Establishing mining deposit groups and exploration grid patterns in the Binh Minh Coal Mine, Quang Ninh Province by using Geo-mathematical models

Abstract

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.