由于 / 支护 / 不力 / 隧道 / 内 / 出现 / 了 / 冒顶 / 所幸 / 无人 / 受伤

由于支护不力，隧道内出现了冒顶，所幸无人受伤。

Because the support was inadequate, a roof collapse occurred in the tunnel, but fortunately no one was injured.