留小煤柱沿空掘巷锚网支护试验研究

Test Research on Roofbolt Grid Support with Setting up Small Coal Pillar on Developing Road

为确定2#煤层锚网支护条件下沿空掘巷煤柱大小,在井下进行3 m、5 m、7 m宽度条件下的锚网支护试验,通过对各宽度煤柱条件下采掘活动对巷道顶板下沉、两帮位移及锚杆锚固力影响的观测分析,确定合理的煤柱宽度为3 m,节约了煤炭资源,为矿井的安全开采提供了技术保障.

For determining the width of coal pillar along the developing road of No2 Coal Seam with support of roof bolt grid,the tests of roof bolt grid support have been carried out with width range of pillars from 3m,5m to 7m,and observation and analysis of develop movement to roof separate level sink,two sides displacement and roof bolt bolting force impact have been taken on each range of pillar.As a result,3m width range of pillar is reasonable as a purpose of saving coal resource and offering technical safety of coal mining.