This paper introduces the application of the sliding-down-proof device in the inclined tunnel,and puts forward the improving measures for sensing mode.

12126 Xisan tiliao inclined drift adopt bolting and shotcreting(with wire mesh) technology and acquired the expect effection.

The direct and indirect reasons of the inclined drift haulage accident in Baiping Coal Mine are analyzed.

The design idea of protection device for car's running away of inclined shaft based on PLC was introduced in the paper.

According to the actual circumstance of inclined shaft, the authors introduces a new design of flexible, effective and reliable safety door in interlock car stopper and its installation and application.

This method with a simple production system,is of lower cost But problems such as methods of tunnel support and feedback and expanding roadway,and designs of ratio of extraction to reservation,should be still studied in the extraction through tunnel.