Application of foam to suppress rock dust in a large cross-section rock roadway driven with roadheader

Wang, Hetang; Wang, Biao; Ren, Wanxing; Lu, Xinxiao; Fang-wei, Han; Zhang, Yikun

doi:10.1016/j.apt.2012.06.012

Cited by 91 publications

(29 citation statements)

References 4 publications

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“…Zeng increased the dust-proof to 91% by using the complex wetting agent in the industrial experiment of tunneling faces [17]. After Chongqing Coal Research Institute applied the high-productivity dusting wetting agent to Yangquan Xinjing coal mine, the dust-proof efficiency increased 43.1% compared with the ordinary method of sprinkling water, which markedly improved http working the environment at mining faces [18]. Huainan synthetic materials plant imported dust-proof agent from the American Wen-Don company, developed DA-85 dust-proof agent, and applied it to the tunneling face in Gushuyuan coal mine and Pingdingshan I coal mine.…”

Section: Introductionmentioning

confidence: 99%

Application study on complex wetting agent for dust-proof after gas drainage by outburst seams in coal mines

Wang

et al. 2016

International Journal of Mining Science and Technology

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Section: Introductionmentioning

confidence: 99%

Application study on complex wetting agent for dust-proof after gas drainage by outburst seams in coal mines

Wang

et al. 2016

International Journal of Mining Science and Technology

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“…However, foam expansion ratio is useful for comparing different foam agents. It was found through previous studies and verified by these laboratory experiments that foams with higher expansion ratios were “drier” foams (Schwendeman et al, 1972; Wang et al, 2013). …”

Section: Important Foam Generation Propertiesmentioning

confidence: 53%

“…Expansion ratios above 30 were too dry to penetrate the dust source. Expansion ratios of 20 or below were found to use too much water (Wang et al, 2013). …”

Section: Past Foam Studiesmentioning

confidence: 99%

Foam property tests to evaluate the potential for longwall shield dust control

et al. 2018

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Tests were conducted to determine properties of four foam agents for their potential use in longwall mining dust control. Foam has been tried in underground mining in the past for dust control and is currently being reconsidered for use in underground coal longwall operations in order to help those operations comply with the Mine Safety and Health Administration’s lower coal mine respirable dust standard of 1.5 mg/m3. Foams were generated using two different methods. One method used compressed air and water pressure to generate foam, while the other method used low-pressure air generated by a blower and water pressure using a foam generator developed by the U.S. National Institute for Occupational Safety and Health. Foam property tests, consisting of a foam expansion ratio test and a water drainage test, were conducted to classify foams. Compressed-air-generated foams tended to have low expansion ratios, from 10 to 19, with high water drainage. Blower-air-generated foams had higher foam expansion ratios, from 30 to 60, with lower water drainage. Foams produced within these ranges of expansion ratios are stable and potentially suitable for dust control. The test results eliminated two foam agents for future testing because they had poor expansion ratios. The remaining two foam agents seem to have properties adequate for dust control. These material property tests can be used to classify foams for their potential use in longwall mining dust control.

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“…This technology with high dust suppression efficiency and less water consumption has been applied in coal mining in more than 10 countries around the world [1][2][3]. Lots of scholars and research institutions have studied on this technology [4,5]. However, the further development and application of DSF were severely restricted due to the high adding proportion of foaming agent and system complexity in past decades [6].…”

Section: Introductionmentioning

confidence: 99%

A New Design of Double-Stage Parallel Adding Equipment Used for Dust Suppression in Underground Coal Mines

Wang

Shen

et al. 2014

Arab J Sci Eng

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In order to solve the problems of conventional single-stage adding equipment, such as high adding proportion, easy to generate cavitation, large pressure loss and low pressure ratio, an original design of double-stage parallel adding equipment is proposed. Its performance is investigated experimentally under different working flow and outlet pressure and compared with the single-stage jet equipment. Testing results show that the adding proportion of doublestage parallel adding equipment is less than that of the singlestage one, and the cavitation flow is higher. The new equipment can decrease pressure loss, inlet pressure and improve pressure ratio, which lowers the energy loss of adding equipment and raises its driving ability in application. An adding proportion of 4.6 0 / 00 and an outlet pressure of 0.16-0.18 MPa were realized when the double-stage parallel adding equipment was used to add foaming agent for dust suppression with foam (DSF). The marked reduction in the adding proportion of foaming agent significantly reduces foam production cost. Therefore, it is believed that the study would lay an important foundation for the widespread application of DSF in underground coal mines.

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Application of foam to suppress rock dust in a large cross-section rock roadway driven with roadheader

Cited by 91 publications

References 4 publications

Application study on complex wetting agent for dust-proof after gas drainage by outburst seams in coal mines

Application study on complex wetting agent for dust-proof after gas drainage by outburst seams in coal mines

Foam property tests to evaluate the potential for longwall shield dust control

A New Design of Double-Stage Parallel Adding Equipment Used for Dust Suppression in Underground Coal Mines

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