1232运巷过陷落柱段围岩破坏特征及预注浆加固技术研究
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摘要
为解决1232工作面运巷过陷落柱段围岩变形量大及易冒顶的问题,通过分析巷道掘进过陷落柱段围岩的破坏特征,提出采用超前预注浆加固+锚杆(索)支护的方式控制围岩变形,根据运巷的具体情况对注浆及锚杆(索)的参数进行设计,并进行矿压观测,安全顺利地通过了陷落柱。
In order to solve the problem of large deformation and easy roof fall of surrounding rock in the haulage roadway of the 1232 working face, by analysing the failure characteristics of surrounding rock in the section of collapse columns in the process of tunnelling, advanced pre-grouting reinforcement and bolt(cable) support are proposed to control the deformation of surrounding rock. According to the specific conditions of the roadway, the parameters of grouting and bolt(cable) are designed, and the ground pressure observation is carried out to pass the collapsed column safely and smoothly.
In order to solve the problem of large deformation and easy roof fall of surrounding rock in the haulage roadway of the 1232 working face, by analysing the failure characteristics of surrounding rock in the section of collapse columns in the process of tunnelling, advanced pre-grouting reinforcement and bolt(cable) support are proposed to control the deformation of surrounding rock. According to the specific conditions of the roadway, the parameters of grouting and bolt(cable) are designed, and the ground pressure observation is carried out to pass the collapsed column safely and smoothly.
引文
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