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| 1 | A new design of foaming agent mixing device for a pneumatic foaming system used for mine dust suppression显示文摘To overcome the drawbacks of the conventional foam technology used for dust suppression,including large pressure loss,high water pressure and low driving pressure,a new pneumatic foaming system is introduced.Then an original design of foaming agent mixing device is proposed,and its performance is investigated and evaluated under different pressure compensations.Experimental results show that the maximum absorption amount increases by 2.9-6.7 times at a pressure compensation of 0.04-0.2 MPa compared with no pressure compensation.The pressure loss and pressure fluctuation both reduce significantly with increasing pressure compensation.The critical outlet pressure increases by30.4-240%.Field application indicates that the proposed mixing device ensures the reliable addition of foaming agent used for foam dust suppression.The effect of foam on dust suppression is remarkable,and the economic cost of foam is low.Therefore,there is reason to believe that the new mixing device will greatly promote foam technology to be widely used for suppressing dust in underground coal mines. | Wang Deming Lu Xinxiao Wang Hetang Chen Mingjie | 2016 | International Journal of Mining Science and Technology2016，26，2： | 7 |
| 2 | Application of foam to suppress rock dust in a large cross-section rock roadway driven with roadheader显示文摘 | Hetang Wang Deming Wang Wanxing Ren Xinxiao Lu Fangwei Han Yikun Zhang | 2013 | Advanced Powder Technology2013，，1： | 1 |
| 3 | Experimental investigations on the performance of a new design of foaming agent adding device used for dust control in underground coal mines显示文摘 | Hetang Wang Deming Wang Xinxiao Lu Qingcong Gao Wanxing Ren Yikun Zhang | 2012 | Journal of Loss Prevention in the Process Industries2012，，6： | 1 |
| 4 | Experimental investigation of the performance of a novel foam generator for dust suppression in underground coal mines显示文摘 | Hetang Wang Deming Wang Yan Tang | 2014 | Advanced Powder Technology2014，，25： | 1 |
| 5 | Application of foam to suppress rock dust in a large cross-section rock roadway driven with roadheader显示文摘 | Hetang Wang Deming Wang Wanxing Ren | 2013 | Advanced Powder Technology2013，，24： | 1 |
| 6 | Exploration on molecular dynamics simulation methods of microscopic wetting process for coal dust显示文摘Wet dust removal is one of the main technical measures in coal dust control,and coal dust wetting is the key factor to determine the effect of wet dust removal.In order to explore the micro-wetting process of coal dust,this paper uses molecular dynamics simulation to study the micro-wetting process of coal dust in different simulation conditions.The molecular dynamics simulation was carried out under different ensemble,thermodynamic states as well as relaxation pretreatment methods,then the H_(2)O molecular layer and coal dust molecular layer in each simulation were quantitatively analyzed by relative concentration.The research results show that a method for establishing molecular model of lignite is proposed and the 2D periodic surface structure is more reasonable.The surface system of coal-H_(2)O molecule is established by NVT aeration method,where the simulation result is close to the actual coal dust wetting process.The simulation effect of medium and large coal dust-H_(2)O molecular system is better than that of small coal dust-H_(2)O molecular system.This study provides a new solution for changing the empirical method of molecular dynamics simulation of coal system wetting and oversimplification of coal system. | Qi Zhang Xinyi Chen Hetang Wang Chaohang Xu | 2021 | International Journal of Coal Science & Technology2021，8，2： | 0 |
| 7 | Investigations of the effects of two typical jet crushing methods on the atomization and dust reduction performance of nozzles显示文摘Single-fuid nozzles and dual-fuid nozzles are the two typical jet crushing methods used in spray dust reduction. To distinguish the atomization mechanism of single-fuid and dual-fuid nozzles and improve dust control efciency at the coal mining faces, the atomization characteristics and dust reduction performance of the two nozzles were quantitatively compared. Results of experiments show that, as water supply pressure increased, the atomization angle of the swirl pressure nozzle reaches a maximum of 62° at 6 MPa and then decreases, but its droplet size shows an opposite trend with a minimum of 41.7 μm. The water supply pressure helps to improve the droplet size and the atomization angle of the internal mixing air–liquid nozzle, while the air supply pressure has a suppressive efect for them. When the water supply pressure is 0.2 MPa and the air supply pressure reaches 0.4 MPa, the nozzle obtains the smallest droplet size which is 10% smaller than the swirl pressure nozzle. Combined with the dust reduction experimental results, when the water consumption at the working surface is not limited, using the swirl pressure nozzle will achieve a better dust reduction efect. However, the internal mixing air–liquid nozzle can achieve better and more economical dust reduction performance in working environments where water consumption is limited. | Han Han Hetang Wang Qi Zhang Yunhe Du Haojie Wang Hui Wang | 2023 | International Journal of Coal Science & Technology2023，10，4： | 0 |
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