Identification and Prediction of Thermodynamic Disasters During Deep Coal Mining

Abstract

Researching the methods to identify and predict thermodynamic disasters during deep coal mining is a very important work for the design of mine emergency systems and the decision-making of mine rescue and personnel evacuation, however, existing studies only built static models without evaluating or predicting the development trend of thermodynamic disasters, the research on dynamic modeling methods and rescue decision-making is insufficient, and they generally ignored the mechanism of mutual conversion between fire and gas explosion in deep coal mines. Thus, this paper aims to study the identification and prediction of thermodynamic disasters during deep coal mining. At first, the method for analyzing the thermal field in deep coal mining areas is introduced in detail, and the finite element thermal analysis method is adopted to study the thermodynamic disasters during deep coal mining; then, this paper establishes a thermodynamic disaster prediction model based on the improved Kernel-based Extreme Learning Machine (KELM), and introduces the improved Crow Search Algorithm (CSA) to solve the instability of prediction results caused by artificial selection of model parameters. At last, this paper uses experimental results to verify the validity of the proposed model.

Analysis and Prevention of Rock Burst Risk of Working Face under the Influence of Continuous Irregular Triangular Coal Pillar Stress Concentration Area

“…Most of China’s coal production bases are distributed in the central, northeastern, northern, and northwestern parts of the country. More than 95% of the raw coal is mined via underground mining methods. , The production mode of underground operations is very different from that of surface mining. There are many technical problems in underground mining, and many coal mine production accidents will be faced at the same time. − Rock burst is a dynamic phenomenon in which the elastic potential energy of the surrounding coal and rock mass is suddenly and violently released under certain conditions during coal mining production, resulting in severe vibration and severe damage to the coal and rock mass, making this phenomenon very destructive. − …”

“…More than 95% of the raw coal is mined via underground mining methods. 1 , 2 The production mode of underground operations is very different from that of surface mining. There are many technical problems in underground mining, and many coal mine production accidents will be faced at the same time.…”