瓦斯抽采钻孔封孔段注浆密封全过程分析
Analysis of the whole process of grouting sealing for gas extraction drilling hole sealing section
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摘要: 为了分析瓦斯抽采钻孔封孔段注浆密封过程中封孔材料对钻孔密封性的影响，采集不同矿区水泥基封孔材料，在实验室测试其黏度、膨胀率、析水率、凝结时间及凝固后的强度参数指标，从前期封孔材料注浆到后期固结密封全过程分析各指标对钻孔密封的影响。结果表明：封孔材料前期注浆时浆液黏度是衡量其流动性的关键指标，浆液黏度上升越快，流动性降低越快，封堵钻孔围岩裂隙的难度越大；中期注浆完成后，不同材料表现出膨胀性和析水性，材料的膨胀特性可为钻孔围岩提供支护作用，提高钻孔封孔段异质结构的稳定性和完整性，材料的析水性会造成钻孔壁面与封孔材料分离，漏气通道增加，密封性降低；封孔材料后期凝固后的强度与煤体差异较大形成不稳定异质结构，在应力作用下，不稳定异质结构裂隙发育，密封性降低。Abstract: In order to analyze the influence of sealing material properties on borehole sealing during grouting sealing in the sealing section of gas extraction borehole, special cement-based sealing materials were collected from different mining areas, and their viscosity, expansion rate, water separation rate, setting time and strength parameters after solidification were tested in the laboratory. The influence of the above indexes on borehole sealing was analyzed from the whole process of grouting in the early stage to solidification sealing in the later stage. The results show that the viscosity of the slurry is the key index to measure the fluidity of the grouting material in the early stage of the grouting. The faster the viscosity of the slurry rises and the faster the fluidity decreases, the more difficult it is to seal the cracks in the surrounding rock of the borehole. After the completion of the grouting in the middle stage, different materials show expansibility and water tightness. The expansion characteristics of the materials can provide support for the surrounding rock of the borehole and improve the stability and integrity of the heterogeneous structure of the sealing section of the borehole. Water tightness of the materials will cause the separation of the borehole wall surface from the sealing material, increase the air leakage channel and reduce the water tightness. The strength of the sealing material after solidification at later stage is greatly different from that of the coal body, forming unstable heterogeneous structure. Under the action of stress, the fracture of the unstable heterogeneous structure develops and the tightness decreases.
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Keywords:
- gas extraction /
- cement base sealing material /
- hole tightness /
- water cement ratio /
- viscosity
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[1] 俞启香.矿井瓦斯防治[M].徐州:中国矿业大学出版社，1992. [2] 舒龙勇，王凯，齐庆新，等.煤与瓦斯突出关键结构体致灾机制[J].岩石力学与工程学报，2017，36（2）：347-356. SHU Longyong, WANG Kai, QI Qingxin, et al. Key structural body theory of coal and gas outburst[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36（2）: 347-356.
[3] 郝晋伟，舒龙勇，齐庆新，等.钻孔密封段异质结构变形损伤及影响因素分析[J].煤矿安全，2019，50（6）: 172-175. HAO Jinwei, SHU Longyong, QI Qingxin, et al. Deformation damage and influencing factors analysis of heterogeneous structure in borehole seal section[J]. Safety in Coal Mines, 2019, 50（6）: 347-356.
[4] 杨伟东，霍中刚，舒龙勇，等.钻孔密封段异质结构变形破坏特征试验研究[J].煤炭科学技术，2020，48（6）:122. YANG Weidong, HUO Zhonggang, SHU Longyong, el al. Experimental study on deformation and failure characteristics of heterostructure in borehole sealing section[J]. Coal Science and Technology, 2020, 48（6）: 122.
[5] 王振锋，周英，孙玉宁，等．新型瓦斯抽采钻孔注浆封孔方法及封堵机理[J].煤炭学报，2015，40（3） : 588. WANG Zhenfeng, ZHOU Ying, SUN Yuning, et al. Novel gas extraction borehole grouting sealing method and sealing mechanism[J]. Journal of China Coal Society, 2015, 40（3）: 588.
