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目前,国内绝大多数煤矿在分层开采时,选用10~#铅丝编织的经纬网做假顶材料。潞安矿务局王庄矿,根据出国考察人员带回的讯息,曾经用8~#铅丝试制了菱形网,并且,经过承力试验后认为,菱形网比经纬网的承力性能优越。 菱形网是否确实比经纬网承力性强?编金属网选用几号铅丝以及网孔多大会影响网的承力性能吗?探索网的受力情况,提出最优网的结构参数,必将对大量采用金属网作假顶材料的矿井,带来不可忽视的巨大技术和经济效益。 一、经纬网丝受力分析
At present, the vast majority of domestic coal mines in the stratified mining, the selection of 10 ~ # wire braid Jingwei network false top material. Lu’an Mining Bureau Wangzhuang mine, according to the information returned by inspectors abroad, once with 8 ~ # lead trial trial diamond network, and after bearing test that the diamond network than the latitude and longitude network bearing capacity superior. Diamond mesh is indeed stronger than the warp and weft force? Brass wire mesh selection and how many will affect the performance of the network? To explore the force of the network, the optimal network structure parameters proposed, will A large number of metal mesh for the fake material of the mine, brought huge technical and economic benefits can not be ignored. First, the Jingwei mesh force analysis