Flame retardant communication cable for coal mine is a special communication cable for coal mine with mechanical strength, moisture resistance, anti-static and flame retardant properties suitable for the mine environment. Identification and length marking of mine communication cable; There are identification marks on the outer surface of the cable with an interval of no more than 1m. The contents of the marks include: conductor diameter, number of pairs, cable model, manufacturer name code and year of manufacture. The length mark is marked on the outer surface with an interval of no more than 1m, but it is staggered with the above marks. The mining communication cable adopts full chromatographic insulation and aluminum plastic composite sheath (that is, the longitudinal shielding aluminum tape of the cable is bonded with the sheath to form a sealed sheath), which is characterized by superior electrical performance and convenient construction. MHYV (1 × 2 2 × 2 1 × 4 5 × 2) × 7/0.28 Polyethylene insulated polyethylene sheathed mining communication cable for coal mine is used in drift inclined roadway and electromechanical chamber MHJYV 4/0.28 copper wire+3/0.28 steel wire 1 × 2 2 × 2. Reinforced core polyethylene insulated and sheathed mining communication cable for coal mine is used in drift and inclined roadway with high mechanical damage MHY 1/0.8 (20 × 2 30 × 2 50 × 2) × 0.8 Polyethylene insulated aluminum polyethylene adhesive layer polymer sheathed mining communication cable for coal mine is used for wet inclined shaft and drift MHYA32 (30 × 2 50 × 2 80 × 2) × 0.8 Polyethylene insulated aluminum polyethylene adhesive layer steel wire armored poly sheathed mine communication cable for use in shafts and inclined shafts MHYVR flexible communication cable with polyethylene insulation and sheath for coal mine MHYVP polyethylene insulated braided shielded polymer sheathed communication cable for coal mine MHYVRP flexible communication cable with polyethylene insulation, braided shield and poly sheath for coal mine MHY32 Polyethylene insulated steel wire armored polymer sheathed communication cable for coal mine MHVV (HUVV) mining polyinsulated flame-retardant polysheathed cable is used in drift, inclined roadway and electromechanical chambe MHJYV (HUJYV) mining polyethylene insulated flame-retardant polymer sheathed reinforced flexible cable with good tensile strength MHYBV (HUYBV) mining polyethylene insulated galvanized steel wire braided armored flame-retardant polymer sheathed communication cable is used for drift and inclined drift with high mechanical impact MHYBV (2~10) × two × (0.75～1.5)mm2 MHYBV 1X(2～7)X(0.75-1.5)mm2 MHY (HUY) mining polyethylene insulated aluminum/plastic composite tape shielded flame-retardant polymer sheathed communication cable is used as communication line in wet inclined shaft and drift MHYA32 (HUYA32) mining polyethylene insulated aluminum/plastic composite tape shielded steel wire armored flame-retardant polymer sheathed communication cable is used as communication line in coal mine shaft or inclined shaft MHVV32-4（4 × 1.5) Mine flame-retardant composite communication cable is used as communication line in coal mine shaft or inclined shaft MHPVP3V32-7（2 × two × 0.5＋1 × 0.5＋2 × 6.0) Flame retardant composite communication cable for coal mine is used as communication line for coal mine shaft or inclined shaft MHYVRPZ Mining Polyethylene Insulated Aluminum/Plastic Composite Tape Shielded Braided Armored Poly Sheathed Flexible Communication Cable for Inclined Shaft and Drift1. Wire: annealed bare copper wire, the diameter of copper wire is 0.30, 0.42, 0.52, 0.60, 0.70, 0.80, 0.90 (mm). 2. Insulation material: high-density polyethylene or polypropylene, and the color of the insulated wire shall be marked according to the full color spectrum standard. 3. Insulated wire pair: Twist two insulated wires of different colors into pairs according to different pitches, and use the specified chromatographic combination to identify the wire pair. 4. Communication cable core structure: with 1 pair as the basic unit, more than 25 pairs of cables are combined by unit, and each unit is tied with a unit cable tie with a specified color spectrum to identify different units. Cables with 100 pairs and above have 1% reserve pairs, but no more than 6 pairs. The gaps in the cable core are filled with petroleum jelly. 5. Cable core tape: wrapped with polyester film tape. 6. Shielding: Copper wire shielding or embossed (or not embossed) metal tape, the metal tape is longitudinally wrapped outside the core tape of the communication cable. 7. Sheath: blue high-density polyethylene. Double-jacketed communication cables are also available.