Bibliographic Details
| Title: |
基于熵权—可拓理论的综放工作面经济混矸率评价研究. |
| Alternate Title: |
Study of evaluation of economic rock-mixed ratio of longwall top-coal caving working face based on entropy weight-extension theory. |
| Authors: |
王伸1,2,3 wangshen@hpu.edu.cn, 李瑞祥1 Idy2005@hpu.edu.cn, 李东印1,2,3, 吕朋4, 冯茹1, 李红斌1,2,3, 王文1,2,3 |
| Source: |
Coal Science & Technology (0253-2336). 2025 Supplement, Vol. 53, p64-79. 16p. |
| Subject Terms: |
*Longwall mining, *Coal mining, *Industrial costs, *Evaluation methodology, *Mines & mineral resources, *Geotechnical engineering |
| Abstract (English): |
The rock-mixed ratio of top-coal caving mining significantly affects the coal quality and economic benefits. This ratio at long-wall top-coal caving (LTCC) faces is jointly determined by multiple factors, including geological conditions, extracting and caving techno-logy, and mining technical level. For specific production geological conditions and coal caving parameters, there exists an optimal rock-mixed ratio for LTCC faces. When the rock-mixed ratio of raw coal mined from LTCC faces is controlled at this value, the coal mine achieves the maximum long-term economic benefits, and this optimal rock-mixed ratio is defined as the economic rock-mixed ratio. To scientifically determine the economic rock-mixed ratio of LTCC faces and identify the main controlling factors affecting the rock-mixed ratio, field investigations and theoretical analyses were conducted to examine the formation mechanism of gangue mixing in topcoal caving and the key factors influencing the rock-mixed ratio at LTCC faces. By exploring the relationships between the rock-mixed ratio and raw coal production, coal price, and production costs, a theoretical model for the rock-mixed ratio of LTCC faces was established. This model is designed to ascertain the economic rock-mixed ratio for a given LTCC face under its current production conditions. Based on the entropy weight-extension theory, an evaluation index system was proposed, incorporating three criterion layers: geological conditions, top-coal caving technology, and top-coal caving parameters. Subsequently, an evaluation method for the main control factors affecting the rock-mixed ratio of LTCC faces was established. This methodology was then applied to conduct a comprehensive evaluation of the LTCC face No.8222 at Tashan Coal Mine. The results indicate that: the economic rock-mixed ratio for face No.8222 at Tashan Mine under its current production conditions is 12.6%; geological conditions are the most dominant controlling factor influencing its rock-mixed ratio; and the thickness of gangue partings within the top-coal and the drawing interval have a particularly significant impact on the rock-mixed ratio for this LTCC face. The research findings provide a scientific basis for determining the economic rock-mixed ratio of FMTC faces, analyzing the primary controlling factors affecting rock-mixed ratio, and optimizing the top-coal drawing process and its associated parameters. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
放顶煤混矸率显著影响煤炭质量和经济效益, 地质条件、采放工艺、开采技术水平等多方面 因素共同决定了综放工作面混矸率。对于具体的生产地质条件和放煤技术条件, 综放工作面存在最佳混矸率, 如果综放工作面开采原煤的混矸率控制在此数值时, 煤矿获取的后期经济效益最大, 该最佳混矸率即为经济混矸率。为科学确定综放工作面经济混矸率, 找出影响混矸率的主控因素, 采用现场调研、理论分析等方法对放顶煤混矸形成机制及影响放顶煤工作面混矸率的主要因素进行了分析; 探讨了混矸率与原煤产量、煤炭价格和生产成本之间的关系, 建立了综放工作面经济混矸率理论模型, 以确定待评价综放工作面在当前生产条件下的经济混矸率。基于熵权—可拓理论, 提出了包含地质条件、放煤工艺和放煤参数 3 个准则层的评价指标体系, 建立了影响综放工作面混矸率主控因素的评价方法, 并对塔山矿 8222 放顶煤工作面混矸率进行综合评价。研究表明: 塔山矿 8222 工作面在当前生产条件下经济混矸率为 12.6% ;地质条件是影响塔山矿 8222 工作面混矸率最重要的主控因素; 顶煤夹矸厚度和放煤步距对塔山矿 8222 放煤工作面混矸率影响较为显著。研究成果可为科学确定综放工作面经济混矸率、分析混矸率主控因素、优化放煤工艺及参数提供依据。 [ABSTRACT FROM AUTHOR] |
| Database: |
Energy & Power Source |
