The WD-MKYJY33-450/750V Halogen-Free Low-Smoke Mining Control Cable (2×10mm² specification) is a special cable designed for harsh underground coal mine environments. Its characteristics and parameters are as follows:


I. Structural and Material Characteristics


Conductor and Insulation Layer


Conductor features high purity oxygen-free copper core, single-core cross-sectional area of 10mm², DC resistance ≤1.83Ω/km (at 20℃), and supports long-term operating temperature from -15℃ to 90℃.
The insulation is cross-linked polyethylene (XLPE), with high temperature resistance (short-circuit temperature 250℃), and voltage withstand ≥3kV/5min without puncturing.


Shielded and armored


The armor layer is constructed with double-layer galvanized steel strips, offering a compressive strength of ≥3000N/100mm, suitable for underground rock falls and mechanical squeezing environments.
The protective sleeve is made of low-smoke, halogen-free polyolefin material, with an oxygen index of ≥28, releasing no halogen acid gases during combustion, and a smoke light transmittance of ≥60%.
II. Performance Parameters
Electrical Characteristics: Rated Voltage 450/750V, suitable for underground control circuits and monitoring systems; insulation resistance常态≥500MΩ·km.
Fire Retardant Safety: Meets the MT818.14 mining standard, passes the GB/T 18380.12 bundled combustion test, and self-extinguishes within 30 seconds at 800°C.
Environmental Adaptability: Grade IP54, corrosion-resistant, rodent-proof, static bending radius ≥ 12 times the outer diameter, dynamic bending radius ≥ 20 times.
Section 3: Application Scenarios
Downhole Control Network: Connects gas monitoring sensors, ventilation systems, and other equipment, supporting signal transmission and electromagnetic interference resistance (shielding efficiency ≥ 65dB).
Power Distribution System: For low-voltage power distribution equipment underground, controlling power for critical equipment such as lighting and drainage.
Section 4: Installation and Maintenance Recommendations
Laying Requirements: Parallel spacing with power cables ≥300mm, intersection angle ≥30°, armor layer must be grounded.
Maintenance Points: Regularly inspect sheath wear and shielding integrity, and use heat-shrinkable sleeves for sealing at junctions.


This cable boasts halogen-free, low-smoke properties, high flame retardancy, and robust mechanical protection, making it an ideal choice for safe transmission in underground coal mines.