Under the background of ecological civilization development, mine ecological restoration has evolved from single-purpose environmental remediation toward the transformation of ecological products value. Focusing on Jiangxi Province, a typical southern hilly and mountainous region, a multi-case comparative analysis method was adopted to systematically examine the synergistic pathways between mine ecological restoration and ecological product value realization. Representative abandoned mine restoration projects in Jiangxi Province were selected to comparatively analyze policy instrument application, market-oriented operational mechanisms, multi-stakeholder collaboration modes, and value realization performance, thereby revealing both common characteristics and differences among synergistic pathways. The results indicate that Jiangxi Province has transformed abandoned mines into ecological products such as cultivated land, carbon sinks, and cultural tourism resources through innovative "ecological restoration+" diversified models, while establishing a full-chain value realization mechanism integrating restoration, transformation and value appreciation. Policy support, market-oriented operation, and multi-stakeholder collaboration constitute the three core elements underpinning the efficient functioning of this mechanism. However, constraints related to funding and technology, the absence of clear responsibility and accountability mechanisms, immature market systems, and insufficient policy coordination remain the major obstacles. The obtained results provide replicable and transferable practical pathways for promoting the coordinated enhancement of mine ecological restoration and ecological product value realization in southern hilly and mountainous regions.

To effectively trigger miners' proactive behavior and solve the problem of insufficient internal safety motivation of miners caused by the overemphasis on punishment rather than appreciation and the overemphasis on control rather than communication in mine safety management, and based on cognitive-affective system theory and self-determination theory, a moderated chain mediation model was constructed by introducing in-group identification and family-like exchange as mediating variables and face consciousness as moderating variables. Based on the questionnaire survey, 510 valid data points were collected, and the empirical research method was used to test the hypothesis of the model. The results show that workplace appreciation has a promoting effect on miners' proactive behavior, and the direct effect value is 0.134. In-group identification and family-like exchange play an independent mediating role and a chain mediating role between workplace appreciation and miners' proactive behavior, respectively. Face consciousness positively moderates the relationship between workplace appreciation and in-group identification and family-like exchange, and further positively moderates the indirect mediating effect of in-group identification and family-like exchange. The research results can provide a reference for the implementation of "people-oriented" safety appreciation management in mining enterprises.

In the 17^# thick and large ore body of Zone Ⅲ at Yinman Mining, kaolinized fracture zones develop non-uniformly in the hanging wall and footwall, leading to a high risk of stope collapse and easy softening of the filling body. The conventional upward horizontal cut-and-fill mining method struggles to balance safety and economic efficiency. To address this issue, a progressive zonal cooperative mining concept of "central stable zone-peripheral fracture zone" was constructed. Five methods were employed to calculate the required filling body strength for different zones. Combined with three-dimensional numerical simulation, the effects of mining sequence, stope width, and safe exposure area on the stability of the surrounding rock and filling body system were analyzed. The results indicate that the alternating mining sequence of "extracting one leaving one" (Scheme 3) is the optimal option. This scheme can confine the high-risk plastic zone to approximately 5-7 m within the roof and control the single safe exposure area to approximately 300 m². After adopting the zonal cooperative mining method, the daily production of stopes in the fracture-affected zone stabilizes at 390-400 t. The development ratio and cost per ton of ore are significantly reduced, and roof subsidence is controlled within a range of 30-40 mm. The production capacity of a single sublevel increases to 4 500 t/d, representing an improvement of 60.7%, while the filling cost decreases to 66.3 yuan/t, a reduction of 25.5%. Consequently, the zonal cooperative effects of "improving efficiency and reducing costs while controlling risks and enhancing stability" are achieved.

To achieve the safe and efficient mining of resources under fractured ore-rock conditions in the first mining area of a copper-gold mine, numerical simulation was used to optimize the process parameters of the drift section, the mining spacing of the panel, and the multi-layer collaborative mining interval of the upward drift filling mining method. The feasibility of the optimized parameters was verified through the field industrial test. The results show that the influence of drift width variation on the roof differs for different roof media. The drift section dimensions are determined to be 5 m×5 m, and the interlayer spacing of multi-layer collaborative mining should be not less than 20 m. A "mining one drift after every three drifts" scheme is implemented in the panel area, i.e., the spacing between simultaneously mined drifts in the panel is 15 m. The optimized process parameters were applied to the field industrial test, achieving safe, efficient, and economical mining under unstable ore and rock conditions, indicating that the optimized process parameters are feasible applied to the first mining area of the mine.

