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PVC-U套管在小口径科学实验孔中的应用探讨
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作者 何玉云 訾兵 +2 位作者 王发民 曹学斌 何林 《钻探工程》 2023年第1期55-60,共6页
根据地质需要,采用XY-6B型钻机在内蒙古棋盘井煤矿区实施了一口设计深度535 m的科学实验孔,终孔孔深540 m,终孔口径133 mm,完钻后需进行地球物理测井工作。为了减小钢套管对入井仪器信号屏蔽,需要按地质设计下入?90 mm PVC-U套管,下PVC-... 根据地质需要,采用XY-6B型钻机在内蒙古棋盘井煤矿区实施了一口设计深度535 m的科学实验孔,终孔孔深540 m,终孔口径133 mm,完钻后需进行地球物理测井工作。为了减小钢套管对入井仪器信号屏蔽,需要按地质设计下入?90 mm PVC-U套管,下PVC-U套管前做了大量准备工作,主要从孔径参数设计、PVC-U套管连接改造、采用导正锥头防止PVC-U套管下入过程发生磨损卡钻及加工滤水管平衡冲洗液浮力等方面入手,顺利完成了该科学实验孔的PVC-U套管下管工作,确保了一系列孔内科学实验工作的顺利完成。 展开更多
关键词 科学实验孔 地球物理测井 PVC-U套管 导正锥头 滤水管 套管受力分析
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中关铁矿帷幕灌浆实验孔孔斜成因及处理 被引量:1
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作者 贾文亮 于辉增 王洪涛 《探矿工程(岩土钻掘工程)》 2007年第5期30-32,共3页
中关铁矿帷幕灌浆孔设计深度深、钻孔垂直度要求高,加之地质条件、水文条件的特殊性和复杂性,钻孔偏斜超标严重,经过实践,摸索出一套有效的防斜、纠斜技术措施。在分析孔斜原因的基础上,介绍了该工程的防斜、纠斜技术措施和取得的效果。
关键词 帷幕灌浆 实验孔 防斜 纠斜
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砂层深孔注浆实验及成果分析
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作者 陈安 《居业》 2023年第2期175-177,共3页
北京某地铁施工横通道临近既有地铁站,属于特级风险源,超前加固措施为全断面深孔注浆,为了保证既有地铁线路的安全运营,注浆过程中必须严格控制浆液配比、注浆压力及注浆量,同时为了保证后续即将进行的下穿既有线暗挖区间正常施工,因此... 北京某地铁施工横通道临近既有地铁站,属于特级风险源,超前加固措施为全断面深孔注浆,为了保证既有地铁线路的安全运营,注浆过程中必须严格控制浆液配比、注浆压力及注浆量,同时为了保证后续即将进行的下穿既有线暗挖区间正常施工,因此在同部位、同地层的横通道进行深孔注浆实验及成果进行分析,确定具体注浆数据,达到安全、平稳完成下穿既有线施工。 展开更多
关键词 临近既有线深注浆实验分析 工程概况 施工方案
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煤层水力喷射成孔实验研究 被引量:1
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作者 杨兆中 谭龙 +2 位作者 彭鹏 李小刚 覃兆勇 《油气藏评价与开发》 CSCD 2018年第2期73-75,79,共4页
煤层气藏在我国储量巨大且具有低压、低饱和、低渗透、非均质性强、储层构造复杂、煤岩易破碎的特点。水力喷射成孔工艺能够避免煤层坍塌,消除常规射孔所导致的压实效应,破碎煤岩改善储层的渗透性。通过大尺寸物理模型实验研究得出喷嘴... 煤层气藏在我国储量巨大且具有低压、低饱和、低渗透、非均质性强、储层构造复杂、煤岩易破碎的特点。水力喷射成孔工艺能够避免煤层坍塌,消除常规射孔所导致的压实效应,破碎煤岩改善储层的渗透性。通过大尺寸物理模型实验研究得出喷嘴直径变大且孔径增加、磨料浓度升高孔径增加但孔深先增加后减小、泵压升高孔深增加。筛选出一组泵压25MPa,喷嘴直径4mm,磨料浓度6.6%的作业参数,对现场施工的参数设计有指导作用。 展开更多
关键词 煤层气 水平井 水力喷射成实验 体积
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汽车白车身夹具同心孔实验及其应用研究 被引量:1
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作者 商祥伟 石蕴玉 王立涛 《企业科技与发展》 2016年第2期71-74,共4页
白车身同心孔实验就是通过在同一夹具上反复装配同心孔零件,通过观察其搭接区域的同心孔孔心的偏移大小,来推断夹具定位是否稳定。同心孔实验可以找出造成零件在夹具上定位波动的原因。通过分析这些原因,进而找到改进措施以达到提高零... 白车身同心孔实验就是通过在同一夹具上反复装配同心孔零件,通过观察其搭接区域的同心孔孔心的偏移大小,来推断夹具定位是否稳定。同心孔实验可以找出造成零件在夹具上定位波动的原因。通过分析这些原因,进而找到改进措施以达到提高零件定位稳定性的目的。在批量生产时,通过制作同心孔样件,在生产前利用同心孔样件对夹具进行检测确认,提前发现夹具精度的变化,保证车身制造质量的稳定性和一致性。 展开更多
关键词 夹具 同心实验 白车身 同心样件
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多色空间相干光经杨氏三孔干涉后的光谱奇异现象 被引量:2
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作者 舒建华 陈子阳 蒲继雄 《华侨大学学报(自然科学版)》 CAS 北大核心 2009年第4期399-402,共4页
研究相干光经杨氏三孔实验干涉后,在干涉场中的相位奇点附近所出现的光谱变化现象.结果表明,在相位奇点处附近的某些位置光谱出现"红移",而在另外一些位置光谱出现"蓝移",并且在一些特殊点光谱将分类为等高的两个峰... 研究相干光经杨氏三孔实验干涉后,在干涉场中的相位奇点附近所出现的光谱变化现象.结果表明,在相位奇点处附近的某些位置光谱出现"红移",而在另外一些位置光谱出现"蓝移",并且在一些特殊点光谱将分类为等高的两个峰.对两类特殊截面(垂直于三孔平面的截面和平行于三孔平面的截面)的相对平均频率变化进行研究,结果表明,多色空间相干光经杨氏三孔干涉后,其干涉场中的观察点的光谱将出现不同于原光谱的变化. 展开更多
关键词 杨氏三实验 光谱位移 光谱开关 奇点光学
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MQL:近于“干工况”铝合金钻孔的刀具涂层技术
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作者 关新宇 《汽车制造业》 2002年第5期22-22,24,共2页
目前,诸如高速切削(HSC)、淬硬钢切削和干式切削等技术已在现代金属加工业占有越来越大的比重。而这一切,都需要有高性能的刀具做保证。为此,本文将重点讨论新开发的PVD涂层在高性能刀具上的应用,并输以“铝合金的近于‘干工况’... 目前,诸如高速切削(HSC)、淬硬钢切削和干式切削等技术已在现代金属加工业占有越来越大的比重。而这一切,都需要有高性能的刀具做保证。为此,本文将重点讨论新开发的PVD涂层在高性能刀具上的应用,并输以“铝合金的近于‘干工况’的钻孔实验”加以说明。 展开更多
