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Abstract Multifield coupling test system for dynamic disaster in coal mine was independently developed；the system mainly consists of bearing skeleton frame，specimen box，rapid response door for sealing，servo loading system，data acquisition system and other auxiliary equipments. The test system could be used for simulation of coal and gas outburst disaster and dynamic state of stress during coal mining；its main advantages are reflected in：(1) Large size of specimen box makes simulation closer to the reality，and it is designed in high sealing pressure (up to 6.0 MPa). (2) It can provide complex loading called three-dimensional and multilevel loading，which is closer to the state of stress distribution in the underground mining. (3) Up to 64 sensors are used to collect coal/rock parameters such as temperature，stress and gas pressure of the different spatial positions，in order to research the temporal and spatial evolution of the coal/rock parameters in the process of the coal mine dynamic disaster. A successful simulation test of coal and gas outburst by using the test system was made；the result indicates that the temperature and the gas pressure in the coal seam both show diversity in temporal and spatial variation，specific performance in the rapid pressure drop and the great temperature reduction in the obvious dynamic effect area of the coal seam. So the evolution of physical field，in a manner，indicates the space-time development status of the coal seam dynamic effect. The result means much to further understand the coal and gas outburst mechanism.
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Received: 24 October 2012
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2013, Vol. 32 
