山东煤炭科技2025，Vol.43Issue(1)：27-31,5.DOI:10.3969/j.issn.1005-2801.2025.01.006
近距离煤层下伏煤层巷道顶板破坏特征及控制技术研究
Research on Failure Characteristics and Control Technology of Underlying Coal Seam Roadway Roof in Close Distance Coal Seam
王中平 1骆国华 1史先志2
作者信息
- 1. 毕节市能源局,贵州 毕节 551700
- 2. 贵州钰祥矿业集团投资有限公司,贵州 毕节 551800
- 折叠
摘要
Abstract
The average row spacing between the 6#coal seam and its underlying 9#coal seam is 6.23 m in Sheng'an Coal Mine.After the mining of the 6#coal seam,the roof is broken and sinks significantly of the 9#coal seam working face during the roadway excavation period.The existing anchor net support method can no longer meet the safety production needs.Technologies of FLAC3D numerical simulation,empirical formula calculation,on-site drilling peeping instrument actual measurement and others are adopted to comprehensively study the failure characteristics of the floor rock layer after the mining of the 6#coal seam.It is determined that the plastic failure depth of the 6#coal seam floor can reach 8.5-9.3 m.A collaborative support technology of adopting anchor net+anchor cable+I-beam steel shed is proposed to strengthen the roof control during the roadway excavation period of the 9#coal seam.The subsidence amount of the roof under the condition of erecting I-beam steel shed with different distances of lagging head-on is simulated,and the collaborative support scheme of erecting I-beam steel shed closely following the head-on is determined.The safe stoping of the 9#coal seam is ensured.关键词
近距离/巷道/底板/破坏/支护Key words
close distanece/roadway/floor/failure/support分类
矿业与冶金引用本文复制引用
王中平,骆国华,史先志..近距离煤层下伏煤层巷道顶板破坏特征及控制技术研究[J].山东煤炭科技,2025,43(1):27-31,5.
