Online intelligent monitoring and early-warning system of ordovician limestone water burst of coal mine bottom slab

Abstract

The invention provides an online intelligent monitoring and early-warning system of ordovician limestone water burst of a coal mine bottom slab. A plurality of multi-parameter sensing subsystems are arranged on the coal mine bottom slab containing ordovician limestone, sensing data obtained through online monitoring are transmitted to a database server through a wireless / wire communication subsystem, and then intelligent early-warning is conducted on the water burst of the coal mine bottom slab through an intelligent water burst early-warning subsystem. By the adoption of the one-hole multi-sense mode, wireless transmission and intelligent early-warning, accurate, convenient, fast and efficient online mine water burst monitoring and early-warning are achieved.

Description

technical field [0001] The invention relates to a coal mine underground water prevention and control monitoring and early warning system, in particular to a multi-sensing on-line monitoring and intelligent early warning system for austrian limestone water inrush on the floor of the coal mine underground. Background technique [0002] With the continuous increase of coal mining depth and intensity, most coal mines have entered into deep mining or lower group coal mining, especially in North China type coal fields, affected by coal-measure limestone and basement limestone karst water, the bottom of the coal seam is extremely confined by water. It is easy to break into the mine through the concealed water guide structure, causing huge economic losses and casualties. The water inrush from the coal mine floor has become one of the important hidden dangers affecting the safety of production. It is of great significance to ensure safe belt pressure mining. [0003] Although coal m...

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Problems solved by technology

[0004] Over the years, scholars at home and abroad have done a lot of research on the monitoring and early warning methods of water inrush in coal mine floors, mainly starting from the three necessary conditions for water inrush: water source, water pressure and water guide channel, to carry out necessary detection and analysis, The geophysical prospecting method is mainly used. The detection equipment includes transient electromagnetic instrument, direct current detector, tunnel radio wave perspective instrument and three-dimensional seismic detector, etc., to check the water-richness of the aquifer and the geological structure that is easy to form water-conducting channels, such as cracks. Development zone and fault detection, but the equipment of these geophysical prospecting methods is heavy and expensive, and the single detection method is susceptible to noise interference and the accuracy is not high, making it difficult to be applied to the real-time online monitoring of water inrush precursor information

Some scholars evaluate the possibility of water inrush based on water inrush mechanism and pan-decision theory, including water inrush coefficient method, "lower three zones" theory, "key layer" theory, vulnerability index method and artificial neural network In these evaluation methods, the historical hydrogeological data or mining condition data of the mining area are mostly used, and there is a lack of effective use of some real-time monitoring of water inrush precursor information.

[0005] In view of the dynamic and real-time requirements of coal mine floor water inrush monitoring and early warning, the research on real-time monitoring of water inrush precursor information and analysis and early warning by laying sensors on the coal seam floor is gradually increasing, such as Jin Dewu, Liu Yingfeng and others in "Coal Science and Technology" The "Development and Application of Coal Seam Floor Water Inrush Monitoring and Early Warning System" was published on the Internet, and a set of coal seam floor water inrush monitoring and early warning system based on fiber bragg grating communication and sensing technology was developed, which consists of data acquisition system and water inrush monitoring data. Composed of an integrated analysis system, fiber gratings are used to monitor the strain, water temperature, and water pressure of the bottom plate of the working face in real time, and the data are transmitted to the ground monitoring station for display and analysis, which provides assistance for early warning of water inrush, but the system is mainly for cracks The monitoring of water inrush caused by expansion and fault activation does not fully consider other water inrush conditions of the austrian limestone on the floor. Optical fiber cable communication is used for data transmission, which is not conducive to the flexible deployment of sensors in the mining face. The monitoring data is only for real-time display and simple manual operation. Analysis, the accuracy and efficiency of water inrush warning is not high

[0006] Tong Ziyuan, Tong Minming and others invented the "Real-time Monitoring Method and System for Mine Water Inrush", which disclosed a real-time monitoring method and system for mine water inrush. monitor, water inflow monitor, water quality monitor, multi-channel data set controller, gateway, industrial Ethernet and monitoring host, the monitoring host analyzes the received signal, so as to monitor the water inrush hazard source and precursor information, and analyze the mine emergency However, this invention is for comprehensive monitoring of mine water inrush, and the layout method and location of sensor monitors are not clearly given, especially for water inrush from austrian limestone on the floor which is more harmful, and the monitoring and early warning is not targeted. Not very accurate

[0007] Wu Qiang, Liu Chunsheng and others invented the "Mine Roof and Floor Water Inrush Monitoring and Forecasting System and Method", which disclosed a mine roof and floor water inrush monitoring and forecasting system and method. And multiple detection terminals including a controller and memory, three-dimensional vibration sensors, and electrodes, through real-time monitoring of the vibration and apparent resistivity changes of the roof and floor of the roadway, and comparing with the set threshold, the monitoring and forecasting of mine roof and floor water inrush is realized. However, this invention only uses microseisms to monitor the water guide channel, and uses apparent resistivity to monitor the water inrush source, and does not monitor the characteristic parameters of the aquifer, such as changes in water temperature and water pressure, resulting in relatively single monitoring parameters and poor detection accuracy. decline

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