Advance Search

HU Yachao,XIONG Zuqiang,WANG Chun,et al. Research on high-efficiency sealing material and technology of coal roof deep-hole pre-splitting blasting[J]. Coal Science and Technology,2023,51(4):30−36

. DOI: 10.13199/j.cnki.cst.2021-0357
Citation:

HU Yachao,XIONG Zuqiang,WANG Chun,et al. Research on high-efficiency sealing material and technology of coal roof deep-hole pre-splitting blasting[J]. Coal Science and Technology,2023,51(4):30−36

. DOI: 10.13199/j.cnki.cst.2021-0357

Research on high-efficiency sealing material and technology of coal roof deep-hole pre-splitting blasting

Funds: 

National Natural Science Foundation of China (51904093,52074101)

More Information
  • Received Date: April 06, 2022
  • Available Online: May 11, 2023
  • Based on the difficulty of sealing, low sealing efficiency, and high labor intensity in the process of deep hole pre-splitting blasting of the coal roof with traditional sealing materials, a high-efficiency sealing material was proposed. The material has the characteristics of short curing time, high early strength, and strong pump ability, the initial setting time of the material is 3.0min, and the curing time is 8.0min; The reaction exothermic temperature is not higher than 70 ℃, lower than the ignition temperature of the electric detonator; And the compressive strength of 0.5 h is 5.96 MPa, which is nearly 25 times higher than the 0.232 MPa of clay stemming material;  By analyzing the hole sealing mechanism of grouting materials, it is determined that the compressive strength of efficient hole sealing materials meets the requirements of hole sealing.; In order to further study the sealing strength of high-efficiency sealing materials, the sealing strength of high-efficiency sealing materials under static load was tested by the RMT-150 rock mechanics testing system with the comparison of clay mud materials; At the same time, according to the characteristics of the material, a set of accurate, easy-to-operate and efficient sealing technology was designed and field engineering tests were carried out. The results show that: under static compressive load, the compressive resistance of the sealing material and the residual pressure of the material increase with the increase of the sealing length, and the compressive load strength of the high-efficiency sealing material is much greater than that of the clay mud material; With the same length of sealing hole, the sealing strength of high-efficiency sealing material is much higher than that of the clay mud material.. Single hole sealing time is 15 min, sealing 0.5 h can be blasted; After blasting, the roof integrity is relatively good, co concentration is 5−20, in line with the blasting safety requirements.. It shows that High efficiency hole sealing material blasting hole sealing not only has a good hole sealing effect, but also realize blasting hole sealing mechanized operation, solve the problem of roof deep hole sealing, greatly improve the efficiency of blasting hole sealing, compared with the traditional hole sealing process has made great progress.

  • [1]
    雷海鑫. 不同炮孔堵塞材料对矿山露天爆破效果的影响[J]. 爆破器材,2017,46(4):51−54. doi: 10.3969/j.issn.1001-8352.2017.04.011

    LEI Haixin. Effect of blocking materials of blast hole on open blasting of mine[J]. Explosive Materials,2017,46(4):51−54. doi: 10.3969/j.issn.1001-8352.2017.04.011
    [2]
    张英华,梁铜柱,崔景昆. 高水材料在“三软”煤层注水、防尘、封孔技术中的应用研究[J]. 煤炭学报,2003,28(1):46−49. doi: 10.3321/j.issn:0253-9993.2003.01.010

    ZHANG Yinghua,LIANG Tongzhu,CUI Jingkun. Applied research on the sealing technology of injection in “weak seam, roof and floor” for dust control with high-water rapid-solidifying material[J]. Journal of China Coal Society,2003,28(1):46−49. doi: 10.3321/j.issn:0253-9993.2003.01.010
    [3]
    王晓云,陆丽园. 炮孔封堵材料研究[J]. 煤矿爆破,2018(4):13−15. doi: 10.3969/j.issn.1674-3970.2018.04.004

    WANG Xiaoyun,LU Liyuan. Study on material of blast-hole stemming[J]. Coal Mine Blasting,2018(4):13−15. doi: 10.3969/j.issn.1674-3970.2018.04.004
    [4]
    韩 飞, 隧道爆破炮孔堵塞作用机理及其试验研究[D]. 长沙: 长沙理工大学, 2015.

    HAN Fei. Experiment on the blocking mechanism of tunnel blasting hole [D]. Changsha: Changsha University of Science & Technology, 2015.
    [5]
    王兆丰,席 杰,陈金生,等. 底板岩巷穿层钻孔一孔多用瓦斯抽采时效性研究[J]. 煤炭科学技术,2021,49(1):248−256.

    WANG Zhaofeng,XI Jie,CHEN Jinsheng,et al. Study on time effectiveness of gas drainage by crossing layer drilling in floor rock roadway with one hole and multi-purpose[J]. Coal Science and Technology,2021,49(1):248−256.
    [6]
    王 杰,张雷林,伍 清. 新型爆破封孔材料的制备与应用[J]. 煤矿安全,2018,49(3):56−59,64.

    WANG Jie,ZHANG Leilin,WU Qing. Preparation and application of new sealing material for blasting[J]. Safety in Coal Mines,2018,49(3):56−59,64.
    [7]
    梁 瑞,吕亚茹,周文海,等. 地下采场爆破炮孔堵塞效应及长度研究[J]. 地下空间与工程学报,2020,16(5):1546−1554.

