Correlation analysis of mining stress and working face outburst index

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0015

Abstract

Abstract:

In order to accurately predict the risk of coal and gas outbursts in the mining face, the east 1100 working face of Weijiadi coal mine in Gansu Province was taken as the research object, and the influence factors of mining stress on the outburst index were studied. By using the method of mathematical statistics and combining with the situation of the mine field, the quantitative relationship between the gas pressure of the coal seam and the desorption index of the drilling cuttings was studied, and the relationship between the mining stress and the gas outburst index was deduced. Through the observation of the mine pressure of the mining face, the gas outburst index of the coal body in a certain range could be quantitatively analyzed, and the distribution of the mining stress of the coal body could be judged by measuring the gas outburst index. The results show that mining stress has a certain influence on the gas outburst index. The mining stress and the desorption index of the drilling cuttings can be derived from each other. The fitting function between the two is quadratic. With the increase in mining stress, the desorption index of drilling cuttings and the maximum amount of drilling cuttings increase first, gradually stabilize, and then increase rapidly, indicating a positive correlation.

Key words: mining stress, working face, outburst index, gas, amount of drilling cuttings, desorption index of drilling cuttings

CLC Number:

X936

XIE Yadong, WU Qixuan, LI Zuoquan, ZHANG Jianjiang, QUAN Jiye. Correlation analysis of mining stress and working face outburst index[J]. China Safety Science Journal, 2023, 33(S2): 96-99.

Figures/Tables 4

References 12

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