Performance Characteristics of ZWS-1 Borehole Initial Gas Emission Velocity Tester
Compact structure, lightweight, simple operation, easy to use, stable performance, rapid testing, and intuitive readings make it suitable for on-site use in coal mines, with application value in outburst-prone mines.
Primarily used for directly measuring the initial gas emission velocity from coal seams in mining faces of coal mines to predict the risk of gas outbursts. The ZWS-I Gas q-Value Tester provides a portable and rapid testing instrument for predicting outburst risks in coal seam mining faces. It can be used by coal mine disaster prevention departments, coal research institutions, and for measuring parameters such as gas emission volume in coal seam drainage boreholes. It is suitable for use in hazardous environments with gas presence.
The ZWS-1 Gas q-Value Tester consists of a dust filter, housing, panel, and shoulder strap. The panel is equipped with a flow display, intake nozzle, and shift flow meter, connected via hoses and quick-seal couplings. Gas enters the flow display and shift flow meter through the intake nozzle and hose. Due to the throttling effect of the shift flow meter, the gas pressure in the sealed chamber increases, causing the flow display pointer to swing, thereby measuring the initial gas emission velocity from the borehole.
The ZWS-1 Borehole Initial Gas Emission Velocity Tester is a throttling differential pressure flow meter that operates on the principle of flow measurement. After a borehole is formed in the coal seam, the permeability of the coal seam increases due to the formation of fractured and plastic zones around the borehole, allowing gas to flow into the borehole. At the initial moment after sealing the borehole, the free gas pressure in the sealed chamber is relatively low compared to the gas pressure in the coal seam. However, due to the gas pressure gradient, gas flows into the sealed chamber, resulting in an increase in pressure and creating a differential pressure with the external environment. The instrument tests the gas emission volume.
Technical Parameters of ZWS-1 Borehole Initial Gas Emission Velocity Tester
Measurement Range: 0.5–30 L/min
Accuracy Class: At ambient temperature of 20±10°C, ±2.5% for 10%–90% range, and ±4% for below 10% and above 90%.
Weight: 0.97 kg
Dimensions: 155×100×125 mm
Operating Environment Conditions: -25 to 55°C, relative humidity ≤85%

Zhengzhou Aidi produces and supplies coal drill cuttings desorption instruments, deep-hole sampling devices, pressure testers, geological exploration desorption instruments, borehole flow meters, mine drainage and outburst prevention equipment, true density testers for coal, gas content testers, automatic initial gas emission velocity testers, diffusion velocity testers, gas parameter testers for coal drainage pipelines, and borehole coal powder circulation devices.