| In coal mine production in the fully mechanized working face, of working face and continuous monitoring of roof, not only can get accurate data of roof abscission layer, can also predict various roof presumption under the condition of the roof periodic pressure regularity, early detection roof signs of stability and security reasons, such as strengthening support and other measures to avoid roof caving accidents. This study reflects underground coal mine of various parameters roof stability state changes, real-time online continuous monitoring, and according to the roof was safe state continuous monitoring information, analysis evaluation mine production safety of roof stability of state and disaster sign, in time understanding mine roof state, and in the roof before disaster accident happened a security warning, in order to make mine workers to take effective measures to prevent technology, avoid or reduce the mine disaster accident happened roof.This research is combined with the national science and technology support projects task "mine safety state continuous monitoring and roof disaster warning system development2007BAK29B02" was put forward based on the roof of the instability of catastrophe theory and fuzzy mathematics comprehensive evaluation theory model, to determine the roof disaster warning critical threshold parameters, already developed the mine pressure sensor, anchor (cable) load sensors, mine displacement sensor, mine borehole stress sensors, the negative pressure sensor, and the sound of geological radar sensors and sensor etc seven aspects sensor, part of the sensor has set up a file in the sihe coal mine no.2shaft installation use; And MeiKeYuan drafting of fushun of mining industry standard displacement sensor gives suggestion.System data transmission using CAN bus transmission, the partial use wireless transmission, Ethernet communication interface, and developed a strong compatibility of mine network switch as a main transmission system key equipment. Main transmission system up to20km distance, the transmission distance RACES to5km; Wireless data transmission distance reached800m; Emission limits power10mw; Data transmission delay is not more than200milliseconds;State of disaster warning of intelligent decision making software to roof displacement sensor, anchor (cable) load sensor, and the sound of the state information such as sensors monitor real-time analysis, judgement of surrounding state, on the single factor of disaster warning; State of the stope disaster warning intelligent decision support load software to sensors, the negative pressure sensor, displacement sensor, geological radar sensors monitoring state information for real-time analysis, judgement stope roof of the state, the stope single factor disaster warning; Comprehensive monitoring of all factors state information, based on the roof of the instability of catastrophe theory and fuzzy mathematics comprehensive evaluation theory model and determining roof disaster warning critical threshold parameters, according to many factors disaster warning analysis software, and realize the stope and state of many factors disasters comprehensive warning, and realize intelligent decisions.In the comprehensive consideration of the information collection, pretreatment, transmission process and ground information analysis and software running on the basis of factors, roof safety condition monitoring and disaster warning decision system response time lag is not more than10s, the system can handle480points, sensor information capacity eventually distorting rate control under1%. The research and development of stope roof disaster warning system has made by coal group in sihe coal mine no.2shaft, ZhaoZhuang ore and ZhaoZhuang number two Wells of field test, established the demonstration base; System software can be accurate to roof state disaster warning. |
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