Continuous prediction method of gas emission dynamic characteristic outburst of tunneling surface

Abstract

The invention relates to the technical field of coal mine safety, in particular to a continuous prediction method of gas emission dynamic characteristic outburst of a tunneling surface, which utilizes the development state and the development trend of three factors of outburst comprehensive hypothesis of the tunneling surface of gas emission dynamic characteristic reaction of the tunneling surface and realizes the non-contact type continuous prediction technology of coal of the tunneling surface and gas outburst; and the method comprises the following steps: acquiring real-time gas emission monitoring data of an underground gas sensor from a coal mine gas monitoring system; extracting dynamic characteristics of gas emission of the tunneling surface, including average value of frequency ofthe monitoring data of the gas emission, the maximum value of the frequency per minute of the monitoring data of the gas emission and the movement minimum value of the frequency per t minutes of the gas emission; and acquiring the shape design characteristic parameters of a lane, the original desorbable gas content of a coal layer, wind rate and frequency time, sequentially acquiring characteristic index of the gas emission rate of the tunneling surface, gas desorption index and gas dividing source characteristic index, and carrying out real-time prediction and forecast of outburst risk of a working surface according to the states and the trends of the three characteristic indexes.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, and specifically designs a method for continuously predicting the dynamic characteristics of gas gushing out from a driving face. Background technique [0002] Anomalies such as increased gas outburst or suddenly large or small gas before outburst have always been one of the main omens before coal and gas outburst. Accurately grasping the anomalous information of gas outburst on the excavation face is one of the core issues in predicting the outburst risk of the excavation face one. [0003] In local outburst prevention measures, our country's outburst prevention technology has established a "four-in-one" local comprehensive outburst prevention measure that integrates outstanding risk prediction, outstanding prevention and control measures, effect inspection of outburst prevention measures, and safety protection measures. This reduces the occurrence of outstanding accidents to a certain...

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Problems solved by technology

In addition, the gas emission indicators (including V 30 , B and K v etc.) only start with part of the external manifestations of the pre-emphasis of gas gushing, analyze and establish the dynamic characteristic indicators of gas gushing, and do not start from the coupling relationship between the three factors of the comprehensive hypothesis and the main controlling factors of gas gushing, and analyze from the root The reliability of technology for predicting coal and gas outburst based on the dynamic characteristics of gas gushing is still unable to achieve the goal of accurately predicting coal and gas outburst

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