ASSESSMENT OF THE STABILITY OF MINE HAULAGE DRIFT USING STATISTICAL ANALYSIS OF ARCH YIELDING SUPPORT FAILURE

Abstract

Purpose. The stability of mine haulage drift has been evaluated using statistical analysis of arch yielding support failure under different protective measures to create safe working conditions for miners in deep coal mines with steeply dipping seams. Methods. A comprehensive approach was used, including a mine experiment , probability theory methods, and statistical analysis of experimental data. Results. The stability of mine haulage drift on steep seams was assessed in natural conditions under different protective measures. It was found that while using post-and-lintel support to protect the drift, with an arch yielding support failure frequency of w≥0.56 and normal distribution of single-factor dispersion analysis statistics, the loss of cross-sectional area of the excavation over the length of the mining site was about 50%. While using cribbing support for protection, with an arch yielding support failure frequency of w≥0.29, the loss of cross-sectional area was 30%. Empirical frequency w of the arch yielding support failure along the length of the excavation does not differ from theoretical frequencies, allowing the probability of an event related to deterioration of the stability of the mine haulage drift along the length of the mining site to be determined within a confidence interval under different protective measures. Novelty. A functional dependence was established to evaluate the stability of the mine haulage drift under different protective measures along the length of the mining site using single-factor dispersion analysis statistics of arch yielding support failure. Practical significance. Based on the statistical analysis of arch yielding support failure installed in the mine haulage drift, it is advisable to consider that the operational condition of the preparatory workings is ensured when using protective structures in the form of wooden cribbing support.