First, step up pumping and drainage, and monitor and reinforce the tunnel roof in sections according to the actual situation to prevent landslides.

The second is to further strengthen tunnel ventilation, reduce the concentration of harmful gases, and ensure that the gas indicators in the tunnel meet the construction safety requirements.

Third, according to the situation that the probe enters the hole with the water, we should make further technical preparations and refine the dredging work in the hole.

Fourth, do a good job in health and epidemic prevention, risk prevention and control, and strengthen water quality monitoring and sanitation and disinfection.

The fifth is to do a good job in comforting the families of trapped people.

So far, no trapped people have been searched.

On July 18, Zhuhai held a press conference to inform the rescue of the "715" flooding accident in Shijingshan Tunnel. By 9: 00 am on July 18, the rescue working face had advanced 598.5 meters into the tunnel, 56 1.5 meters away from the trapped point, and the overall water level in the tunnel dropped 1 1.3 meters. At present, a professional diving team has been dispatched, constantly trying to dive for search and rescue, but still no trapped people have been found.

Zhang Yisheng, deputy mayor of Zhuhai, said that after the "715" flooding accident of Shijingshan Tunnel, under the guidance of the national joint working group and the provincial and municipal on-site rescue headquarters, the rescue team rescued around the clock and made every effort to promote the pumping and drainage of tunnel water, the backfilling and pouring of reservoir leakage points, and the control of hydrogeological disasters.

According to reports, in view of the new situation encountered in the rescue work, a number of measures have been taken, including optimizing the tunnel drainage scheme, implementing backfill grouting at the top of the tunnel, closely monitoring the harmful gases in the tunnel, the surface backfill area and the tunnel, and fully carrying out underwater search and rescue.