| 摘要 |
FIELD: mining.SUBSTANCE: measurement of relative variation of radiation temperature of the surface of the working face of the bed is made remotely at the distance of 1.0-1.5 m in 3-5 m throughout the long face length; with that, at each measurement point an average value obtained at least in 30 measurement cycles is considered, and a boundary of the protected zone is accepted as distance from a contact line of the bed to the worked-out space to a fixation point of stabilisation of a radiation temperature value. As per the method for determining boundaries of protected zones in long faces of coal beds, remote measurement of relative variation of radiation temperature (infrared radiation intensity) of the surface of the working face of the bed is performed. The first measurement is made at a point at the distance of 3-5 m from a stable hole or a strike entry; the following measurement points are located at equal distance in 3-5 m throughout the long face length. At least 5 point measurements are made at each measurement point. After completion of each measurement cycle for each point in a cycle there calculated are average values. As per average values of at least 30 measurement cycles there built is a chart of relative variation of radiation temperature of the bed working face surface throughout the long face length, and a point of its stabilisation is fixed, which represents a boundary of the protected zone.EFFECT: increasing safe execution of mining operations.1 dwg |
