摘要
针对1366工作面回采巷道中围岩破碎的问题和巷道变形量大、底鼓、支护失效等现象,设计了巷道全断面分次注浆加固方案及渗透注浆工艺,确定了合理的注浆压力和浆液扩散半径。通过数值模拟对注浆前后围岩应力、塑性区分布、表面位移情况进行注浆加固效果预测。现场应用和监测表明:采用全断面分次注浆方案对回采巷道进行注浆加固后,巷道变形量大幅度缩小、巷道受力均匀、应力集中降低,与数值模拟结果基本一致。注浆加固方案有效加固了1366回采巷道围岩,控制了巷道围岩的稳定性,可为相似条件下巷道围岩控制提供参考。
This study proposes a fractional grouting reinforcement scheme of the roadway with full section to tackle surrounding rock breakage in the stoping roadway of 1366 working face and roadway deformation,floor heave and support failure.The infiltration grouting process is adopted to determine reasonable grouting pressure and grout diffusion radius for full section reinforcement.The stress,plastic zone distribution and surface displacement of surrounding rock before and after grouting are forecast through numerical simulation.Field application and monitoring show that:after the full section fractional grouting scheme is used to reinforce the mining roadway,the roadway deformation is considerably reduced,the roadway force is balanced,and the stress concentration is alleviated,which is basically consistent with the numerical simulation results.The grouting reinforcement scheme works to strengthen the surrounding rock of 1366 mining roadway,maintain the stability of surrounding rock of roadway,and provided references for the control of surrounding rock of roadway under similar conditions.
作者
张立新
魏秀杰
刘广超
Zhang Lixin;Wei Xiujie;Liu Guangchao(Collage of Mining,Liaoning Technology University,Fuxin Liaoning 123000,China)
出处
《矿业科学学报》
CSCD
2023年第4期583-592,共10页
Journal of Mining Science and Technology
基金
国家自然科学基金(52174116)。
关键词
全断面分次注浆
渗透注浆
注浆压力
扩散半径
the full section fractional grouting
permeation grouting
grouting pressure
diffusion radius
