Using the RFPA~(2D)-Flow to simulating the process of the gas drainage in low air permeability coal bed by slotting, it prove that slotting is an efficient technique to reduce the risk of coal and gas out bursting.
运用岩石破裂分析系统(RFPA2D-Flow)模拟了割缝排放低透气性煤层内瓦斯的过程,验证了割缝排放煤层内瓦斯是降低低透气性煤层煤与瓦斯突出危险的有效方式。
petroleum slotted pipe is a tool for sand prevention in the petroleum production of oil field.
石油割缝筛管是油田采油防砂常用的工具。
The slotted pipe with narrow slots can be mass worked economically and efficiently by means of open loop system and hand automatic model shifter.
采用开环系统和手动、自动模式切换装置，可以经济、有效、大量地加工带有窄缝的割缝筛管。
This paper based on the low gas permeability coal seam 416 stope working face of Tongchuan mineral bureau,we analyzed the mechanism of the hydraulic cutting seam to improve the gas permeability coal seam,by this study,it shows the hydraulic cutting seam technology is effectual measure and it is provided with nicer practically and capacious foreground.
文章以铜川矿务局陈家山煤矿低透气性416综放工作面为研究背景,深入研究了水力割缝增强煤层透气性的作用机理,试验表明了水力割缝的确是一种提高低透气性煤层瓦斯抽放的有效措施,并具有良好的实用性和广阔的推广前景。
In this paper,we analyzed the mechanism of the high-pressure Abrasive hydraulic cutting seam technology in detail,introduced the research status quo of its technologic flow chart and correlative technology parameter and then expatiated the outbursts prevention effect of it in outbursts coal's fast head-cutting.
系统地分析了高压磨料水力割缝防突技术的机理,介绍了其工艺流程和有关技术参数的研究情况,阐述了高压磨料水力割缝防突技术在突出煤层快速掘进中的防突作用,试验表明了高压磨料水力割缝防突技术是突出煤层快速掘进中的一项有效防突措施,其具有良好的实用性和广阔的推广前景。
The testing research about enhancing permeability rate by hydraulic cutting seam on outsize coal sample is introduced.
介绍了特大煤样采用水力割缝提高瓦斯渗透率的实验研究 。
Regarding the slotted liner destruction caused under non-uniform loads, the effects of non-uniform loads on the collapse strength of slotted liner is studied, the mechanical model for slotted liner is set up, and the collapse strengths under different loads and the variations of the collapse strengths of the slotted liners with different thicknesses as non-uniformity changes are analyzed.
针对割缝管在非均匀载荷作用下引起套管损坏的问题,在研究非均匀载荷对套管抗挤强度影响的基础上,以有限单元法为基础,建立了割缝衬管的力学模型,分析了割缝衬管在不同载荷模式下的抗挤强度以及不同壁厚割缝衬管的抗挤强度随不均匀系数的变化关系。
According to the properties of Pinghu oilfield in East China Sea, the well completion method of A3 horizontal well is determined as initial well completion by slotted liner and later sand control by metal fibre screen pipe.
针对东海平湖油田的特点,确定了该油田A3水平井合理的完井方法是:割缝衬管先期完井和金属纤维防砂筛管后期防砂。