Technology of Gob-side Entry Retaining in Steep Soft Outburst Coal Seam
Through the establishment of a mechanical model of stope structure, the scope of internal stress field was forecasted, and the width of the coal pier in gob-side entry retaining was determined based on this. Aim at the seven stages of surrounding rock deformation in gob-side entry retaining, the supporting measures of gob-side entry retaining which is based on the dynamic of stratum was taken to design the control of surrounding rock in different roadways. Especially for the features of the violent deformation of surrounding rock and the extremely soft characteristic of coal pier coal which appeared in the process of gob-side entry retaining in the rear area of upper section working face, in order to prevent the coal pier from being crushed and becoming instability in the process of sinking and bending of the rear rock beam, a technology of roadway protection called ‘intensive roadside bolting system’ was used. Practice has proved that it meets the safety of transportation, walking and ventilation. Gob-side entry retaining achieved technically feasible, safe reliable, economically rational effect.
Yongkui Shi Hu Yuan Huanming Wang
College of Natural Resource and Environment Engineering, Shandong University of Science and Technolo Liziya’nan Colliery, Guangneng Group Co., Guangyuan, China
国际会议
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
合肥
英文
91-95
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）