Dust Control Technology in Dry Directional Drilling in Soft and Broken Coal Seams

Dongmei Wu, Jie Gao and Ke Lu
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Dongmei Wu: Yongcheng Vocational College, Yongcheng 476600, China
Jie Gao: State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
Ke Lu: CCTEG Chongqing Research Institute, Chongqing 400037, China

Energies, 2022, vol. 15, issue 10, 1-11

Abstract: High rate of dust generation and serious dust diffusion in dry directional drilling in soft and broken coal seams (SBCS) have long been critical problems in the mining process. To solve these problems, in this study, a dust hood was designed and applied to realize non-contact dust control in drilling holes. The optimal performance of the dust hood was achieved when different technical parameters, including the gap width between the dust hood and the drill pipe, the air-slot width of the sealing device, the slag discharge pressure, and the air curtain pressure were controlled at 2 mm, 0.2 mm, 0.3 MPa, and 0.5 MPa, respectively. As a result, the dust concentration was reduced from 540 mg/m 3 to 15 mg/m 3 , with dust control efficiency reaching 97.2%. The in situ test results confirmed good dust control effects, as the dust control efficiency reached 98.3% after using the dust hood.

Keywords: coal dust; dust concentration; dry drilling; dust diffusion; dust hood; dust hazard; dust control system; gas extraction borehole; parameter optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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