Abstract: Large-scale ground fissures development exacerbates ecosystem degradation, damages engineering infrastructure, and poses constraints on regional ecological security and socio-economic development. To characterize the scale characteristics of fissures under high-intensity mining and establish an effective prevention and control system, taking the 615 working face of Guanbanwusu mine as the research background. Division of the overlying strata structure was based on the combined rock strata theory, with a quantitative characterization method using fracture rate proposed for the fissure development process. Quantitative relationships between the depth-thickness ratio and ground fissure scale parameters (maximum width, average penetration and average advance distance) were revealed, and the corresponding collaborative control technology was proposed. The results demonstrate that the overlying strata damage is divided into four vertical zones (based on the arrangement of thick-hard strata and collapsed blocks) and five horizontal zones (based on the influence degree). Four combined rock strata structures of the overlying strata are determined, and step fracture in overlying strata ultimately propagates fissures to the surface. The increase of rock fragmentation near the goaf enhances the skewness and irregularity of the subsidence curve. The depth-thickness ratio shows a negative linear correlation with the maximum fissure width, and a negative exponential correlation with both the average penetration and advance distance. A decreasing depth-thickness ratio induces a transition in fissure type, from tensile and step-type manifestations to collapse and step-type forms. Based on these findings, the collaborative control technology of ground fissures is proposed. Key measures include: minimizing surface subsidence by optimizing mining sequences; enhancing the overlying strata structural arch stability via geophysical positioning and targeted repair; implementing zone-specific treatment strategies based on fissure classification and spatial zonation characteristics, and facilitating the restoration of the regional ecological environment. This research provides significant insights for safeguarding regional ecological security and human settlements.