Chinanews.com, Alxa, February 24th (Reporter Li Aiping) Inner Mongolia Alxa Zuoqi Xinjing Coal Industry Co., Ltd. Open-pit Coal Mine Large-scale Collapse Accident Rescue Headquarters held a press conference on the 24th. Inner Mongolia Autonomous Region Emergency Response Headquarters Rescue Team Expert Group Expert Zhang Yong reported at the meeting that judging from the current situation, the current rescue work mainly has the following difficulties:
First, the amount of landslides at the accident site was huge, and it took a long time to clear and transport the slide. Second, the stability of the slide was poor, and there was still a risk of collapse at the trailing edge of the slide. Rolling stones were found falling during the on-site rescue, and secondary disasters were prone to occur. ; The third is that the on-site operation space is narrow and the equipment layout is limited, so it is impossible to invest a large amount of equipment for large-scale operations. At the same time, due to the large number of sliding bodies, the loading efficiency is affected; the fourth is that the sliding body has a large drop, and it is difficult to clean and rescue from the bottom. , the equipment can only be put into operation after the platform is formed from the bottom to the top.
In response to this situation, Zhang Yong said that the rescue method of "forming a north-south working line and advancing to the middle of the east and west sides respectively" has been determined.
One is to connect the rescue road on the top of the slide body, and build a temporary road on the south side of the middle of the backfill slide body to connect with the existing road in the south; the other is to open up the eastern transportation channel (the road width is not less than 15 meters, the slope is not When the length of the road is greater than 250 meters, a gentle ramp with a slope of no more than 3% is set), so that the excavator can directly push down the rock and soil on the upper part of the slide body; the third is to gradually form a working platform to realize multi-step synchronous operation (the width of the working flat plate is different less than 30 meters, the height of the steps is not more than 10 meters, and the slope angle of the steps is not more than 45°); the fourth is to increase the investment in rescue equipment; the fifth is to strengthen on-site management, do a good job of early warning, and use radar and other monitoring methods to strengthen the northern border Slope deformation monitoring to prevent large rocks from rolling down and causing damage to equipment and personnel.