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[1]田坤云,韩兆彦,毕寸光.顶板水力挠动强制卸压煤层瓦斯抽采工程实践*[J].中国安全生产科学技术,2021,17(3):71-76.[doi:10.11731/j.issn.1673-193x.2021.03.011]
　TIAN Kunyun,HAN Zhaoyan,BI Cunguang.Engineering practice of hydraulic disturbance to coal seam roof for forced pressure relief and gas drainage[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(3):71-76.[doi:10.11731/j.issn.1673-193x.2021.03.011]
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顶板水力挠动强制卸压煤层瓦斯抽采工程实践*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年3期
页码:
71-76
栏目:
职业安全卫生管理与技术
出版日期:
2021-03-31

文章信息/Info

Title:
Engineering practice of hydraulic disturbance to coal seam roof for forced pressure relief and gas drainage
文章编号:
1673-193X(2021)-03-0071-06
作者:
田坤云; 韩兆彦 ; 毕寸光
(1.河南工程学院 资源与安全工程学院，河南 郑州 451191；
2.安阳市主焦煤业有限责任公司，河南 安阳 455141 )
Author(s):
TIAN Kunyun;  HAN Zhaoyan;  BI Cunguang
(1.School of Resources and Safety Engineering,Henan University of Engineering,Zhengzhou Henan 451191,China;
2.Anyang Zhujiao Coal Industry Co.,Ltd.,Anyang Henan 455141,China)
关键词:
顶板砂岩; 增浓提效; 卸压增透; 水力挠动; 抽采纯量
Keywords:
roof sandstone;  gas concentration and efficiency improvement;  pressure relief and permeability improvement;  hydraulic disturbance;  gas drainage pure flow
分类号:
X936；TD713
DOI:
10.11731/j.issn.1673-193x.2021.03.011
文献标志码:
A
摘要:
对塑性松软煤体进行水力挠动较难取得理想的瓦斯增浓提效效果，为克服该措施的局限性，使松软煤层有效卸压增透，可将挠动对象转移至煤层顶板砂岩。基于对顶板砂岩水力挠动裂隙发育、延展及煤层卸压增透机理分析，在试验矿井的松软煤层及顶板砂岩中分别施工钻孔进行水力挠动试验，同时采用多级指标对措施后的瓦斯抽采效果进行考察。结果表明：水力挠动作用下砂岩体内部形成有利于下部煤层瓦斯流动的裂隙网络，抽采流量、浓度及累计抽采纯量大幅提高；但由于高压水作用下松软煤体内部发生塑性变形、裂隙堵塞、瓦斯流动性弱化，导致抽采流量、浓度及累计抽采纯量不升反降。研究结果可为松软煤层实施水力挠动提供参考，以期实现较理想的瓦斯治理效果。
Abstract:
It is difficult to obtain the ideal goal of gas concentration and efficiency improvement by the hydraulic disturbance on plastic soft coal body.In order to overcome the limitation of this measure,for the aim of gas pressure relief and permeability improvement of soft coal seam,the disturbance object could be transferred to the roof sandstone of coal seam.Based on the analysis of the development and extension of hydraulic disturbance fracture of roof sandstone,and the mechanism of pressure relief and permeability improvement of coal seam,the hydraulic disturbance tests were carried out by constructing boreholes in soft coal seam and roof sandstone in the testing mine respectively,at the same time,the multilevel indexes were used to investigate the effect of gas drainage after applying the measures.The results showed that under the effect of hydraulic disturbance,the fracture network formed in the sandstone was beneficial to the gas flow in the lower coal seam,and the gas drainage flow,concentration and cumulative pure flow increased greatly.On the contrary,under the effect of highpressure water,the plastic deformation occurred in the soft coal body,the fissures were blocked,the gas flow was weakened,and the gas drainage flow,concentration and cumulative pure flow did not rise but fall.The research results provide reference for implementing hydraulic disturbance in the soft coal seam to achieve more ideal gas control effect.

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备注/Memo

备注/Memo:
收稿日期： 2020-10-23
* 基金项目： 国家自然科学基金项目（51604091）；河南工程学院科研培育基金项目（PYXM202017）
作者简介： 田坤云，博士，副教授，主要研究方向为矿井瓦斯灾害预测及防治、瓦斯渗流。
更新日期/Last Update: 2021-04-13