【摘要】：為研究直墻半圓拱煤巷松動圈的分布規(guī)律,運(yùn)用力學(xué)分析和應(yīng)力波理論對松動圈形成機(jī)理進(jìn)行了解釋,以某礦11713回風(fēng)巷為工程實例,采用Midas/GTS-FLAC~(3D)耦合模擬技術(shù)對松動圈形成過程進(jìn)行了模擬,得出該類型巷道松動圈呈"蝴蝶"形,同時定義了數(shù)值模擬中松動圈厚度的計算方法。為驗證模擬結(jié)果的可靠性,運(yùn)用超聲波測試法對該巷松動圈厚度進(jìn)行了現(xiàn)場測定。結(jié)果表明:松動圈厚度實測值為1.8~2.0 m,與數(shù)值模擬得到的2.0 m非常接近,圍巖類別為Ⅳ,巷道支護(hù)方式由U型棚支護(hù)改為錨聯(lián)網(wǎng)支護(hù),支護(hù)能有效控制圍巖變形,可以在工程中推廣應(yīng)用。
[Abstract]:In order to study the distribution law of loose ring in vertical wall semi-circular arch coal roadway, mechanical analysis and stress wave theory are used to explain the formation mechanism of loosening ring. Taking 11713 return air tunnel of a mine as an engineering example, The forming process of loosening circle is simulated by Midas/GTS-FLAC~ (3D) coupling simulation technology. The loosening circle of this type of roadway is found to be "butterfly", and the calculation method of loosening ring thickness in numerical simulation is defined. In order to verify the reliability of the simulation results, the thickness of the loose ring in the roadway was measured by ultrasonic testing method. The results show that the measured value of loose ring thickness is 1.8m, which is very close to the value of 2.0 m obtained by numerical simulation, and the surrounding rock type is 鈪，

本文編號：2361819