摘要
在腾辉煤矿试验区域,分别施工穿层和顺层钻孔,利用瓦斯压降法,测定钻孔瓦斯抽采影响半径。现场试验研究表明,在试验条件相同、抽采时间相同(20d)的情况下,穿层钻孔瓦斯抽采有效影响半径比顺层钻孔要大0.4 m之多。由此可以推断,对于同一煤层,在抽采条件及有效抽采长度相同的情况下,穿层钻孔比顺层钻孔能抽出更多的瓦斯。
In a trial area of Tenghui Mine,individually with the construction of the drilling through strata borehole and the drilling along the stratum borehole,agas pressure reduced method was applied to measure the gas drainage influence radius of the borehole.The site test study showed that under the same test conditions and the same drainage time（20 days）conditions,the gas drainage effective influence radius of the drilling through strata borehole was over 0.4 mlarger than the drilling along stratum borehole.Therefore,an inference could be made that under a same drainage condition and same effective drainage length and in a same seam,the drilling through strata borehole could have a more gas drainage than the drilling along seam borehole.
作者
王乔磊
WANG Qiaolei(Lyulin Energy Chemical, Coal and Electric Power Comprehensive Project Department Huozhou Coaland Electric Popover Group ,Lyuliang 033200,Chin)
出处
《建井技术》
2018年第1期40-43,共4页
Mine Construction Technology
关键词
穿层钻孔
顺层钻孔
瓦斯抽采
影响半径
瓦斯流动
drilling through strata borehole
drilling along stratum borehole
gas drainage
influence radius
gas flow
