云南省田坝煤矿几年来在农村木排架结构房屋下进行了采煤试验,共采出煤炭50多万吨,地表最大下沉达2400毫米。房屋采前未加固,开采期间照常使用,采后局部维修。吨煤成本增加0.15元,取得较好的技术经济效果。一、采区地质开采条件和房屋结构特征村庄下采煤的开采技术条件见表1, In recent years, Tianba Coal Mine in Yunnan Province has carried out coal mining tests under rural wooden frame structures. Over 500,000 tons of coal have been mined and the maximum surface subsidence has reached 2,400 mm. Housing is not harvested before mining, mining period as usual, post-harvest local maintenance. Tons of coal costs increased by 0.15 yuan to achieve better technical and economic results. First, the mining area geological mining conditions and structural characteristics of mining village mining technology conditions in Table 1,