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中国煤炭：英文版

中国煤炭：英文版

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  • 国内刊号/CN：11-3622/TD
    国际刊号/ISSN：1006-5318
  • 发行周期：半年刊
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  • 主管单位：中国煤炭工业协会
    主办单位：煤炭信息研究院
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中国煤炭：英文版 >2009年第4期
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  • 摘要：Available silicone was melted from coal gangue samples from Hancheng dig-gings through calcination, digestion, and other means. The best calcination temperature was determined from a range of 550～1 150 ℃; and the best time, from a range of 0.5～5h by colorimetry method. The proper ratio of coal gangue, limestone, sodium carbonate, and caustic soda was then determined through orthogonal experiment. The results show that the proper extraction condition for available silicone is the ratio of coal gangue, limestone, sodium carbonate, and caustic soda at 1:0.5:0.1:0.05, calcination temperature at 700℃, and calcination time at 2 h. In this condition, the available silicone content can be more than 19.65%.
  • 摘要：Briefly introduced the simple shear apparatus under high stress that was de-veloped from RMT. A series simple shear tests under high stress show that the relation curve between shear stress and tangential displacement under high normal stress is dif-ferent from the hyperbolic curve in direct shear tests, and the complete deformation proc-ess of interface under high stress can be described as nonlinear elastic-perfect plas-tic(NEPP). According to some characteristics of the fitting curve, the deficiency of the NEPP was pointed out. The mathematic "half value index" was used to illustrate that Weibull distribution with three parameters (WNEPP) can overcome the mathematical defi-ciencies of the NEPP. The advantage of the WNEPP is that the fitting curve of WNEPP more accurately coincided with the testing data was testified by further comparison.
  • 摘要：The basics of mining landslides were first summed up based on the analysis of actual materials by the application of mining subsidence and landslide theories. Further, the mechanism of along-layer landslide by mining was studied with the example of the Xiangshan mining landslide at Hancheng, Shaanxi Province. Meanwhile, the state of stress, and the mechanism of deformation and destruction of the Xiangshan mining slope were analyzed by the Finite Element Method.
  • 摘要：Based on the theory of geomechanics and using geologic analytical methods, analyed the fault characteristics, mechanical properties, displacement mode, tectonic sys-tem, structural pattern, activity mode of stress, tectonic activity, and tectonic evolution of the area of the Xiamen submarine tunnel, the strike NWW 295°, which is the main unfa-vorable geological structure that affects the safety of the tunnel construction; the macro geological prediction concludes that weathered troughs and groundwater-rich zones formed by its larger-scale fault fracture zones are the main unfavorable geological bodies provides a basis for preventing the geo-logical hazards in the tunnel construction.
  • 摘要：Adopted the distribution feedback type (DFB) laser to measure the coal mine gas methane, according to the methane located 1.6 lain nearby 2v3 with a R9 direct ab-sorption spectrum, attraction wire intensity of each line was calculated through the multi-line Voigt fitting. The experimental result indicates that in the obtained four attraction recover of wire, the maximum deviation is 2.7%, and the minimum deviation is 0.02%, other results are all in experimental error scope. This research method may apply in the spectrum survey methane gas density, it has characteristics including high precision, strong selectivity, fast response and so on.
  • 摘要：Shenfu coal was extracted with CS2, n-hexane, benzene sequentially. The ex-tracts were analyzed with GC/MS. It is presented that group seperation of soluble organic compounds in the coal can be achieved by fractionated extraction using different solvents. Main components in CS2 soluble fraction from Shenfu coal are alkyl-substituted arenes. Aliphatic hydrocarbons are overwhelmingly predominant in n-hexane-soluble fraction. Di-to tricyclic aramatic hydrocarbons are identified in benzene-soluble fraction. The molecular structures detection of 2, 4, 6-trichlorobenzenamine and 3, 3', 4, 4', 5, 5'-hexachloro-1, 1'-biphenyl and 2-chlorocyclohexanol firstly provide information for existence form of chlorine in coal.
  • 摘要：The period of the minerals resource construction items is very long, which af-fected largely by the changeable market. The discontinuance evalution theory and content of construction item about the resource used up and economic evalution theories of the invest were brought forward from the two aspects of the resource using value and the in-come rate.
  • 摘要：When the gas flow in the compact porous medium at low speed, it has slippage effect which is caused by the gas molecular collision whit the solidskeleton. Using the gas transfusion slippage effect at researching the coal bed transfusion rule, established the transfusion mathematical model of the coal bed which had considered the slippage effect. Observing the influence of the different toencircle presses, the different hole press and the different actual stress to the coal bed by using the three-axles permeameter. Thus sum-marized the transfusion rule of the coal bed. The experiment indicates that the bigger of the surrounding pressure, the more obvious of the slippage effect. At the same condition of axial pressure and the surrounding pressure, with the increase of the hole pressure, the coal permeability became bigger and then smaller. The coal body effective tress and the permeability curve nearly also has the same change tendency. Thus we can draws the conclusion that the transfusion of the gas in the coal bed generally has the slippage effect.
