Abstract:

Although effective volume and empty volume of water sump are important to drainage safety of coal mine, there are seldom study on monitoring them, thus trouble in safety is hidden . This paper, according to the layer phenomenon in water and the structure of water sump, calculated effective volume and empty volume of water sump based on water level and slime thickness, and designed two floats level sensor and float combined with ultrasonic wave level sensor that could detect slime thickness directly or indirectly and water level, which provided reference to apply dynamic monitoring on water sump in coal mine.