Coal Geology & Exploration


Coal and gas outburst in coal mines is a serious disaster in China. Although the disaster has been reduced significantly over the past 10 years, vicious accidents still occure, causing serious losses to the lives of miners and the safety of coal mines. The current applied technologies for outburst prevention and control include hydraulic fracturing, hydraulic slitting, hydraulic flushing, deep hole blasting, intensive drilling, etc., which have solved the outburst problem and safe excavation in some degrees. Nevertheless, the above-mentioned technologies could not solve the problems of safety excavation in the high gas content and low permeability outburst coal seams. Therefore, preventing outburst technology is still a major difficulity in China’s coal mines. The carbon dioxide gas fracturing and outburst elimination technology has been developed in Xinyuan Coal Mine of Shouyang County in Shanxi recently and has achieved good results. This paper introduces its technical characteristics, field test method and the effect of anti-burst excavation based on working face 31002 of Xinyuan Coal Mine. The No.3 coal seam of Shanxi Formation mined in Xinyuan Coal Mine is a low-permeability and outburst seam. In the early stage, intensive borehole drilling and gas pre-drainage were used to prevent gas outburst, which took a long time to reach the gas drainage standard, with a low excavation speed. Efficient gas extraction, prevention of coal and gas outbursts, and ensuring the safe and rapid excavation of coal roads are major technical problems for the safe and efficient production of Xinyuan Coal Mine. The key points of the CO2 gas fracturing technology are described as follows. Implementing 2 holes for CO2 gas-phase fracturing in front of the tunnel face and drilling additional 9 holes for gas drainage covering a safety range of 15 m in each side of the roadway. All the 11 boreholes were connected to the drainage network for 3-5 days, and the excavation resumed after the outburst prevention parameter K1 value reached the standard. The test data show that show that the CO2 gas fracturing significantly enhanced gas drainage efficiency and the coal cannon and other dynamic phenomena are reduced. With K1value reduced, the gas concentration in the roadway can be reduced and homogenized during coal cutting, ensuring a continuous safe driving. It is concluded that CO2 gas-phase fracturing can achieve high-efficiency gas extraction and prevention of outbursts, and it can be applied in coal mines with similar gas geological conditions across the country.


coal mine gas control, outburst coal seam, CO2 gas-phase fracturing, rapid excavation, Xinyuan Coal Mine




[1] 程远平,付建华,俞启香. 中国煤矿瓦斯抽采技术的发展[J]. 采矿与安全工程学报,2009,26(2):127-139. CHENG Yuanping,FU Jianhua,YU Qixiang. Development of gas extraction technology in coal mines of China[J]. Journal of Mining & Safety Engineering,2009,26(2):127-139.

[2] 于不凡,王佑安. 煤矿瓦斯灾害防治及利用技术手册(修订版)[M]. 北京:煤炭工业出版社,2005. YU Bufan,WANG You'an. Technical manual of coal mine gas disaster prevention and utilization(revised edition)[M]. Beijing:China Coal Industry Publishing House,2005.

[3] 胡千庭,赵旭生. 中国煤与瓦斯突出事故现状及其预防的对策建议[J]. 矿业安全与环保,2012,39(5):1-6. HU Qianting,ZHAO Xusheng. Present situation of coal and gas outburst accidents in China's coal mines and countermeasures and suggestions for their prevention[J]. Mining Safety and Environmental Protection,2012,39(5):1-6.

[4] 孙炳兴,王兆丰,伍厚荣. 水力压裂增透技术在瓦斯抽采中的应用[J]. 煤炭科学技术,2010,38(11):78-80. SUN Bingxing,WANG Zhaofeng,WU Hourong. Hydraulic pressurized cracking and permeability improvement technology applied to gas drainage[J]. Coal Science and Technology,2010,38(11):78-80.

[5] 宋维源,王忠峰,唐巨鹏. 水力割缝增透抽采煤层瓦斯原理及应用[J]. 中国安全科学学报,2011,21(4):78-82. SONG Weiyuan,WANG Zhongfeng,TANG Jupeng. Principle of gas extraction by increasing permeability of coal seam with hydraulic cutting and its application[J]. China Safety Science Journal,2011,21(4):78-82.

[6] 刘明举,孔留安,郝富昌,等. 水力冲孔技术在严重突出煤层中的应用[J]. 煤炭学报,2005,30(4):451-454. LIU Mingju,KONG Liu'an,HAO Fuchang,et al. Application of hydraulic flushing technology in severe outburst coal[J]. Journal of China Coal Society,2005,30(4):451-454.

[7] 马小涛,李智勇,屠洪盛,等. 高瓦斯低透气性煤层深孔爆破增透技术[J]. 煤矿开采,2010,15(1):92-93. MA Xiaotao,LI Zhiyong,TU Hongsheng,et al. Technology of deep-hole blasting for magnifying permeability in coal seam with high methane-content and low permeability[J]. Coal Mining Technology,2010,15(1):92-93.

[8] 林柏泉,孟凡伟,张海宾. 基于区域瓦斯治理的钻割抽一体化技术及应用[J]. 煤炭学报,2011,36(1):75-79. LIN Baiquan,MENG Fanwei,ZHANG Haibin. Regional gas control based on drilling-slotting-extracting integration technology[J]. Journal of China Coal Society,2011,36(1):75-79.

