According to the provincial and municipal Environmental Protection Bureau's approval of the environmental impact assessment report for the Sanyi Coal Mine Construction Project in Zhaojialiang Coal Mine of Shenfu Economic Development Zone, combined with the preliminary design specification for 3-1 coal seam mining in Zhaojialiang Coal Mine, the boundary noise implementation of the mine construction site is GB12348- 90 Class III area standard for noise standard of industrial enterprises at the boundary of the factory, and GBJ87-85 "Code for design of noise control in industrial enterprises" for noise in production workshops.
1. Mine noise source 1. Main fan for mine ventilator house 2. Main belt nose part of ground production system, crusher, vibrating screen 3, drum induced draft fan for boiler room 4, and ground pressure fan room for wind pressure equipment 5. Wellhead heater room heater equipment 6, production workshop hammer and cutting machine 7, wood warehouse yard saws 8, mine downhole scraper conveyor (not on the ground of environmental protection)
Second, anti-noise, noise reduction and vibration reduction safety measures 1, the ventilation fan room of the mine ventilation room to install soundproof rooms, so that the noise reduced to environmental protection standards. In addition, regular dust cleaning, regular lubrication of parts and maintenance, reduce wear and tear noise.
2. The ground production system adopts totally-enclosed external anti-noise. The interior adopts interior wall sound-absorbing material to decorate the surface, the door of the cell adopts sound-proof type, and the door joint is sealed by a rubber strip. Sieve plates and side plates are lined with mineral waste tape to effectively counter high-frequency vibration of the side plates, reduce radiation noise, and strengthen dust cleaning and lubrication of various lubrication components.
3. The crusher of the raw coal sifting system is mainly caused by the impact of objects. The treatment measures are to install acoustic enclosures to the crusher to reduce the radiation of its noise.
4, the boiler room fan installed silencer. Boiler room exhaust valve noise generated by the installation of muffler control.
5, pressure fan room equipment installation muffler cover.
6. The fan heater equipment adopts a muffler cover and closed noise reduction.
7. Single noise isolation equipment in the production workshop.
8. Wood block saw adopts wet noise reduction.
9. In addition to water and dust removal in places where the screening powder is crushed, comprehensive comprehensive treatment of dust is performed in combination with equipment and conveying equipment to reduce noise. Reduce dust concentration in the workshop to ensure the health of workers.
10. For the nose of each conveying device, set a sprinkler dust collector and a sound-absorbing sound-collecting dust cover. Set an FM-type feeding-bag type dust collector above the integrated cover. The dust-containing gas is discharged after being purified by a bag filter. Coal dust still falls on the conveyor belt, which not only plays the role of noise reduction but also dust protection.
11. In the noise-generating equipment of the independent unit, the sound-absorbing guide plate is shielded around its periphery, and in addition to absorbing part of the noise, the leaking sound is directed above the maintenance device and is absorbed by the space absorbing body placed above the enclosing device. At the same time, the dust generated by the device is also enclosed in a relatively small area and dust is removed.
12. When installing the equipment, pay attention to the connection between the equipment and equipment, between the equipment and the walls of the plant, between the equipment and the floor, no sound connection between the sound insulation cover and the equipment, flexible rubber joints for the import and export of various types of pumps, Pump body for vibration treatment.
13. Under the mine shaft, strengthen the management of the scraper conveyor, timely inject the lubricating oil, sweep the floating coal and floating dust every day, and dampen the shock absorbers such as chutes and chutes to reduce the noise of various chutes.
14, in the workplace can not take sound insulation, vibration, damping and other noise reduction measures, according to need to build soundproof duty room, while installing sound absorption structure inside the building to eliminate the reverberation sound. Workers working in the workplace should strengthen personal protection and wear protective equipment such as earplugs, earmuffs, and protective helmets to reduce the direct impact of the noise environment on workers.
Through the above measures, the mine's noise at the plant boundary complies with relevant environmental protection standards and gives workers a better working environment.
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