摘要
针对泉店煤矿22采区轨道下山地质条件的复杂性及其稳定性控制的重要性,采用理论分析和现场监测等方法,分析了轨道下山围岩变形破坏特征,揭示了轨道下山围岩变形破坏机理,从改变围岩结构、实现有限让压、减少支护成本的角度,提出了高应力软岩巷道分级让压支护技术和控制对策,确定了轨道下山控制方案。研究结果表明,采用分级让压支护技术有效控制了高应力软岩巷道围岩有害变形。轨道下山顶底板最大移近量388 mm,两帮最大移近量285 mm,确保了轨道下山围岩安全稳定。
Due to the complex geological conditions of the mining area No. 22 of Quandian Mine and the great significance of its stability control, the deformation and failure characteristics of the surrounding rock of the roadway were analyzed. The deformation and failure mechanism of the surrounding rock in the roadway were revealed. Using theoretical analysis and field monitoring, the complications of the track downhill support of the heavily stressed soft rock were resolved. Grading yielding support technology and control measures in the roadway of the heavily stressed soft rock were put forward by changing the structure of the surrounding rock, achieving limited yielding, and reducing supporting costs. The control scheme in the process of the roadway was determined. The results showed that dangerous deformations of the surrounding rock in roadways of the heavily stressed soft rock could be effectively controlled by grading yielding support technology. The maximum displacement of the roof and floor in the process of the track downhill was 388 mm and the maximum displacement of the two sides was 285 mm, which ensured the safety and stability of the surrounding rock in the track dip.
作者
廖伟峰
刘志松
王彬
Liao Weifeng;Liu Zhisong;Wang Bin(Xingan Land Resource Bureau, Ji＇an 331200, China;Guqiao Mine, Huainan Mininglndustry Group Ltd., Huainan 232174, China)
出处
《煤炭与化工》
CAS
2017年第11期26-28,33,共4页
Coal and Chemical Industry
关键词
高应力软岩
变形机理
控制方案
分级让压支护
heavily stressed soft rock
deformation mechanism
control scheme
grading yielding support