关键词 铝合金 实验 PVD涂层 高性能刀具
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煤矿水文地质勘探中群孔抽水试验的应用初探 被引量:1
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作者 郭文涛 《内蒙古煤炭经济》 2017年第20期157-158,共2页
群孔抽水实验是一种有效的地质条件勘探方法,可以通过对煤矿开采地进行群孔抽水来了解地下的水文地质情况。但群孔抽水实验的技术要求比较高,需要的实验时间也较长,实际操作难度较大。本文以某矿区为例,介绍群孔抽水实验。
关键词 煤矿 水文地质 勘探 抽水实验 作用
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Double-porosity rock model and squirt flow in the laboratory frequency band 被引量:8
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作者 巴晶 曹宏 +2 位作者 姚逢昌 聂建新 杨慧珠 《Applied Geophysics》 SCIE CSCD 2008年第4期261-276,共16页
Biot theory research has been extended to the multi-scale heterogeneity in actual rocks. Focused on laboratory frequency bandwidth studies, we discuss the relationships between double-porosity and BISQ wave equations,... Biot theory research has been extended to the multi-scale heterogeneity in actual rocks. Focused on laboratory frequency bandwidth studies, we discuss the relationships between double-porosity and BISQ wave equations, analytically derive the degeneration method for double-porosity's return to BISQ, and give three necessary conditions which the degeneration must satisfy. By introducing dynamic permeability and tortuosity theory, a full set of dynamic double-porosity wave equations are derived. A narrow band approximation is made to simplify the numerical simulation for dynamic double-porosity wavefields. Finally, the pseudo-spectral method is used for wave simulation within the laboratory frequency band (50 kHz). Numerical results have proved the feasibility for dynamic double-porosity's description of squirt flow and the validity of the quasi-static approximation method. 展开更多
关键词 double-porosity rock pseudo-spectral method self-affine fractal microscopicscale mesoscopic scale
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CFRP/铝合金叠层结构动态钻削力预测研究 被引量:8
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作者 于海夫 薛惠峰 《机械科学与技术》 CSCD 北大核心 2017年第1期68-73,共6页
建立了CFRP(carbon fiber reinforced plastics)/铝合金叠层结构制孔轴向力分阶段预测模型,提出一种面向分阶段的钻削过程描述方法。阐述了CFRP与铝合金的叠层方式,根据钻削过程中钻头所处位置确定不同的钻削阶段;在钻削过程分析的基础... 建立了CFRP(carbon fiber reinforced plastics)/铝合金叠层结构制孔轴向力分阶段预测模型,提出一种面向分阶段的钻削过程描述方法。阐述了CFRP与铝合金的叠层方式,根据钻削过程中钻头所处位置确定不同的钻削阶段;在钻削过程分析的基础上,通过解析建模方法给出了叠层结构动态轴向力预测方法,并详细分析了模型公式中积分限的计算方法;进行了叠层结构制孔实验,测量分阶段的瞬时制孔轴向力。通过对比发现提出的预测模型与实验值吻合较好,能够准确预测CFRP/铝合金叠层结构制孔轴向力。 展开更多
关键词 钻削力 预测模型 实验
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Adsorption of volatile organic compounds on three activated carbon samples:Effect of pore structure 被引量:11
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作者 李立清 宋剑飞 +3 位作者 姚小龙 黄贵杰 刘峥 唐琳 《Journal of Central South University》 SCIE EI CAS 2012年第12期3530-3539,共10页
