力/来压步距Key words
contiguous seams mining/mine pressure monitoring/advance abutment pressure/roof weighting interval分类
矿业与冶金引用本文复制引用
蒋升,孔杰,钟宜涛,王敏..极近距离煤层下分层开采矿压显现规律[J].煤矿安全,2012,43(12):65-68,4.