  • 摘要：The connection between blasting cost and comprehensive cost is the main concern. Some blasting effect factors (such as unit explosive consumption, uniformity of blockness, shape and porosity of blasting heap), which had an influence on electric shove loading efficiency, were analyzed. In the end a project to properly increase in blasting cost to decrease the comprehensive cost was put forward. At the same time, the hole-by-hole blasting is effective technology to improve blasting effect.
  • 摘要：Along with the increasing demand for coal and the great importance attached to mine safety, gaining the information of mine surface distortion timely has already become an urgent need to guarantee the safety of mine production. D-InSAR technology is a new measure which can provide the information of surface distortion in mining areas at centi-meter level through the processing of SAR image gained from radar satellite. In addition, this technology has the advantage of monitoring large areas with no weather limit. Intro-duced the basic principle and data processing steps of D-InSAR systematically and ac-quired the differential interferometry based on case study data. The advantages of D-InSAR and it's usability in monitoring mining subsidence in coal mining areas were proved.
  • 摘要：The return airway tunnel of bank 6 is an important tunnel for air return and auxiliary transportation. While under construction, the tunnel was seriously deformed, and the bottom was heavily squeezed. When completed, the bottom was smoothed out several times and a lot of maintenance were done. But about half year later, the tunnel collapsed. To counter the problems mentioned above, we systematically expounded our ideas and designed for solving the problem of the sustenance of the return airway tunnel of section 6.
  • 摘要：To solve the problem of excavation face dust control, the theory of dust removal after collection was put forward. Through a large number of theoretical and experimental researches, a new wind screen dust-collection system which was applied to comprehen-sive excavation face was developed. To set a wind dam in jet stream box, achieve the function of multi-stage and multiple-level regulation, lots of experimentation was carried out to obtain higher jet stream velocity with the minimum loss of energy. Experiments show that the slit width in the exports of wind screen dust-collection system should be 10 to 15 mm. For the general excavation roadway, after wind attenuation, the velocity can be greater than 3 m/s at the roof which meets the requirements of respirable dust control.
  • 摘要：A series of uniaxial-compression tests were conducted on some granite speci-mens. A multi-channel, high-speed AE signal acquiring and analyzing system was em-ployed to acquire and record the characteristics of AE events and demonstrate the tem-poral and spatial distribution of these events during the failure process. The test results show that in the primary stage, many low amplitude AE events are developed rapidly and distributed randomly throughout the entire specimens. In the second stage, the number of AE increases much slower than that in the first stage, while the amplitude of most AE events became greater. Contrarily to the primary stage, AE events clusteres in the middle area of the specimen and distributes vertically conformed to the orientation of compres-sion. The most distinct characteristic of this stage is a vacant gap formed approximately in the central part of the specimen. In the last stage, the number of AE events increases sharply and their magnitude increases accordingly. The final failure location coincidently inhabited the aforementioned gap. The main conclusion is that most macrocracks are de-veloped from the surrounding microcracks existed earlier and their positions occupy the earlier formed gaps, and the AE activity usually becomes quite acute before the main rup-ture occurs.
  • 摘要：The EVA-150 and starch were extruded by extruding press and the bio-degra-dation composite material was prepared to use as the controlled-release matrix of imazethapyr. The compatibility and crystallinity of EVA-150/starch blending were analyzed by SEM and DSC, and the controlled-released performance of imazethapyr in the carriers was also investigated by UV analysis. The results show that EVA-150/starch composite matrix has the obvious controlled-released function and the release rates of imazethapyr all exceed 50% in the environment of pH4, pH7, or pH9 after nine days.
  • 摘要：Analyzed and compared with some digitizeed mine build state first. Secondly analyzed opportunity and challenge that the Chinese mine faces, and pointed out certainty and necessity of building digitization of mine, Summarized the present task that charac-teristic, DM, MGIS of the digital mine develop and construct and employ finally, and carry on the summary to structure and function of the component mine integrated information system.
  • 摘要：In order to accurately test gas concentration and effectively pre-warning when the gas concentration over-limited on work face, used the high-performance and low prices SCM and the low-cost and high transfer efficiency bluetooth technology to forecast the gas concentration in real time. The data tested by SCM, then got the corresponding mathematical model of the data. Put forward the idea of using fuzzy structured element theory to dynamic forecast the gas concentration, analyzed the features in abnor-mal-effusing on work face and judge whether there was the possibility of abnormal gas-effusion. Simulation results show that mathematical model of this system about gas concentration is correct. This system changes coal mine monitoring system's traditional way of after-alarming into early-warning, and thus enhances its feasibility.