To investigate the influence of the activated carbon pore structure on the adsorption of volatile organic compounds (VOCs), three commercial activated carbon samples were chosen. The fixed-bed thermostatic adsorptio... To investigate the influence of the activated carbon pore structure on the adsorption of volatile organic compounds (VOCs), three commercial activated carbon samples were chosen. The fixed-bed thermostatic adsorption experiments were conducted under certain conditions, where toluene, acetone, and 1, 2-dichloroethane acted as adsorbents. Then, the incidence relation between the experimental results and the activated carbon pore structure was analyzed. After that, the results of the correlation analysis were verified in accordance with fractal theory and adsorption characteristic curve analysis. The results show that the pore diameter gradient is helpful for strengthening the intemal diffusion. Under the same condition, the adsorption of organic gases tends to be selective, and the positions of toluene, acetone and 1, 2-dichloroethane adsorbed on the activated carbon are mainly in the ranges of 1.27-1.49 nm, 0.67-0.84 nm and 1.39-1.75 nm, respectively. The relationship between adsorption capacity and activated carbon pore volume can accurately explain the spreading process of the adsorbents in the activated carbon. 展开更多
关键词 activated carbon volatile organic compounds ADSORPTION pore structure SELECTIVITY
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致密砂岩储层物性测试合理平衡时间探讨
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作者 宋南希 罗明高 +2 位作者 周俊骅 罗茂殊 高丽敏 《地质论评》 CAS CSCD 北大核心 2017年第B04期263-264,共2页
致密砂岩是指低孔低渗(岩石孔隙度小于或等于10%,基质覆压渗透率小于或等于0.1 mD)(1m D=1×10^(-3)μm^2)的砂岩。致密砂岩储层与常规储层相比,其沉积背景和沉积环境、成岩演化、孔隙类型、孔喉结构、孔隙连通性、储集性等... 致密砂岩是指低孔低渗(岩石孔隙度小于或等于10%,基质覆压渗透率小于或等于0.1 mD)(1m D=1×10^(-3)μm^2)的砂岩。致密砂岩储层与常规储层相比,其沉积背景和沉积环境、成岩演化、孔隙类型、孔喉结构、孔隙连通性、储集性等方面均有较大差异,从而造成低孔低渗、小孔喉,渗流阻力大,流体进入比较缓慢。所以储层物性测试结果往往误差会比较大(2010,蔡希源;2009,谷江锐)。 展开更多
关键词 致密砂岩 储层物性 覆压实验 平衡时间
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A Theoretical Model for the Size Prediction of Single Bubbles Formed under Liquid Cross-flow 被引量:3
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作者 刘长军 梁斌 +2 位作者 唐盛伟 张海广 闵恩泽 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第5期770-776,共7页
The size of initial bubbles is an important factor to the developed bubble size distribution in a gas-liquid contactor. A liquid cross-flow over a sparger can produce smaller bubbles, and hereby enhance the performanc... The size of initial bubbles is an important factor to the developed bubble size distribution in a gas-liquid contactor. A liquid cross-flow over a sparger can produce smaller bubbles, and hereby enhance the performance of contactor. A one stage model by balancing the forces acting on a growing bubble was developed to describe the formation of the bubble from an orifice exposed to liquid cross-flow. The prediction with this model agrees with the experimental data available in the literatures, and show that orifice size strongly affects the bubble size. It is showed that the shear-lift force, inertia force, surface tension force and buoyancy force are major forces, and a simplified mathematical model was developed, and the detachment bubble diameter can be predicted with accuracy of <±21%. 展开更多
关键词 bubble formation liquid cross-flow one stage model force balance
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Numerical simulation and experiment analysis of improving permeability by deep-hole presplitting explosion in high gassy and low permeability coal seam 被引量:6
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作者 CAI Feng LIU Ze-gong +1 位作者 LIN Bai-quan LI Wei 《Journal of Coal Science & Engineering(China)》 2009年第2期175-180,共6页
