论文部分内容阅读
In an underground coal mine, adequate roof support is required to maintain strata integrity, contribute to uninterrupted production, and ensure safety.Cost and rate of production pressures necessitate optimised support densities.There are statutory requirements for an engineered design within a risk-managed framework.A method is demonstrated that is currently being utilised in underground longwall mines in the Bowen Basin, Queensland to design and specify roof support for gateroad development, and longwall retreat in the maingate (headgate) beltroad.The design method optimises primary and secondary support densities to immediate roof lithology, strength, depth and panel orientation.It can be used to predict and plan roof support requirements.An additional beneficial outcome is that one design input parameters is an understanding and quantification of immediate roof competency.It is possible to develop and utilise a comprehensive empirical roof support design method based on relevant mining experience, to satisfy operational and statutory requirements.The foundation of the design method is a large database of Bowen Basin roof support experience.