In the golden autumn season, the air is filled with the fragrance of fruitful harvest. In the experimental fields of Shengyou Village, Daliuta Town, Shenmu, Shaanxi, a scene of abundance unfolds—corn stalks stand lush and sturdy, and chufa sedge tubers are plump and round. This special land, with its substantial yield, proclaims a breakthrough achievement: the successful application of coal gangue soil-utilization technology independently developed by CCTEG Eco-Engineering. Formerly piled mountain-high, the coal gangue has now been successfully "transformed" into artificial soil. This not only revitalizes reclaimed land but also pioneers a new technical pathway for the synergistic development of efficient coal-based solid waste resource utilization and mining area ecological restoration.

Tracing the Path of Technological Development

CCTEG Eco-Engineering anchored its efforts on the development goal of achieving a "win-win for both ecological benefits and resource utilization." Since early 2023, it formed a dedicated R&D team, core members holding PhDs in soil science, focused on the key challenge of coal gangue soil-utilization. Progressing from basic formula research to process optimization, the team gradually overcame technical hurdles. Following successful pot experiments and small-plot verification in eastern mining areas, the team advanced suitability research, optimizing technical parameters for the climate and geological characteristics of western mining areas to continuously enhance the technology's regional adaptability and application effectiveness.

Deepening Trials with Scientific Rigor

In October 2024, supported by both national and Shaanxi Provincial Key R&D Programs and the group corporation's technological innovation fund, CCTEG Eco-Engineering partnered with Shengyou Village, Daliuta Town to co-establish a doctoral workstation, initiating the construction of a high-value economic plant production test base on reclaimed mining land. To accurately assess the technology's application effect in semi-arid mining areas, the R&D team took root in the test fields, meticulously observing and recording key data such as soil moisture and crop growth, and adjusting cultivation plans in real-time, ensuring the trial's progress with rigorous scientific dedication.

Promising Results Validate Feasibility

The test results demonstrate that the team's coal gangue-based soil improvement material can provide sufficient nutrients for plant growth. Under an artificial soil substrate with a 60% coal gangue mixture, crops like corn and chufa sedge planted in the test fields not only grew normally but also achieved high yields. Preliminary estimates indicate a chufa sedge wet weight yield nearing 1,500 jin per mu, a corn silage yield of approximately 3 tons per mu, and a sorghum above-ground biomass reaching around 2 tons per mu. These indicators are comparable to those of surrounding conventional farmland, strongly validating the feasibility and economic potential of this technical pathway.

Looking Ahead: Expanding Impact

Looking forward, CCTEG Eco-Engineering will continue to deepen technological innovation, focusing on enhancing the quality of coal gangue artificial soil substrates, screening suitable plant varieties, and improving supporting cultivation techniques. It will promote the application and transformation of these technological achievements across more mining areas, contributing central enterprise wisdom and CCTEG strength to the construction of green mines and the development of ecological industries in semi-arid regions.