The International Council on Mining and Metals (ICMM), the United Nations Environment Programme (UNEP) and the Principles for Responsible Investment (PRI) co-convened the Global Tailings Review to establish an international standard for the safer management of tailings storage facilities - this is the GISTM.
The standard can be downloaded here, and the International Council on Mining & Metals (ICMM) Conformance Protocols for the GISTM can be downloaded here.
The Canadian Towards Sustainable Mining (TSM) standard is very comprehensive and a number of related guides to TSM can be found on the MAC website here.