瓦斯抽采钻孔喷涂式封孔技术

孔维一; 赵和平; 刘泉霖; 周鑫

doi:10.13272/j.issn.1671-251x.2021050022

瓦斯抽采钻孔喷涂式封孔技术

doi: 10.13272/j.issn.1671-251x.2021050022

1.
1. 华晋焦煤有限责任公司, 山西吕梁 033300;
2.
2. 中国矿业大学安全工程学院, 江苏徐州 221116

基金项目:

国家自然科学基金项目(51774280)。

详细信息

作者简介:
孔维一(1982-)，男，辽宁朝阳人，高级工程师，主要从事采矿与通风安全等方面的工作，E-mail：ok12ko@163.com。

中图分类号: TD712
计量
- 文章访问数: 179
- HTML全文浏览量: 16
- PDF下载量: 16
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-11
- 修回日期: 2021-12-07
- 刊出日期: 2021-12-20

Spray sealing technology for gas extraction drilling

1.
Huajin Coking Coal Co., Ltd., Lvliang 033300, China;
2.
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China

摘要

摘要: 瓦斯抽采钻孔封孔质量是影响瓦斯抽采及消突效果的关键因素。针对当前被动式封孔质量差、钻孔抽采瓦斯浓度低，主动式封孔过程繁琐等问题，提出了一种瓦斯抽采钻孔喷涂式封孔技术。钻孔施工完成后，将气动深孔离心喷杯式高转速喷头送入钻孔预设位置，同时启动封孔材料预热系统，待喷涂式封孔材料温度稳定在70～80 ℃时，打开气动式吸料泵，将封孔材料吸入并通过喷头混合喷出，使其固化于钻孔内壁；通过四象限位滑道结构系统引导喷头自孔底向孔口移动，完成喷涂式封孔作业；在钻孔口用聚氨酯发泡材料固定2.0～3.0 m的PVC堵头，而后连接抽采系统即可。现场应用效果表明：新型喷涂式封孔材料具有液态速凝、密封性好、黏结性强、阻燃、高韧性、高强度等优点，可在瓦斯抽放钻孔内快速反应、固化，并生成高强度、高韧性的阻燃密封薄膜；利用喷涂式封孔工艺及装置能实现煤层钻孔自动化密封；与聚氨酯封孔技术相比，采用喷涂式封孔技术后瓦斯抽采体积分数提高了19%，单孔封孔成本节约了53%，单孔封孔时间节省了50%。
- 瓦斯抽采 /
- 钻孔密封 /
- 喷涂式封孔 /
- 非膨胀型封孔材料 /
- 自动化封孔
Abstract: The sealing quality of extraction drilling is the key factor affecting gas extraction and outburst elimination. In order to solve the problems of poor quality of passive hole sealing, low gas concentration in drilling and extraction, and cumbersome process of active hole sealing, a spray sealing technology for gas extraction drilling is proposed. After the drilling construction is finished, a pneumatic deep-hole centrifugal spray cup type high-rotation speed spray nozzle is sent to the preset position of the drilling hole, and a hole sealing material preheating system is started at the same time. When the temperature of the spray type hole sealing material is stabilized at 70-80℃, a pneumatic suction pump is started to suck the sealing material, and the sealing material is mixed and sprayed out through the spray nozzle and solidified on the inner wall of the drilling hole. The four-quadrant slide structure system guides the nozzle to move from the bottom of the hole to the mouth of the hole to complete the spray-type sealing operation. Finally, the PVC plug of 2.0-3.0 m is fixed with the polyurethane foam material at the drilling hole, and then the extraction system is connected. The field application results show that the new spray sealing material has the advantages of liquid quick setting, good sealing performance, strong adhesion, flame retardant, high toughness and high strength, etc. It can react and solidify quickly in the gas extraction hole, and form a flame retardant sealing film with high strength and toughness. The use of spray sealing technology and equipment can realize automatic sealing of coal seam drilling. Compared with polyurethane sealing technology, the volume fraction of gas extraction after applying spraying-type sealing technology is increased by 19%, the cost of single-hole sealing is saved by 53%, and the sealing time of single-hole is saved by 50%.
- gas extraction /
- drilling and sealing /
- spray sealing /
- non-expandable sealing material /
- automatic sealing

HTML全文

参考文献(17)

