Technical Target
By isolating oxygen and moisture penetration, it reduces oxidative deterioration of coal and maintains coal quality indicators.

Technological Overview
Spraying on coal pile surfaces forms a dense 2–5 mm thick protective film, which encloses coal, prevents wind and isolates air. On the basis of sealing, inert gases (N₂, CO₂) can be injected into the coal pile simultaneously to enhance prevention and control effects.

Technical Characteristics
(1) High construction efficiency and excellent oxygen barrier effect.
(2) Multifunctional, preventing spontaneous combustion and suppressing dust.
(3) Low dosage, low solid content of active ingredients, with no impact on coal quality.
(4) Good ductility and strength, strong damage resistance.
(5) Non-toxic, odorless, non-corrosive, harmless to personnel and equipment.

Conventional Application Process for New Barrier Materials
Use a special sprayer to evenly apply the new barrier material on the material surface. If inert gas injection is required, insert slurry perforated pipes into the coal pile in advance before spraying.

Mobile Intelligent Spraying Application Process for Barrier Materials
The new barrier material is evenly sprayed on coal pile surfaces using mobile, liftable intelligent spraying equipment, which supports unmanned operation and remote control via high-definition imaging, achieving all-round spraying on coal pile surfaces.

(1) Operators control the equipment via a handheld controller, greatly reducing labor intensity.
(2) The unmanned visual spraying system enables effective spraying on slope tops, ensuring operator safety.
(3) The device is equipped with a material handling mechanism, significantly reducing labor intensity and improving efficiency.
(4) The monitoring system visualizes the spraying effect, and remote control of monitoring and nozzle positions enables convenient and efficient spraying.
(5) The device features mature technology, simple overall structure, convenient maintenance and reliable performance.