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我队有个别平硐穿过断层涌水地带,掘进工作极2．后圆环(图2)用直径16毫米的钢条,两端设成扁平,并在扁平面上各钻一小孔,其大小与临时支架杆上的小孔相同,即直径10毫米。并将它弯曲,作成两个活动半圆,两个半圆合起来的直径和平硐支架横梁直径相同,一般是600-700毫米,它的两单半圆合成如图3。3．前钢条半环的直径大小和后圆环同,即600-700毫米,如图4所示。4．前铁丝半环与前钢条半环相扣合,
My team has a number of adventures through the fault gushing zone, driving a very pole 2. The rear ring (Figure 2) is made of steel rod 16 mm in diameter with flat ends on both ends and a small hole drilled in the flat surface of the same size as the hole in the temporary support rod, ie 10 mm in diameter. And bend it, making two activities semicircle, the diameter of the two semicircles together with the diameter of the beam of support tunnel is the same, usually 600-700 mm, and its two single semicircles are synthesized as shown in Figure 3.3. The diameter of the front half-ring of the steel ring is the same as the diameter of the back ring, ie 600-700 mm, as shown in Figure 4. 4. Former wire half ring and the former steel half-ring together,