近距离煤层采空区下巷道掘进的支护方法研究

Research on the Support Method of Roadway Tunneling in Close Distance Coal Seam Goaf

山西省大同市矿区侏罗纪煤层较多,层间距离近,开采时间较长,现大多数可采区域都在采空区下,原来的支护方法不能满足采空区下巷道的稳定。以云岗矿12-2~#层410盘区21003巷为例,研究了近距离煤层机掘巷道在穿过采空区过程中,根据层间距的变化采用不同参数的锚杆、锚索和架棚联合支护方法,保证了掘进期间安全生产,巷道支护状况良好。

In Datong city, Shanxi Province, Jurassic coal mining area is quite large, the distance between the layers is very close, and the mining time is long. Now most of the exploitable area is in goaf. As a result the original support methods can＇t maintain the stability of the roadway under the goaf. In the paper, the 21003 lane, 410 panel, 12-2~# layer, Yungang Mine is taken as an example, the joint support method of bolt, anchor cable and shelf with different parameters is used in the course of the roadway driving through the goaf, which ensures the safe production and the support condition of the roadway is good.