Shandong Energy Zibo Mining Group Corporation Limited Shandong Provincial Research Centerof Backfill Mining Engineering and Technology Postdoctoral Research Station,Zibo Mining GroupCorporation Limited MOE Key Lab of Deep Coal Resources and Mining,School of Mining,China University of Mining and Technology

为研究直墙半圆拱煤巷松动圈的分布规律,运用力学分析和应力波理论对松动圈形成机理进行了解释,以某矿11713回风巷为工程实例,采用Midas/GTS-FLAC3D耦合模拟技术对松动圈形成过程进行了模拟,得出该类型巷道松动圈呈"蝴蝶"形,同时定义了数值模拟中松动圈厚度的计算方法。为验证模拟结果的可靠性,运用超声波测试法对该巷松动圈厚度进行了现场测定。结果表明:松动圈厚度实测值为1.82.0 m,与数值模拟得到的2.0 m非常接近,围岩类别为Ⅳ,巷道支护方式由U型棚支护改为锚联网支护,支护能有效控制围岩变形,可以在工程中推广应用。

in order to study the distribution law of the loose rings in the semicircele arch seam gateway with the vertical sidewalls,the mechanicsanalysis and the stress wave theory were frstly aplied to explain the formation mechanism of the loose rings. Secondliy,based on No.11713 air return gateway of a mine as an engineering case,a Midas/GTS-FLAC~(3D)couping simulation technology was appied to simulate the formation process of the loose rings,the loose rings obtained of the type gateway was in a " butterfly"form and meanwhile the calculation method of the loosering thickness in the numerical simulation was defined. n order to verfy the reliability ofthe simulation results, an ultrasonic wave measuring method was applied to the site measurement on the loose ring thickness of the gateway.The results showed that the actual measured value of the loose ring thickness was 1.8~ 2.0 m and was much closed to 2.0 m obtained from the numerical simulaton.The surrounding rock type was lV,thesupport method of the gateway was changed from the U type shield support to the bolft and steel mesh suppor,the support nethod could effectively control the deformation of the surrounding rock and could be promoted and applied to the engineering

山东省泰山学者专项经费资助项目(201309)；