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操作掩護式液壓支架平衡千斤頂時的注意事項

作者:煤礦安全網 2013-10-24 16:06 來源:煤礦安全網

操作掩護式液壓支架平衡千斤頂時的注意事項
1老頂來壓時,應向平衡千斤頂供液,使支架頂梁受拉,這時支架外載合力作用點后移,增強支架的切頂能力。2在中等穩定以下頂板或直接頂較松軟的工作面使用,端面頂板需要加固時,應向平衡千斤頂活塞桿的活塞腔供液,這時,支架外載合力作用點前移,有利于頂梁端部對端面頂板的維護。3在松軟底板的工作面,直接頂體少的條件下,向平衡千斤頂活塞供液,使頂梁受控,支架外載合力作用點后移,減少支架頂底板比壓,可避免支架前部陷入底板,對移架造成困難。

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