This paper introduced the role and characteristic of road headers S150A were,stressed the road header failure analysis and troubleshooting the necessary,focused on the common S150A road header failures,failures and the reasons for exclusion method.

Moving simulation of loading process of star wheel loading mechanism of roadheader;

Failures tree and reliability analysis of roadheader spray system;

Analysis of the main factors affecting the performance of a roadheader;

Theory and realization of supervision and control system for tunneling machine;

It mainly introduces the failure diagnosis and elimination of travel unit of S200 tunneling machine applied in mixed coal-rock drift and coal-rock drift.

Based on the mechanical model of single bit, drilling loads on the cutting head of tunneling machine are simulated by means of computer in this paper.

Comparison of features and performances of longitudinal cutting head and transverse cutting head of heading machine;

Improvement of Sloo heading machine cool system;

Measurement and analysis on the vibration of the electronic central box of underground heading machine;

Diagnosis and remove of the faults to walking part on MRH-S100-41 tunneller;

This paper introduces the main technical parameters,structures and technical featur es of EBJ-120TP type tunneller.