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库兹巴斯许多煤矿在厚煤层中掘进断面为20～25米~2巷道时,以及在掘进成套机械化设备的安装峒室时,成功地应用了锥头胀壳式金属锚杆(杆体直径16～20毫米)。为丁支护大断面巷道,按库兹巴斯煤炭科学研
When many coal mines in KuzBass dig tunnel sections with thick coal seams from 20 to 25 m to 2 and when installing tunnels for complete sets of mechanized equipment, the conical head and shell metal bolt (rod diameter 16 ~ 20 mm). For Ding support large section of roadway, according to Kuzbass coal science research