Continuous real-time monitoring method for height of water flowing fractured zone of coal seam roof

• Main Author: WANG CHANGSHEN
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2018
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

Provided is a continuous real-time monitoring method for the height of a water flowing fractured zone of a coal seam roof. The method comprises the following steps: arranging at least three to five properly water-filling pitching monitoring holes in roadways on two sides of a working surface in an advancing manner towards a stope direction of a working surface and monitoring a section control range in order to capture the general shape of the water flowing fractured zone, wherein hole-bottom vertical height is more than the estimated height of the water flowing fractured zone; linearly arranging multiple liquid pressure sensors in the water-filling pitching monitoring holes, wherein each liquid pressure sensor is connected with a liquid pressure data acquisition instrument outside holes inparallel through a single channel; and analyzing pressure background value of liquid pressure in the monitoring holes by the liquid pressure data acquisition instrument and utilizing the stair-stepping attenuation sudden-cha