China News Service, Qinghai Gangcha, August 16 (Zhao Linsong, Li Jun, Qi Zengbei) "As long as there is a glimmer of hope, we will strive for it with a hundredfold, so that our miners brothers can safely rise to the shaft." On August 16, Du Bingjian, a member of the expert team of the National Emergency Rescue Command Center and an expert of the rescue center of the China Coal Geology Bureau, told a reporter from Chinanews.com at the rescue site of the Qaidar Coal Mine of Qinghai Xihai Coal Development Co., Ltd.
At 18:00 on the 16th, the reporter visited the rescue site of the roof fall accident on the spot. At this time, it has been 54 hours since 19 miners were trapped.
The picture shows the rescue scene.
Photo by Zhao Linsong
At 1.2 kilometers away from the entrance of the accident mine, an open-pit mine that was as large as 6 football fields was 90 meters vertically from the ground.
Viewed from a height, the pit is covered with black coal. Rescue workers circled a white area with tarpaulin on the surface of the trapped person. Large-scale rescue equipment is in operation. Rescue personnel install and deploy drilling equipment.
The reporter walked into the mining pit, and his feet were slippery. In some places, he would sink deeply when he stepped on it. You could see that the rescuers' feet were also covered with black coal.
On the west side of the mining pit, a drilling mast has been erected, and three rammers beside the mast are ramming the ground muck.
The picture shows the rescue equipment at the construction site is digging drainage canals.
Photo by Li Jun
Li Yonghong, chief engineer of Qinghai Coal Geology Bureau, told reporters that they need to drill 22 holes in the white area. There are currently 11 drilling rigs and nearly 100 construction workers are on the construction site. After the site is leveled, they will install equipment one after another until the circuit is connected. The first hole will be drilled.
The fallout from the roof fall accident in the Qaidar Coal Mine was mud.
Before the incident, the mine was an open pit with a depth of about 160 meters. It had been backfilled to 80 meters at the time of the incident.
The backfill part has no rock strata and is dominated by sandy soil. The geological conditions of the mine are complex and extremely unstable.
"Now we need to use a drilling rig to drill down on this platform to block all the mud and quicksand below, so as to rescue the miners from below." Du Bing, a member of the expert team of the National Emergency Rescue Command Center and an expert from the Rescue Center of the China Coal Geology Bureau According to Jian, after 22 holes are opened, cement slurry will be used to seal them. After the cement column is solidified and solidified, to ensure that the slurry no longer flows and does not collapse, rescuers can enter the mine to dredge and rescue people.
The picture shows the rescue scene.
Photo by Li Jun
Because of the rainy season, there is continuous water seepage around the pit.
In order to prevent rainwater from flowing into the accident area, it will bring difficulties to rescue.
Two excavators are digging drainage channels on the west side of the hillside, and black drainage pipes have been laid in the trenches that have been dug.
"Our main responsibility is to ensure surface water and drainage. After today's construction, the five drainage facilities are basically in outline, and the construction tasks are expected to be completed by 22:00 tonight." said Lu Qiang, chief engineer of the Qinghai Provincial Water Resources Department.
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