浅孔抽放,shallow hole drainage
1)shallow hole drainage浅孔抽放
1.According to the underground pressure distribution rule and the separation control function of drainage borehole,theshallow hole drainage technology is studied and tested by using the characteristic that the gas permeability may have an obvious increase after mining in front of the working face,obtaining some useful parameters,showing that the tech.根据矿山压力分布规律和抽放钻孔的隔断控制作用,并利用工作面前方煤体受采动卸压后透气性显著提高这一特性,研究并试验了卸压区浅孔抽放技术,获得了该抽放技术的工艺参数。
2.Mucus sealing is used in coalshallow hole drainage to seal the cracks around the hole.采用粘液密封钻孔周围裂隙是解决浅孔抽放过程中空气大量泄露的有效方法。
英文短句/例句
1.Study and Application of the Technique for Gas Drainage through Shallow Holes in the Stress-relaxing Zone at Pingmei No.4 Mine卸压区浅孔抽放技术在平煤四矿的研究与应用
2.Study on technique application of eliminating outburst by extracting gas from shallow hole in the fully mechanized mining face综采工作面浅孔瓦斯抽放消突技术应用研究
3.Analysis of calculation of expanded size of punched hole and compression punching type;浅析抽孔、压缩抽型的展开尺寸计算
4.Design for drawing out gas with high position boring at coal face轻放工作面抽放瓦斯高位钻孔的设计
5.A Study of the Second Hole Sealing Method to Improve Gas Drainage in Coal Seams煤层瓦斯抽放钻孔的二次封孔方法研究
6.Research on the technology of integrated interchange drilling to drainage gas综合立体交叉钻孔抽放瓦斯技术研究
7.Gas Drainage Technology of Goaf with Boreholes from Surface Ground of Tangshan Mine唐山矿地面钻孔抽放采空区瓦斯技术
8.Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究
9.Study on Technology of Bores Through Coal and Rock Seams Draining Long Distance Pressure Relief Gas in Bed Plate Tunnel;底抽巷上向穿层钻孔抽放远程卸压瓦斯技术研究
10.Gas drainage in seam with large auto variable diameter bore holes自动变径大直径钻孔抽放煤层瓦斯试验
11.Research on Bit for Efficient Drilling of Gas Drainage Borehole in Nantong Mining Area;南桐矿区瓦斯抽放孔快速钻进钻头的研究
12.Application and analysis on high level borehole gas drainage technology in mined-out area采空区高位钻孔瓦斯抽放技术应用与分析
13.Application of Gas Extraction Technology by High-level Fracture Borehole in Fully Mechanized Caving Face of Thick Coal Seam高位裂隙钻孔抽采技术在厚煤层综放面的应用
14.Application of Gas Drainage in Fractured Zone by Roof High-level Boreholes in Daping Coal Mine顶板高位钻孔裂隙带抽放在大平矿的应用
15.Experimental Investigation on Pressure Falling Method Measuring the Borehole"s Influence Radius压降法测定钻孔的抽放影响半径试验研究
16.The Optimized Study of Gas Taking out Parameters of High Position Boring of Taoyuan桃园矿高位钻孔瓦斯抽放参数优化研究
17.Gas Drainage by Boring Near Seam at 43001 Coal Face43001采煤工作面上邻近层穿层钻孔瓦斯抽放
18.Application of Gas Drainage Technology by High-level Boreholes in Gas Control of the Working Face高位钻孔抽放技术在工作面瓦斯治理中的应用
相关短句/例句
gas extracting of shallow hole浅孔瓦斯抽放
3)hole of sucking and exhaling抽放孔
4)borehole drainage钻孔抽放
5)gas drainage hde瓦斯抽放孔
6)cross drainage drilling holes穿层抽放钻孔
1.The experiment and determination of eliminating outburst drilling holes drainage radius with floor rockscross drainage drilling holes pre-drainage gas in No2-1 coal seam of Cuimiao Coal Mine are introduced.介绍了崔庙煤矿二1煤底板岩石穿层抽放钻孔预抽瓦斯消突钻孔抽放半径的实验与测定,确定了合理的抽放半径,以指导矿井消突工作。
延伸阅读
瓦斯抽放煤矿矿井中瓦斯涌出量很大，靠通风难以稀释排除时，可用抽放的方法,排除瓦斯,减少通风负担。40年代末,中国在抚顺煤田进行抽放瓦斯试验,50年代应用于生产，抽出数量逐年增加。其后阳泉、天府、中梁山、包头、南桐、北票等矿区也陆续开展抽放瓦斯工作。1981年全国一百多个矿井安设了抽放瓦斯设备，每年抽放瓦斯达3亿米3，供给工业、民用燃料和作化工原料，变害为利。抽放工艺在地面建立瓦斯泵站，经井下抽放瓦斯管道系统与抽放钻孔连接，泵运转时造成负压，将瓦斯抽出，送入瓦斯罐，或直接供给用户。如抽出瓦斯数量较小，或很不稳定，可直接排放到大气中。抽放方法按瓦斯来源不同，可分三类：①抽放开采煤层本身的瓦斯。开采高沼气厚煤层时，瓦斯主要来自开采层本身。抚顺煤矿在煤巷掘进前，从底板岩石巷道打钻穿透煤层,钻孔中插入钢管并将孔口周围密封,瓦斯从插管中抽出。因抽放超前于掘进、回采，使采掘工作减少了瓦斯威胁，此法又称"钻孔预抽瓦斯"。②抽放邻近煤层中的瓦斯。在多煤层矿井，用长壁工作面回采时，顶底板岩层和煤层（包括可采层与不可采层）卸压，瓦斯流动性增加，大量涌入工作面，危害生产。通常在回采前打钻孔到顶板或底板的邻近煤层，回采后瓦斯大量流入钻孔，通过孔口插管，将瓦斯抽出。③抽放采空区的瓦斯。有的矿井采空区大量涌出瓦斯，可在采空区周围密闭墙上插入钢管；也可以从巷道向采空区打钻孔，抽放瓦斯。在条件适宜时还可从地面钻孔抽放瓦斯。优点是不受井下采煤工作的限制和干扰，钻孔抽放工作可超前于采掘工作，抽放时间较充裕。缺点是钻孔较深，需排除孔内积水。发展趋势目前中国瓦斯抽放量只占抽放瓦斯矿井全部涌出量的20％。正在研究瓦斯流动规律，加大煤层的透气性和改进抽放工艺，进一步提高瓦斯抽放量。
