Study on Influence of Caving Zone Height of Overburden Strata upon Gas Drainage Effect by High Level Boreholes
HUANG Senlin
Abstract：The mine gas emission rate raises with the deepening of the mining level and the increase of mining intensity in Jiaoping Coal Mining Area, in this case, the gas drainage effect in fully mechanized caving face by high-level boreholes became very important to gas control and the gas drainage effect depended on the determination of the caving zone height of the overburden strata. For this purpose, study was made on the caving zone height and gas drainage effect in 4-2 seam fully mechanized caving face in Xiashijie Mine. By taking the mining of No. 15 fully mechanized caving face of the mine as the engineering background and using the combined method of the field measurement, theoretical analysis and on-site gas drainage comparative test, the prediction formula for the caving zone height of 4-2 seam was derived and the caving zone height of No. 15 fully mechanized caving face was determined as 60. 9m, all of those provided reliable technical data for the parameter design of the high-level boreholes.
Keywords：caving zone heighthigh-level boreholefield measurementprediction formulagas drainage effect
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 15-18 )