An investigation into the relationships between geology, geometry and wind blast magnitude & intensity in underground coal mining

煤矿井下地质、几何条件与风灾大小、强度关系的研究。在一些地下煤矿中，顶板由大块岩石组成，随着开采的进行，顶板岩层不会定期塌陷，而是悬空，导致大面积的无支撑顶板。这些区域可能会突然塌陷，压缩下方的空气，迫使其通过周围的开口从空隙中排出，从而产生一种被称为风爆的潜在危险现象。目的是对这一现象有一个基本的了解，从而为制定减轻危害的战略提供一个基础。预期结果是提高采矿安全、技术可行性和经济水平。

An investigation into the relationships between geology, geometry and wind blast magnitude & intensity in underground coal mining. In some underground coal mines where the roof comprises massive rock, the roof strata do not cave regularly as extraction progresses but hang up, leading to extensive areas of unsupported roof. These areas can suddenly collapse, compressing the air beneath and forcing it out of the void through surrounding openings giving rise to a potentially hazardous phenomenon known as wind blast. The aim is to develop a fundamental understanding of the phenomenon and thus provide a basis on which to develop strategies to mitigate the hazard. Outcomes are expected to be improved levels of mining safety, technical viability and economics.