Created a new damage model for explosive for LS-DYNA3D,taking advantageof the Taylor method aimed at the high gassy and low permeability coal seam,and numericallysimulated and analyzed the deep-hole presplitting explo... Created a new damage model for explosive for LS-DYNA3D,taking advantageof the Taylor method aimed at the high gassy and low permeability coal seam,and numericallysimulated and analyzed the deep-hole presplitting explosion.The entire processof explosion was represented,including cracks caused by dynamic pressure,transmissionand vibration superposition of stress waves,as well as cracks growth driven by gas generatedby explosion.The influence of the cracks generated in the process of explosion andthe performance of improving permeability caused by the difference of interval between.explosive holes were analyzed.A reasonable interval between explosive holes of deepholepresplitting explosions in high gassy and low permeability coal seams was proposed,and the resolution of gas drainage in high gassy and low permeability coal seam was putforward. 展开更多
关键词 High gassy and low permeability coal seam deep-hole presplitting explosion stress wave crack growth
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A new method of cut-blasting for vertical shaft excavation and its experimental study 被引量:5
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作者 ZHANG Yi-ping WENG Chun-lin CHI En-an 《Journal of Coal Science & Engineering(China)》 2010年第1期17-22,共6页
Based on cutting principle and technology development of vertical blasthole cutby stage and deck in vertical shaft excavation, combined with the merits of middle spacecharging and toe space charging, the reinforced cu... Based on cutting principle and technology development of vertical blasthole cutby stage and deck in vertical shaft excavation, combined with the merits of middle spacecharging and toe space charging, the reinforced cutting effect of central large-diameterblasthole and the method of cutting blast by stage and deck toe space charging for thevertical large-diameter blastholes was put forward and analyzed theoretically.This new cutblasting method is provided with the advantages of high blasthole using ratio, big cavitybulk, low rate of chunk, even lumpiness, and relatively high energy using ratio.The parameterchoices and practical effects of this cutting method were discussed after in situexperiment.It shows that the decked delay time of 75~100 ms is applicable. 展开更多
关键词 cutting of vertical blasthole by stage and deck blast excavation space charging cutting experiment
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Hot shear deformation constitutive analysis of fine-grained ZK60 Mg alloy sheet fabricated via dual equal channel lateral extrusion and sheet extrusion 被引量:5
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作者 N.FAKHAR M.SABBAGHIAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第8期2541-2556,共16页
