Opencast Mining Technology

Research of vertical mining to local horizontal mining in open-pit coal mine

LIU Jingyu, WANG Zhaogang

2016, 31(2): 1-3.

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Abstract： Taking Baiyinhua No.2 Open-pit Mine as an example, the article introduces vertical mining form, and analyzes the optimization transformation of transportation system, which has a certain reference significance to the open-pit mines with similar production condition.

Research on Yinwan dump landslide in Heidaigou Open-pit Coal Mine

YAO Jianhua

2016, 31(2): 4-8.

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Abstract: According to the problems of emerging a large number of cracks in Yinwan dump and occurring landslide in local region, the author investigates the cracks distribution rule of dump and analyzes the monitoring data. On the basis of data, the article uses limit equilibrium theory and numerical simulation method to analyze the slope damage mechanism and slope effect in potential landslide area.

Effect of non-linear slope curvature contained angle on its stability

XUE Kaixi, HU Yanxiang, ZHAO Baoyun, WEI Yongqi, GU Liangsheng, CHENG Lihong

2016, 31(2): 9-12.

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Abstract: Taking the typical red-clay slope in Jiangxi province as the research object, by constructing FLAC computing model base on fast Lagrangian method, the article analyzes the law of slope safe factor, plastic zone distribution and velocity displacement field with the change of curvature contained angle under the non-linear slope condition.

Research on mining scale in Yimin No. 3 Open-pit Coal Mine

SU Qianjun

2016, 31(2): 13-16.

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Abstract：According to the basic construction condition and coal market in Yimin No.3 Open-pit Coal Mine, the article comprehensively analyzes mining technology, equipment selection, the whole technology arrangement, other auxiliary project and energy consumption in different mining scales schemes. Through comparing with the total investment, financial internal rate of return, production cost and other economic indicators of each scheme, the author concludes that No.3 Open-pit Mine can get the best profitability when the design scale is at 10.0 Mt/a and 15.0 Mt/a.

Crushing station protection scheme in Tianchi Energy South Open-pit Coal Mine

GUO Haijun, WANG Jun, CAO Fangzhi

2016, 31(2): 17-20.

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Abstract: Through researching the crushing station engineering geological conditions in South Open-pit Coal Mine, combining with semi-continuous mining technology, the article presents three kinds of protective measures, such as safety protection coal pillar, anti-slide pile, crushing station moving set, and carries out comprehensive comparison on three kinds of protective measures, and finally determines protective measures in accord with the actual situation of mine.

Measures of increasing the benefit in Pingshuo East Open-pit Mine

LIU Guo, FAN Duoshui, SI Wanyou, LU Qingchao

2016, 31(2): 21-23.

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Abstract: In order to reduce production cost and improve economic benefit, this article researches the measures of reducing cost from the optimization of transportation system and internal dump discharging aspects, and the methods of improving the enterprise benefit from the recovery mining pressure coal quantity, 5# coal and the goaf coal mining aspect, which can make the economic benefit and social benefit of mine to achieve the maximum.

Ways of improving production capacity of railway transportation in open-pit mine

SUN Peng, ZHAO Yingtuo, LI Dongsheng, DOU Ziyu, BAO Yan

2016, 31(2): 24-26.

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Abstract: Taking Fushun East Open-pit Mine as research object, the article analyzes the change of mining condition with the increase of mining depth in open-pit mine. According to the factors of affecting the production capacity of railway transportation, the author presents some measures to increase the production capacity, which provides the basis for the development of railway transportation in open-pit mine.

Open-pit mining mixed explosive wave blasting technology

WANG Hua, WANG Jianxin, GUO Qingchuan

2016, 31(2): 27-29.

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Abstract: In open-pit mining, blasting parameters are formulated according to the whole mining lithology distribution. According to the design parameters to blast, after blasting, it will cause the phenomenon of high block rate and pulling low, which causes serious effect on the mining progress of mine. According to the phenomenon of large block pulling low in Nalinmiao disaster control engineer, the mine carries out blasting parameter optimization and innovation.

