煤矿井下防治水定向钻孔定点注浆封隔器设计与应用

doi:10.11799/ce202412001

摘要/Abstract

摘要： 针对煤矿井下防治水定向钻孔采用普通孔口法兰注浆工艺存在浆液易沉淀、注浆量小、全孔段被注实，造成注浆效果不理想和大量重复进尺的问题，在煤矿注浆用止浆塞分段注浆和煤矿井下水力分段压力技术的基础上，结合井下施工特点，设计了一种MX-100型裸眼封隔器，具有单通道双流向结构、长胶筒设计和易脱开保护套设计等特点。通过室内试验验证了封隔器的工作性能，同时对煤矿井下封隔器定点注浆技术进行了研究，形成了一套封隔器注浆工艺方法。该技术在新安矿15150工作面下部底板巷底板灰岩定向钻孔1号孔施工中进行了试验，出水点孔深为391 m、出水量为44 m3/h，封隔器设置在孔深280 m处并成功进行了坐封，坐封压力为10 MPa，最终注浆压力达到设计的8 MPa，总注浆干料达514 t。相较于同类型定向钻孔采用孔口注浆工艺注浆时，明显提高了注浆量，同时也减少了280 m定向钻孔的重复进尺。试验结果表明，该封隔器能够在裸眼钻孔中坐封牢固，能够实现近水平定向钻孔孔内分段定点注浆，同时也减少了不必要的重复进尺，为煤矿井下防治水工程实现降本增效提供了更好的技术支撑。

关键词: 煤矿井下, 防治水, 定向钻孔, 定点注浆, 封隔器

Abstract: In view of the problems existing in the ordinary orifice flange grouting technology used in the directional drilling construction of water prevention and control in underground coal mines, such as slurry easy to precipitate, small grouting amount, and full hole section being filled, resulting in unsatisfactory grouting effect and a large number of repeated footage. On the basis of coal mine grouting stopper segmented grouting and coal mine underground hydraulic segmented pressure technology. Combined with un-derground construction characteristics, designed an MX-100 bare-eye packer, it has the structural features of single channel double flow structure and long rubber drum design and easy to detangle protective sleeve design. The Working performance of packer was verified by indoor performance test, and studying the technology of fixed point grouting for underground coal mine，it have formed a set of packer grouting technology. The technology has been applied in the construction of no.1 directional drilling hole of floor limestone in the directional drilling field of the bottom floor roadway of 15150 working face in Xin'an Mine, the outlet point is located in the hole depth of 391 m and the specific yield is 44 m3/h, the packer was set at a hole depth of 280 m successfully, the setting pressure is 10 MPa, the grouting pressure reached the designed 8 MPa finally and the total grouting dry material was 514 t. The amount of grouting is obviously increased compared with similar directional drilling using hole grouting technology. At the same time, 280 m directional drilling repeat footage was reduced. The experimental results show that the packer can be set firmly in open hole drilling，the technology of packer fixed point grouting can realize near horizontal directional drilling hole segment fixed point grouting，it also reduced the unnecessary repetitive footage. It provides a better technical support for the realization of underground water prevention and control project in coal mine.

中图分类号:

TD745

管强盛. 煤矿井下防治水定向钻孔定点注浆封隔器设计与应用[J]. 煤炭工程, 2024, 56(12): 1-6.

