A Large Goaf Group Treatment by means of Mine Backfill Technology

Table 5

Statistical results of goaf volume in 888 m level.

Stop number	Stope position	Stope span (m)	Stope height (m)	Stope thickness (m)	Exposed area of roof (m^2)	Exposed perimeter of roof (m)	Goaf volume (m^3)	Results of stability graph method
888–1#	9–11 line	41.5	18	6	249	95	247.1	Transition zone
888–2#	11–13 line	41.5	15	5	207.5	93	148.6	Transition zone
888–3#	17–19 line	41	25	3	123	88	192.2	Transition zone
888–4#	21–23 line	41	25	3	123	88	190.6	Caving zone
888–5#	23–25 line	42	25	20	840	124	1051.0	Caving zone
888–6#	25–27 line	41	30	5	205	92	232.1	Transition zone
888–7#	25–27 line	42	25	5	210	94	643.7	Transition zone
888–8#	27–27 line	42	30	15	630	114	1133.7	Caving zone
888–9#	27–29 line	41	25	3	123	88	77.1	Stable zone
888–10#	27–29 line	42	25	5	210	94	242.2	Transition zone
888–11#	29–31 line	42	20	10	420	104	655.6	Caving zone
888–12#	29–31 line	41	30	6	246	94	451.0	Transition zone
888–13#	31–33 line	43	8	18	774	122	319.3	Caving zone
888–14#	31–33 line	43	34	5	215	96	323.1	Transition zone
888–15#	33–35 line	44	34	17	748	122	1138.5	Caving zone
888–16#	35–37 line	44	34	6.5	286	101	572.9	Transition zone
888–17#	37–39 line	42	34	3	126	90	459.2	Stable zone
888–18#	39–41 line	41	10	2	82	86	37.8	Stable zone
888–19#	55–57 line	10	8	5	50	30	3177.9	Stable zone
888–20#	55–57 line	5	15	15	75	40	230.8	Stable zone
888–21#	57–59 line	10.3	12	4	41.2	28.6	1413.1	Stable zone
888–22#	59–61 line	30.2	8	10	302	80.4	2005.9	Transition zone
888–23#	61–63 line	27.2	15	7	190.4	68.4	2782.0	Transition zone
888–24#	63–65 line	38.9	14	2	77.8	81.8	2653.3	Stable zone
888–25#	63–65 line	45	14	8	360	106	863.9	Transition zone
888–26#	65–67 line	24	15	2	48	52	601.9	Stable zone
888–27#	65–67 line	22.8	15	3	68.4	51.6	534.3	Stable zone
888–28#	65–67 line	21.4	15	3	64.2	48.8	479.1	Stable zone
888–29#	67–69 line	21.9	14	2	43.8	47.8	621.4	Stable zone
888–30#	67–69 line	20.8	15	6.5	135.2	54.6	179.4	Stable zone
888–31#	69–71 line	33.8	6	10	338	87.6	824.2	Transition zone
888–32#	69–71 line	40	7.5	2	80	84	264.6	Stable zone
Total	24747.5