Multifactor Evaluation of Multiple Service Support and Optimization of Working Resistance of New Support Based on Dynamic Pressure

Table 4

Various parameters of index factors.

Primary index factor	Combination weight value ωi	Secondary index factor	Combination weight value ωij	Index factor membership value fj	ωij ∗ fj
B1 personnel factor	0.0528	C1 quality of personnel	0.265	0.833	0.221
		C2 technician training	0.140	1	0.140
		C3 safety consciousness	0.088	0.8	0.070
		C4 average length of service	0.507	0.843	0.427
B2 equipment factor	0.4736	C5 valve leakage	0.038	0.4	0.015
		C6 column failure	0.199	0.28	0.056
		C7 irregular moving support	0.186	0.503	0.093
		C8 resistance loss rate	0.160	0.4	0.064
		C9 support part failure	0.047	0.58	0.027
		C10 pitch angle of support	0.080	0.763	0.061
		C11 initial supporting force	0.290	0.028	0.008
B3 geological factors	0.2263	C12 coal seam dip angle	0.056	1	0.056
		C13 coal hardness	0.086	0.6	0.051
		C14 geological structure	0.227	1	0.227
		C15 buried depth of coal seam	0.071	1	0.071
		C16 rock burst tendency	0.214	1	0.214
		C17 direct roof thickness	0.130	0.25	0.032
		C18 mining height	0.216	0.8	0.173
B4 management factor	0.2473	C19 safety production responsibility	0.417	1	0.417
		C20 accident prevention and treatment	0.060	1	0.060
		C21 reward and punishment policy	0.125	1	0.125
		C22 safety inspection system	0.125	1	0.125
		C23 safety input	0.273	1	0.273