单一低透气性煤层水耦合深孔预裂爆破增透技术研究与应用

为解决单一低透气性煤层瓦斯透气性差、抽采困难、传统爆破方式增透效果不佳等问题,提出采用水耦合装药替代空气不耦合的方式。通过ANSYS/LS-DYNA软件建立水耦合装药深孔预裂爆破模型,分析水耦合装药方式爆破后应力波传递和裂隙的延伸效果,得出了水耦合装药方式能够更好的传递爆破产生的应力波。在河南省新郑煤电有限责任公司14207下底抽巷开展水耦合深孔预裂爆破试验,爆破致裂后,煤层瓦斯浓度和标态瓦斯纯流量都有提高,与数值模拟结果相互验证,表明该方法可以较好的增加煤层的透气性,改善单一低透气性煤层瓦斯抽采困难的问题。

一种盲插流体连接器的研究及设计

对某设备所采用的某盲插流体连接器关键O型密封圈在接通状态处于流体通道中,不能带压插拔,需要配备过滤装置,可靠性、安全性存在隐患、使用过程中出现的问题进行了分析,介绍了一种新型盲插流体连接器工作原理,所有密封圈在接通状态没有暴露在流速较大流体中,在一定压力下带压插拔误操作也不易受损,对冷却液体纯净度要求低,可以不配备过滤辅助装置,最后对该流体连接器通过相关试验验证进行了介绍。

Pore-Fracture Distribution Heterogeneity of Shale Reservoirs Determined by using HPMI and LPN_(2 )GA Tests

The compressibility of shale matrix reflects the effects of reservoir lithology, material composition, pore structure and tectonic deformation. It is important to understand the factors that influence shale matrix compressibility(SMC) and their effects on pore size distribution(PSD) heterogeneity in order to evaluate the properties of unconventional reservoirs.In this study, the volumes of pores whose diameters were in the range 6–100 nm were corrected for SMC for 17 shale samples from basins in China using high-pressure mercury intrusion and low-temperature nitrogen gas adsorption analyses,in order to investigate the factors influencing the SMC values. In addition, the variations in fractal dimensions before and after pore volume correction were determined, using single and multifractal models to explain the effects of SMC on PSD heterogeneity. In this process, the applicability of each fractal model for characterizing PSD heterogeneity was determined using statistical analyses. The Menger and Sierpinski single fractal models, the thermodynamic fractal model and a multifractal model were all used in this study. The results showed the following. The matrix compression restricts the segmentation of the fractal dimension curves for the single fractal Menger and Sierpinski models, which leads to a uniformity of PSD heterogeneity for different pore diameters. However, matrix compression has only a weak influence on the results calculated using a thermodynamic model. The SMC clearly affects the multifractal value variations, showing that the fractal dimension values of shale samples under matrix compression are small. Overall PSD heterogeneity becomes small for pores with diameters below 100 nm and the SMC primarily affects the PSD heterogeneity of higher pore volume areas. The comparison of fractal curves before and after correction and the variance analysis indicate that the thermodynamic model is applicable to quantitatively characterize PSD heterogeneity of shale collected from this sampling area. The results show that PSD heterogeneity increases gradually as micro-pore volumes increase.

6-31 Progress of Cryogenic System in 2014

During the year of 2014, the work of cryogenic group was mainly focused on operation of refrigerator system,test of TCM1, design and machining of HCM6. At the end of 2014 refrigerator system has achieved closed-loopoperation and recycle of helium gas, which did great contribution to superconducting cavity and superconductingmagnet test. Since the refrigerator was put into use(Fig. 1), it has operated continuously and reliably for more than5 110 h, reached helium lique ed capacity 270 L/h at 850 W.

Progress of Cryomodule System in 2017

ADS Injector-II linear accelerator is mainly composed of ECR ion source,LEBT,RFQ,MEBT,a superconducting accelerating segment and HEBT.The superconducting accelerating segment is composed of two HWR010 cavity cryomodules,a taper cavity cryomodule and a spoke cavity cryomodule(CM1+CM2+CM3+CM4),which has accelerated the proton beam to 25 MeV in Jun.2017.

大型矩形铝冷屏研制

冷屏是加速器用低温恒温器重要的组件之一,大型恒温器采用铝制冷屏为安装调试提供了极大方便。本文阐述了加速器用低温恒温器大型铝冷屏的设计方法,详细介绍了冷屏的结构设计、热设计及数值模拟与计算,最后介绍了铝管与铝板的焊接结构设计,解决了铝管焊接在低温下容易产生低温冷漏的问题,为其它加速器低温恒温器冷屏设计和类似装置冷屏设计提供参考。