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可编程控制器在综采模型中的应用 被引量:3
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作者 黎云山 朱建东 《煤矿机械》 北大核心 2008年第5期169-171,共3页
杏花矿制作的综采工作面模型,形象地模拟了综采工作面的实际情况,只是工作面巷道和设备都按比例缩小。工作面设备按工作顺序,利用可编程控制器PLC施行自动控制,并还伴有语音提示功能和模拟瓦斯超限报警及瓦斯电闭锁功能。
关键词 综采工作面模型 自动控制 可编程控制器PLC 扩展单元 应用程序
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Theoretical analysis on the deformation characteristics of coal wall in a longwall top coal caving face 被引量:5
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作者 Bai Qingsheng Tu Shihao +1 位作者 Li Zhaoxin Tu Hongsheng 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第2期199-204,共6页
Against the background of analyzing coal wall stability in 14101 fully mechanized longwall top coal caving face in Majialiang coal mine,based on the torque equilibrium of the coal wall,shield support and the roof stra... Against the background of analyzing coal wall stability in 14101 fully mechanized longwall top coal caving face in Majialiang coal mine,based on the torque equilibrium of the coal wall,shield support and the roof strata,an elastic mechanics model was established to calculate the stress applied on the coal wall.The displacement method was used to obtain the stress and deformation distributions of the coal wall.This study also researched the influence of support resistance,protective pressure to the coal wall,fracture position of the main roof and mining height on the coal wall deformation.The following conclusions are drawn:(1) The shorter the distance from the longwall face,the greater the vertical compressive stress and horizontal tensile stress borne by the coal wall.The coal wall is prone to failure in the form of compressive-shear and tension;(2) With increasing support resistance,the revolution angle of the main roof decreases linearly.As the support resistance and protective force supplied by the face guard increases,the maximum deformation of the coal wall decreases linearly;(3) As the face approaches the fracture position of the main roof,coal wall horizontal deformation increases significantly,and the coal wall is prone to instability;and(4) The best mining height of 14101 longwall face is 3.0 m. 展开更多
关键词 Longwall top coal caving face Coal wall deformation Torque equilibrium Displacement method Parametric analysis
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Migration law of respirable dust on a super-long fully mechanized double-shearer working face
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作者 Jia Min Fu Yingpeng +3 位作者 Yuan Yong Wei Hongmin Sun Song Li Jie 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第6期1109-1115,共7页
In order to understand the migration law of respirable dust and gain reasonable design parameters for dust control on a super-long double-shearer fully mechanized working face, this paper describes research carried ou... In order to understand the migration law of respirable dust and gain reasonable design parameters for dust control on a super-long double-shearer fully mechanized working face, this paper describes research carried out using a numerical simulation package(Fluent) based on gas-solid coupling dispersed multiphase flow model and field measurement to research different technology modes, dust distribution law at different intervals where shearers work in opposite directions on the lower 9303 face, No. 2 Jining Mine,Yankuang Coal Mining Co. Results show that the concentration of dust 3–6 m away from the shearers working in the same directions was large, while the impact area of respirable dust near the shearer increased significantly to 5–6 m with the distance between two shearers working in opposite directions.The concentration of dust on a double-shearer face was considerably higher than that of a face with one shear under the combined effect of wind speed on the face and disturbed wind around the shearer, while the dust concentration near the shearer on the return side was considerably higher than that on the inlet side. The concentration of dust on a double-shearer face along the airflow declined slowly so that dust was hard to control. Simulation results confirmed the results of field measurement, which could provide reference for dust prevention design. 展开更多
关键词 Super-long working face Double-shearer Respirable dust Migration law Numerical simulation
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Mating model on production capacity for the system of cutting coal and drawing top-coal in FMMSC
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作者 翟新献 《Journal of Coal Science & Engineering(China)》 2007年第2期113-117,共5页
Being a safe and highly-efficient mining method, fully mechanized mining with sublevel caving (FMMSC) was extensively employed in Chinese coal mines with thick seam. In order to make drawing top-coal furthest to par... Being a safe and highly-efficient mining method, fully mechanized mining with sublevel caving (FMMSC) was extensively employed in Chinese coal mines with thick seam. In order to make drawing top-coal furthest to parallel work with shearer cutting coal, decrease failure ratio of rear scraper conveyor and increase safe production capacity of equipments, based on production technology, set up the mating model of safe production capacity of equipments for the system of drawing top-coal and shearer cutting coal in coal face with sublevel caving. It is mean capability of drawing top-coal adapted to the capability of shearer cutting coal in a working circle in the coal face that was deduced. The type selection of equipment of rear scraper conveyor can be tackled with this mating model. The model was applied in FMMSC in Yangcun Coal Mine, Yima Coal Group of China. With the mating light-equipments, the coal output in coal face attained 1.05 Mt in 2004. It gained better technical-economic benefit. 展开更多
关键词 coal mine coal face fully mechanized mining with sublevel caving (FMMSC) system of curing coal and drawing top-coal mating equipments
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