DOI: 10.11799/ce201803018
Research on far field gas control technology for high cutting fully mechanized top-coal caving face in thick coal seam
SUN Zhen-ping
LI Jie
Abstract：In order to control the far field gas in fully mechanized caving face with large mining height of thicL coal seam, we taLe Tashan Mine 8214 worLing face as the research bacLground, and use"O"ring theory to analyze the gas flow characteristics in the goaf overburden fissures in the ground. It is found that the ground"L"type drilling hole is located in the far field gas enrichment zone. Therefore, ground"L"type drilling technology is applied to control the gas in far field. The variation law of gas concentration before and after far field gas drainage in ground"L"drilling was analyzed and compared. The results show that, after the implementation of"L"drilling, the gas concentration in roof roadway is obviously decreased, and the gas concentration in roof roadway tends to be gentle, modest, basically maintaining at about 2.5%. Therefore, the ground"L"type drilling well shared the pressure of roof roadway drainage, and protect the mine's safety in production.
Keywords：thicL coal seamlarge mining heightsublevel caving face"O"type circle theoryfar field gasground"L"type drilling
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 67-70 )