[9] 杨宏民,张铁岗,王兆丰,等. 煤层注氮驱替甲烷促排瓦斯的试验研究[J]. 煤炭学报,2010,35(5):792-796. YANG Hongmin,ZHANG Tiegang,WANG Zhaofeng,et al. Experimental study on technology of accelerating methane release by nitrogen injection in coalbed[J]. Journal of China Coal Society,2010,35(5):792-796.

[10] 张广云. 区域密集钻孔抽采技术在高瓦斯矿井煤巷掘进中的应用[J]. 煤矿开采,2011,16(6):100-101. ZHANG Guangyun. Application of methane drainage technology of regional concentrated boreholes in driving coal roadway in mine with high methane content[J]. Coal Mining Technology,2011,16(6):100-101.

[11] 张军胜. 高河煤矿气相压裂强化增透瓦斯快速抽采技术研究[D]. 焦作:河南理工大学,2014. ZHANG Junsheng. The rapid gas drainage technology reaearch on increase coal gas permeability by vapor hpase fracturing in Gaohe Coal Mine[D]. Jiaozuo:Henan Polytechnic University,2014.

[12] 周西华,门金龙,宋东平,等. 煤层液态CO2爆破增透促抽瓦斯技术研究[J]. 中国安全科学学报,2015,25(2):60-65. ZHOU Xihua,MEN Jinlong,SONG Dongping,et al. Research on increasing coal seam permeability and promoting gas drainage with liquid CO2 blasting[J]. China Safety Science Journal,2015,25(2):60-65.

[13] 范延昌. 新元煤矿煤巷掘进气相压裂防突技术研究[D]. 焦作:河南理工大学,2017. FAN Yanchang. The research on gas fracturing technology for outburst prevention in the coal roadway tunneling in Xinyuan Mine[D]. Jiaozuo:Henan Polytechnic University,2017.

[14] 朱拴成,周海丰,李浩荡. 二氧化碳炮处理综采工作面巷道三角区悬顶[J]. 煤矿安全,2013,44(8):144-146. ZHU Shuancheng,ZHOU Haifeng,LI Haodang. The application of carbon dioxide gun in processing hanging arch at triangle area of fully mechanized mining face roadway[J]. Safety in Coal Mines,2013,44(8):144-146.

[15] 魏刚,夏洪满,姜凤岗,等. 液态CO2爆破器落煤试验研究[J]. 煤矿开采,2009,14(1):22-24. WEI Gang,XIA Hongman,JIANG Fenggang,et al. Test research on coal drop with liquid CO2 blaster[J]. Coal Mining Technology,2009,14(1):22-24.

[16] SONG Xuehang,GUO Yintong,ZHANG Jin,et al. Fracturing with carbon dioxide:From microscopic mechanism to reservoir application[J]. Joule,2019,3(8):1913-1926.

[17] 曹运兴,田林,范延昌,等. 低渗煤层CO2气相压裂裂隙圈形态研究[J]. 煤炭科学技术,2018,46(6):46-51. CAO Yunxing,TIAN Lin,FAN Yanchang,et al. Study on cracking ring form of carbon dioxide gas phase fracturing in low permeability coal seam[J]. Coal Science and Technology,2018,46(6):46-51.

[18] 翟红,曹运兴,傅国廷,等. 低渗煤层气相压裂瓦斯综合治理关键技术研究与应用[R]. 焦作:河南理工大学,2014:100-189. ZHAI Hong,CAO Yunxing,FU Guoting,et al. Research and application of CO2 fracturing for methane control in low permeability coal seam[R]. Jiaozuo:Henan Polytechnic University,2014:100-189.

[19] 曹运兴,张军胜,田林,等. 低渗煤层定向多簇气相压裂瓦斯治理技术研究与实践[J]. 煤炭学报,2017,42(10):2631-2641. CAO Yunxing,ZHANG Junsheng,TIAN Lin,et al. Research and application of CO2 gas fracturing for gas control in low permeability coal seams[J]. Journal of China Coal Society,2017,42(10):2631-2641.

[20] CAO Yunxing,ZHANG Junsheng,ZHAI Hong,et al. CO2 gas fracturing:A novel reservoir stimulation technology in low permeability gassy coal seams[J]. Fuel,2017,203(Sup.1):197-207.

[21] 苏恒,曹运兴,陈莲芳. 气相压裂增透技术在煤巷掘进工作面中的应用[J]. 煤田地质与勘探,2016,44(5):49-52. SU Heng,CAO Yunxing,CHEN Lianfang. Application of gas phase permeability-enhancing fracturing techniques in driving face of coal roadway[J]. Coal Geology & Exploration,2016,44(5):49-52.

[22] 国家安全生产监督管理总局. 煤矿安全规程[M]. 北京:煤炭工业出版社,2011. State Administration of Work Safety. Coal mine safety regulations[M]. Beijing:China Coal Industry Publishing House,2011.

[23] 国家安全生产监督管理总局,国家煤矿安全监察局. 防治煤与瓦斯突出规定[M]. 北京:煤炭工业出版社,2009. State Administration of Work Safety,National Coal Mine Safety Supervision Bureau. Regulations on prevention of coal and gas outburst[M]. Beijing:China Coal Industry Publishing House,2009.



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