How to draw these two lines?

Question

How to draw these two lines?

\documentclass[twocolumn]{ltxdoc}
\usepackage{amsmath}
\usepackage{lipsum}
\begin{document}
\begin{equation}
    Trans_{z_{n-1}}(d_n) = \begin{bmatrix}
1 & 0 & 0 & 0 \\

0 & 1 & 0 & 0\
0 & 0 & 1 & d_{n}\
0 & 0 & 0 & 1
\end{bmatrix}


\end{equation}
\end{document}

My current version is like this:

Answer 1

You could use the tabularray package like this:

\documentclass{article}
\usepackage{tabularray}
\UseTblrLibrary{amsmath}
\begin{document}
\begin{equation}
    \text{Trans}{z{n-1}}(d_n) = 
    \begin{+bmatrix}[
      hline{Y} = {solid},
      vline{Y} = {solid}
    ]
      1 & 0 & 0 & 0 \
      0 & 1 & 0 & 0\
      0 & 0 & 1 & d_{n}\
      0 & 0 & 0 & 1
    \end{+bmatrix}
\end{equation}
\end{document}

Answer 2

With nicematrix:

\documentclass{article}
\usepackage{nicematrix}
\begin{document}
[ 
\mathrm{Trans}{z{n-1}}(d_n) = 
\begin{bNiceArray}{ccc|c}[margin]
1 & 0 & 0 & 0 \
0 & 1 & 0 & 0\
0 & 0 & 1 & d_{n}\
\hline
0 & 0 & 0 & 1 \
\end{bNiceArray}
]
\end{document}

Answer 3

\documentclass[twocolumn]{ltxdoc}
\usepackage{amsmath}
\usepackage{lipsum}

\begin{document}
\begin{equation}
    Trans_{z_{n-1}}(d_n) = \left[\begin{array}{ccc@{\enskip\vrule\enskip}c}
    1 & 0 & 0 & 0 \\
0 & 1 & 0 & 0\\
0 & 0 & 1 & d_{n}\\
\hline
0 & 0 & 0 & 1
    \end{array}\right]
\end{equation}

\end{document}