Comprehensive gas treatment technology practice for 81305 comprehensively drained working face in Baode Coal Mine

doi:10.16265/j.cnki.issn1003-3033.2024.S1.0116

Abstract

Abstract:

In order to realize mining in high gas mines in low gas states, a set of comprehensive gas treatment technology based on over-pre-pumping of coal seam gas, pumping while mining, and pumping and mining in the goaf area was proposed. The comprehensive gas treatment technology and measures for 81305 comprehensively drained working face in Baode Coal Mine were introduced, and the comprehensive gas treatment measures were recorded in detail, such as pre-pumping before mining of the present coal seam, switching between downdraft and updraft, pumping and drainage by buried pipeline in goaf area, pressure equalizing, air guide curtain and negative pressure spray setting, rationally distributed air flow, and closing at the end of mining. The results show that the volume of the gas pumping and drainage in the 81305 working face has reached a total of 18.549 1 million m³, and the comprehensive pumping and drainage rate has reached 81.07%, indicating excellent application effects. The comprehensive gas treatment technology combining various pumping and drainage methods can make the gas concentration in the comprehensively drained working face in Baode Mine safe and controllable during mining.

Key words: high gas mines, comprehensively drained working face, comprehensive gas treatment, mine ventilation, gas pumping drainage

CLC Number:

X936

YUAN Baofa. Comprehensive gas treatment technology practice for 81305 comprehensively drained working face in Baode Coal Mine[J]. China Safety Science Journal, 2024, 34(S1): 109-114.

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下行风时的配风量/ (m³·min^-1)	瓦斯体积分数/%						风排瓦斯量/ m³
	工作面		上隅角		尾排巷
	平均	最大	平均	最大	平均	最大
1 932	0.28	0.38	0.30	0.32	0.48	0.58	6.37
2 163	0.46	0.56	0.46	0.56	0.62	0.74	9.22
2 251	0.34	0.40	0.40	0.44	1.10	1.12	9.67
2 300	0.38	0.44	0.46	0.48	1.20	1.38	10.35

上行风时的配风量/ (m³·min^-1)	瓦斯体积分数/%				风排瓦斯量/ m³
	工作面		上隅角
	平均	最大	平均	最大
2 351	0.38	0.44	0.46	0.48	8.93
2 449	0.30	0.32	0.42	0.48	7.35
2 264	0.30	0.38	0.46	0.56	6.79

上行风时配风量/ (m³·min^-1)	瓦斯体积分数/%				风排瓦斯量/ m³	采空区第二套泵抽放量/m³
	工作面		上隅角			抽放量/ (m³·min^-1)	抽放瓦斯体积分数/%	瓦斯量/ (m³·min^-1)
	平均	最大	平均	最大		抽放量/ (m³·min^-1)	抽放瓦斯体积分数/%	瓦斯量/ (m³·min^-1)
1 781	0.28	0.32	0.44	0.52	4.99	289	3.14	9.07
	0.34	0.42	0.52	0.58	6.06	280	3.12	8.74
	0.34	0.38	0.44	0.48	6.06	278	3.14	8.73

上行风时的配风量/ (m³·min^-1)	瓦斯体积分数/%				风排瓦斯量/ m³	采空区一、二套泵抽放量/m³
	工作面		上隅角			抽放量/ (m³·min^-1)	抽放瓦斯体积分数/%	瓦斯量/ (m³·min^-1)
	平均	最大	平均	最大		抽放量/ (m³·min^-1)	抽放瓦斯体积分数/%	瓦斯量/ (m³·min^-1)
1 751	0.34	0.36	0.34	0.38	5.95	520	3.14	16.33
	0.20	0.24	0.32	0.36	3.50	524	3.14	16.45
	0.30	0.32	0.36	0.38	5.25	530	3.12	16.54

瓦斯涌出量类别	瓦斯量/万m³
掘进及备用面期间风排量	263.25	11.51
本煤层预抽量	220.45	9.60
采空区抽放量	853.18	37.29
回采期间风排量	518.03	22.64
合计	1 854.91	81.07