Research and prevention of upper remaining coal spontaneous combustion induced by air leakage in multi-inclination regenerated roof: A case study in the Luwa coal mine, China

被引：15
作者：
Chen J. [1 ]
Lu Y. [1 ,2 ]
Tang G. [1 ]
Yang Y. [1 ]
Shao S. [1 ]
Ding Y. [3 ]
机构：
[1] School of Resource, Environment and Safety Engineering, Hunan University of Science and Technology, Hunan, Xiangtan
[2] Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Xiangtan Hunan
[3] Shandong Lutai Holding Group Co., Ltd., Luwa Coal Mine, Jining
来源：
Energy | 2023年 / 275卷
基金：
中国国家自然科学基金;
关键词：
Air leakage intensity; Coal spontaneous combustion; Coal spontaneous combustion limit parameters; Nano-particle foam slurry; Regenerated roof;
D O I：
10.1016/j.energy.2023.127484
中图分类号：
学科分类号：
摘要：
Coal is a widely used fossil energy. The multiple mining and stratified mining technology effectively improves its utilization. However, the regenerated roof formed in this process induces coal spontaneous combustion by air leakage. Therefore, by the governing equation of fluid dynamics, the remaining coal spontaneous combustion characteristics of regenerated roof were studied, the risk area was delineated by numerical simulation and field experiments, the composite fire extinguishing technology was proposed. The results showed that air leakage intensity and coal particle size were easily affected by mining disturbance, especially near the surface of the roadway, under the influence of concentrated stress, the particle size of coal decreasing, the cracks penetrating, the air leakage intensity increasing. When the inclination angle of the regenerated roof increased, oxidation-zone was easy to form near the turning point. The air leakage crack near the surface of the roadway increasing, forming a cooling-zone, the fire-zone was formed behind the turning point, which had a low wind speed, creating a good heat storage environment. The decline in index gas concentration and fire-zone temperature illustrated that the composite fire extinguishing technology has a good prospect in controlling the coal spontaneous combustion of regenerated roof. © 2023 Elsevier Ltd
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  • [1] Huang Q., Xu J.P., Bi-level multi-objective programming approach for carbon emission quota allocation towards co-combustion of coal and sewage sludge, Energy, 211, (2020)
  • [2] Qin S.Y., Zhang X.Z., Wang M., Cui H.Y., Li Z.H., Yi W.M., Comparison of BGL and Lurgi gasification for coal to liquid fuels (CTL): process modeling, simulation and thermodynamic analysis, Energy, 229, (2021)
  • [3] Wang N., Wen Z.G., Liu M.Q., Guo J., Constructing an energy efficiency benchmarking system for coal production, Appl Energy, 169, pp. 301-308, (2016)
  • [4] Spodyniuk N., Gulai B., Zhelykh V., Shapoval S., Leveling of pressure flow of radial ventilator in mine ventilation system, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 6, pp. 80-86, (2019)
  • [5] Zhuo H., Qin B.T., Qin Q.H., The impact of surface air leakage on coal spontaneous combustion hazardous zone in gob of shallow coal seams: a case study of Bulianta Mine, China, Fuel, 295, (2021)
  • [6] Pan C., Xia B.W., Zuo Y.J., Yu B., Ou C.N., Mechanism and control technology of strong ground pressure behaviour induced by high-position hard roofs in extra-thick coal seam mining, Int J Min Sci Technol, 32, 3, pp. 499-511, (2022)
  • [7] Hu R., Wu J.W., Zhai X.R., Shi W.B., Huang K., Structural characteristics of regenerated roof and distribution law of overburden porosity in downward mining of a bifurcated coal seam, Geofluids, 4, pp. 1-17, (2022)
  • [8] Lu Y., Yan Z.H., Shi S.L., Wang G.F., Li H., Niu H.Y., Et al., Delineation and prevention of the spontaneous combustion dangerous area of coal in a regenerated roof: a case study in the zhoujing coal mine, China, Energy Fuels, 34, 5, pp. 6401-6413, (2020)
  • [9] Qin B.T., Lu Y., Experimental research on inorganic solidified foam for sealing air leakage in coal mines, Int J Min Sci Technol, 23, pp. 151-155, (2013)
  • [10] Lu Y., Chen J., Shao S.Z., Shi S.L., Ding Y.W., Li L., The mechanism of the control mechanism of the self-ignition leakage of the regenerative roof coal, J China Coal Soc, 48, 2, pp. 795-805, (2023)
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