[1]	国家能源局.煤层气(煤矿瓦斯)开发利用"十三五"规划[EB/OL].[2016-12-06].http://www.china-nengyuan.com/news/101872.html. National Energy Administration.The 13 th five-year plan for development and utilization of coalbed methane (coal gas)[EB/OL].[2016-12-06].http://www.china-nengyuan.com/news/101872.html.
[2]	李忠辉,王恩元,郑安琪,等.煤层瓦斯抽采钻孔变形破坏测试技术及其应用研究[J]. 煤炭科学技术,2020,48(10):37-44. LI Zhonghui,WANG Enyuan,ZHENG Anqi,et al. Research on testing technology of deformation and failure of boreholes in coal seam gas drainage and its application[J].Coal Science and Technology,2020,48(10):37-44.
[3]	袁亮.我国深部煤与瓦斯共采战略思考[J]. 煤炭学报,2016,41(1):1-6. YUAN Liang.Strategic thinking of simultaneous exploitation of coal and gas in deep mining[J].Journal of China Coal Society,2016,41(1):1-6.
[4]	周福宝,孙玉宁,李海鉴,等.煤层瓦斯抽采钻孔密封理论模型与工程技术研究[J].中国矿业大学学报,2016,45(3):433-439. ZHOU Fubao,SUN Yuning,LI Haijian,et al.Research on the theoretical model and engineering technology of the coal seam gas drainage hole sealing[J].Journal of China University of Mining and Technology,2016,45(3):433-439.
[5]	张超,杨朴超,李树刚,等.瓦斯抽采钻孔密封段防塌支护材料试验研究及现场应用[J].采矿与安全工程学报,2021,38(1):199-205. ZHANG Chao,YANG Puchao,LI Shugang,et al. Experimental research and field application of anti-sloughing support material in gas extraction borehole sealing section[J].Journal of Mining & Safety Engineering,2021,38(1):199-205.
[6]	翟成,向贤伟,余旭,等.瓦斯抽采钻孔柔性膏体封孔材料封孔性能研究[J].中国矿业大学学报,2013,42(6):982-988. ZHAI Cheng,XIANG Xianwei,YU Xu,et al.Sealing performance of flexible gel sealing material of gas drainage borehole[J].Journal of China University of Mining and Technology,2013,42(6):982-988.
[7]	张建华,李振兴.深部低透煤层瓦斯抽采钻孔封孔方式研究[J].能源与环保,2019,41(4):80-83. ZHANG Jianhua,LI Zhenxing.Study on sealing way of gas drainage borehole in deep low-permeability coal seam[J].China Energy and Environmental Protection,2019,41(4):80-83.
[8]	韩军军.煤矿瓦斯抽采钻孔主要封孔方式研究[J].能源与节能,2020(7):158-159. HAN Junjun.Study on the main sealing methods of gas drainage boreholes in coal mines[J].Energy and Energy Conservation,2020(7):158-159.
[9]	张宏图,李阳,姚邦华,等.瓦斯抽采钻孔封孔水泥砂浆黏度时变性扩散模型[J].煤炭科学技术,2020,48(10):52-59. ZHANG Hongtu,LI Yang,YAO Banghua,et al.Time-dependent viscosity diffusion model of cement mortar grouting for gas drainage borehole sealing[J].Coal Science and Technology,2020,48(10):52-59.
[10]	王鹏.提高围岩破碎区穿层钻孔抽采效果新技术与应用[J].煤炭技术,2019,38(2):85-88. WANG Peng.New technology and application of improving extraction effect of crossing hole in surrounding rock broken zone[J].Coal Technology, 2019,38(2):85-88.
[11]	周世勇."两堵一注"封孔装置在瓦斯抽采中的应用[J]. 能源技术与管理,2018,43(2):29-30. ZHOU Shiyong.Application of "two sealing and one injection" sealing device in gas drainage[J].Energy Technology and Management,2018,43(2):29-30.
[12]	徐宁武,孙炳兴."两堵一注"封孔工艺在银北矿区的应用研究[J].能源与环保,2019,41(8):11-14. XU Ningwu,SUN Bingxing.Application research of "two sealing and one injection" hole sealing technology in Yinbei Mining Area[J].China Energy and Environmental Protection,2019,41(8):11-14.
[13]	王世超,刘永茜.预制粉料充填封孔方法研究及应用[J]. 煤炭科学技术,2017,45(8):238-242. WANG Shichao,LIU Yongqian.Research and application of sealing method of prefabricated powder filling in drill hole[J].Coal Science and Technology, 2017,45(8):238-242.
[14]	周福宝,李金海,昃玺,等.煤层瓦斯抽放钻孔的二次封孔方法研究[J].中国矿业大学学报,2009,38(6):764-768. ZHOU Fubao,LI Jinhai,ZE Xi,et al.A Study of the second hole sealing method to improve gas drainage in coal seams[J].Journal of China University of Mining and Technology,2009,38(6):764-768.
[15]	刘南南,张春华,郝晋伟.煤层钻孔自适应动态密封技术及系统研究[J].资源开发与市场,2016,32(2):208-212. LIU Nannan,ZHANG Chunhua,HAO Jinwei.Research of adaptive dynamic sealing mechanism and system on borehole in coal seam[J].Resource Development & Market,2016,32(2):208-212.
[16]	翟成,仲超,徐吉钊,等.高瓦斯煤层瓦斯预抽钻孔动态封孔技术[J].煤矿安全,2015,46(3):222-225. ZHAI Cheng,ZHONG Chao,XU Jizhao,et al.Dynamic sealing technology for gas pre-drainage drilling holes in gassy coal seam[J].Safety in Coal Mines,2015,46(3):222-225.
[17]	张超,林柏泉,周延,等.本煤层近水平瓦斯抽采钻孔"强弱强"带压封孔技术研究[J].采矿与安全工程学报,2013,30(6):935-939. ZHANG Chao,LIN Baiquan,ZHOU Yan,et al. Strong-weak-strong borehole pressurized sealing technology for horizontal gas drainage borehole in mining seam[J].Journal of Mining & Safety Engineering,2013,30(6):935-939.