魏家地煤矿钻孔静压注水治理瓦斯技术

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0014

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (S2): 60-64.doi: 10.16265/j.cnki.issn1003-3033.2023.S2.0014

魏家地煤矿钻孔静压注水治理瓦斯技术

文建东¹(), 刘烜²^,^**(), 李作泉³, 苗在全¹, 王贝贝¹

¹ 甘肃靖煤能源有限公司魏家地煤矿分公司, 甘肃白银 730913
² 辽宁工程技术大学矿业学院, 辽宁阜新 123000
³ 甘肃靖煤能源有限公司, 甘肃白银 730913

收稿日期:2023-07-12 修回日期:2023-09-29 出版日期:2023-12-30
通讯作者:
**刘烜(1997—),男,甘肃武威人,硕士研究生,研究方向为矿山安全与灾害防治。E-mail:xuanliu1128@163.com。
作者简介:
文建东 (1973—),男,甘肃渭源人,硕士,高级工程师,主要从事煤矿安全开采研究及管理工作。E-mail:gsdst-wjd@sohu.com。

Gas control technology by static pressure water injection in borehole of Weijiadi coal mine

WEN Jiandong¹(), LIU Xuan²^,^**(), LI Zuoquan³, MIAO Zaiquan¹, WANG Beibei¹

¹ Weijiadi Coal Mine Branch, Gansu Jingmei Energy Co., Ltd., Baiyin Gansu 730913, China
² College of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China
³ Gansu Jingmei Energy Co., Ltd., Baiyin Gansu 730913, China

Received:2023-07-12 Revised:2023-09-29 Published:2023-12-30

摘要/Abstract

摘要：

为降低回采工作面开采期间瓦斯和粉尘浓度,以魏家地煤矿东一采区东1100回采工作面1号煤层为研究对象,开展煤层注水治理瓦斯及降尘试验;采用静压注水的方式对该工作面煤层注水,计算得到单孔注水量为6.9 m³,注水时间为1.7 h,注水位置设置在工作面前方16 m左右处;测定距离回采工作面注水钻孔不同位置煤样的水分变化,得出注水孔渗透半径约为10 m。结果表明:煤层注水能够降低回风流中的平均瓦斯体积分数,并能够控制煤层钻屑瓦斯解吸指标和最大钻屑量,保证上隅角瓦斯体积分数的合理变化。

关键词: 煤层注水, 钻孔, 治理瓦斯, 回采工作面, 降尘, 瓦斯体积分数

Abstract:

In order to reduce the concentration of gas and dust during the mining of the mining face, the 1st coal seam of the east 1100 mining face in the east 1 mining area of the Weijiadi coal mine was taken as the research object, and the gas and dust control test of coal seam by water injection was carried out. Static pressure water injection was adopted to inject water into the coal seam of the mining face, and the single-hole water injection volume was calculated to be 6.9 m³. The water injection time was 1.7 h, and the water injection position was set at about 16 m in front of the mining face. By measuring the moisture change of coal samples at different positions from the water injection borehole in the mining face, it was concluded that the infiltration radius of the water injection hole was about 10 m. The results show that water injection in the coal seam can not only reduce the average gas volume fraction in the return air flow but also control the gas desorption index and the maximum amount of drilling cuttings in the coal seam, and it can ensure a reasonable change of the gas volume fraction in the upper corner.

Key words: water injection in coal seam, borehole, gas control, mining face, dust fall, gas volume fraction

中图分类号:

X936

文建东, 刘烜, 李作泉, 苗在全, 王贝贝. 魏家地煤矿钻孔静压注水治理瓦斯技术[J]. 中国安全科学学报, 2023, 33(S2): 60-64.

WEN Jiandong, LIU Xuan, LI Zuoquan, MIAO Zaiquan, WANG Beibei. Gas control technology by static pressure water injection in borehole of Weijiadi coal mine[J]. China Safety Science Journal, 2023, 33(S2): 60-64.

图/表 5

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注水状态	日期	时间	瓦斯探头检测平均体积分数/%
未注水	2023-03-08	0:00—8:00	0.255
	2023-03-09	16:00—00:00	0.249
	2023-03-10	8:00—16:00	0.232
	2023-03-11	8:00—16:00	0.255
	2023-03-12	16:00—00:00	0.257
注水	2023-03-09	8:00—16:00	0.161
	2023-03-10	16:00—00:00	0.178
	2023-03-11	0:00—8:00	0.173
	2023-03-12	0:00—8:00	0.161
	2023-03-13	8:00—16:00	0.172

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魏家地煤矿钻孔静压注水治理瓦斯技术

Gas control technology by static pressure water injection in borehole of Weijiadi coal mine

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