摘要
软岩巷道底鼓是软岩巷道底板支护的重要问题之一,其长期制约着煤矿安全高效生产。为此,以榆神矿区某矿30112回风顺槽为研究对象,通过理论分析、数值模拟确定巷道底鼓类型属"应力型",巷道在重复采动影响下帮角、底角、底板出现明显塑性破坏。针对底鼓产生原因,提出"帮脚锚杆+底角锚杆+混凝土"复合支护技术。实测结果表明,优化支护参数后巷道底板底鼓量最大不超过16 mm,底鼓最大变化量不超过2 mm/d,取得了良好的现场应用效果。
Floor heave in soft rock roadways is one of the important problems of floor support,which limits the safe and efficient production of coal mines for a long time.To solve this problem,taking the 30112 return air chute of a mine in the Yushen mining area as an example,this work studies the mechanism of the floor heave and suggests a new technical approach.Theoretical analysis and numerical simulation determine that the floor heave in this roadway is of the"stress type".It means that due to the influence of repeated mining vibration,obvious plastic failure occurs at the slope angle,floor angle and floor.In view of this cause,this work proposes a compound support technology of"side anchor+bottom angle anchor+concrete".The measured results show that the maximum floor heave of roadway is less than 16 mm and the maximum variation of floor heave is not more than 2 mm/d after optimizing support parameters using the new technology,implying a good effect in controlling the floor heave.
作者
高晓旭
石新禹
郭卫彬
GAO Xiaoxu;SHI Xinyu;GUO Weibin(Xi'an University of Science And Technology,Xi'an,Shaanxi 710054;Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education,Xi'an,Shaanxi 710054)
出处
《地质与勘探》
CAS
CSCD
北大核心
2020年第5期1087-1095,共9页
Geology and Exploration
基金
陕西省创新能力支撑计划(科技创新团队)(编号:2018TD-038)
国家自然科学基金青年项目(编号:52004205)联合资助。
关键词
软岩巷道
重复采动
应力型底鼓
数值模拟
控制技术
榆神矿区
soft rock roadway
repeated mining
stress type bottom heave
numerical simulation
control technology
Yushen mine
