94 results about "Mine water inrush" patented technology

The invention discloses an underground flood alarm system based on an image and water inflow monitoring device. Cameras are installed on driving working faces, coal faces, or other working faces of an underground coal mine to which water inrush accidents may occur, and the cameras are connected with the image and water inflow monitoring device and a video server through a video branching unit. The image and water inflow monitoring device acquires water inflow data, and monitors onsite videos and water inflow data, and sends flood alarm data to a monitoring terminal according to a monitoring result. Production management persons can check onsite real-time and historical videos through the monitoring terminal, and carry out corresponding emergency processing. The alarm system gives full consideration on characteristics of floods in a coal face of an underground coal mine, and the system is simple to apply. Corresponding measures are automatically taken in time, and the system accurately gives out an alarm on mine water inrush in first time, and buys valuable disaster relief and escape time for underground personnel who are not on the site of the water inrush in other regions.

A multi-level coal mine water inrush prediction method based on an SaE-ELM (self-adaptive evolutionary extreme learning machine) includes the steps of 1, researching a coal mine water inrush mechanism and selecting main controlling factors causing coal mine water inrush; 2, searching for a great deal of coal floor water inrush historical data as sample data, with each set of data including main controlling factors and maximum water inrush; 3, dividing the sample data into a training set and a test set, applied to training and testing of a model, respectively; 4, training the sample data with the SaE-ELM to establish a prediction model; 5, testing the prediction model with the data of the test set, comparing obtained prediction results with those obtained by other algorithms; if the prediction precision is high and the speed is high, using the prediction model for predicting whether a coal mine suffers water inrush or not and predicting the degree of water inrush.

The invention relates to a water inrush source discrimination method, belongs to the technical field of coal mines, and particularly relates to a coal mine water inrush source discrimination method. The method comprises: combining a combination weight and improved set pair analysis; establishing a combined weight set pair analysis model; using the objective weight of entropy weight calculation and the subjective linear combination of improved analytic hierarchy process calculation as the combination weight. The problems that recognition factor weight calculation is inaccurate and calculation is difficult are solved. The problem that the membership degree of the water inrush source is difficult to determine is solved through the set pair model, and the recognition accuracy of the water inrush source is improved through the water inrush source recognition method.

The invention discloses a method for determining the installation position of a mine disaster blocking emergency refuge device. The installation position of the mine disaster blocking emergency refuge device is obtained through calculation according to the relation between the distance between a gas blasting source and a protected object and the air shock wave overpressure value, and the rationality of the installation position of the mine disaster blocking emergency refuge device is verified through gas blasting flame propagation time, personnel evacuating time and the starting time of the mine disaster blocking emergency refuge device; aiming at a mine flooding accident caused by mine water inrush, the installation position of the mine disaster blocking emergency refuge device for preventing mine water inrush is determined through water level upward rising time, water flow downward pervasion time, the personnel evacuating time and the starting time of the mine disaster blocking emergency refuge device; the reference for determining the installation position of the mine disaster blocking emergency refuge device is characterized in that the personnel evacuating time Tr is longer than the starting time Tz of a photoelectric induction or impact sensor and the mine disaster blocking emergency refuge device, and the starting time Tz of the photoelectric induction or impact sensor and the mine disaster blocking emergency refuge device is not shorter than the maximum value of the flame propagation time TB and the water level upward rising time Ts in the gas blasting process.