To investigate the influence of stope width and stoping sequence on the bearing capacity of panel pillars, this study takes the panel mining using the stage open-stope with subsequent backfill mining method in Sijiaying Iron Mine as the engineering background. The stress response and deformation failure characteristics of panel pillars under different stope widths and stoping sequences were analyzed, and the optimal mining scheme was selected. The research results are as follows. Firstly, stope width and panel stoping sequence jointly influence the stress response characteristics of panel pillars. Under different stoping sequences, both the maximum principal stress and the minimum compressive stress within the pillars exhibit an increasing trend as the stope width increases. Secondly, stope width and panel stoping sequence jointly influence the deformation failure characteristics of panel pillars. Under the same stoping sequence, both the displacement of the pillars and the volume of the plastic zone increase with the increase in stope width. Finally, under the same stope width, the displacement of the pillars and the volume of the plastic zone rank from high to low in the order of "from one side to the other" "from both sides to the center", and "from the center to both sides". Taking into account safety and production capacity of the stope, the optimal mining scheme for this mine has been determined to be a mining width of 20 meters and a mining sequence of "from the center to both sides".

Aiming at the problem of high carbon emission and high cost of traditional cementitious material cement, a new type of cement-fly ash-carbonized steel slag ternary cementitious system (proportion of cement 40%, carbonated steel slag 30%, fly ash 30%) was proposed. Through the synergistic use of industrial solid waste, the goal of low carbon and low cost filling can be achieved. The results are concluded as follows. The reaction between CO₂ and active minerals in carbonated steel slag achieves carbon fixation and performance optimization. The flowability of the filling slurry in the cement-fly ash-carbonated steel slag system is better than that in the cement system. The ball rolling effect of fly ash and the optimized gradation of fine particles of carbonated steel slag synergistically enhance the rheological properties of the slurry. Due to the rapid reaction rate of cement, the 3 d compressive strength ratio of cement-fly ash-carbonated steel slag-based backfill to cement-based backfill is 0.45 to 0.65, while fly ash undergoes sustained hydration in the later stage to form hydration gel, the 7 d and 28 d compressive strengths ratio is increased to more than 0.80. The production cost of cement-fly ash-carbonated steel slag system is 22% lower than that of cement system, and the carbon emission is reduced by 63.6%. Through the resource utilization of steel slag, the problems of solid waste storage, filling cost and carbon emission have been solved simultaneously, which provides an innovative technical path for the goal of carbon neutrality in mining industry.

To address the prevalent issues of uneven rock fragmentation and high boulder rate in high-bench deep-hole blasting within high-altitude cold open-pit metal mines, an enhanced blasting technology utilizing water stemming for open-pit mines was proposed. A numerical simulation method was employed to investigate the spatiotemporal variation patterns of effective stress and damage within the rock mass after explosive detonation under two working conditions: fine sand stemming and water stemming. The mechanism of water stemming enhanced blasting was analyzed. Furthermore, blasting crater tests were conducted at the Xizang Julong Copper Mine to verify the accuracy of the numerical simulation results. The results indicate that during conventional blasting with fine sand stemming, the equivalent stress propagates upward slowly and unevenly, causing most of the blasting energy to concentrate at the bottom of the borehole, resulting in insufficient fragmentation of the upper rock mass. In contrast, during water stemming blasting, due to the incompressibility of water and its excellent stress transmission properties, the blasting stress propagates rapidly and uniformly through the water column to the middle and upper parts of the borehole, leading to effective fragmentation of both the upper and lower rock masses. Compared with fine sand stemming blasting, the upper water stemming blasting increases the maximum surface length, depth, and volume of the blasting crater by 13.33%, 12.07%, and 90.88%, respectively. The research results can provide a reference for efficient blasting and mining in high-altitude cold open-pit metal mines.