  • 摘要：Based on the basic theory description of 3S, and gave the example of dump of Hanzhou open-pit which belongs to Fuxin Mining Group, first of all, used the GPS tech-nology of static and RTK to get the three-dimensional position of the points in survey con-trol network and the topographic maps before and after the reclamation in reclamation area; used the technology of GPS RTK to calibrate the geometric elements designed in land reclamation, at the same time to get the actual coordinates of the design point after layout. Then, used RS technology to supervise systematically on land reclamation of min-ing area from the time to space; finally, used GIS technology to display 3-D visualization, analyze, manage, and enquire the date obtained by GPS and RS data, which can facilitate the decision decision-makers to plan land reclamation current and tong-term, and can be extended to other mines which have same or similar conditions.
  • 摘要：It took that the weight minimum and drive efficiency maximal were as double optimizing target, the optimization model had built the drilling string, and the optimization solution was used of the ant colony algorithm to find in progress. Adopted a two-layer search of the continuous space ant colony algorithm with overlapping or variation global ant search operation strategy and conjugated gradient partial ant search operation strat-egy. The experiment indicates that the spiral drill weight reduces 16.77% and transports the efficiency enhance 7.05% through the optimization design, the ant colony algorithm application on the spiral drill optimized design has provided the basis for the system re-search screw coal mine machine.
  • 摘要：A new experiment was made on the developing of bed separations and mining subsidence from Tangshan T2192 working face by equivalent materials simulation. The overburden deformation and the developing of bed separations with working face advanc-ing was simulated by a new model. The results show that the maximum value of bed separations moved forward gradually along with the working face advancing; the maxi-mum value of bed separations is 0.31 ~0.50 times of mining thickness. The key strata have a great influence upon surface subsidence during the overburden movement process. The mechanics parameters of new experiment are fitted with results in fields perfectly.
  • 摘要：Movement and deformation of underground rock include vertical dislocation and horizontal deformation, and the energy released by mine earthquake can be calculated basing on deformation energy. So put forwards the prediction for degree and spread of mine earthquake according to the underground rock's movement and deformation. The actual number of times and spread of mine earthquake on site were greatly identical to the prediction. The practice proves the possibility of prediction for mine earthquake basing on the analysis of underground rock's movement and deformation, and sets up new approach of mine earthquake prediction.
  • 摘要：Researched on the design and manufacturing of machine tool bed made by Steel-fibber Polymer Concrete(SFPC), which analyzed the static, dynamic and thermal performances of the bed. The results of study prove that machine tool bed made with SFPC is much more superiority than made in cast iron in dynamic and thermal perform-ances, and is more superiority then made in Polymer Concrete (PC) in static perform-ances. It can be concluded that the static, dynamic and thermal properties of machine tool can be improved by manufacturing machine tool bed with SFPC. Also SFPC machine tool bed posses some other advantages in the following: short development time, simple pro-duction process, reducing cost cost, saving energy, iron and steel.
  • 摘要：In order to understand the properties of impact toughness of coal at different impact speeds, and the change of impact toughness of lump coal to joint directivity of lump coal, a series of impact tests were conducted on Beijing Da'anshan Lump Coal at different impact speeds and in different impact direction. Through analyzing the test result, it is shown that the change of testing samples is similar when impact is exerted on the vertical bedding and the parallel bedding when the impulse is less than 20 Nos, and the difference increases with the impulse increasing when the impulse is more than 20 Nos. At the same time, the expanding energy of fracture in samples increases with its expanding speed, and the expanding energy of fracture has close relation with the impact direction of the tested samples. And the difference of impact toughness of lump coal produced by different im-pact direction increase with the impact speed. The fracture surface of lump coal when im-pact is exerted on the vertical bedding is smooth and the broken block number is fewer; but the fracture surface of lump coal when impact is exerted on the parallel bedding isn't smooth and the broken block number is more, which inflects impact toughness of coal is sensitive to some deficiency.
  • 摘要：It was mainly research on the causes, manifestations, and risk dodges of the industry risk selection, industry structure risk during the readjustment of the industrial structure and the establishment of the early-warning model of risk aversion.