参考文献

[1]靳德武.我国煤矿水害防治技术新进展及其方法论思考[J].煤炭科学技术,2017,45(05)：141-147.
JIN Dewu．New development of water disaster prevention and control technology in China coal mine and consideration on methodolo-gy.Coal[J].Coal Science and Technology，2017，45(5)：141－147.
[2]孙文洁, 韩权, 杨恒, 等. 2000—2015年我国煤矿水害事故特征分析[J].煤炭工程,2017,49(05):95-98.
SUN Wenjie, HAN Quan, YANG Heng，et.Analysis on water inrush accidents in China’s coal mines 2000-2015[J].COAL ENGINEERING, 2017, 49(05):95-98.
[3]靳德武, 乔伟, 李鹏, 等. 煤矿防治水智能化技术与装备研究现状及展望[J].煤炭科学技术,2019,47(03):10-17.
JIN Dewu，QIAO Wei，LI Peng，et al.Research status and prospects on intelligent technology and equipment for mine water hazard pre-vention and control[J]，Coal Science and Technology,2019,47(03):10-17.
[4]范立民, 孙魁, 李成, 等. 榆神矿区煤矿防治水的几点思考[J].煤田地质与勘探,2021,49(01):182-188.
FAN Limin, SUN Kui, LI Cheng, et al. Thoughts on mine water control and treatment in Yushen mining area[J]. Coal Geology & Exploration, 2021, 49(1): 182–188.
[5]张耀辉, 熊祖强, 李西凡, 等. 复杂水文地质条件下矿井水害综合防治技术研究[J].煤炭科学技术, 2021, 49(03): 167-174.
ZHANG Yaohui, XIONG zhuqiang, LI Xifan, et al. Study on technology of mine water disater prevention and control in underground mine under complex hydrogeological conditions[J]. Coal Science and Technology, 2021, 49(03): 167-174.
[6]张二蒙, 沈星宇, 苗葳, 等.奥灰顶部含水层注浆改造浆液扩散主要影响因素试验研究[J].煤炭学报, 2021, 46(11): 3536-3549.
ZHANG Ermeng, SHENG Xingyu, MIAO Wei, et al.Experimental study on the influence of grounting diffusion in fissure aquifer at the top Ordovician limestone[J].Journal of China Coal Society，2021,46(11):3536-3549.
[7]胡少银, 刘泉声, 桑昊旻. 裂隙岩体注浆理论研究进展及发展趋势[J/OL].煤炭科学技术:1-15[2022-04-12].
HU Shaoyin, Liu Quansheng, SANG Haomin. Advance and review on the grounting critical problems in fractured rock mass[J].Coal Science and Technology, 1-15[2022-04-12].
[8]郑士田,马荷雯,姬亚东.煤层底板水害区域超前治理技术优化及其应用[J].煤田地质与勘探,2021,49(05):167-173.
ZHENG Shitian，MA Hewen，JI Yadong. Optimization of regional advanced coal floor water hazard prevention and control technology and its application[J]. Coal Geology & Exploration，2021，49(5): 167–173.
[9]郑士田.两淮煤田煤层底板灰岩水害区域超前探查治理技术[J].煤田地质与勘探,2018,46(04):142-146+153.
ZHENG Shitian.Advanced exploration and control technology of limestone water hazard in coal seam floor in Huainan and Huaibei coal-fields[J].Coal Geology & Exploration，2018，46(4)：142–146.
[10]孙阳, 赵永哲, 朱昌淮, 等.定向钻进工艺技术在探查疏放灰岩水中的应用[J].煤田地质与勘探,2019,47(S1):117-121.
SUN Yang，ZHAO Yongzhe，ZHU Changhuai，et al. Application of long directional borehole technology for exploration and drainage in limestone aquifer[J]. Coal Geology & Exploration，2019，47(S1)：117–121.
[11]金鑫, 段会军, 崔岩波, 等.桑树坪矿煤层底板注浆加固定向钻孔钻进技术[J].煤炭工程,2018,50(01):45-47+51.
JIN Xin, DUAN Huijun, CHUI Yanbo, et al. Drilling technology of directional drilled borehole for grouting reinforcement of coal seam floor in Sangshuping Coal Mine[J].COA ENGINEERING, 2018,50(01):45-47+51.
[12]安许良, 袁辉, 高岗荣.我国煤矿注浆用止浆塞综述[A]. 矿山建设工程技术新进展——2009全国矿山建设学术会议文集（下册）[C]//合肥:合肥工业大学出版社,2009:22-26.
[13]安许良, 袁辉, 高岗荣, 等.水力膨胀式止浆塞止浆压力与膨胀压力关系的试验探讨[J].建井技术，2011，32(1/2):87-89+66.
[14]蒲朝阳, 袁辉, 邓昀, 等.水力坐封止浆塞的研制与应用[J].煤炭工程, 2016, 48(10):135-137.
PU Chaoyang，YUAN Hui，DENG Yun，et al. Development and application of hydraulic setting packer[J]. COAL ENGINEERING，2016，48(10)：135–137.
[15]蒲朝阳, 杨雪, 袁辉, 等.水力坐封止浆塞试验研究及应用[J].建井技术, 2016, 37(2): 38-41.
PU Chaoyang, YANG Xue, YUAN Hui, et al. Experiment Study and Application of Hydrostatic Setting Packer[J].MINE CONSTRUCTION TECHNOLOGY, 2016, 37(2): 38–41.
[16]贾秉义, 陈冬冬, 吴杰, 等.煤矿井下顶板梳状长钻孔分段压裂强化瓦斯抽采实践[J].煤田地质与勘探,2021,49(02):70-76.
JIA Bingyi, CHEN Dongdong, WU Jie, et al. Practice of enhanced gas extraction by staged fracturing with comb-shaped long hole in coal mine roof[J]. Coal Geology & Exploration, 2021, 49(2): 70–76.
[17]牟全斌, 闫志铭, 张俭.煤矿井下定向长钻孔水力压裂瓦斯高效抽采技术[J].煤炭科学技术, 2020, 48(7): 296－303.
MOU Quanbin, YAN Zhiming, ZHANG Jian. High efficiency gas drainage technology of hydraulic fracturing with directional long drilling in underground coal mine[J].Coal Science and Technology, 2020, 48(7): 296－303.
[18]杜天林, 姜在炳, 张俭, 等.碎软煤层底板梳状孔分段压裂抽采瓦斯技术[J].煤矿安全, 2021, 52（1）: 107-113.
DU Tianlin, JIANG Zaibing, ZHANG Jian, et al. Gas extraction technology of staged fracturing with comb hole in soft seam floor[J].Safety in Coal Mines, 2021, 52（1）: 107-113.
[19]郭超奇, 赵继展, 李小建, 等.中硬低渗煤层定向长钻孔水力压裂瓦斯髙效抽采技术与应用[J].煤田地质与勘探, 2020, 48（6）: 103－108.
GUO Chaoqi, ZHAO Jizhan, LI Xiaojian, et al. Technology and application of high efficiency gas extraction by directional long borehole hy-draulic fracturing in coal seams of medium hardness and low permeability[J].Coal Geology & Exploration, 2020, 48（6）: 103－108.
[20]陈冬冬, 孙四清, 张俭, 等.井下定向长钻孔水力压裂煤层增透技术体系与工程实践[J].煤炭科学技术, 2020, 48(10): 84－89.
CHEN Dongdong, SUN Siqing, ZHANG Jian, et al. Technical system and engineering practice of coal seam permeability improvement through underground directional long borehole hydraulic fracturing[J].Coal Science and Technology, 2020, 48(10): 84－89.
[21]贺斌，雷鹏翔，弓仲标.水力压裂技术在大柳塔煤矿52502工作面的应用[J].煤炭科学技术，2021，49(S2)：78－84.
HE Bin，LEI Pengxiang，GONG Zhongbiao.Appincation of hydraulic fracturing technology in No.52502 working face of Daliuta Coal Mine[J]. Coal Science and Technology，2021，49(S2)：78－84.