4.5 Article

A Simulation Experimental Study on the Advance Support Mechanism of a Roadway Used with the Longwall Coal Mining Method

期刊

ENERGIES
卷 15, 期 4, 页码 -

出版社

MDPI
DOI: 10.3390/en15041366

关键词

longwall coal mining method; advance pressure influence range; characterization deformation; advance support mechanism

资金

  1. National Natural Science Foundation of China [52074164, 42077267]

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This paper focuses on the advance support problem for roadways used in longwall coal mining, with the S1202 working face of the Ningtiaota Coal Mine as the engineering background. Monitoring and analysis of bolt and anchor cable forces, as well as surrounding rock deformation, were conducted to establish a numerical model consistent with field conditions. Test results showed that under no advance passive support, the surrounding rock deformation in haulage and ventilation roadways still meets safety production requirements.
Aiming to advance a support problem for roadways used with the longwall coal mining method, the S1202 working face of the Ningtiaota Coal Mine is taken as the engineering background. The monitoring and analysis of bolt force, anchor cable force and surrounding rock deformation of two types of roadways within the whole advance pressure influence range are carried out in the present paper. Based on this, a numerical calculation model consistent with the field is established, and numerical comparison tests under different influencing factors are carried out. The rationality of the numerical test results is verified by using the field monitoring data. At the same time, quantitative evaluation indexes, such as characterization deformation, are established, and the deformation law of roadways surrounding rocks under different advance passive support forces is analyzed. The advance support mechanism of the roadway used with the longwall coal mining method is clarified. The test shows that under the condition of no advance passive support, the maximum characteristic deformation of surrounding rock in the haulage roadway and ventilation roadway is 7.1 cm and 10.1 cm, respectively. The above surrounding rock deformation still meets the requirements of on-site safety production. The research results can provide experimental support for the advance support parameters of the roadway used with the longwall coal mining method.

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