A Large Goaf Group Treatment by means of Mine Backfill Technology

Table 4

Statistical results of goaf volume in 848 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
848–1#	Of 3–5 line	35	15	15	525	100	549.7	Caving zone
848–2#	3–5 line	20	15	13	260	66	419.8	Caving zone
848–3#	Of 5–7 line	32	20	10	320	84	353.1	Caving zone
848–4#	5–7 line	30	12	12	360	84	351.9	Caving zone
848–5#	7–9 line	39	20	10	390	98	444.4	Caving zone
848–6#	9–11 line	42	20	7	294	98	287.2	Transition zone
848–7#	9–11 line	41	20	5	205	92	164.0	Transition zone
848–8#	9–11 line	20	20	5	100	50	108.3	Transition zone
848–9#	11–13 line	40	20	2	80	84	381.2	Stable zone
848–10#	11–13 line	40	20	8	320	96	95.1	Caving zone
848–11#	19–21 line	45	18	15	675	120	706.1	Caving zone
848–12#	21–23 line	42	22	15	630	114	1175.0	Caving zone
848–13#	23–25 line	40	30	5	200	90	405.3	Transition zone
848–14#	25–27 line	40	34	12	480	104	1103.6	Caving zone
848–15#	27–29 line	35	34	8	280	86	667.9	Transition zone
848–16#	29–31 line	35	34	8	280	86	616.5	Transition zone
848–17#	31–33 line	41	34	7	287	96	576.6	Transition zone
848–18#	31–35 line	41	34	4	164	90	393.4	Transition zone
848–19#	35–37 line	42	34	3	126	90	220.1	Transition zone
848–20#	53–55 line	30	4	58	1740	176	195.1	Caving zone
848–21#	55–57 line	42	30	45	1890	174	2408.9	Caving zone
848–22#	57–59 line	45.5	35	2.5	113.75	96	1255.2	Stable zone
848–23#	57–59 line	32	34	9	288	82	5993.7	Transition zone
848–24#	61–63 line	45.2	15	3	135.6	96.4	795.0	Stable zone
848–25#	63–65 line	40	34	4.5	180	89	4680.7	Stable zone
848–26#	67–69 line	40	20	7	280	94	5566.0	Transition zone
Total	29913.8