mリーグ無料で見れなくなった

Contact Us GLOBAL Search this site 日本語 中文 Corporate Overview Products and Services Research and Development Sustainability News Corporate Overview Message from the Management Philosophy Quick Guide to JX Metals Business Segments Corporate Data Organization and Executive Officers Corporate History Operating Sites and Group Companies Long-Term Vision and Medium-Term Management Plan Purchasing Information Products and Services Search by Category Copper Alloys and Special Steel Products Copper Foil Sputtering Targets Compound Semiconductors and Crystal Materials Metal and Compound Powders Special Ceramic Powders High Purity Metals Surface Treatment Agents Upinorg (high-purity copper sulfate) Electroless UBM Plating Service MoSi2 Heater Shielding Materials Nonferrous Metals and Chemical Products Products Under Development Search by Keyword Semiconductors and Sensors Circuit Boards Assembly Displays Batteries and Energy Additive Manufacturing Connectors Magnetic Devices Electromagnetic Shielding Communications Optics Camera Modules Piezoelectricity Thermal Control Research and Development Our Core Technologies Contributing to Societal Growth and Innovation Initiatives for Co-creation Collaboration in the Group SQUARE LAB Sustainability Sustainability Report Toward Net-Zero CO2 Emissions Activities in Environmental Conservation CSR Purchasing News News Release Trade Fairs and Exhibitions MENU HOME Sustainability Activities in Environmental Conservation Management of Closed Mines Activities in Environmental Conservation Management of Closed Mines Gallery inspection at Hanawa Mine From its founding in 1905, the JX Metals Group was engaged in mining operations across Japan. By ensuring a steady supply of nonferrous metals and other resources, we contributed to Japan's economic growth. Today, however, nearly all the mining operations have been stopped* due to the depletion of mineral resources. Currently, the Group is working to maintain and restore the natural environment in and around the closed mines. One such effort is the treatment of acid mine drainage (AMD). Currently, the Kasuga Mine in Kagoshima Prefecture is the only Group mine in Japan still operating. Management Work at Closed Mines Of the 39 closed mines managed by the Company, AMD treatment is an ongoing obligation at 12 mines pursuant to the Mine Safety Act. JX Nippon Mining Ecomanagement is responsible for the work at these mining sites, including AMD treatment and the management of tailings dams. The work mainly consists of treating the highly acidic mine drainage generated from the mines and tailings dams, which contain heavy metals, and maintaining and preserving the tailings dams and galleries of the mining sites. The operation of treatment facilities has to be kept up 365 days a year, since AMD is generated continuously after a mine is closed. This is a result of the chemical reaction of rainwater and other water with ores remaining in the mine and tailings in the dams. How AMD Occurs Motoyama AMD treatment facility at Toyoha Mine Projects to improve mine tailings dam resistance to earthquakes and torrential downpours The Great East Japan Earthquake disaster of March 2011 caused damage to tailings dams at both the Oya and Takatama mines. At the time of this disaster, both structures met building code standards for earthquake-resistant strength and should have been capable of withstanding a "Level1" earthquake event as defined under government scenarios. However, they suffered damage because the intensity of the actual earthquake far exceeded the earthquake-resistance standards the government had assumed would be adequate. Independent standards and the implementation of risk assessments and remedial projects Following the Great East Japan Earthquake, JX Metals Corporation organized a panel of experts (academics and specialists) to re-examine earthquake-resistance standards for mine tailings dam structures and established its own independent standard for resistance to "Level 2" earthquakes (the strongest level for any seismic event anticipated at this time or in the future within the regions reviewed).* At the same time, it also established a stringent independent standard for stability against "guerrilla-style" torrential rains and other concentrated downpours that in recent years have become highly frequent events in regions throughout Japan as one of the effects of climate change. In line with these independent standards, the company then performed risk assessments of its tailings dam structures in 51 locations nationwide, assigned orders of priority to those structures found to be in need of action, and prepared a schedule for the implementation of remedial construction work starting in 2013, with all projects to be completed by 2022. Remedial measures included foundational reinforcement work (to ensure stability against earthquakes) and the expansion and reinforcement of water channels (to ensure adequate drainage capacity during torrential downpours). Subsequent revisions brought national earthquake-resistance standards up to a level comparable to the independent standards established by JX Metals Corporation. Environmental restoration of former mining sites In parallel with measures to improve the safety of tailings impoundment sites, we have also been actively engaged in efforts to environmentally restore former mining sites and their surroundings. An example of environmental restoration: Former Toyoha Mine site near the city of Sapporo in Hokkaido Responding to requests from local community associations, we transformed the tailings dam site at the closed Toyoha Mine into a scenic forest. We are thinning Japanese white birch growing naturally on this site and planting trees in the resulting spaces to maintain the environment. In fiscal 2019, we undertook weeding across an area covering 2,800 square meters. Please browse the section on Reforestation Activities for more information on our efforts in environmental restoration. Sustainability Sustainability TOP Toward Net-Zero CO2 Emissions Activities in Environmental Conservation Activities in Environmental Conservation TOP Reforestation Activities Management of Closed Mines CSR Purchasing CSR Purchasing TOP Gold/Silver, Platinum, and Palladium Supply Chain Policy Menu Contact Us Search Sitemap Page Up Corporate Overview Message from the Management Philosophy Quick Guide to JX Metals Corporation Business Segments Corporate Data Organization and Executive Officers Corporate History Operating Sites and Group Companies Long-Term Vision and Medium-Term Management Plan Purchasing Information Products and Services Search by Category Search by Keyword Research and Development Our Core Technologies Contributing to Societal Growth and Innovation Initiatives for Co-creation Collaboration in the Group SQUARE LAB Sustainability Sustainability Report Toward Net-Zero CO2 Emissions Activities in Environmental Conservation CSR Purchasing News News Release Trade Fairs and Exhibitions Close Page Up Corporate Overview Products and Services Research and Development Sustainability News Privacy Policy Terms of Use Sitemap COOKIE 設定 Copyright © JX Metals Corporation All Rights Reserved.