Dual equal channel lateral extrusion(DECLE)process with various passes followed by sheet extrusion process was performed to produce fine-grained ZK60 alloy sheets.The coarse grain structure of the annealed sample afte... Dual equal channel lateral extrusion(DECLE)process with various passes followed by sheet extrusion process was performed to produce fine-grained ZK60 alloy sheets.The coarse grain structure of the annealed sample after applying sheet extrusion(size:68μm)changed to fine grains of 6.0 and 5.2μm after 3 and 5 passes of DECLE and following extrusion.The hot shear deformation behavior of samples was studied by developing constitutive equations based on shear punch test(SPT)results.SPT was carried out in the temperature range of 200−300℃ and strain rate range of 0.003−0.33 s^(–1).The activation energy of 125−139 kJ/mol and the stress exponent of 3.5−4.2 were calculated for all conditions,which indicated that dislocation creep,controlled by dislocation climb and solute drag mechanism,acted as the main hot deformation mechanism.It was concluded that material constants of n and Q are dependent on the microstructural factors such as grain size and second phase particle fraction,and the relationship of which was anticipated using a 3D surface curve.Moreover,the similar strong basal texture of extruded sheets gave rise to the same deformation mechanisms during SPT and similar n and Q values for ZK60 alloy. 展开更多
关键词 ZK60 Mg alloy constitutive equation EXTRUSION hot deformation shear punch test metal forming
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Development of experimental study on coupled heat and moisture transfer in porous building envelope 被引量:2
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作者 陈国杰 刘向伟 +2 位作者 陈友明 郭兴国 邓永强 《Journal of Central South University》 SCIE EI CAS 2012年第3期669-674,共6页
A new facility was presented which can expediently and cheaply measure the transient moisture content profile in multi-layer porous building envelope.Then,a common multi-layer porous building envelope was provided,whi... A new facility was presented which can expediently and cheaply measure the transient moisture content profile in multi-layer porous building envelope.Then,a common multi-layer porous building envelope was provided,which was constructed by cement mortar-red brick-cement plaster.With this kind of building envelope installed in the south wall,a well-controlled air-conditioning room was set up in Changsha,which is one of typical zones of hot and humid climate in China.And experiments were carried out to investigate the temperature and moisture distribution in multi-layer building envelope in summer,both in sunny day and rainy day.The results show that,the temperature and humidity at the interface between the brick and cement mortar are seriously affected by the changes of outdoor temperature and humidity,and the relative humidity at this interface keeps more than 80% for a long-term,which can easily trigger the growth of mould.The temperature and humidity at the interface between the brick and cement plaster change a little,and they are affected by the changes of indoor temperature and humidity.The temperature and humidity at the interface of the wall whose interior surface is affixed with a foam plastic wallpaper are generally higher than those of the wall without wallpaper.The heat transfer and moisture transfer in the envelope are coupled strongly. 展开更多
关键词 coupled heat and moisture transfer transient moisture content multi-layer porous building envelope
