Abstract: Abandoned mine ecological rehabilitation projects have achieved substantial progress in ensuring geological stability and controlling ecological risks. However, many projects continue to face constraints in industrial integration and long term operation after engineering completion. This limitation largely arises from the failure to translate engineering governance constraints into actionable operational rules. To address this widespread challenge, a “threshold translation” mechanism hypothesis oriented toward abandoned mine rehabilitation practice is proposed, aiming to elucidate the internal logic by which engineering thresholds are transformed into operational access conditions and functional zoning rules. Based on a systematic review of existing studies on abandoned mine rehabilitation and reuse, a threshold translation analytical framework is developed, centered on engineering safety, ecological constraints, and land use feasibility. The rehabilitation project in Baoqing County, Shuangyashan City, Heilongjiang Province is selected as a representative case to verify the proposed mechanism. In addition, comparative analyses of mine regeneration projects in Changsha Dawangshan, Chongqing Tongluoshan, and Nanjing Tangshan are conducted to examine the applicability of the threshold translation mechanism across different contexts. The results indicate that explicitly translating engineering governance indicators into operational rules facilitates the parallel implementation of rehabilitation engineering and industrial development, thereby enhancing long term operational viability and economic regeneration potential. A verifiable, replicable mechanism-based explanatory framework is thus provided for the transformation of abandoned mine ecological restoration from engineering compliance toward sustained utilization.