Aiming at the problems of roof over-excavation, roof failure and high block rate in the deep mining process of an iron mine, taking the ore body between －360 m and －450 m level of the mine as the engineering background, the optimization of blasting parameters for fan-shaped medium-length holes was carried out. Based on the mechanism of ore rock blasting fragmentation and the theoretical formula of blasting parameters, the theoretical value range of each blasting parameter was derived. Combined with the physical and mechanical properties of ore rock and the performance parameters of on-site explosives, Ansys LS-DYNA numerical simulation software was used to construct a stope blasting model with different hole bottom spacings, explosive unit consumption and resistance line combinations, and the effective stress distribution characteristics of the mine roof were analyzed. The results show that when the hole bottom spacing is 1.4 m and the explosive unit consumption is 2.09 kg/m³, the maximum effective stress of the monitoring grid in the room area is closest to the maximum dynamic tensile strength of the rock, which can fully break the ore rock in the hole bottom area, and the maximum effective stress of the roof monitoring grid does not reach the dynamic tensile strength, and the roof is stable. When the minimum resistance line is 1.6 m, the average maximum effective stress of the monitoring grid near the free surface is 44.31 MPa, and the peak value of blasting vibration velocity in the roof area is 18.51 cm/s, which does not exceed the allowable standard of blasting vibration safety. Based on the optimized parameters (hole bottom spacing 1.4 m, explosive unit consumption 2.09 kg/m³, minimum resistance line 1.6 m), the field industrial test was carried out. The bulk rate is reduced from 6% before optimization to 3%. The roof is well formed, the surface is flat, and there is no obvious crack and collapse. The research results can provide reference for the optimization of fan-shaped medium-length hole blasting parameters in similar deep filling stopes.

To investigate the collaborative optimization problem of blasting effect and drilling and blasting cost under complex working conditions in plateau open-pit mines, an integrated optimization method for hole network parameters combining multi-objective evaluation and numerical simulation verification based on the TOPSIS method was proposed. Based on the actual working conditions of a super-large plateau open-pit mine, the value ranges and comparison schemes of hole network parameters were determined in combination with parameters such as bench height and bench slope angle. Taking blasting effect and drilling and blasting cost as evaluation indexes, the predicted values of evaluation indicators for each comparison scheme were calculated by using the Kuz-Ram blasting fragmentation model and the drilling and blasting cost model. The TOPSIS method was employed to conduct a comprehensive evaluation and ranking optimization of each comparison scheme. Blasting damage numerical simulations for the comparison schemes were performed using the Ansys LS-DYNA software. The results show that the comprehensive scoring ranking of the five schemes is as follows: Scheme 3 (0.559) > Scheme 2 (0.544) > Scheme 4 (0.528) > Scheme 1 (0.507) > Scheme 5 (0.493), indicating that Scheme 3 achieves the highest comprehensive score. In the blasting damage nephogram of the optimal Scheme 3 (hole spacing of 10 m × row spacing of 8.5 m), the strongly fragmented zone, the fracture development zone, and the weakly damaged zone are evenly distributed. The blasting damage range achieves a relatively balanced control between effective fragmentation and excessive damage, thereby realizing an optimized balance between blasting effect and drilling and blasting cost. The research results can provide a reference for the optimization of blasting hole network parameters in open-pit mines.

The joint bedding structures in the roadway will change the stress propagation and failure mode of the rock mass under the blasting load, and affect the cutting blasting effect and driving efficiency. In order to reveal the influence mechanism of bedding structure on the response of cut blasting, a quasi-three-dimensional finite element model of roadway considering joint dip angle was constructed based on the engineering background of a mine roadway. The ALE fluid-solid coupling algorithm was used to compare and analyze the characteristics of stress wave propagation and damage evolution under the conditions without bedding and with bedding. The results show that the bedding structure significantly weakens the stress wave coupling strength, and the average effective stress decreases by 61.64%, which causes the difficulty in forming effective penetration in the central area of the cut. Regarding this issue, an improvement scheme for adding auxiliary cutting holes was proposed. The results of numerical simulation and field test show that the improved scheme effectively enhances the energy aggregation effect in the central area of the cut, and forms a typical "through-type high-damage channel". The rock mass is more fully broken, the continuity is better, and the bulk rate is significantly reduced. The research results can provide theoretical support and engineering reference for cutting blasting design under complex structural plane conditions.