金屬(shu)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)是用于煤(mei)(mei)(mei)礦(kuang)采煤(mei)(mei)(mei)工作(zuo)面(mian)(mian)(mian)、位(wei)于單(dan)體液壓(ya)支(zhi)(zhi)柱(zhu)之(zhi)上(shang)頂(ding)(ding)(ding)(ding)(ding)(ding)板(ban)(ban)(ban)之(zhi)下、傳遞(di)頂(ding)(ding)(ding)(ding)(ding)(ding)板(ban)(ban)(ban)壓(ya)力的(de)支(zhi)(zhi)撐(cheng)梁(liang)(liang)(liang)。是煤(mei)(mei)(mei)礦(kuang)采煤(mei)(mei)(mei)工作(zuo)面(mian)(mian)(mian)支(zhi)(zhi)護(hu)(hu)(hu)項板(ban)(ban)(ban)用的(de)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)。按連接(jie)方(fang)式(shi)金屬(shu)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)可(ke)分為(wei)鉸(jiao)(jiao)接(jie)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)和非鉸(jiao)(jiao)接(jie)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)兩種。按頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)梁(liang)(liang)(liang)體截面(mian)(mian)(mian)形狀(zhuang)金屬(shu)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)可(ke)分為(wei)A型(xing)、B型(xing)、C型(xing)、D型(xing)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)四種。金屬(shu)頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)可(ke)與(yu)各種類型(xing)單(dan)體金屬(shu)支(zhi)(zhi)柱(zhu)配合組成金屬(shu)支(zhi)(zhi)架，供煤(mei)(mei)(mei)礦(kuang)在水平及(ji)緩傾斜回(hui)采工作(zuo)面(mian)(mian)(mian)支(zhi)(zhi)護(hu)(hu)(hu)的(de)一種高強度頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)由于這種頂(ding)(ding)(ding)(ding)(ding)(ding)梁(liang)(liang)(liang)能懸壁支(zhi)(zhi)護(hu)(hu)(hu)工作(zuo)面(mian)(mian)(mian)，煤(mei)(mei)(mei)壁面(mian)(mian)(mian)前(qian)邊的(de)運輸機道上(shang)面(mian)(mian)(mian)的(de)頂(ding)(ding)(ding)(ding)(ding)(ding)板(ban)(ban)(ban)，使煤(mei)(mei)(mei)壁與(yu)支(zhi)(zhi)柱(zhu)間(jian)有較大的(de)支(zhi)(zhi)護(hu)(hu)(hu)空間(jian)。