1. Key Laboratory of Western Mine Exploration and Hazard Prevention，Ministry of Education，Xi’an University of Science and Technology，Xi’an 710054，China; 2. School of Safety Science and Engineering，Xi’an University of Science and Technology，Xi’an 710054，China; 3. Post－doctoral Workstation，Yankuang Group，Zoucheng 237500，China; 4. Shandong Xinjulong Energy Company Limited，Heze 274918，China

为解决深井开采地温高易导致煤层自燃的难题,研究了高地温工作面煤层氧化放热特性及预控方法。采用傅里叶变换红外光谱仪和大型自然发火试验装置,分别测试了高地温对煤活性官能团和自然发火期的影响;现场观测了龙固矿井2302高地温综放工作面采空区自燃危险区域。研究结果表明:地温为42℃时,煤自然发火期相比地温为20℃时缩短25 d;高地温使煤表面活性官能团数量及中间活性产物数量增加,氧化放热性显著增强;氧化升温带范增长。针对高地温对供氧、蓄热条件及其氧化放热性的影响,提出了采用堵漏和注氮气减少煤体氧化,阻化泡沫阻化煤体,压注液态二氧化碳和注胶抑制煤温升高结合的防火方法。通过在巨野矿区的现场应用,该方法有效控制了高地温综放工作面采空区煤体自燃。

In order to solve the difficult problems of the high spontaneous combustion danger of seam caused by the high ground temperature of the coal mining in the deep depth mine，the paper had a study on the seam oxidation and thermal releasing features of the high ground temperature coal mining face and the pre－control method． Fourier transform infrared spectrometer and large spontaneous combustion experiment device were applied to test the high ground temperature affected to the active functional group and the spontaneous combustion period of the coal． A site observation was conducted on the spontaneous combustion danger area in the goaf of No． 2302 high ground temperature coal mining face in Longgu Mine． The study results showed that when the ground temperature was 42 ℃，the coal spontaneous combustion period would be reduced by 25 days than when the ground temperature was 20 ℃ ． The high ground temperature could make the coal surface active function group number and the intermediate active product value increased and the oxidation thermal releasing would be obviously increased． The oxidized temperature rising zone scope would be increased． According to the high ground temperature affected to the oxygen supply，thermal accumulation condition and the oxidation thermal releasing．The combined fire prevention method was put forward，including using leakage sealing and nitrogen injection to reduce the oxidation of the coal mass，using resist foam to resist coal，using liquid carbon dioxide pressurized injection and glue injection to inhibition coal temperature rising． With the site application to Juye Mining Area，the method could affectively control the coal spontaneous combustion in the goaf and high ground temperature coal mining face．

国家自然科学基金资助项目(51574193,51204135)；陕西省工业科技攻关资助项目(2016GY-191)；