Prevention of Metallurgical Mine Accidents

One, collapsed roof

Landslides are accidents that often occur in metallurgical mines.

Preventive measures

1 When the multi-layered ore body is stratified, it is necessary to wait until the rock at the top of the upper layer collapses and stabilizes before recovering the lower seam.
2 When the upper and middle two adjacent middle sections are mined at the same time, the upper and middle sections of the mining workface should be more than 20m long than the lower middle section of the working face.
3 If the top picking work is found to be unstable, the support must be taken. The support damaged by the blasting or ground pressure manifestation should be promptly repaired, and the safety should be confirmed.
4 The top plate and two groups of pumice stones must be processed before mining, and the safety must be checked before making a stop. When the top of the operation is found to be a sign of top-down, it is necessary to stop the operation and carry out the treatment. In particular, when there is a danger sign of heavy roof fall, the operator should be notified immediately to leave the site without authorization.
5 If there is a goaf at the edge of the stope, the edge of the goaf must be used first. In case of a stopcock with broken roof and serious ground pressure, in addition to necessary support, the mining progress should be accelerated to shorten the stope. Exposure time.

Second, floor collapse

Under normal circumstances, the collapse of stope floor is rare, but in recent years there have been frequent mining and mining sites around the state-owned mines, which have been dug into the “upstairs and downstairs” status. In the normal production order, it is inevitable that there is a collapse of the bottom of the stope. This poses a serious threat to the life safety of stope workers.

Preventive measures

1 The designated functional department constantly monitors the surrounding miners' mining sites. Timely understanding of the dynamics of miners’ mining sites, the responsible supervisory department responsible for monitoring shall report to the head of the mine manager on a monthly or quarterly basis the analysis and report of the impact of mined mining sites on the safety of the mine, and take timely preventive measures against the hidden accidents raised in the report.
2 The downhole production unit has discovered that the mining site of the Minmin mining site is indiscriminately digging. It must promptly report and write a written report to the mine’s relevant leaders and authorities. It must immediately withdraw personnel in order to prevent major accidents from endangering the safety of the underground stope. .
(3) For mining miners that are often exploited beyond boundaries, the mining functional department must take mandatory measures to stop production.

Third, blast injury

Stope blasting operation is an important process in production and an important part of safety management. In this work, the “Blasting Safety Regulations” must be strictly followed, and violations of the regulations can easily lead to blasting injuries.

Preventive measures

1 Strictly abide by the "Blasting Safety Regulations." All personnel engaged in blasting work must undergo special training, pass the examination, and hold a blasting operation certificate issued by the local public security department before they can engage in blasting operations.
2 Ignition ignition is applied when the fuse is detonated. If a single person ignites, the number of consecutive shots by one person must not exceed five (groups). The length of the fuse should not be shorter than 1.2m.
3 Blasting operations are prohibited from single operation. Before the blasting, it must notify the neighboring approach and stope personnel to withdraw to a safe place. The gunners are constantly making security calls when they make unauthorized landings.
In the second blasting, all entrances to the blasting site must be stationed with guards.
5 After each blast, after 15 minutes from the last shot, it must be sent to the work surface after 15 minutes to confirm that no exceptions will be given to the team leader before permitting personnel to enter the work surface.

Fourth, gun smoke poisoning

After blasting at the stope, the large amount of gun smoke produced contains poisonous and harmful gases. If the local ventilation system of the underground stope is incomplete, gun smoke cannot be discharged in a short time. Workers are eager to work when gun smoke is not discharged, and are prone to gunshot poisoning.

Preventive measures

1 Stope must improve the local ventilation system. For poorly ventilated stope, fans should be installed for ventilation.
2 It is necessary to regularly maintain stope ventilation equipment. When the ventilation equipment fails, it must be repaired in time to ensure the normal operation of the equipment.
3 After each explosion, it is necessary to start the ventilation for ventilation and to organize production after the smoke is removed.

5. Liu Jing falling people

1 The safety anti-dropping measures of the 1 wells such as lighting, grid screens, manhole covers or railings, etc. must be complete and reliable, and should be checked frequently. In use, it is found that the fall prevention device should be repaired in time.
2 Safety warning signs, insurance hooks and safety belts shall be set at the mines where the wells are turned, ensuring the safety of operators.
3 Cover wells that are not in use for a while, in order to prevent personnel from falling.