摘要
为解决黄陵二矿煤层瓦斯抽采易造成抽采空白带以及抽采范围小、时间短、无法超前治理瓦斯的问题,对黄陵二矿409工作面进行了定向长钻孔瓦斯预抽试验。通过长钻孔设计及施工工艺的改进,有效提高了施工效率,预抽两年后,煤层瓦斯含量降为1.56~1.73m3/t,预抽率仍达到42.52%~48.17%。瓦斯压力由原来的0.65MPa降低到0.19~0.28MPa。工期缩短35d,钻孔瓦斯初始流量提高了1.46倍,有效消除了煤层抽采盲区,杜绝了采掘过程中发生瓦斯超限现象。
As the coal seam gas drainage drilling in Huangling mining No. 2 Mine often penetrated the roof and floor,causing the problems of blank zone drainage,repeated drainage,small drainage area and short drainage time,which made advance gas control impossible,a gas pre-drainage test with directional long borehole was carried out in No. 409 working face of Huangling No. 2 Mine. Through improvement of long borehole design and construction technology,the construction efficiency was enhanced. After two years of drainage,coal seam gas content was reduced to 1. 56 ~ 1. 73m3/ t,drainage rate reached 42. 52% ~ 48. 17%. The gas pressure of coal seam reduced from 0. 65 MPa to 0. 19 ~ 0. 28 MPa. Time limit for the project shortened 35 days,the initial flow of drilling gas increased 1. 46 times. Thus,the coal drainage blind area and gas overrun in mining was eliminated.
出处
《煤炭工程》
北大核心
2016年第10期84-87,共4页
Coal Engineering
关键词
定向长钻孔
瓦斯抽采
抽采参数
长钻孔设计
施工工艺
directional long boreholes
gas drainage
drainage parameters
long borehole design
construction technology
作者简介
朱兴攀（1987-），男，甘肃张掖人，硕士，主要从事煤自燃预测预报技术、煤矿火灾灾害防治理论与技术及瓦斯灾害防治技术的研究工作，E-mail：zhuxingpan126@163．com。
