School of Coal Engineering, Shanxi Datong University China Jingcheng Engineering Consulting Co., Ltd.

针对目前机掘巷道临时支护方式存在支护不及时、强度低及费工费时等问题,开发研制出一套安全可靠、操作简单、适应性强的新型迈步自移式超前临时支架。采用框架滑移交替迈步结构体系、上网机构及锚杆钻进平台解决了支架的行走、铺网和永久支护问题。现场试验表明:该支架能够较好地适应井下巷道的工况条件,及时对巷道顶板进行多级临时支护,自动铺设金属网,避免了工序频繁转换,实现了永久支护与临时支护的有效平行作业,简化了劳动组织工序,提高了巷道掘进速度,相对原工效0.21 m/工提高了66.7%。

According to an untimely support, low support strength, high labor, high cost and other problems existed in the temporary support method of the mechani zed heading face, a new walking self moving advance temporary powered support with safety reliability, operation simple and high suitability was developed and manuf actured. A framework sliding alternative walking structure system, steel mesh paving mechanism and bolt drilling platform were applied to solve the walking, steel mesh paving and permanent support problems of the powered support. The site experiment showed that the powered support could well suit the performance condition of the mine gateway, could timely make multi temporary roof supports of the mine gateway, could make the automatic steel mesh paving, could eliminate the procedure freque ntly changed, could realize effective parallel operations for the permanent support and temporary support, could simplify the labor organization and could improve the dr iving speed of the mine gateway. In comparison with the previous work efficiency of 0.21 m 1 man, the work efficiency was improved by 66. 7%.