摘要
为提高回采工作邻近层抽采瓦斯效果,减少回采过程中瓦斯涌出量,提出了采用倾向平行高位钻孔进行邻近层抽采瓦斯工艺。结合山西马军峪煤矿工程实践,对顶板周期来压期间邻近层钻孔抽采瓦斯量变化规律进行研究,得出顶板来压期间钻孔抽采瓦斯量及有效的抽采瓦斯时间明显增加,且抽采瓦斯量与抽采时间呈周期性波动,与顶板周期来压步距有较好相关性,提出了钻孔布置参数应考虑来压步距的影响。
To improve gas drainage effect in adjacent seams and reduce gas emission in actual mining,gas drainage parameters design by using inclined parallel with high position drilling have been proposed.Based on Majunyu Coal Mine situation,the change regulation of gas drainage amount in adjacent seams during roof periodic weighting has been studied.The results showed that the amount of gas drainage have been significantly increased.The effective gas drainage time has been enhanced as well.The relationship between gas drainage amount and time showed cyclical fluctuations and had correlation with weighting length.This paper proposed that borehole parameters should consider the effect of weighting length.
出处
《中国煤炭》
北大核心
2013年第9期98-101,共4页
China Coal
关键词
邻近层
瓦斯抽采
周期来压
来压步距
裂隙带
adjacent seams
gas drainage
periodic weighting
weighting length
fractured zone
