期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Similarity criteria and coal-like material in coal and gas outburst physical simulation 被引量:19
1
作者 Bo Zhao Guangcai Wen +5 位作者 Haitao Sun Dongling Sun Huiming Yang Jie Cao Linchao Dai Bo Wang 《International Journal of Coal Science & Technology》 EI 2018年第2期167-178,共12页
Coal and gas outburst is one of the main gas hazards in coal mines. However, due to the risks of the coal and gas outburst, the field test is difficult to complete. Therefore, an effective approach to studying the mec... Coal and gas outburst is one of the main gas hazards in coal mines. However, due to the risks of the coal and gas outburst, the field test is difficult to complete. Therefore, an effective approach to studying the mechanism and development of outburst is to conduct the similar physical simulation. However, the similarity criteria and similar materials in outburst are the key factors which restrict the development of physical simulation. To solve those problems, this paper has established similarity criteria base on mechanics model, solid-fluid coupling model and energy model, and presented high similar materials. Combining with three groups of similar number, and considering similar mechanical parameters and deformation and failure regularity, the similarity criteria of outburst is determined on the basis of the energy model. According to those criteria, we put forward a similar material consists of pulverized coal, cement, sand, activated carbon, and water. The similar material has high compressive strength and the accordant characteristics with the raw coal, include density, porosity, adsorption, desorption. The new research is promising for preventing and controlling gas hazards in the future. 展开更多
关键词 Coal and gas outburst Physical simulation similarity criteria Similar material
下载PDF
Similarity theory for the physical simulation of natural gas hydrate reservoir development 被引量:7
2
作者 LIU Yaping CHEN Yueming +1 位作者 BAI Yuhu LI Shuxia 《Mining Science and Technology》 EI CAS 2010年第5期782-788,共7页
In order to apply physical simulation results to natural gas hydrate reservoir parameters to provide a theoretical framework for the design of a development plan,an analytical equation method was used to obtain the si... In order to apply physical simulation results to natural gas hydrate reservoir parameters to provide a theoretical framework for the design of a development plan,an analytical equation method was used to obtain the similarity criteria of natural gas hydrate reservoir development by physical simulation,based on a mathematical model of natural gas hydrate development.Given the approach of numerical simulation,a sensitivity analysis for all parameters was carried out,which specifically demonstrated that initial temperature is the most important parameter.Parameters of thermal conductivity coefficients are not necessary for conducting the NGH dissociation process,which will fundamentally simplify the design and establishment of the model.The analysis provides a sound theoretical basis and design principles for particular similarity. 展开更多
关键词 mathematical model equation analysis similarity criteria nature gas hydrate sensitivity analysis
下载PDF
Model test of the cutting properties of a shearer drum 被引量:12
3
作者 LIU Song-yong DU Chang-long CUI Xin-xia CHENG Xue 《Mining Science and Technology》 EI CAS 2009年第1期74-78,共5页
According to similarity theory, we carried out a dimensional analysis of the shearer drum correlation parameters and built similarity criteria. Based on these, similarity models of shearer drums were developed. Simult... According to similarity theory, we carried out a dimensional analysis of the shearer drum correlation parameters and built similarity criteria. Based on these, similarity models of shearer drums were developed. Simultaneously, based on an estab- lished cutting testbed of the coal and rock, cutting tests of different pick arrangements of the drum models were carried out, where the compressive strength of the analogous cutting material was 2.48 MPa and the drum rotary speed 67.5 r/min. The variance, the mean values, maxima and mean maxima of the torque load were analyzed for different type drum models. Moreover, the relation-ships between the type of pick arrangements and the cutting lump coal percentage were studied. The results indicate that the load fluctuation of the sequence drum is larger than that of the punnett square drum in the cutting process and the lump coal percentage and economic benefits of the sequence drum are inferior to the punnett square drum. We conclude that the punnett square drum is superior to the sequence drum. 展开更多
关键词 similarity theory dimensional analysis similarity criteria cutting test lump coal percentage
下载PDF
Three-dimensional physical simulation and optimization of water injection of a multi-well fractured-vuggy unit 被引量:6
4
作者 Ji-Rui HOU Ze-Yu Zheng +4 位作者 Zhao-Jie Song Min LUO Hai-Bo Li Li Zhang Deng-Yu Yuan 《Petroleum Science》 SCIE CAS CSCD 2016年第2期259-271,共13页
With complex fractured-vuggy heterogeneous structures, water has to be injected to facilitate oil pro- duction. However, the effect of different water injection modes on oil recovery varies. The limitation of existing... With complex fractured-vuggy heterogeneous structures, water has to be injected to facilitate oil pro- duction. However, the effect of different water injection modes on oil recovery varies. The limitation of existing numerical simulation methods in representing fractured- vuggy carbonate reservoirs makes numerical simulation difficult to characterize the fluid flow in these reservoirs. In this paper, based on a geological example unit in the Tahe Oilfield, a three-dimensional physical model was designed and constructed to simulate fluid flow in a fractured-vuggy reservoir according to similarity criteria. The model was validated by simulating a bottom water drive reservoir, and then subsequent water injection modes were optimized. These were continuous (constant rate), intermittent, and pulsed injection of water. Experimental results reveal that due to the unbalanced formation pressure caused by pulsed water injection, the swept volume was expanded and consequently the highest oil recovery increment was achieved. Similar to continuous water injection, intermit- tent injection was influenced by factors including the connectivity of the fractured-vuggy reservoir, well depth, and the injection-production relationship, which led to a relative low oil recovery. This study may provide a constructive guide to field production and for the devel- opment of the commercial numerical models specialized for fractured-vuggy carbonate reservoirs. 展开更多
关键词 Multi-well fractured-vuggy unit Three-dimensional physical model similarity criteria Bottom water drive. Optimization of water injection mode
下载PDF
Experimental Study and Simulation Principles of An Oil-Gas Multiphase Transportation System 被引量:3
5
作者 吴应湘 郑之初 +2 位作者 李东晖 劳力云 马艺馨 《China Ocean Engineering》 SCIE EI 2000年第1期33-44,共12页
Presented is an experimental study on the performance of an oil-gas multiphase transportation system, especially on the multiphase flow patterns, multiphase pumping and multiphase metering of the system. A dynamic sim... Presented is an experimental study on the performance of an oil-gas multiphase transportation system, especially on the multiphase flow patterns, multiphase pumping and multiphase metering of the system. A dynamic simulation analysis is conducted to deduce simulation parameters of the system and similarity criteria under simplified conditions are obtained. The reliability and feasibility of two-phase flow experiment with oil and natural gas simulated by water and air are discussed by using the similarity criteria. 展开更多
关键词 multiphase flow similarity criteria simulation principle oil-gas multiphase transportation
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部