Central tube type flame-retardant and fire-resistant optical cable for mining

The utility model discloses a central tube type flame-retardant and fire-resistant optical cable for mining, which comprises optical fiber or optical-fiber ribbons (1), wherein the optical fiber or the optical-fiber ribbons (1) are sleeved in a loose tube (3) filled with water-resistant matters (2) in parallel, a water-resistant layer (4) is arranged outside the loose tube (3), a metal composite belt (5) is arranged outside the water-resistant layer (4), an inner jacket (7) with a reinforcement (6) is prepared outside the metal composite belt (5), a fire-resistant layer (8) is arranged outside the inner jacket (7), and a flame-retardant outer sheath (9) is arranged outside the fire-resistant layer (8). By adopting the multiple layers of flame-retardant and fire-resistant protection, the central tube type flame-retardant and fire-resistant optical cable for mining is capable of well protecting the optical fiber in the cable to work for a longer time under the conditions of high temperature and mass fire burning, so that economic loss is reduced.