静态膨胀剂开裂煤与瓦斯突出煤层的试验研究

doi:10.16265/j.cnki.issn1003-3033.2019.08.016

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (8): 99-104.doi: 10.16265/j.cnki.issn1003-3033.2019.08.016

静态膨胀剂开裂煤与瓦斯突出煤层的试验研究

谢雄刚^1,2 教授, 赵先伟¹, 邓爱萍² 实验师, 王潞欧¹, 李维翔¹

1 贵州大学矿业学院,贵州贵阳 550025;
2 贵州大学教务处,贵州贵阳 550025

收稿日期:2019-04-10 修回日期:2019-06-19 发布日期:2020-10-21
作者简介:谢雄刚 (1971—),男,湖南郴州人,博士,教授,主要从事煤矿安全开采技术、煤与瓦斯突出灾害防治等方面的研究工作。E-mail:414929960@qq.com。
基金资助:
国家自然科学基金资助(51864009);贵州省科技厅项目(黔科合平台人才[2018]5781号,黔科合支撑[2017]2821)。

Experimental study of cracking coal and gas outburst coal by static expansion agent

XIE Xionggang^1,2, ZHAO Xianwei¹, DENG Aiping^1,2, WANG Luou¹, LI Weixiang¹

1 Mining College, Guizhou University, Guiyang Guizhou 550025,China;
2 Office of Educational Administration, Guizhou University, Guiyang Guizhou 550025,China

Received:2019-04-10 Revised:2019-06-19 Published:2020-10-21

摘要/Abstract

摘要： 为明确静态膨胀剂能否开裂煤矿采掘工作面突出煤层问题,建立水泥槽试验模型,根据水泥槽内被压实的突出煤层的膨胀孔、控制孔、孔间距、排距等参数,设置Ⅰ、Ⅱ和Ⅲ等共3种试验方案,分析静态膨胀剂作用下各方案突出煤样膨胀开裂效果及影响因素。结果表明:水泥槽试验模型中突出煤样的两次膨胀均经历裂隙发育显著增加、裂隙传播和裂隙扩展贯通3个明显变化过程,钻孔间形成大量径向交叉裂隙网;钻孔直径、自由面、钻孔布置均影响静态膨胀剂对煤样的开裂效果;同一钻孔孔径试验验方案中,方案Ⅲ的开裂效果最好;随着控制孔数增加而其他参数不变时,第一次膨胀发育产生的裂隙长度随控制孔的增加而减小。

关键词: 静态膨胀剂, 突出煤层, 水泥槽试验模型, 开裂效果, 裂隙网

Abstract: In order to identify whether the static expansion agent can crack the outburst coal seam in the working face of mine, the experimental model of cement tank was built. According to parameters such as the expansion hole, control hole, hole spacing and row spacing of the compacted outburst coal seam in the cement tank, three experiment schemes ofⅠ,Ⅱand Ⅲ were set up, and the cracked effect and its influencing factors in the schemes were analyzed under the action of static expansion agent. The experimental results show that two expansions of outburst coal samples in experiments all experience three obvious change processes-fracture development, propagation and interpenetration, that a large number of crack network along radial cross are formed between the drills, that the drill diameter, free surface and borehole layout all influence its cracking effect on the outburst coal samples, that in the same drilling experiment, the cracked effect of the plan Ⅲ is the best, and that with the other parameters keeping constant, as the number of the control hole increases, the crack length in the first expansive development will decreases.

Key words: static expansion agent, outburst coal, experimental model of cement tank, cracked effect, crack network

中图分类号:

X936

谢雄刚, 赵先伟, 邓爱萍, 王潞欧, 李维翔. 静态膨胀剂开裂煤与瓦斯突出煤层的试验研究[J]. 中国安全科学学报, 2019, 29(8): 99-104.

XIE Xionggang, ZHAO Xianwei, DENG Aiping, WANG Luou, LI Weixiang. Experimental study of cracking coal and gas outburst coal by static expansion agent[J]. China Safety Science Journal, 2019, 29(8): 99-104.

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静态膨胀剂开裂煤与瓦斯突出煤层的试验研究

Experimental study of cracking coal and gas outburst coal by static expansion agent

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