Narrow coal pillar retention and surrounding rock control technology for gob-side entry driving
In order to alleviate the tension of mining and excavation succession,improve roadway maintenance,and maximize the resource recycling rate,in view of the actual production conditions of Huacaotan Coal Mine,combined the limit balance theory and the principle of narrow coal pillar reservation,through theoretical calculation and numerical simulation(FLAC3D),the reasonable width of narrow coal pillar is determined to be 6 m.Through field research on the deformation characteristics of surrounding rock,mechanical analysis of surrounding rock,analysis on surrounding rock damage and frac-ture,and surrounding rock failure mechanism,the effect of part of support parameters on the distribution characteristics of support stress field in the 1109 mining roadway surrounding rock is analyzed based on the geological data and surrounding rock conditions of the 1109 working face of Huacaotan Mine.After on-site verifying and industrial tests,reasonable support pa-rameters are determined,and a reasonable support scheme for the way during the narrow coal pillar excavation is formulated.
roadway tunneling along goafnarrow coal pillarcoal pillar sizesurrounding rock controlsupport design
万方数据
维普
