Establishing mining deposit groups and exploration grid patterns in the Binh Minh Coal Mine, Quang Ninh Province by using Geo-mathematical models
- Authors: An Manh Do 1 *, Dung Tien Nguyen 1, Thao Thanh Thi Nguyen 1, Huan Hoang Nguyen 2, Anh Tuan Pham 2, Tuan Ba Dinh 2
1 Hanoi University of Mining and Geology, Hanoi, Vietnam
2 Vinacomin Informatics, Technology, Environment Joint stock Company, Hanoi, Vietnam
- Keywords: Binh Minh Coal Mine, Deposit group, Exploration grid pattern, Mathematical model, Quang Ninh.
- Received: 23rd-Nov-2021
- Revised: 17th-Mar-2022
- Accepted: 5th-Apr-2022
- Online: 30th-Apr-2022
- Section: Geology - Mineral
Binh Minh mine is one of the major mines of the Quang Ninh coal basin and contributes significantly to the country's annual coal reserves. Based on collected data, the paper has synthesized and processed geological data especially applied mathematical methods to identify research objects and describe quantitative properties. The results indicate that the coal seams belong to the group of medium and thick seams, the thickness of the entire seam changes complicatedly, with variable thickness are unstable, its coefficient of variation (Vm = 53.5 and 97.7%); the variable slope angle is stable (Vα = 29.4 and 44.1%); coal ash level is relatively stable (VA = 56.1 and 74.6%). Coal seams in the group of seams have a level of complexity from simple to relatively complex with the coefficient of formation (Kcc = 0.84 and 0.96); rate of interbedding rock (Kk = 8 and 24%); thickness of interbedding rock (Mk = 0.16 and 1.34 m). Quantitative calculation results have shown that the Binh Minh coal deposit belongs to the type III of mining exploration groups. For an exploration of this type of mineral, it is recommended to use a linear grid pattern. The appropriate exploration grid pattern for reserve level 122 is (200÷250)×(90÷100) m. Research results are the basis for proposing technical means of coal exploration in mines and areas with similar geological and mineral conditions.
Do, M.A., Nguyen, T.D., Bui, H.B., Khuong, T.H. (2018). Morphological and structural features of coal beds and their influence on the exploration and exploitation in southern wings of Mao Khe Mine, Quang Ninh. Journal of Mining and Earth Sciences, Vol. 59, No. 2, pp. 40-48. (in Vietnamese)
Heriawan, M.N., and Koike, K. (2008). Identifying spatial heterogeneity of coal resource quality in a multilayer coal deposit by multivariate geostatistics. International Journal of Coal Geology, Vol. 73, No. 3, pp. 307-330. https://doi.org/10. 1016/j.coal. 2007.07.005
Hindistan, M.A., Tercan, A.E., and Ünver, B. (2010). Geostatistical coal quality control in longwall mining. International Journal of Coal Geology, Vol. 81, No. 3, pp. 139-150. https://doi.org/10.1016/j. coal.2009.12.014
Hung, K.T., Khang, L.Q., Sang, P.N., and Vuong, H.V. (2021). Establishing a Tungsten Deposit Group and a Pattern Grid Exploration in the Nui Phao Area, Northeastern Vietnam. Proceedings of the International Conference on Innovations for Sustainable and Responsible Mining, pp. 58-78.
Khang, L.Q., Hung, K.T., Tuong, N.V., Thu, L.T. (2020). Study on establishing a mining group of deposits and an exploration grid pattern for lead-zinc ore in the Ban Lim area, Cao Bang province. Journal of Mining and Earth Sciences, Vol. 61, No. 3, pp. 38-50.
Le, H. (ed.), (1996). Report on the mapping of geological and mineral resources at a scale of 1:50,000 of Cam Pha sheet group, Quang Ninh. Vietnam Institue of Geoscience and Mineral resources. (in Vietnamese)
Nguyen, V.S. (ed.) (2012). Report on the results of the phase I investigation of the project to investigate and evaluate coal potential under -300 m in the Quang Ninh coal basin. Department of Geology and Mineral Resources. (in Vietnamese)
Olea, R.A., Luppens, J.A., and Tewalt, S.J. (2011). Methodology for quantifying uncertainty in coal assessments with an application to a Texas lignite deposit. International Journal of Coal Geology, Vol. 85, No. 1, pp. 78-90. https://doi.org/10. 1016/j.coal.2010.10.001
Pham, T.A. (ed.) (2010). Report on results of calculation and conversion of reserves and resource levels of the Binh Minh coal mine, Ha Long, Quang Ninh. Vinacomin-Informatics, Technology, EnvironmentJoint Stock Company. (in Vietnamese)
Saikia, K., and Sarkar, B.C. (2006). Exploration drilling optimization using geostatistics: a case in Jharia Coalfield, India. Applied Earth Science, Vol. 115, No. 1, pp. 13-22. https://doi.org/10.1179/174 327506X102787
Saikia, K., Sarkar, B.C., and Sinha, P.M. (2007). Application of kriging and simulated annealing for spatial variability modeling of a coal seam. Applied Earth Science, Vol. 116, No. 1, pp. 37-48. https://doi.org/10.1179/174327507X167000
Saikia, K., and Sarkar, B.C. (2013). Coal exploration modeling using geostatistics in Jharia coalfield, India. International Journal of Coal Geology, Vol. 112, pp. 36-52. https://doi.org/10. 1016/j.coal.2012.11.012
Sarkar, B.C., Saikia, K., Sarma, M., Pandey, S., and Paul, P.R. (2007). A geostatistical approach to the estimation of coal bed methane potentiality in a selected part of Jharia coalfield, Jharkhand. Journal of Mines, Metals and Fuels, Vol. 55.