Application Scope
The gas content determination device is primarily used for directly measuring 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 effectiveness, and the compilation of gas geological maps.

Automatic Gas Content Determination Device Product Principle
By drilling directly underground to collect coal cuttings from predetermined depths, the device measures the gas desorption rate and desorption volume of the coal cuttings. A specific mathematical model is used to calculate the gas loss before the coal sample is sealed in the sample container. Laboratory measurements of relevant parameters determine the original gas content and original desorbable gas content. This equipment employs a fixed-point sampling method, with results showing a strong correlation with actual gas emission dynamics and outburst prediction indicators (such as drilling cuttings desorption index and initial gas emission rate). The measurement results meet the requirements for predicting gas emissions and coal-rock dynamic disasters in coal mines. The process technology and accompanying instruments of this achievement have been successfully promoted and applied in many mines.

Automatic Gas Content Determination Device Technical Parameters
Testing Time: <2h
Underground Coring and On-Site Desorption System
Underground Desorption Meter: Single test range 800ml (customizable to 1000ml upon request), high-brightness corrosion-resistant acrylic tube, stable base, clear graduations;
Underground Desorption Cylinder Accuracy: 2ml; Single range 800ml or 1000ml.
Underground Desorption Time: 0-30min;
Coal Sample Can: Material stainless steel/alloy, capacity over 800g;
Surface Gas Desorption System
Pressure Sensor Range: 10Kpa
Pressure Sensor Accuracy: 0.1% FS
Temperature: 0℃～100℃
Atmospheric Pressure: 600hpa-1100hpa
Coal Sample Weighing System
Digital Electronic Balance Maximum Capacity: 2000g
Electronic Balance Sensitivity: 0.1g
Power Supply Voltage: 220v
Ambient Temperature: 5-35℃
Power: 5W
Coal Sample Weighing Containers: 100g and 200g each
Coal Sample Weighing Scoops: 50g and 100g each
Coal Sample Crushing and Desorption System
Crusher Feed Particle Size: ≤30mm;
Crusher Discharge Particle Size: 40-180 mesh;
Operating Power Supply: 220V, 50HZ;
Single Feed Capacity: ≤1000g/bowl;
Crushing Time: Adjustable (0-5)min;
Motor Power: 0.75kW
Crusher Features: Low noise, effective crushing.
Moisture Determination System
Maximum Load: 110g
Minimum Division Value: 5mg
Minimum Sample Size: 0.5g
Moisture Determination Accuracy: 0.1g%
Data Processing System
Software Operating Environment: Windows XP, Win7 systems;
Software Main Functions: User management, data process report output, experimental result report output, experimental data report output, gas content W value calculation, desorbable gas content Wa, residual gas content Wc calculation, gas pressure P calculation, cumulative gas desorption volume Q calculation, report output, printing, and help.

Zhengzhou Aidi produces Automatic Gas Content Determination Device supplies coal drilling cuttings desorption meters, deep hole sampling devices, pressure gauges, geological exploration desorption meters, borehole flow meters, mine drainage and outburst prevention equipment, coal true density determination instruments, gas content determination instruments, automatic initial gas emission rate meters, diffusion rate meters, coal drainage pipeline gas parameter instruments, borehole coal powder circulation devices