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[1]王俊铭,刘擎,宝坤,等.考虑串孔影响的穿层水力扩孔合理冲煤量研究[J].中国安全生产科学技术,2019,15(1):93-99.[doi:10.11731/j.issn.1673-193x.2019.01.015]
　WANG Junming,LIU Qing,BAO Kun,et al.Research on reasonable coalflushing quantity of perforated hydraulic reaming considering influence of stringhole[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(1):93-99.[doi:10.11731/j.issn.1673-193x.2019.01.015]
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考虑串孔影响的穿层水力扩孔合理冲煤量研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年1期
页码:
93-99
栏目:
职业安全卫生管理与技术
出版日期:
2019-01-31

文章信息/Info

Title:
Research on reasonable coalflushing quantity of perforated hydraulic reaming considering influence of stringhole
文章编号:
1673-193X(2019)-01-0093-07
作者:
王俊铭1 ; 刘擎2; 宝坤1; 刘占新1; 杨路林1; 肖亚军1
(1.陕西铁路工程职业技术学院，陕西 渭南714000；2.河南理工大学 安全科学与工程学院，河南 焦作 454003)
Author(s):
WANG Junming1;  LIU Qing2;  BAO Kun1;  LIU Zhanxin1;  YANG Lulin1;  XIAO Yajun1
(1.Shaanxi Railway Institute, Weinan Shaanxi 714000, China;2. College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China)
关键词:
水力扩孔; 串孔影响; 合理冲煤量; Comsol模拟
Keywords:
hydraulic reaming;  stringhole influence;  reasonable coalflushing quantity;  Comsol simulation
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2019.01.015
文献标志码:
A
摘要:
在煤层增透方面，穿层水力扩孔冲出煤量主要依据经验以及遵循“能冲尽冲”的原则，致使串孔现象严重，针对这一问题，采用理论分析、数值模拟结合工程试验的方法，阐明了串孔致因机理和串孔前后扩孔孔硐内负压损失分布特征，构建了考虑吸附膨胀应力和Klinkenberg效应的扩孔孔硐附近煤体瓦斯流动流-固耦合数学模型，利用Comsol软件，模拟了不同冲煤量下扩孔孔硐附近煤体所受应力分布和煤体渗透率的变化情况。研究结果表明：随着煤体不断被冲出，孔硐有效抽采半径相对变化率呈现衰减趋势；扩孔孔硐附近最大主应力呈现先急剧减小再增大，然后降低直至原始应力大小的趋势；渗透率的变化趋势与最大主应力恰好相反；扩孔孔硐周围煤体渗透率的增加主要受煤体的径向位移所控制，孔硐周围煤体大幅径向位移会产生串孔现象，渗透率虽得到大幅度提高，但瓦斯抽采效果和安全采掘很难保证，需要厘定出水力扩孔合理冲出煤量。
Abstract:
In the aspect of permeability improvement of coal seam, the coalflushing quantity of perforated hydraulic reaming mainly depends on the experience and follows the principle of “as flushing as possible”, which leads to the serious phenomenon of stringhole. Aiming at this problem, by means of theoretical analysis, numerical simulation and engineering test, the causation mechanism of stringhole and the distribution characteristics of negative pressure loss in the reaming hole chamber before and after the stringhole were expounded. A mathematical model of fluidsolid coupling for gas flow in the coal body around the reaming hole considering the adsorption expansion stress and Klinkenberg effect was constructed, and the variation of stress distribution and coal permeability of the coal body around the reaming hole chamber under different coalflushing quantities was simulated by using the Comsol software. The results showed that with the continuous flushing of coal body, the relative change rate of effective extraction radius of hole chamber decreased. The maximum principal stress around the reaming hole chamber decreased sharply first and then increased, and then decreased to the original stress, and the change trend of permeability was opposite to that of the maximum principal stress. The increase of permeability of coal body around the reaming hole chamber was mainly controlled by the radial displacement of the coal body, but the large radial displacement of the coal body around the hole chamber would produce the phenomenon of stringhole, and although the permeability was greatly improved, the effect of gas extraction and safe mining was difficult to ensure, so it was urgent to determine the reasonable coalflushing quantity of the hydraulic reaming.

参考文献/References:

