In this research work, there were four group characteristics (main, intrinsic, geological, and mining characteristics with 3, 5, 5, and 5 elements, respectively) and 15 experts.
Generally speaking, the important characteristics that influence the coal spontaneous combustion capability can be classified into three major categories: intrinsic, geological, and mining characteristics.
Therefore, there were fifteen 3 × 3, fifteen 5 × 5, fifteen 5 × 5, and fifteen 5 × 5 pairwise comparison matrices for the main, intrinsic, geological, and mining characteristics, respectively.
Based on geological and mining characteristics, roadways under complex conditions were divided into five types (Kang and Wang 2007): (1) Loose and soft type.
It should be noted that obtaining the intrinsic, geological, and mining characteristics of each seam under study involves field sampling and laboratory works.
Higher coarse fraction in RMS attributed due to nature of mining, characteristics of rocks, measures taken during technical reclamation and amount of top soil application.
In this paper, a new classification was developed based on the fuzzy Delphi analytic hierarchy process (FDAHP) technique and using the intrinsic, geological, and mining characteristics, named CSCPI.
Based on geological and mining characteristics, coal mine roadways under complex conditions were divided into five types, for each type the deformation and damage characteristics of rocks surrounding roadways were analyzed.
For this purpose, according to the questionnaire, 4 comparison matrices were established for each expert (matrices 1, 2, 3, and 4 for main, intrinsic, geological, and mining characteristics, respectively; totally 60 comparison matrices).
After recognition of the roles of the effective parameters influencing the initiation of a spontaneous combustion, a series of intrinsic, geological, and mining characteristics of coal seams are investigated.