Application of high density direct current method in goaf exploration of Pingshuo East Open-pit Mine

DUAN Lishi

2016, 31(2): 30-32.

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Abstract: In order to ascertain the distribution range of goaf, the East Open-pit Mine and China Coal Research Institute explore the goaf under the flat plate using high density direct current method, which effectively controls goaf range and ensures safety production and normal advance in the mine.

Application of small mining transportation equipment in large open-pit mine stripping aspect

CAI Jun

2016, 31(2): 33-36.

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Abstract: Under the condition of not increasing equipments, Lala copper mine introduces small mining transportation equipment as the supplement of stripping production capacity. Small mining transportation equipment has completed a large number of stripping work every year. Practice proves that small mining transportation equipment can complete the stripping work of large mine very well.

Application of transient electromagnetic method in Pingshuo East Open-pit Mine goaf exploration

HAN Jin, DUAN Lishi, XU Jun, WANG Shengyang

2016, 31(2): 37-40.

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Abstract： The collapse of goaf, high temperature of spontaneous combustion and a large volume of toxic gas cause the potential safe problems. In order to ensure the normal production and the safe of staff and equipment, the East Open-pit Coal Mine and China Coal Science and Technology Institute cooperate to explore goaf using transient electromagnetic method and achieve good results.

Optimization on end slope bridge shift scheme in Ha'erwusu Open-pit Coal Mine

ZHANG Liang, HAN Zhanzhan, LUO Huaiting

2016, 31(2): 41-44.

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Abstract: Based on the shift of north end slope dumping bridge in Ha'erwusu Open-pit Coal Mine, the article elaborates the shift cycle and procedure of end slope bridge and construction details, which can alleviate the tense unfavorable situation of open-pit mine expansion period steering dump space, shorten truck transportation distance of stripping bench above coal roof and increase resource recovery ratio and reduce production cost.

Analysis and calculation of belt conveyor with convex arc radius

LIU Bing

2016, 31(2): 45-47.

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Abstract：Belt conveyor often emerges the convex arc turning point in the process of layout. The article determines the reasonable relationship between curvature radius of convex arc and roller space, which has great significance to smoothly running of belt conveyor.

Application of CORS system in slope monitoring of Weijiamao Open-pit Coal Mine

XIANG Di, ZHANG Yonggui, ZHANGLe, LIU Jie, WANG Jinlong, LV Xuan

2016, 31(2): 48-51.

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Abstract: The article analyzes the significance of slope monitoring, introduces the geological situation of Weijiamao Open-pit Coal Mine, elaborates the basic principles of CORS system, and verifies the measurement accuracy of CORS system. Through the application of specific slope monitoring in Weijiamao Open-pit Coal Mine, results show that the slope monitoring data using CORS system is accurate and reliable, which can effectively observe the slope displacement to prevent the slope landslide.

Analysis on ANSYS reducer output shaft structure

XU Jianjun

2016, 31(2): 52-55.

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Abstract：Taking the reducer output shaft as research object, the author analyzes the output shaft structure under torsion moment. According to the driving system equipped with motor, the company selects the most suitable reducer，so as to achieve the rational use and optimization of resources.

Calculation of internal and external displacement using triangular net method in Shenghua Beidian Shengli No.1 Open-pit Coal Mine

LIN Lin

2016, 31(2): 56-58.

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Abstract：According to the geological condition in Shenghua Beidian Shengli No.1 Open-pit Coal Mine, using triangular net method to build model, the mine carries out the special treatment on fault and collapse column especial stratum, calculates internal and external displacement, and determines the stripping volume according to several different mining locations.

Material management information system in Inner Mongolia Baoli Coal Company

PANG Zhiqiang, WANG Nan

2016, 31(2): 59-61.

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Abstract: Material management information system in Inner Mongolia Baoli Coal Mine keeps pace with the current science, which is convenient for the work of personnel, statisticians and warehouse managers and improves efficiency. The article introduces the overall design and field application effect of the system.

