# Research on Coal and Gas Outburst Risk Warning Based on Multiple Algorithm Fusion
## 4 Experimental Simulation  
### Data Source  
The influential factors of gas outburst can include the static data of the mine and the dynamic data of real-time monitoring. The static parameters of the outburst mine partially reveal the potential patterns of gas outbursts. To study the laws of gas outbursts, this paper collected relevant data on gas outbursts from 26 mines in the Southwest China, North China, and Central China regions, as well as numerical simulation indicators. The related data indicators included mining depth, coal solidification coefficient, ash content, volatile matter, initial gas emission velocity, gas adsorption constants a and b, \(\Delta\)h\({}_{2}\), absolute gas outburst (m\({}^{3}\)/min), relative gas outburst (m\({}^{3}\)/t), K\({}_{1}\), Smax (kg/m), q (L/min), and ejection amount. At the same time, this paper used numerical simulation experiments to simulate the dynamic slope of gas pressure, geostress, goat thickness, fault height, and fitting curve of pre-gas outburst data with similar ejection amounts. Part of the raw data is shown in Table 1.  
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Mining Depth**} & \multirow{2}{*}{
\begin{tabular}{c} **Coefficient** \\ **of Coal** \\ **Firmness** \\ \end{tabular} } & \multirow{2}{*}{**Ash Content**} & \multirow{2}{*}{**Volatile Matter**} & \multirow{2}{*}{**Seam**} & \multirow{2}{*}{**Initial**} & **Gas** & **Gas** & **Gas** & **Absolute** & **Relative** \\  & & & & & & & **Gas Release** & **Constant a** & **Constant b** & **Emission** & **Emission** \\ \hline
800 & 0.34 & 0.18 & 0.12 & 1.25 & 14.84 & 38.59 & 0.787 & 170 & 32.01 & 13.94 \\
452.7 & 0.31 & 0.15 & 0.1 & 5.69 & 12.16 & 37.32 & 0.723 & 140 & 6.58 & 4.21 \\
850 & 0.39 & 0.23 & 0.12 & 4 & 18.6 & 18.13 & 2.3445 & 180 & 34.8 & 15.09 \\
600 & 0.49 & 0.12 & 0.08 & 1.7 & 28 & 30.303 & 1.3346 & 175 & 32.04 & 13.95 \\
500 & 0.24 & 0.18 & 0.12 & 1.25 & 31 & 33.4832 & 1.6166 & 170 & 32.01 & 13.94 \\
515 & 0.17 & 0.17 & 0.11 & 4.6 & 38 & 31.08 & 1.13 & 172 & 16.01 & 10.88 \\
500 & 0.23 & 0.17 & 0.11 & 3.2 & 26.3 & 26.3459 & 1.2572 & 160 & 9.78 & 10.45 \\ \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) \\ \hline \multirow{4}{*}{K\({}_{1}\)} & \multirow{4}{*}{Smax} & \multirow{4}{*}{q} & \multirow{4}{*}{\begin{tabular}{c} Initial \\ gas \\ pres- \\ \end{tabular} } & \multirow{4}{*}{Numerical simulation of gas pressure} & \multirow{4}{*}{\begin{tabular}{c} Numerical simulation of gas \\ pressure \\ \end{tabular} } & \multirow{4}{*}{\begin{tabular}{c} Numerical simulation \\ of of ground \\ stress \\ \end{tabular} } & \multirow{4}{*}{\
\begin{tabular}{c} Numerical \\ simulation of stone \\ data \\ \end{tabular} } & \multirow{4}{*}{
\begin{tabular}{c} Dynamic \\ simulation of slope \\ fault height \\ \end{tabular} } \\ \cline{1-1}  & & & & & & & & & \\ \hline
0.36 & 3.5 & 57 & 0.75 & 28 & 4 & 5 & 15 & 0.75 \\
0.32 & 3.4 & 26.05 & 0.75 & 35 & 4 & 1 & 2 & 0.75 \\
0.34 & 3.7 & 34 & 2.4 & 16 & 0.2 & 1 & 5 & 2.4 \\
0.41 & 2.1 & 38 & 0.75 & 10 & 3 & 5 & 7.5 & 0.75 \\
0.413 & 2.2 & 42 & 2.4 & 35 & 4 & 1 & 1.1 & 2.4 \\
0.36 & 2.2 & 83 & 0.75 & 10 & 0.2 & 5 & 20 & 0.75 \\
0.47 & 2 & 36 & 0.75 & 22 & 1 & 1 & 1.1 & 1.5 & 0.75 \\ \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) & \(\cdots\) \\ \hline \hline \end{tabular}
\end{table}
Table 1: Part of the original data.  
Figure 3: XGBoost–GR-stacking flowchart of gas outburst warning model.