液壓伸縮(suo)式活動(dong)模(mo)(mo)板(ban)(ban)是(shi)在井筒混(hun)(hun)合作業時,隨工作面前(qian)進自上而下現(xian)澆混(hun)(hun)凝土時使(shi)用的(de)一種(zhong)(zhong)整體移動(dong)模(mo)(mo)板(ban)(ban),它(ta)是(shi)我國各種(zhong)(zhong)活動(dong)模(mo)(mo)板(ban)(ban)中使(shi)用的(de)最多(duo)的(de)一種(zhong)(zhong),這(zhe)種(zhong)(zhong)模(mo)(mo)板(ban)(ban)的(de)基本(ben)構造是(shi):在井筒全部圓周上,模(mo)(mo)板(ban)(ban)分為(wei)2~3大(da)塊(kuai),大(da)塊(kuai)之間留有伸縮(suo)縫(feng),依靠(kao)某種(zhong)(zhong)機構使(shi)伸縮(suo)縫(feng)伸縮(suo)以達到模(mo)(mo)板(ban)(ban)的(de)撐開和收攏。