Research and design of semi-mobile crushing station silo in open-pit mine

SONG Bo

2016, 31(2): 62-65.

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Abstract：Taking 3 000 t/h coal system semi-mobile crushing station and 9 000 t/h stripping system semi-mobile crushing station for example, through setting technology parameters, the article discussed the effective volume calculation method of silo under the two kinds of production capacity, and calculated the reasonable silo volume. The author had a three-dimensional model simulation on 3 000 t/h coal system semi-mobile crushing station silo to determine the contour structure size of the silo, and had a description on the arrangement form of silo structure.

Feasibility analysis on domestic alternative for lubricating oil in Shengli East No.2 Mine

LU Guoxi

2016, 31(2): 66-69.

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Abstract: This article analyzes and compares the chemical composition of imported engine oil, hydraulic oil, gear oil and lubricating oil, and makes the comparative analysis. The results show that domestic lubricating oil can replace the imported lubricating oil, which can reduce the equipment maintenance cost.

Electrical design of 110kV substation in Open-pit Mine

CHI Qiuxia

2016, 31(2): 70-73.

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Abstract: 110 kV substation is built by stage. Electrical design of substations mainly include location, layout, mode of wiring, electrical equipment selection, transformer load rate and guarantee rate, capacitive current calculation, short circuit calculation and electrical equipment calibration.

Research on ecological reconstruction technology in Shengli East No.2 Open-pit Coal Mine dump

DIAO Lifu

2016, 31(2): 74-77.

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Abstract: Through researching the species composition and the number features of the growing artificial reconstruction ecosystem after land reclamation, the article discusses the establishing way on the artificial reconstruction system of reasonable structure and stable function which is suitable for grassland area dump in open-pit mine, and provides the theoretical basis for it, which provide the experience for ecological reconstruction work under the similar natural conditions.

Environmental pollution and prevention measures in the production process of Pingshuo East Open-pit Mine

LIU Yonggang, CAI Guangqi, HAN Jin

2016, 31(2): 78-81.

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Abstract: This article introduces the ecological environmental pollution problems in the production process of East Open-pit Mine, and made the control measures according to each factor, which plays a positive role on the recovery of ecological environment in East Open-pit Mine.

Water treatment design in Baoming oil shale open-pit mine

JIA Zhenzhen

2016, 31(2): 82-85.

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Abstract： The article introduces the technological process of washing wastewater and sewage treatment, design calculation of each building and equipment selection. Through treatment, standard water is used to flush, sprinkle the outdoor ground and green water in spring and summer.

Analysis of coal contamination factors and coal quality control technology in Dananhu No.2 Mine

ZHANG Guangchao, LIU Yong, ZHANG Jiwei, LI Chao

2016, 31(2): 86-89.

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Abstract：In order to reduce the contamination of Dananhu No.2 Mine coal on power plant boiler, the mine analyzes the main reasons of coal contamination by sampling and testing. Using the testing data of coal sample, the relevant data of geological exploration report, the article researches the sodium oxide content change trend in raw coal, analyzes the relationship between raw coal ash content and sodium oxide, researches the function relation between ash content and sodium oxide, and compares the sodium oxide content of coal and waste rock. The author presents the corresponding coal quality control technology from production process and design.

Safety risk pre-control management from the point of view of Broken Windows theory

LI Lanbo

2016, 31(2): 90-93.

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Abstract: This article analyzes the present safety status of coal mine, using the Broken Window theory, and elaborates the measures of safety risk pre-control management encountering serious broken window、general broken window、light broken window three stages in the process of actual work. The author researches the different management methods in different management stages, in order to do safety management work well.

Main factors of influencing construction cost in coal industry project decision-making stage

SHI Rong

2016, 31(2): 94-96.

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Abstract：Combining the present situation and specific case of coal industry，the article discusses several main factors of influencing project construction cost in coal industry project decision-making stage from coal mine project construction scale, selection of coal field, production process and equipment selection, overall engineering and environmental protection measures aspects.

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