摘要
为了保障穿层抽采钻孔施工安全和提高被保护层卸压瓦斯抽采效果,通过上保护层开采邻近煤层瓦斯涌出情况的分析和上保护层开采底板煤岩体卸压特征的数值模拟分析,对不同层间距被保护层穿层抽采钻孔的合理布孔方式进行了研究。现场试验表明:下伏不同层间距被保护层底板穿层抽采钻孔不同的布置方式能保障钻孔的安全施工和被保护层卸压瓦斯高效抽采。
In order to ensure construction security of throughout drainage bore-hole and improve released gas extracting result of protected coal seam, the reasonable bore-hole arrangement pattem for protected coal seam with different interlayer distances is researched through theoretical analyzing adjacent coal seam gas emission and numerical simulation analyzing bottom coal and rock mass pressure relief features of mining up- per protective layers. The field study shows that using different pattern of throughout drainage bore-hole in various interlayer distances bottom coal and rock mass could ensure construction security of throughout drainage bore-hole and improve released gas extracting result of protected coal seam.
出处
《世界科技研究与发展》
CSCD
2011年第4期608-610,共3页
World Sci-Tech R&D
关键词
上保护层开采
卸压
穿层钻孔
瓦斯抽采
upper protective layers mining
pressure relief
penetration bore-hole
gas extraction
