The paper summarizes the experience of Half Coal Rock Timbering.

Numerical simulation optimization on parameters of bolt support in semi coal and rock roadways

This paper introduces the supporting technique of high-speed load-bearing pre- stressed cable anchor used to extra large coal-rock chamber,describes the selection of support pattern,support parameters and construction method based on the prac- tical conditions;and also makes a thorough study on the results of strata control ob- servations.

By the computer simulation, the cutting course and the mechanics performance of medium-coal-rock roadheader are mastered, which offers the reliable foundation for studying and improving the machine; practical examples are provided for the analysis of the characteristics of cutting header＇s loads and the working performance of the roadheader.