[6] 路阳，何小芳，吴永豪，等.煤矿井下新型水泥基注浆材料的应用研究进展[J].硅酸盐通报，2014，33（1）: 97-102. LU Yang, HE Xiaofang, WU Yonghao, et al. Research progress on application of new cement-based grouting materials in coal mine underground[J]. Bulletin of the Chinese Ceramic Society, 2014, 33（1）: 97-102.
[7] 刘超，杨铭扬，苏俊凯，等. 瓦斯抽采钻孔磁性密封浆液配合比试验研究[J].中国安全科学学报，2019，29（7）: 84-89. LIU Chao, YANG Mingyang, SU Junkai, et al. Experimental study on mix proportion of magnetic sealing slurry forgas drainage borehole[J]. China Safety Science Journal, 2019, 29（7）: 84-89.
[8] 赵耀耀，孙玉宁，王志明.铝酸盐水泥掺入量对瓦斯抽采封孔注浆材料性能影响[J].煤炭科学技术，2018， 46（4）:146-152. ZHAO Yaoyao, SUN Yuning, WANG Zhiming. Mixed volume of aluminous cement affected to grouting material performances of borehole sealing for gas drainage[J]. Coal Science and Technology, 2018, 46（4）: 146-152.
[9] 王志明，孙玉宁，宋维宾，等.瓦斯抽采二次膨胀封孔材料膨胀机理及应用研究[J].中国安全生产科学技术，2018，14（12）: 28-33. WANG Zhiming, SUN Yuning, SONG Weibin, et al. Study on expansion mechanism and application of double-expansive material for borehole sealing in gas drai-nage[J]. Journal of Safety Science and Technology, 2018, 14（12）: 28-33.
[10] 刘长武，陆士良.水泥注浆加固对工程岩体的作用与影响[J].中国矿业大学学报，2000（5）:12-16. LIU Changwu, LU Shiliang. Reinforcement effect of cement grouting on engineering rock mass[J]. Journal of China University of Mining & Technology, 2000（5）: 12-16.
[11] 吴怀国，韩德强，魏宏亮.硅酸盐改性注浆加固材料的最新研究进展和应用[J].煤炭科学技术，2015，43（S1）:29-31. WU Huaiguo, HAN Deqiang, WEI Hongliang, et al. New research progress and application of the silicate modified grouting consolidation materials[J]. Coal Science and Technology, 2015, 43（S1）: 29-31.
[12] 王志，李龙，王朝雅.含裂隙类岩石注浆加固后破坏试验研究[J].中南大学学报（自然科学版），2018，49（4）：957-963. WANG Zhi, LI Long, WANG Chaoya. Experimental study on failure of cracked rock-like material after grouting reinforcement[J]. Journal of Central South University（Science and Technology）, 2018, 49（4）: 957-963.
[13] 张林仙.利用旋转粘度计测量非牛顿流体的流变特性[J].黄石高等专科学校学报，2003（2）：5-8. ZHANG Linxian. Testing rheology behaviors of non-newtonian fluid by using rotary viscometer[J]. Journal of Huangshi Polytechnic College, 2003（2）: 5-8.
[14] 管学茂，张海波，杨政鹏，等. 高性能无机-有机复合注浆材料研究[J].煤炭学报，2020，45（3）：902-910. GUAN Xuemao, ZHANG Haibo, YANG Zhengpeng, et al. Research of high performance inorganic-organic composite grouting materials[J]. Journal of China Coal Society, 2020, 45（3）: 902-910.
[15] 左建平，裴建良，刘建锋，等.煤岩体破裂过程中声发射行为及时空演化机制[J]．岩石力学与工程学报，2011，30（8）：1564-1570. ZUO Jianping, PEI Jianliang, LIU Jianfeng, et al. Investigation on acoustic emission behavior and its time-space evolution mechanism in failure process of coal-rock combined body[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30（8）: 1564-1570.
[16] 舒龙勇，王凯，张浪，等.突出煤体受载变形破坏声发射行为演化特征[J].采矿与安全工程学报，2018，35（3）：589-597. SHU Longyong, WANG Kai, ZHANG Lang, et al. Investigation on acoustic emission behaviour evolution characteristics of outburst coal under uniaxial compression[J]. Journal of Mining and Safety Engineering, 2018, 35（3）: 589-597.
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