Real-time monitoring system and method for coal mine roof fractures during roadway tunneling process

A real-time monitoring system for coal mine roof fractures during a roadway tunneling process, comprising a roadway model building module, a roof monitoring module, a fracture analysis module, a fracture formation prediction module and an early warning processing module;

• the roadway model building module is configured for building a three-dimensional model of a roadway;
• the roof monitoring module is configured for obtaining roof fracture development data in real time;
• the fracture analysis module is configured for obtaining a development pattern of roof fractures according to the three-dimensional model of the roadway and the roof fracture development data;
• the fracture formation prediction module is configured for judging a fracture formation time according to the development pattern of the roof fractures;
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• the early warning processing module is configured for early warning according to the fracture formation time;
• the roadway model building module using a 3D modeling software, and obtains engineering data including roadway rock stratum distribution, roadway section parameters, tunneling speed, and builds the three-dimensional model of the roadway according to the engineering data;
• the roof fracture development data comprises roof stress, roof pressure and roof displacement data;
• the roof monitoring module comprises a plurality of stress sensors, pressure sensors and displacement sensors arranged at different depths of the roof;
• the fracture analysis module obtains a roof inclination angle and a connectivity of the roadway according to the three-dimensional model of the roadway, obtains a current shape of the roof according to the roof inclination angle and the connectivity, obtains the roof stress and the roof pressure within the roof fracture development data, obtains a shape change of the roof according to the roof displacement data, obtains a change trend of the roof inclination angle and the connectivity according to the roof stress condition and the shape change, and obtains the development pattern of the roof fractures according to the current shape and the change trend;
• the fracture formation prediction module obtains a formation time and a horizontal location of a single fracture according to the development pattern of the roof fractures, and generates a second-level early warning instruction according to the formation time to send to the early warning processing module;
• when there are fractures in a same horizontal location, the fracture formation prediction module judges a formation time of a through fracture according to a formation time of the fractures in the same location, and generates a first-level early warning instruction according to the formation time of the through fracture to send to the early warning processing module.