Control and utilization of coal mine gas to achieve carbon peaking and carbon neutrality

doi:10.3969/j.issn.1674-1951.2021.12.008

Abstract

Abstract:

In view of the threats to the personal safety, increasing in coal-mining cost and harm to our environment caused by coal mine gas,redesigning the controlling and utilization measurements for coal mine gas on the path to realize carbon peaking and carbon neutrality can boost the production safely and efficiently and advance the transformation of coal industry.Base on literature research and cases study,the current measurements were found to include pre-drainage in planning areas,mechanical ventilation and gas drainage for the working face in production areas and mechanical extraction in the goaf.There are no general standard for the evaluation of the control effects or a unified development plan for coal mine gas.Coal mining enterprises lack the motivation for low-carbon control of coal mine gas,since their understanding on the comprehensive benefits brought by enhancing coal mine gas controlling is insufficient and their treatment technologies are underdeveloped.This situation is inconsistent with the requirements of the national strategic goals of carbon peaking and carbon neutrality.It is suggested that the coal mining enterprises should deploy a coal mine gas control and utilization strategy which conforms to the goals of carbon peaking and carbon neutrality,construct a digital information platform for coal mine gas control and utilization,implement technological innovation and talent introduction strategies, and design the purification and utilization process for the extracted methane in advanced,so as to formulate a new methane control mode including carbon emission reduction from the source,process control,divisional implement,terminal control and market development.

Key words: carbon peaking and carbon neutrality, coal mine, methane controlling, evaluation standard, carbon emission reduction

CLC Number:

TK01⁺9

HU Xiaolan, SONG Wei, PENG Chuansheng, LI Bo, JIANG Lihong, XIAO Zhaohui, HONG Keyan. Control and utilization of coal mine gas to achieve carbon peaking and carbon neutrality[J]. Huadian Technology, 2021, 43(12): 52-59.

Figures/Tables 2

Tab.1

Tab.2

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类型	煤矿名称	区段	采用措施	实施效果
中高瓦斯矿	马兰煤矿12504工作面	生产区	利用多种布孔和抽采方式实现立体抽采	瓦斯体积分数由0.80%下降到0.68%,整体降幅22.7%
	徐州夹河煤矿7446综采面	隅角	采用隅角埋设专用抽采管路达到回风隅角和采空区瓦斯抽采	回风流瓦斯体积分数由0.8%~1.2%下降到0.5%~0.7%;上隅角瓦斯体积分数由2.0%~5.0%下降到0.6%~0.8%,日产瓦斯0.15万t上升到0.26万t,瓦斯体积分数平均降幅39.6%
	霍州煤电集团李雅庄煤矿2-616工作面	工作面	对煤层、裂隙带和上隅角实现全面抽采	上隅角瓦斯平均体积分数0.6%下降到0.4%,降幅33.3%
	徐州夹河煤矿2441综采面	上隅角	重点对工作面瓦斯积聚情况采取了各种稀释措施	瓦斯涌出量由3.5~4.5 m³/min下降到2.5 m³/min;瓦斯体积分数由2.0%~3.0%下降到0.6%~0.7%,降幅73.3%
中低瓦斯矿	山西三元煤业2305综放面	生产区	采空区埋管抽采、顶板定向钻孔抽采	千米定向钻孔抽采瓦斯1个月后,瓦斯体积分数由0.85%下降到0.48%,降幅43.5%
	冀中能源股份公司葛泉矿1623工作面	隅角	工作面通风稀释、隅角负压抽采	运输巷瓦斯体积分数≤0.32%;隅角瓦斯体积分数≤0.42%,风筒内瓦斯体积分数≤2.30%;回风巷瓦斯体积分数≤0.26%
	正利煤矿14-1102孤岛工作面	工作面	采空区释放+插管抽采结合,工作面钻孔抽采	瓦斯涌出量由1 300 m³/min上升到1 500 m³/min,瓦斯体积分数≤0.25%

类别	低瓦斯煤矿		中高瓦斯煤矿
类别	浅层工作面	深层工作面	中高瓦斯煤矿
规划区	基本不处理	地面预抽采	地面预抽采
生产区工作面	机械通风	机械通风	一面多巷增加通风空间
	矿井抽采	井下抽采	井上和井下同时抽采
	堵漏、截堵	堵漏、截堵	抽采管路数量、抽风机数量增加
采空区	抽采	抽采	隅角抽采