Manufacturer of Direct Gas Content Determination Device DGC-1

The Direct Gas Content Determination Device DGC-1 has currently passed industrial trials at Huainan Mining Bureau and Jincheng Anthracite Mining Group. It uses the core sampling method for determination, with measurement errors significantly smaller than those of the drill cuttings index method. The measurement results show a strong correlation with actual gas emission dynamics and outburst prediction indicators (drill cuttings desorption index and initial gas emission velocity). The equipment's results meet the requirements for predicting coal mine gas emissions and coal-rock dynamic disasters. The technology and accompanying instruments of this achievement have been successfully promoted and applied in various mines of the Huainan Mining Bureau in China.

Product Introduction of Direct Gas Content Determination Device DGC-1

The Direct Gas Content Determination Device DGC-1 is primarily used for determining the original gas content of coal seams and the original desorbable gas content of coal seams. It can be applied in gas emission prediction, outburst risk assessment for working faces and regions, evaluation of pre-drainage gas effects, and the compilation of gas geological maps. By directly drilling underground to extract coal cores at predetermined depths, the gas desorption rate and desorption volume of the coal cores are measured. A specific mathematical model is used to calculate the gas loss before the coal sample is sealed in the sample cylinder. Laboratory measurements of relevant parameters are then used to calculate the original gas content and original desorbable gas content. This process and equipment feature short measurement times, generally less than 8 hours; reduced engineering workload compared to indirect methods for determining coal seam gas content, resulting in lower costs; minimal influence from geological structures on measurement location selection, allowing for point measurements; and high reliability and accuracy, with precision exceeding gas content measurements during geological exploration.

Technical Parameters of Direct Gas Content Determination Device DGC-1

1 Underground Core Sampling System and Underground Desorption System

Core tube diameter: ￠73, ￠90

Number of multiple samples per extraction: 5

Core drilling inclination angle: >0°

Required desorption time underground: 30min

Underground desorption tube range: 800ml

Underground desorption tube accuracy: 2ml

2 Surface Gas Desorption System

Power supply: 220V

Desorption tube accuracy: 2ml

Desorption tube range: 1000ml/tube, 1500ml/tube

Micro vacuum pump air extraction rate: 3L/min

Micro vacuum pump vacuum degree: 65KPa

Thermometer: -50～0～500℃

Electronic barometer: 977hPa～1050hPa

3 Weighing System

Weighing capacity: 3000g

Sensitivity: 0.1g

Tare range: 3000g

Stabilization time: <3S

Weighing pan diameter: ￠130mm

Ambient temperature: 5～35℃

Power supply voltage: 220v（＋10％～－15％）

Power consumption: 5W

4 Coal Sample Crushing System

Material of mortar: High manganese steel

Feed particle size: ≤26mm

Discharge particle size: 80-200 mesh

Working power supply: 220V, 50HZ

Feed quantity per batch: ≤1000g/mortar

Crushing time: 3-5min

Total machine weight: 160Kg

Motor power: 1.5KW

5 Moisture Determination System

Load: 110g

Graduation value: 5mg

Differential scale reading range: 0～1 

Moisture determination accuracy: ±0.2g%

Temperature adjustment range: 75℃～160℃

Weighing pan diameter: ￠100mm

Power supply and power consumption: 220V   50HZ    260W

6 Data Processing System

Software operating environment: This software runs on Windows XP and Win7 systems.