Advanced Materials Research Vols. 838-841

Abstract: Our country has a long coastline and there are a lot of natural pebbles in coastal region. Applying natural pebbles in concrete is of great engineering significance and prospect. To measure the performance of coastal natural pebbles concrete and study the effect of aggregate on concrete properties, this article put forward a new comparison conditionthe same slump constant and cement dosage based on properties of coastal natural pebbles concrete and crushed stone concrete. Prepare different strength concrete under this condition. The compressive strength of pebble concrete is 100.5%110.7% times of stone concrete. The bending strength and fatigue strength are 97.8%108.1%, 135.8%176.6% respectively. This explains good static and fatigue properties of coastal natural pebbles. Pebble concrete has significant fatigue strength advantages in cement concrete pavement and concrete member under dynamic loading.

Abstract: A hydraulic simulation in pipes allows us to analyze the hydraulic behavior under various conditions. Hydraulic experiments are essential because there are many peculiarities in the analysis of the experimental processes. Computational fluid dynamics (CFD) tools assist in this process, they allow analyzes are made under the most varied conditions. Another parameter that typically affects the behavior of hydraulic fluid under pressure is the roughness of the materials that make up the pipes. In this work, we studied the variation of pressure in water pipes made from many common materials, such as plastic, cast iron and steel. Experimental data were used for validation, and the results showed variation in the parameters of the pressure and velocity fields.

Abstract: China is a country with rich coal, coal mining plays an important role in our country's energy security. But at the same time, in support of national progress of energy industry and national economic development, coal mining has caused a lot of damage to the ecological environment and social issues. The exploitation of underground resources not only leaded to the ground the destruction of arable land, but also damaged the ground coal mining under village buildings seriously. This leaded to the farmers of the coal mining under villages lost their survival, caused the contradiction between human and land and the contradiction of the cadres and the masses, causing a group petition and a series of incidents, directly affect sustainable development of the mining area. So according to the particularity of coal mining under villages, in this paper, systematic summary and analysis research of coal mining under village on recent literature ,have very important theoretical significance and social value.

Abstract: Jining city is one of the key coal national development base.The width of land subsidence area , the depth of collapse and the difficulty of its government are all rare in the nationwide. This paper analyzed the coal mining subsided land and village relocation situation in Jining city , summarized the situation of the coal mining subsided area comprehensive governance and the coal under villages relocation and pointed out the difficulties and contradictions of these two efforts.And it also proposed that establishing a sound reduction loss mechanism of cultivated land protection, and adjusting and perfecting the land policy of coal under villages relocation are the keys to solve the above problems.

Abstract: The Kcd (Karst colluvium and deluvium) deposit of Dongxiang copper mine had long been considered as a kind of ancient diluvium, alluvium and proluvium in Cretaceous Karst depression. Based on lithology and morphology analysis of Kcd, and further research for regional hydrogeology and hydrogeochemistry, it was considered as a new special Karst deposition form of metal ore in this project. In the oxidation zone of sulfide mineral deposit, Kcd was a deposition mixture of dolomite powder (sand) and eluvium of dolomite wall rock, which were generated by the action of sulfuric acid water on wall rock, and the collapse deposition from the overlying K₂n red beds. This kind of deposition was still generating and developing today. The monoclinal structure, primary sulfide mineral deposit occurred in clastic rock and claystone, dolomite and siliceous dolomite with 160m deep in underground water system, all that provided the development conditions of metal ore Karst deposition. This viewpoint could not only guide the copper ore exploration of Dongxiang type, but also provide a good case for Karst development in sulfide mineral areas.

Abstract: Based on logistics theory and borrowed ideas from logistics model inventory management, an ore logistics model of underground mine was built, and an analytical method which could be used to determine pass system storage capacity was proposed. Simulating real ore transfer process in underground mine mining system, ore input and ore output function of pass system were built, and real-time ore quantity in pass system was graphed. Through comprehensively analyzing the figure of real-time ore quantity in pass system and practical mining production, rational pass system storage capacity was calculated. Combined the practical ore transfer process of panel under level 1470 in Yunnan Tin Company Laochang tin mine number 13-8 ore cluster, storage capacity of pass system in panel is calculated which provided reasonable basis for pass system design in underground mine, and improved the reliability of mine engineering design.

Abstract: By using geological and geophysical data and according to the basic characteristics of sequence boundary, Putaohua Reservoir in Daan Oilfield is divided into a rise hemicycle in long-term cycles, a full middle-term cycle, nine short-term cycles and a number of ultra-short-term cycles.The high-resolution sequence stratigraphic framework of Putaohua reservoir under monosandbody rank is established, and a set of techniques and methods to high-resolution sequence stratigraphy correlation in shallow delta is summed up.

Abstract: With respect to the problems existed in the description of the adsorption characteristics of super-low rank and super-high rank coals using the conventional Langmuir adsorption model, in this paper, We first introduces the De Bore adsorption model into the coal seam gas adsorption, and utilizes the results of the ab initio calculation of quantum chemistry result and the isothermal adsorption test statistical results, simplifies the De Bore model equation. The new adsorption model is more suitable for describing the gas adsorption characteristics of the whole coal ranks. This new model has the stronger function and wider suitable scope than the Langmuir adsorption model.

Abstract: The Liaohe Jin 91block has entered the late period of steam huff and puff, the entire block is seriously water invaded. At this stage the water invasion regularity for edge-bottom water of heavy oil reservoir is not clear. In Jin 91 block two well group, for example, we model the fine geological with petrel soflware, application the CMG software throughput of history matching, and combined with homogeneous core model water influx the indoor physical model experiment,to research the water influx regulation of the edge-bottom water heavy oil reservoir. The results show that: the water invasion form is given priority to with bottom water coning, the Edge water tonguing is secondary, and in accordance with the experimental data at the same time, fitting out the exponential function relationship of water influx with the differential pressure and temperature. Which Provides a theoretical basis for promoting the development of edge-bottom water steam flooding of heavy oil reservoir.

Abstract: In the later period of water distribution to increase output of oilfield, it is difficult for the measuring and adjusting apparatus going down in the lubricator when the wellhead pressure reaches to some value, in separate zone injection testing. For this reason, we analyzed its reasons through theoretical derivation and experiments. According to the basic theory of statics of fluid mechanics, we derive and set the mathematical model among the static pressure differential of measuring and adjusting apparatus and the main factors such as wellhead pressure, cable diameter, etc. Indoor experiments and field testing jointly, we set the relationship of wellhead pressure affect the friction between the packing and the cables. The result: down resistance of measuring and adjusting apparatus in lubricator is linear with wellhead pressure and it is square with cable diameter, friction force between the packing and the cables have no big change while the wellhead pressure changes. Through the study of firing resistance, we can calculate the additional weight needed accurately when measuring and adjusting apparatus in lubricator fire and down, and provide theoretical basis for optimizing running parameters and heightening testing efficiency.