摘要
象山矿井南一5号煤层轨道下山巷道围岩为破碎和软弱煤岩体,且围岩应力场复杂,多年来受煤矿静压和采动影响,原有锚杆支护遭到严重破坏,轨道下山围岩收缩、内移明显,主要显现为顶板下沉、底板鼓起、两帮出现开裂,严重影响巷道的正常使用,给矿井安全开采带来重大安全隐患。针对5号煤层轨道下山在采动区域叠加动压影响下,大跨度巷道围岩地质环境及巷道变形特点,实施了保压胶结注浆技术,充分胶结固化围岩,提升了围岩的预应力,保证了巷道支护的长期稳定。
The surrounding rock of No.5 coal mine of south No.1 mining area track downhill roadway in Xiangshan Mine is fragmented and weak,and the stress field of the surrounding rock is complex.Over the years,due to the impact of coal mine static pressure and mining,the original bolt supporting has suffered severe damage,and the surrounding rock of the track downhill has shrunk and moved inward significantly,mainly manifested as roof subsidence,floor bulging,and cracking of the two sides,which seriously affects the normal use of the roadway and brings significant safety hazards to the safe mining of the mine.In response to the geological environment and deformation characteristics of the surrounding rock of the large-span roadway under the influence of dynamic pressure in the mining area of the No.5 coal seam track downhill,the pressure-maintaining bonding grouting technology was implemented to fully bond and solidify the surrounding rock,enhance the prestress of the surrounding rock,and ensure the long-term stability of the roadway supporting.
作者
侯挺
聂谦
薛兴伟
李明远
Hou Ting;Nie Qian;Xue Xingwei;Li Mingyuan(Xiangshan Mine,Shaanxi Coal Hancheng Mining Co.,Ltd.,Hancheng 715400,China;Huaibei Pingyuan Soft Rock Support Engineering Technology Co.,Ltd.,Huaibei 235000,China)
出处
《煤炭科技》
2025年第4期189-192,共4页
Coal Science & Technology Magazine
关键词
叠加动压
保压胶结
预应力
锚注
superimposed dynamic pressure
pressure-maintaining bonding grouting technology
prestress
anchor grouting
