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	1. Study on the technology of reinforcing railway bridge in mining area
	WANG Changhao,ZHANG Wenquan
	Mine Engineering and Technology 19 July 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Underground mining in Shitun coal mine is affecting security operations of Pangzhuang railway bridge. Based on the specific situation of railway bridge，adopted the measure that padded the bridge by building bricks and then set lifting steel beams etc. to ensure its safe operation through data analysis and subsidence deformation prediction. Which has achieved economic and social benefits and provided scientific reference for the safe mining under railway bridge with the similar condition.
	TO cite this article:WANG Changhao,ZHANG Wenquan. Study on the technology of reinforcing railway bridge in mining area[OL].[19 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738664


	2. Damage Creep Analysis and Instability Delay Time of Ultrahigh pillar considering Initial Transverse Deformation
	FU Jianxin,SONG Weidong
	Mine Engineering and Technology 12 June 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:According to the ultrahigh pillar structure and mechanical characteristics, considering the initial geometric deviation caused by mining disturbance, the simplified model of the pressure bar is established. Based on elastic-plastic theory, the deflection and internal forces of ultrahigh pillar with initial geometric imperfections are analyzed and discussed. And based on the Kachanov theory of damage, the damage of ultrahigh pillar is analyzed, the damage failure time is calculated. The results show that under the influence of the initial deflection, pillar will appear different degree of additional deflection, which grows with the increase of initial deflection and pressure ratio. Analysis of engineering examples show that the start time of damage and instability of delay time of pillar has close relationship with initial deflection, pressure ratio and compressive strength. With the increase of pressure ratio and initial deflection, the damage incubation time and the instability of delay time quickly become small, the greater the compressive strength, the greater the instability of the delay time, which means that the pillar is more stable. The results of this study provide a theoretical basis for stability analysis and control of ultrahigh pillar.
	TO cite this article:FU Jianxin,SONG Weidong. Damage Creep Analysis and Instability Delay Time of Ultrahigh pillar considering Initial Transverse Deformation[OL].[12 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4696985


	3. Flotation seperation of low grade and complex rutile ore in Zaoyang and interaction of rutile with octyl hydroxamic acid
	WANG Jun,LIU Bei,CHENG hongwei,LI Kaiyun,QIN Wenqing,QIU Guanzhou
	Mine Engineering and Technology 19 March 2015
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	Abstract:The flotation separation of rutile ore in Zaoyang was investigated by raw ore experiments and pure mineral tests. The mechanism of rutile with octyl hydroxamic acid (OHA) as collector was further studied by Zeta potential measurement and Infrared spectrum measurement. Raw ore experiment results indicate that rutile can be recycled effectually by using C5~9 hydroxamic acid as collector. The rutile grading of flotation concentrate can reach to 43.25% with the recovery of 69.10%.The pure mineral tests indicate that octyl hydroxamic acid(OHA) is an effective collecter of rutile and andradite, and rutile can be activated remarkably by lead nitrate while andradite not. Sodium fluosilicate was found to be an effective selective depressor for andradite. Zeta potential measurements and Infrared spectrum measurements indicate chemisorption and physically absorption are occured on the surface of rutile with OHA and stable pentabasic chelate are formed.
	TO cite this article:WANG Jun,LIU Bei,CHENG hongwei, et al. Flotation seperation of low grade and complex rutile ore in Zaoyang and interaction of rutile with octyl hydroxamic acid[OL].[19 March 2015] http://en.paper.edu.cn/en_releasepaper/content/4634162


	4. Real-time analysis and online prediction of the process parameters in the process of a dense medium separation
	KUANG Yali,Wang Zhangguo,Ge Jun
	Mine Engineering and Technology 06 March 2014
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	Abstract:The process parameters of the dense medium separation used to be predicted in the design process of a coal preparation plant. The data calculated in a month synthesizing and detected by a detectors is only that after the event. A online prediction system for the process parameters of dense medium separation system were developed. The system could accomplish the calculation of coal preparation recovery rates and productivities in real-time, the prediction of the density composition of the feeded raw coal, the concentrate yield, the efficiency and the density of the dense medium separation on line. The achieved parametes could be transmitted to the control system as the given control limite index. The system has been used in the product line efficaciously.
	TO cite this article:KUANG Yali,Wang Zhangguo,Ge Jun. Real-time analysis and online prediction of the process parameters in the process of a dense medium separation[OL].[ 6 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4586986

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