  • 摘要：Because of the complexity and variability of the mine underground roadway, roadway is required to be dynamically generated in 3-1) display, viewpoint can be trans-formed to achieve the 3-D roaming effect, and can do interactive inquiries and positioning for the roadway. In terms of the requirements above, gave the comparatively detailed elaboration of the solution, using the open graphics library (OpenGL) and relying on VC++ 6.0 combined with Database Programming. Mainly establish the 31) model landscape of the underground roadway using OpenGL based on VC programming environment and MFC programming, elaborated the powerful 3D graphics library, i.e. OpenGL in detail, gave the algorithm which can realize the relative positioning and of arbitrary point and the roaming and so on in the mine roadway, and also solves illumination, turning, and other issues of the roadway model.
  • 摘要：During the fixed bed tube furnace combustion experimental study, stimulated the calcium-based sorbent grain size and microstructured influencing factors to explain the fluorine retention effect influence law, and expounded the combustion fluorine retention agent developing principle, and probed into the high-temperature fluorine retention agent technical approach. The results show that the calcium-based sorbent particle grain size and pore structure also have the bigger influence on the combustion fluorine retention ef-fect, and reducing the calcium-based sorbent particle grain size and improving the calcium sorbent structure characteristics at very high temperature to enhance the fluorine retention effect is the important approach to the fluorine retention agent development.
  • 摘要：The feasibility of the nozzle of self-excited oscillation pulsed jet (SEOPJ) as the breaker and loosing device for the air-lift pump was researched. The dynamic characteris-tics of the SEOPJ to crush the hard clay and loose the layer of ore deposit were explored experimentally under the submerged condition. The results show that the SEOPJ not only effectively breaks the hard clay or loose the particles of sand on the placer bed, but also produces fluctuating uplift force acting on particles of sand. The oscillating cross flow caused by the SEOPJ makes particles of sand move to the end of the suction pipe easily. Energy efficency of the airlift and concentration of the solids for the solid-liquid mixture sucked by the air-lift pump are increased obviously with the breaker of SEOPJ.
  • 摘要：Aiming at characteristics of underground engineering, analyzed the feasibility of Multidisciplinary Design Optimization (MDO) used in underground engineering, and put forward a modularization-based MDO method and the idea of MDO to resolve problems in stability analysis, proving the validity and feasibility of using MDO in underground engi-neering. Characteristics of uncertainty, complexity and nonlinear become bottle-neck to carry on underground engineering stability analysis by MDO. Therefore, the application of MDO in underground engineering stability analysis is still at a stage of exploration, which need some deep research.
  • 摘要：Based on experiment results and theoretical analysis, pointed out that the method of coal susceptibility to spontaneous combustion determination with fluid oxygen adsorption can not present the essence of coal oxidation process and oxidation reaction. The method is incorrect, paying attention at one aspect and ignoring the rest. The method is not reasonable for coal susceptibility to spontaneous combustion determination. Sus-ceptibility to spontaneous combustion of coal reflects chemical property of coal oxidation with oxygen absorption and heat release at low temperature. Coal's susceptibility to spon-taneous combustion is mainly decided by the number of molecules with reaction activation energy and activation molecule production rate at certain temperature. Therefore, index of susceptibility to spontaneous combustion should adopt accumulative value or trend of heat release or oxygen adsorption during oxidation process.
  • 摘要：For the study on the relationshfp between the dynamic phenomena in the min-ing such as mine earthquakes, outburst and faults slide, firstly, double shear friction ex-periments of sandstone were made, and its slide criterion was suggested considering the viewing of engineering. Secondly, in order to study the stability of underground rock and zone of tectonic stress field, based on the analysis on distribution characteristic of initial rock stress measurements, the geology structural model was built and tectonic stress field was made a back-analysis by applying finite element method. The calculating results fit with the analysis result of earthquakes mechanism and the distribution characteristic of the measurements. The high stress regional centers station locates discontinuous zone of I level faults and is corresponding to underground earthquakes scene. From then it is cer-tain that tectonic stress is the major origin and necessary condition of mine earthquakes. The instability slide of the faults is the main manifest and the mining activity is the leading factor. Beipiao fault has a dominate effect on other sub faults and tectonic stress area and is dynamical fountain of dynamic phenomena in the Beipiao Mines.
  • 摘要：According to the geological and mining technical conditions of No.18128 sub-level caving face with suspend-shift support, the first working face of the working area, the distribution laws of abutment pressure were studied by jointly employing FlAG3D numerical simulations and field tests. With the full consideration of these laws and the service time-limit of the mining district, the optimal location of the terminal mining line, should be 60 m away from the W4-B8 track dip, which was 20 m shorter than the 80 m distance deter-mined according to traditional experiences. The retained coal safety pillar for the protect-ing of dips, already proved by the industrial practice, can not only improve the rate of coal recovery and satisfy the subsequent service requirement for the following working faces, but also decrease the maintaining expenditure and thus increase profits.

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