Advance Search
Shen Chunming. Simulation analysis on stress-damage evolution of pressure relief and permeability increasing with slotted seam under surrounding pressure[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (12).
Citation: Shen Chunming. Simulation analysis on stress-damage evolution of pressure relief and permeability increasing with slotted seam under surrounding pressure[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (12).

Simulation analysis on stress-damage evolution of pressure relief and permeability increasing with slotted seam under surrounding pressure

More Information
  • Available Online: April 02, 2023
  • Published Date: December 24, 2015
  • In order to analyze the coal wall spalling, dilling bit jammed and other problems occurred in the seam gateway driving in the seam after the hydraulic sIo tting, punching and other hydraulic pressure releasing and permeability improved technology conducted, a physical similarity simulation combined with a particle flow so ftware PFC numerical simulation method was applied to simulate and analyze the internal stress and crack dynamic evolution process of the slotted seam under the sur rounding pressure condition and to discuss the damage and failure features after the seam slotted. The results showed that when several slots made in the seam, a stre ss concentration would be occurred at the end of the adjacent slot and the damage development would occurred in the seam. Thus the pressure released role of the se am at the top and bottom of the slotting profile would be obvious. With the thickness of the slot increased, the pressure released effect of the slot profile would be incre ased, the seam would be damaged and deformed easily and the porosity would be obviously increased. The slotting within the seam would strengthen the uneven of the seam stress field and the crack field, the stress at the slot end and boundary would remarkably increase the unstability of the seam and the designed rational slot size would be an effective method to reduce the drilling difficulty of the seam gateway and the maintenance difficultyt of the gateway.
  • Related Articles

    [1]TANG Hailong, FAN Yuping, MA Xiaomin, DONG Xianshu, CHANG Ming. Study of slime water mixing process intensification using impingement flow regulation[J]. COAL SCIENCE AND TECHNOLOGY, 2023, 51(10): 323-335. DOI: 10.13199/j.cnki.cst.2022-1460
    [2]GUO Fangyu, ZHANG Youfei, LUO Jiaqian, XING Yaowen, GUI Xiahui. Effect of particle shape on detachment behavior betweenlong flame coal particles and bubble[J]. COAL SCIENCE AND TECHNOLOGY, 2020, 48(11): 217-222.
    [3]MU Tian, MA Dongmin, CHEN Yue, GAO Zheng, ZHANG Hui, TENG Jinxiang, YANG Fu, SHAO Kai, ZHANG Lin. Start-migration law of coal powder with different particle sizes under multi-phase flow conditions in coalbed methane wells[J]. COAL SCIENCE AND TECHNOLOGY, 2020, 48(5).
    [4]SU Ding, LUO Zhenfu. Gas-solid two-phase flow model and its applicationin vibrated fluidized bed of fine coal[J]. COAL SCIENCE AND TECHNOLOGY, 2018, (12).
    [5]SHEN Chunming, LIN Baiquan, LIU Ting, WANG Weihua, YANG Xin. Analysis on particle flow of crack propagation in slotting coal and rock sample[J]. COAL SCIENCE AND TECHNOLOGY, 2018, (7).
    [6]Xu Houxue. Study on bedding drilling slotting permeability improvement,water injection and dust control technology of low permeability seam[J]. COAL SCIENCE AND TECHNOLOGY, 2016, (9).
    [7]Li Yanzeng. Study and application of guide slot directional hydraulic pressurized penetration and permeability improved technology[J]. COAL SCIENCE AND TECHNOLOGY, 2016, (4).
    [8]Li Zongfu Sun Dafa Chen Jiufu Lei Hongbo Xiao Songqiang, . Application of permeability improving technology combined with hydraulic pressure fracturing and hydraulic slotting[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (10).
    [9]GUO Chen-ye SHEN Da-fu ZHANG Cui-lan WANG Shu-qi GUO Chen, . Key technology and application of controlled hydraulic fracturing and seams permeability improvement in underground coal mine[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (2).
    [10]CHEN Zhi-qiang XU Chunjiang QI Zheng-yi HUANG Ya-fei, . Effects of Scraper Running Speed on Internal Flow Field in Shallow Slot Heavy Medium Separator[J]. COAL SCIENCE AND TECHNOLOGY, 2014, (2).
  • Cited by

    Periodical cited type(8)

    1. 王文才,王鹏,吴周康,李扬康,杨少晨. 煤矸石山斜坡面矸石散体的空气渗流特性研究. 煤炭科学技术. 2024(05): 139-151 . 本站查看
    2. 林键,杨溢,曹广勇,刘洋,邵晚行. 静水压作用下砂岩渗透特性及渗透率模型改进. 地下空间与工程学报. 2024(03): 776-787 .
    3. 张亚妹,孙淦,白晓宇,何来胜,张胜凯,于龙涛,许永亮,王希瑞,闫楠. 泥岩地基动力打入桩承载特性研究进展. 科学技术与工程. 2023(01): 13-25 .
    4. 阚玉萍,肖亮. 持力层稳定性对管桩竖向承载力设计值的影响. 四川建材. 2023(02): 90-92 .
    5. 周刚,李帅龙,徐乙鑫,李琳,孟群智,王琪. 杉木锯屑基高吸水抑尘材料制备及效果分析. 煤炭科学技术. 2023(02): 232-242 . 本站查看
    6. 张伟光,郑晓东,柏建彪,王捞捞,陈俊智,马晓川,李金波. 新疆矿区弱胶结巷道顶板灾害现状及控制对策. 煤矿安全. 2023(06): 163-169 .
    7. 李海祥,曹志国,吴宝杨,池明波,张保. 煤矿覆岩裂隙地下水渗流特征的试验研究. 煤炭科学技术. 2023(06): 168-176 . 本站查看
    8. 任建慧,杨森,李宣良,姚士茂,宋小飞,刘耀辉. 富水顶板大变形破坏特征及分区动态支护技术研究. 中国矿业. 2023(11): 152-159 .

    Other cited types(7)

Catalog

    Article views (127) PDF downloads (204) Cited by(15)
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return