In order to ensure the safe construction of the shaft, the construction team should do the excavation work: First, the excavator must be properly selected to carry out excavation work while ensuring that the excavator does not tip over. Second, excavator buckets to dig and rise to be familiar with the surrounding environment, to ensure that no digging, bumping, scraping cables and other facilities. Third, the excavation part should ensure that the slope angle is not more than 37° When digging under the shaft, it should be done: 1. The rock blasting rig is strictly in accordance with the blasting operation rules. The warning line must be set and detonated under the premise of ensuring the safety distance at the wellhead. Second, 10 meters before the vertical excavation, rock drilling and blasting should be done more eye-catching, less charge, and a protective layer on top to ensure the minimum impact on the surface of the building. Third, each shaft dug four meters under the temporary ladder hanging a dozen holes, and install temporary construction is a gold ladder. Fourth, must be operated by experienced hoisting mechanics (main and deputy drivers), find abnormal conditions such as rope swing, stop immediately, and continue to operate after finding out the cause. 5. Each working place in the wellbore shall be provided with independent sound and light signal systems and ventilation devices. The wellhead shall be equipped with full-time signal workers. The entire signal system shall be connected by the wellhead signal worker and the hoisting machine room and the working face of the wellbore. Sixth, the well cap segment must be drained of pumice, and once again in the investigation after class blasting. 7. When lifting with the lifting cylinder, the over-winding device shall be installed in the well cap part. The steel wire rope hanging the lifting cylinder shall be provided with a stable rope device and a sliding hook. A strong umbrella should be placed above the drum. Eighth, improve the driver to implement dual guardianship, improve the driver must be certified to work, the control room must be equipped with a TV monitoring system, and the image is clear; at the same time, the personnel must be equipped to enable one person to operate one person for supervision, and fatigue operation is strictly prohibited. Nine, picking the hook head to implement double monitoring, one person picking the hook head, after the operation check meets the requirements, another person reviews, after confirming the correct, can enter the next process. X. Hanging inspection to achieve double check, by personnel with good technical quality and strong business ability, who can perform safety inspection duties, check and review the lifting and hanging system. 11. It is strictly forbidden to use bottom open hanging cans. 12. The stable brake system is in good condition and reliable. After the installation of the stable vehicle, the reliability of the safety brake must be checked. Thirteen, the hanging plate adopts double-layer hanging plate operation. 14. The hanging plate should be moved in time according to the depth of the work. It is required to keep at 30 meters from the working surface. 15. The wellhead is provided with a strict and reliable wellhead cover and a well cover door that can be automatically opened and closed. 16. The slag discharge device should be tight and no slag is allowed. Seventeen, wind, water, electricity and other pipelines should be hanged firmly. 18. The electrical equipment at the wellhead and underground should be provided with a leakage protector at the wellhead. Nineteen, ventilation facilities must be set up in place, must ensure that the work is well under ventilated conditions. 20. Lift the personnel no more than 2 people at a time and fasten the seat belts. Twenty-one, the slag in the bucket can not be filled, should be less than 0.1 m above the edge of the barrel. Twenty-two, long objects loaded into the barrel must be firmly attached to the bucket beam. The delicate TV Mobile Stand with slim struction but loading weight up to 660 pounds, it is widely use for large size (70~120") TVs display and passed UL approval yet. Delicate Tv Mobile Stand,Advertising Machine Mobile Stand,Mobile Stand For Touch Screen Tv,Intergrated Displayer Mobile Stand Foshan Dinghan Electrical Technology Co., Ltd , https://www.dinghanelectrical.com