围岩巷道中穿层测压钻孔封孔长度研究

Study on Sealing Length of Pressure Measurement in Rock Tunnel

为了掌握巷道围岩应力对穿层钻孔封孔长度的影响,利用数值模拟软件建立巷道围岩应力分布数值模型,模拟不同的围岩应力情况下巷道应力的分布情况,找出围岩应力的分布规律,确定不同围岩应力状态下巷道围岩应力集中区的分布范围。提出穿层钻孔封孔长度应大于巷道围岩应力集中区的观点,并在实验矿井进行了实际验证。现场实验结果表明,利用模型模拟出的测压钻孔封孔长度能够满足测压要求,为穿层钻孔测压封孔长度的确定提供了理论支持,具有实际应用价值。

In order to discuss the effect of stress in roadway surrounding rock to sealing length, it use numerical simulation software to establish the roadway surrounding rock stress distribution of numerical model, it simulation stress distribution of different tunnel stress, it find out the laws of stress distribution in surrounding rock stress and determine the stress concentration area in different roadway stress. It propose that sealing length should be longer than stress concentration area of surrounding rock, and test it in experimental mine. The experimental results shows that the length of sealing through simulate model is requirement, it provide theoretical support for sealing length, it have application value.