中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (8): 44-50.doi: 10.16265/j.cnki.issn1003-3033.2020.08.007

• 安全工程技术 • 上一篇    下一篇

终采线切顶留巷煤自燃综合防治技术

杜海刚1,2 副教授, 翟文杰3 高级工程师, 谢军2 教授, 冯姗1 副教授   

  1. 1 六盘水师范学院 矿业与土木工程学院,贵州 六盘水 553004;
    2 山东科技大学 能源与矿业工程学院,山东 青岛 266590;
    3 贵州五轮山煤业有限公司 贵州 毕节 551700
  • 收稿日期:2020-05-16 修回日期:2020-07-05 出版日期:2020-08-28 发布日期:2021-07-15
  • 作者简介:杜海刚 (1985—),男,土家族,贵州铜仁人,博士研究生,副教授,主要从事瓦斯灾害防治、煤自燃灾害防治等方面研究。E-mail:haigangdu@126.com。
  • 基金资助:
    国家自然科学基金资助(51674157);贵州省科技厅联合基金资助(黔科合LH字[2015]7613号);贵州省教育厅青年项目(黔教合KY字[2017] 264号);贵州省科技厅重点项目(黔科合基础[2018]1415号)。

Comprehensive prevention and control technology of coal spontaneous combustion on roof cutting and retained roadway in stopping line

DU Haigang1,2, ZHAI Wenjie3, XIE Jun2, FENG Shan1   

  1. 1 College of Mining and Civil Engineering, Liupanshui Normal University, Liupanshui Guizhou 553004, China;
    2 College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao Shandong 266590, China ;
    3 Guizhou Wulunshan Coal Industry Co., Ltd., Bijie Guizhou 551700, China
  • Received:2020-05-16 Revised:2020-07-05 Online:2020-08-28 Published:2021-07-15

摘要: 为解决终采线切顶卸压留巷CO持续涌出问题,利用示踪气体(SF6)连续释放法分析漏风特征,运用风帘和堆垛封堵措施、CO2防治技术、新型粉煤灰复合胶体技术防治可能高温点的氧化遗煤。结果表明:终采线的漏风特征为两源两汇,总漏风量为181 m3/min;风帘和堆垛对上下隅角及液压支架后方封堵后,总漏风量为135 m3/min;CO2能够在短时间内将漏风路径的负压环境改为正压环境,进行快速惰化降温,但不能长时间滞留,其有效封存时间为10天左右;新型粉煤灰复合胶体中硅酸钠10%、碳酸氢钠4%、聚丙烯酰胺0.5%、水灰比1∶2,现场应用后平均漏风量为9 m3/min,无CO涌出。

关键词: 终采线, 切顶留巷, 煤自燃, 粉煤灰, 复合胶体

Abstract: In order to solve problem of continuous CO emission from roof-cutting and pressure-relieving roadway in stopping line, air leakage characteristics were analyzed by using continuous release method of tracer gas (SF6). Then, measures of air curtain and stack plugging, CO2 prevention technology and new type fly ash compound colloid technology were applied to control left coal oxidizing of possible high temperature points. The results show that air leakage of stopping line features two sources and two sinks with a total air leakage of 181 m3/min which will be 135 m3/min after sealing upper and lower corners and rear of hydraulic support with air curtain and stack. CO2 could change negative pressure state of the air leakage path to a positive one and would be inert and reduce temperature in a short time, but it could not be retained for a long time with an effective storage time of about 10 days. At last, the new fly ash composite colloid contains 10% of sodium silicate, 4% of Sodium bicarbonate, 0.5% of polyacrylamide and water cement ratio at 1∶2, and with field application of colloid technology, average air leakage would be 9 m3/min with no CO emission.

Key words: stopping line, roof-cutting and pressure-relieving roadway, coal spontaneous combustion, fly-ash, composite colloid

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