This document summarizes feedback that was obtained during the brainstorming session held at the 32nd GMI Coal Mines Subcommittee meeting on 22 March 2023. Participants consisted of GMI Delegates, GMI Project Network members, and United Nations Economic Commission for Europe (UNECE) Group of Experts on CMM. The brainstorming session aimed to identify approaches and solutions to the three CMM project barriers that were ranked as being the most relevant.