［1］胡杰，孙臣.穿层水力冲孔措施在低透煤层中有效抽采半径效果考察［J］.中国安全生产科学技术，2017，13（10）：48-52. HU Jie,SUN Chen.Effect inspection on effective impact radius of hydraulic flushing measures by perforated drilling holes in low permeability coal seam［J］.Journal of Safety Science and Technology,2017,13(10):48-52.
［2］刘彦伟，任培良，夏仕柏，等.水力冲孔措施的卸压增透效果考察分析［J］.河南理工大学学报(自然科学版)，2009，28(6)：695-699. LIU Yanwei, REN Peiliang, XIA Shibai,et al.Analysis of pressure-relief and permeability improvement effect of hydraulic flushing［J］. Journal of Henan Polytechnic University(Natural Science), 2009, 28(6): 695-699.
［3］郝富昌，支光辉，孙丽娟.考虑流变特性的抽放钻孔应力分布和移动变形规律研究［J］.采矿与安全工程学报，2013，30(3)：449-455. HAO Fuchang，ZHI Guanghui，SUN Lijuan. Stress distribution and movement law around drainage borehole when considering rheological property［J］. Journal of Ming & Safety Engineer, 2013, 30(3):449-455.
［4］刘威，张敬军，亢方超，等.考虑煤体蠕变位移的水力扩孔合理扩煤量［J］.中国安全科学学报，2017，27(3)：111-116. LIU Wei, ZHANG Jingjun, KANG Fangchao, et al. Reasonable coal amount of hydraulic flushing borehole considering creepdisplacement ［J］.China Safety Science Journal, 2017, 27(3): 111-116.
［5］王峰，陶云奇，刘东.水力冲孔卸压范围及瓦斯抽采规律研究［J］.煤炭科学技术，2017，45(10)：96-100. WANG Feng，TAO Yunqi，LIU Dong. Study on pressure released scope of hydraulic flushing and gas drainage law［J］.Coal Science and Technology, 2017, 45(10): 96-100.
［6］KONG X, WANG E, LIU X, et al. Coupled analysis about multi-factors to the effective influence radius of hydraulic flushing: Application of response surface methodology［J］. Journal of Natural Gas Science & Engineering, 2016,32:538-548
［7］冯文军，苏现波，王建伟，等. “三软”单一煤层水力冲孔卸压增透机理及现场试验［J］.煤田地质与勘探，2015，43(1)：100-103. FENG Wenjun, SU Xianbo, WANG Jianwei，et al. The mechanism and field test of permeability improvement by hydraulic flushing in three-soft and single coal seam［J］.Coal Geology & Exploration, 2015, 43(1):100-103.
［8］王凯，李波，魏建平，等.水力冲孔钻孔周围煤层透气性变化规律［J］.采矿与安全工程学报，2013，30(5)：778-784. WANG Kai, LI Bo, WEI Jianping, et al. Change regulation of coal seam permeability around hydraulic flushing borehole［J］. Journal of Ming & Safety Engineer, 2013, 30(5):778-784.
［9］袁德铸，李学臣.低透气性煤层水力冲孔增透合理冲孔煤量的确定［J］.煤矿安全，2016，47(9)：180-182. YUAN Dezhu, LI Xuechen. Determination of reasonable punching coal amount through hydraulic flushing permeability increasing in low permeability coal seam［J］.Safety in Coal Mines，2016，47(9)：180-182.
［10］王新新，石必明，穆朝民.水力冲孔煤层瓦斯分区排放的形成机理研究［J］.煤炭学报，2012，37(3)：467-471. WANG Xinxin，SHI Biming，MU Chaomin. Study on formation mechanism of gas emission partition in hydraulic flushing coal seam［J］. Journal of China Coal Society, 2012, 37(3):467-471.
［11］郝富昌，孙丽娟，赵发军.蠕变-渗流耦合作用下水力冲孔周围煤体渗透率时空演化规律［J］.中国安全生产科学技术，2016，12(8)：16-22. HAO Fuchang，SUN Lijuan，ZHAO Fajun. Reseach on coal permeability spatio-temporal evolution around hydraulic flushing based on creep-seepage coupling［J］. Journal of Safety Science and Technology, 2016, 12(8):16-22.
［12］李波，张路路，孙东辉，等.水力冲孔措施研究进展及存在问题分析［J］.河南理工大学学报(自然科学版)，2016，35(1)：16-22. LI Bo, ZHANG Lulu, SUN Donghui, et al. Hydraulic flushing research progress and its existed problems analysis［J］. Journal of Henan Polytechnic University(Natural Science), 2016, 35(1)：16-22.
［13］HOEK E, WOOD D, SHAH S. A modified Hoek-Brown criterion for jointed rock masses［C］// HUDSON J A . Proceedings of the Rock Characterization： Symposium of ISRM. London:British Geotechnical Society, 1992:209-214.
［14］苏现波，马耕.煤矿井下水力强化理论与技术［M］.北京：科学出版社，2014.
［15］王凯.顺层瓦斯抽采钻孔孔内负压分布规律及应用研究［D］.北京：煤炭科学研究总院，2014.
［16］王登科，魏建平，付启超，等.基于Klinkenberg效应影响的煤体瓦斯渗流规律及其渗透率计算方法［J］.煤炭学报，2014，39(10)：2029-2036. WANG Dengke, WEI Jianping, FU Qichao, et al. Coalbed gas seepage law and permeability calculation method based o Klinkenberg effect［J］. Journal of China Coal Society, 2014, 39(10):2029-2036.

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备注/Memo

备注/Memo:
收稿日期： 2018-11-18
基金项目： 陕西铁路工程职业技术学院2018年第二批科研基金项目（KY2018-87）
作者简介： 王俊铭，硕士，助教，主要研究方向为瓦斯灾害防治、施工安全与应急管理等。
更新日期/Last Update: 2019-01-31