    LIANG Rui,LU Yaru,ZHOU Wenhai,et al. Study on blockage effect and the stem length in underground stope blasting[J]. Chinese Journal of Underground Space and Engineering,2020,16(5):1546−1554.
    [8]
    王会峰. 聚氨酯封堵炮孔研究[D]. 北京: 中国地质大学(北京), 2012.

    WANG Huifeng. Researching on polyurethane blocking blast hole[D]. Bengjing: China University of Geosciences, 2012.
    [9]
    陆丽园,王晓云,赵显莹,等. 聚氨酯封孔材料在炮孔封堵中的应用探索[J]. 爆破,2018,35(1):142−146. doi: 10.3963/j.issn.1001-487X.2018.01.023

    LU Liyuan,WANG Xiaoyun,ZHAO Xiaoying,et al. Study on application of polyurethane foaming material in blast-hole stemming[J]. Blasting,2018,35(1):142−146. doi: 10.3963/j.issn.1001-487X.2018.01.023
    [10]
    杨东辉,宁掌玄,赵毅鑫,等. 冲击载荷下新型炮眼堵塞器的力学特征研究[J]. 地下空间与工程学报,2020,16(2):608−614.

    YANG Donghui,NING Zhangxuan,ZHAO Yixin,et al. Study on mechanical characteristics of a new type of blast hole plug under impact loading[J]. Chinese Journal of Underground Space and Engineering,2020,16(2):608−614.
    [11]
    马春德,刘泽霖,王业顺,等. 大断面隧道掘进中炮孔快速堵塞新方法研究[J]. 矿冶工程,2020,40(4):6−9. doi: 10.3969/j.issn.0253-6099.2020.04.002

    MA Chunde,LIU Zelin,WANG Yeshun,et al. A new method for rapid blockage of boreholes in large-section tunneling excavation[J]. Mining and Metallurgical Engineering,2020,40(4):6−9. doi: 10.3969/j.issn.0253-6099.2020.04.002
    [12]
    梁 冰,贾立锋,孙维吉,等. 深孔预裂爆破注浆封孔材料力学特性实验[J]. 实验力学,2017,32(1):123−130. doi: 10.7520/1001-4888-16-068

    LIANG Bing,JIA Lifeng,SUN Weiji,et al. Experimental study of mechanical properties for grouted sealing material in deep hole pre-splitting blasting[J]. Journal of Experimental Mechanics,2017,32(1):123−130. doi: 10.7520/1001-4888-16-068
    [13]
    刘思佳,王直亚,赵荣阔. 深孔预裂爆破封孔技术的研究[J]. 煤矿安全,2014,45(11):72−73. doi: 10.13347/j.cnki.mkaq.2014.11.021

    LIU Sijia,WANG Zhiya,ZHAO Ruokuo. Study on deep-hole pre-splittingblasting hole sealing technique[J]. Safety in Coal Mines,2014,45(11):72−73. doi: 10.13347/j.cnki.mkaq.2014.11.021
    [14]
    刘 博, 水炮泥堵塞作用机理模型试验及应用研究[D]. 长沙: 中南大学, 2014.

    LIU Bo. Model test and application study on water stemming mechanism[D]. Changsha: Central South University, 2014.
    [15]
    傅建秋,李战军,蔡建德,等. 胶状乳化炸药和电雷管的耐高温性能试验研究[J]. 爆破,2008,25(4):7−10,27. doi: 10.3963/j.issn.1001-487X.2008.04.002

    FU Jianqiu,LI Zhanjun,CAI Jiande,et al. Experimental research on resistance to elevated temperatures of colloidal emulsion explosive and electric detonator[J]. Blasting,2008,25(4):7−10,27. doi: 10.3963/j.issn.1001-487X.2008.04.002
    [16]
    伍 清. 早强速凝爆破封孔材料的实验研究与应用[D]. 淮南: 安徽理工大学, 2017.

    WU Qing. Experimental Study and application of early Strength and rapid solidification blasting sealing material[D]. Huainan: Anhui University of Science & Technology, 2017.
    [17]
    张学博,王文元,蔡行行. 深部煤层抽采钻孔变形失稳影响因素研究[J]. 煤炭科学技术,2021,49(5):159−166.

    ZHANG Xuebo,WANG Wenyuan,CAI Hanghang. Study on influencing factors of deformation and instability of deep coal seam drainage borehole[J]. Coal Science and Technology,2021,49(5):159−166.
    [18]
    路晓荣,李西凡,熊祖强,等. 新型深孔爆破高效封孔材料及封孔新工艺[J]. 煤矿安全,2020,51(9):148−152.

    LU Xiaorong,LI Xifan,XIONG Zuqiang,et al. New rapid sealing material of deep hole blasting and its process[J]. Safety in Coal Mines,2020,51(9):148−152.
    [19]
    罗 勇,沈兆武. 钻孔爆破中炮孔堵塞效果及堵塞长度的研究[J]. 力学与实践,2006,28(2):48−52. doi: 10.3969/j.issn.1000-0879.2006.02.011

    LUO Yong,SHEN Zhaowu. Investigation on length of stemming material and its effect in hole charged blasting[J]. Mechanics in Engineering,2006,28(2):48−52. doi: 10.3969/j.issn.1000-0879.2006.02.011
    [20]
    王建强,张 杰,杜学明. 复杂地层高位定向长钻孔成孔工艺研究与应用[J]. 煤炭科学技术,2021,49(8):168−173.

    WANG Jianqiang,ZHANG Jie,DU Xueming. Research and application of high-level directional longborehole hole-forming technology in complex stratum[J]. Coal Science and Technology,2021,49(8):168−173.

Catalog

    Article views (158) PDF downloads (69) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return