GAS CONTENT TESTING FOROUTBURST MANAGEMENT COMPLIANCE

摘要

It is fundamentally important to make sure that compliance for mining is not issued on the basis ofrngas content tests that are inadequately located, deficient in frequency or in error. This paper covers some of thernissues in relation to location and frequency of cores and validation of gas content test results. Core locations arerndiscussed in the context of recent findings on the reduction of gas drainage efficiency towards the end of in-seam,rncross panel boreholes. Some guidelines for sample frequency are given, with increased frequency being requiredrnin circumstances involving departure from “normal” conditions as defined through analysis of past data. The gasrncontent validation methodology is set up to provide rulings on gas content test results at the time of reporting, andrnis intended to aid mine staff in better evaluating test data as part of the process of issuing management planrnconformance notices.