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应用电法确定煤矿采空区积水 被引量:2
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作者 刘益永 董哲 《吉林地质》 2012年第1期93-97,共5页
瞬变电磁法在煤炭勘查工作中应用已经很普遍,特别是在煤矿采空区及积水采空区勘探中应用效果更加明显。瞬变电磁法在煤炭勘查工作中应用要从孔旁实验入手,了解全区地质概况,为异常解释建立理论模型,结合实测数据处理,获得大量的定性、... 瞬变电磁法在煤炭勘查工作中应用已经很普遍,特别是在煤矿采空区及积水采空区勘探中应用效果更加明显。瞬变电磁法在煤炭勘查工作中应用要从孔旁实验入手,了解全区地质概况,为异常解释建立理论模型,结合实测数据处理,获得大量的定性、定量数据,通过图件上的异常特征分析,局部异常的认识,结合煤系地层的物性特征分析解释其构造形态。 展开更多
关键词 采空区 积水采空区 实验 相对视电阻率 相对低阻 相对高阻
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Hydrodynamic Performance of Multiple-Row Slotted Breakwaters 被引量:1
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作者 Moussa S. Elbisy Ehab M. Mlybari Medhat M. Helal 《Journal of Marine Science and Application》 CSCD 2016年第2期123-135,共13页
This study examines the hydrodynamic performance of multiple-row vertical slotted breakwaters. We developed a mathematical model based on an eigenfunction expansion method and a least squares technique for Stokes seco... This study examines the hydrodynamic performance of multiple-row vertical slotted breakwaters. We developed a mathematical model based on an eigenfunction expansion method and a least squares technique for Stokes second-order waves. The numerical results obtained for limiting cases of double-row and triple-row walls are in good agreement with results of previous studies and experimental results. Comparisons with experimental measurements of the reflection, transmission, and dissipation coefficients (CR, Cr, and CE) for double-row walls show that the proposed mathematical model adequately reproduces most of the important features. We found that for double-row walls, the CR increases with increasing wave number, kd, and with a decreasing permeable wall part, din. The Cr follows the opposite trend. The CE slowly increases with an increasing kd for lower kd values, reaches a maximum, and then decreases again. In addition, an increasing porosity of dm would significantly decrease the CR while increasing the Cr. At lower values of kd, a decreasing porosity increases the CE, but for high values of kd, a decreasing porosity reduces the Ce. The numerical results indicate that, for triple-row walls, the effect of the arrangement of the chamber widths on hydrodynamic characteristics is not significant, except when kd〈0.5 Double-row slotted breakwaters may exhibit a good wave-absorbing performance at kd〉0.5, where by the horizontal wave force may be smaller than that of a single wall. On the other hand, the difference between double-row and triple-row vertical slotted breakwaters is marginal. 展开更多
关键词 slotted breakwaters Stokes second-order waves transmission coefficient reflection coefficient dissipation coefficient horizontal wave force
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瞬变电磁法在吉林省头道沟煤炭普查中的应用
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作者 陈晓勇 马丽娜 +2 位作者 张壮 荆保沢 汤庆云 《长春工程学院学报(自然科学版)》 2010年第4期76-80,共5页
瞬变电磁法在煤炭勘查工作中应用已经很普遍,但多解性使其应用比其他方法(如直流电法、地震)在认识上更显困难。因此瞬变电磁法在煤炭勘查工作中应用要从孔旁实验入手,了解全区地质概况,为异常解释建立理论模型,结合实测数据处理,获得... 瞬变电磁法在煤炭勘查工作中应用已经很普遍,但多解性使其应用比其他方法(如直流电法、地震)在认识上更显困难。因此瞬变电磁法在煤炭勘查工作中应用要从孔旁实验入手,了解全区地质概况,为异常解释建立理论模型,结合实测数据处理,获得大量的定性、定量数据,通过图件上的异常特征分析、局部异常的认识,结合煤系地层的物性特征分析解释其构造形态。 展开更多
关键词 观测装置 实验 相对视电阻率 相对低阻
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