Vulnerability Analysis of Soft Caving Tunnel Support System and Surrounding Rock Optimal Control Technology Research

Table 18

Summary of the vulnerability of mine tunnel.

		Vulnerability indicators of tunnel’s supporting systems											Vulnerability
		A	B	C	D	E	F	G	H	I	J	K	𝑌𝑗	Vulnerability grade
Mine name	Xian Dewang mine	30.57	25.37	5.45	12.6	460	II	5	7.33	0.361	27	31	6.628	Higher
	Gu Shuyuan mine	75.6	105.35	17.79	11.25	210	I	30	0.7	0.036	2	8	4.946	Lower
	Yang Quan 1#mine	44	33	15.4	10.5	370	II	≥50	5.27	0.403	15	25	5.158	Lower
	Xia Gou mine	37	30	16.9	10.3	350	I	10	10	0.194	23	36	7.464	Highest
	Chang Cun mine	12	51.3	13.3	14.07	400	II	≥50	7.15	0.438	8	19	4.78	Lower
	Si He mine	68	75.56	21.9	19.25	400	IV	15	5.3	0.289	9	8	5.144	Lower
	Dong Tan mine	28	38	17.5	14.5	560	II	2	6.05	0.308	17	15	5.564	Moderate
	Xiao Kang mine	8	17.6	14.2	10.2	525	II	≥50	5.4	0.356	70	35	6.912	Higher

A: integrity of surrounding rock; B: roof rock strength; C: coal strength; D: tunnel’s section size; E: depth of tunnel; F: geological structure; G: impact of coal pillar; H: thickness of strengthened rock; I: tunnel support strength; J: tunnel’s repair rate; K: construction quality coefficient.