Project Case of Underground Liquid Preparation & Centralized Remote Control System for a Coal Mine in Shanxi
Project Background
Industry Requirements
In accordance with the intelligent construction standards for coal mines, underground liquid supply systems shall realize automatic proportioning, online monitoring, unattended operation and remote management. The traditional manual liquid preparation mode shall be phased out to meet the construction requirements of intelligent mines.
Pain Points of Conventional On-site Systems
● Inaccurate proportioning: Large concentration fluctuations in manually prepared liquid cause damage to hydraulic supports and valve components, leading to high equipment failure rates.
● High labor cost: Dedicated staff are required for liquid preparation and patrol inspection, resulting in a large number of underground posts.
● Substandard water quality: Raw water with high hardness and abundant impurities easily causes demixing and deterioration of emulsion.
● Lack of intelligent monitoring: Real-time data monitoring is unavailable; faults can only be detected after occurrence, disrupting continuous production.
Construction Value
Reduce manpower and improve efficiency, cut equipment operation and maintenance costs, stabilize liquid supply quality, eliminate hidden dangers caused by manual operations, and satisfy acceptance standards for intelligent coal mines.
Project Solution
Construction Objectives
Achieve fully automatic precise proportioning of emulsion at 3%–5% with a proportioning accuracy of ±0.2%; realize unattended equipment operation, automatic early warning and remote control, and maintain stable qualified liquid supply.
Five Core System Units
● Water Quality Purification Unit
Multi-stage filtration and water softening treatment are adopted to guarantee qualified water quality and prevent emulsion deterioration.
● Oil Supply Unit
Explosion-proof oil storage and precise metering oil delivery are equipped to supply emulsified oil on demand.
● Automatic Proportioning Unit (Core Module)
Adopts PLC closed-loop control to detect concentration in real time, dynamically adjust the oil-water ratio and complete automatic homogeneous mixing.
● Liquid Storage & Supply Unit
Features large-capacity liquid storage and high-pressure backwashing filtration to deliver constant-pressure liquid supply to working faces.
● Intelligent Management & Control Unit
Supports local touch screen operation and remote monitoring, with functions including data archiving, fault alarm and one-click start/stop.
Core Advantages
High proportioning accuracy, full-process automation, labor and energy consumption reduction, explosion-proof safety, traceable data, and adaptability to harsh underground working environments.