Advanced Materials Research Vols. 838-841

Abstract: In this paper, a multi-module coupled oil spill model is applied for simulating the influence scope of oil with the hydrodynamic current field data and wind field data. A case study is researched in this paper. The model works well and the numerical simulation results show the model is suitable for oil spill influence scope simulation.

Abstract: International and domestic crude oil metering gap, difference between oil volume measurement and quality measurement, and crude oil metering standards are discussed

Abstract: The technologies applied to develop PetroChina low-permeability reservoirs are summarized in the past more than 20 years. These technologies include water injection in advance, waterflood pattern optimization, fracturing and horizontal wells, etc. In addition, future technology trend is also forecasted.

Abstract: On the bases of theoretic analysis, numerical simulation, and project practice, stress distribution of surrounding rock and movement characteristics of roof strata in T-junction area of gob-side entry were analyzed. Besides, control technology in T-junction area was proposed after indicating deformation characteristics of different stages in gob-side entry. Results show that there is an inclined block in T-junction area after fracture of main roof and the period when the block is tending to stability is a critical stage of pressure appearance for gob-side entry. Further, three stress zones: in-situ stress zone, abutment pressure zone and low stress zone appear in both strike and dip of mining panel and enhanced support of gob-side entry before excavation should keep away from the abutment pressure zone, which also indicates that deep bolting support can exert the bearing capacity of deep rock mass. Additionally, the whole procedure of surrounding rock deformation can be divided into four stages and deformation in gob-side entry is larger than that of entry excavation, which means that efficient support design should be taken into account. Ultimately, district control technologies for surrounding rock of gob-side entry in back zone, filling zone, and front zone are proposed and it showed a good adaption in project practice of coalmine.

Abstract: Loose blasting technology is applied to the problem of fully mechanized coal face passing through fault. The paper gets safe and practical loose blasting parameters and blasting process, achieves no re-open-off cut for the fully mechanized coal face, reduces loss of coal pillars for faults and improves the coal recovery rate. At last, the goal of high yield, steady yield, and increasing yield for fully mechanized mining face is realized.

Abstract: Compared with I-shaped and U-shaped supports in soft rock roadway, concrete-filled steel tubular (CFST) support, as a new supporting form, has stronger bearing capacity with reasonable price. So it is becoming more and more popular in roadway supporting of coal mine in China. In this article, the surrounding rock in soft rock roadway was classified into three different types: hard rock in deep coal mine, soft surrounding rock, extremely soft surrounding rock. And, according to the characteristics of deformation failure of the CFST support and the surrounding rock in the industrial tests, three different strength assessments, including assessment of axial compressive strength, assessment of lateral flexural performance, assessment of hardening rate of core concrete, were proposed through mechanical analysis and laboratory tests for the three different types of the surrounding rock, respectively. Moreover, aimed to insufficient flexural strength of the support or low hardening rate of the core concrete in some of the roadway supporting, strengthening lateral flexural performance or making early strength concrete was necessary for the above unfavorable situations. The laboratory test results showed that the ultimate bearing capacity for the CFST support with φ194*8mm of steel tube reinforced by φ38mm round steel was 31% greater than that of the unreinforced one, 177% greater than that of the U-shaped one with equivalent weight per unit length.

Abstract: Landslip in coal area is a special kind of ecological landscape. Now, the ecological restoration and reconstruction of the landscapes has become more important due to man-made destruction, such as structural and functional degradation, severe damage of its utilization value and service function. The productive and living functions are restored, and eco-economical benefits and aesthetic value were increased through rehabilitation and reconstruction of the ecological landscape in coal area. The present state and the types of the landslips in the coal mine area were first discussed; then, several patterns of the correspondent management and utilization fit for different types of landslips are sought out; and then, the Teng-nan Coal Mine in Zaozhuang city in China was taken as an example to analyze the benefits of the utilization and management. Finally, the ecological reconstruction of landscape in landslip area was under discussion.

Abstract: Microwave activated coal gangue is a complex process, which is bound up with irradiation time, fineness, composition and other factors.Coal gangue is not easily absorbed substances,so it could be get microwave energy for activation from strong wave absorbing materials. In this paper,as influence of the activation process of coal gangue by microwave irradiation time, establish the computer simulation model by ANSYS.As a reference to modify the activation process,improve and perfect the model of microwave activated coal gangue.

Abstract: Study on the forms of mercury is helpful to remove Hg from coal or flue gas more effectively. This paper focus on the coal from three main production base of China, and the Hg content in coal samples was measured by Zeeman effect-mercury analyzer (Lumex RA-915+and RP-91). Moreover, the chemical composition and main phase in coal sample were studied by XRF and XRD. The research results show the Hg content has a close rotation with Si and Al in coals. With the increasing of Si and Al there is more Hg in coals, it further prove the main form of Hg in coals is intergrowth with clay.

Abstract: Part of the gas fields utilize eddy current instruments to drainage and gas recovery currently, while the mechanism of drainage and gas recovery is not clear. This article conducts drainage and gas recovery simulating caculation, analyses the impact of gas flow rate, the moisture content of bottomhole and eddy current tool structure of its drainage effect, basing on the theory of gas-liquid two-phase flow. The results show that: the gas flow rate, moisture content and the normal section shape of eddy current tool spiral piece are the main factors that affect the eddy current tools draining. As follows: the larger the gas flowing rate, the better the tool draining effect; when the bottomhole moisture content is less than 10%, the draining effect is not obvious; but when the bottomhole moisture content is greater than 10%, with higher the moisture content, the draining effect is more obvious; the normal section shape of spiral piece is better to be rectangular rather than trapezoidal; the direction of rotation of the spiral piece (left and right hand) has little effect on draining.