(中南大学 资源与安全工程学院，长沙 410083)
摘 要: 倾斜矿体采场在开采后会暴露出较大的顶板及上盘，稳定性状况非常复杂，为了研究其稳定性及稳定的概率，本文通过Mathews合成图、考虑静荷载和爆破动荷载的FLAC3D数值模拟两种方式展开了研究。以某铅锌矿四个倾斜矿体采场为研究对象，采用RMR及Q′值法进行了岩体分级，使用重新绘制的考虑稳定等概率线的Mathews合成图和拟合的稳定等概率线公式，得到了四个采场顶板及上盘的稳定性状况和稳定概率；采用FLAC3D中加入爆破荷载的方式研究了采场在静力和动力下的稳定性。结果表明：由于考虑了暴露时间对采场稳定性的影响，发现暴露时间对岩性较差的采场影响尤其显著；Mathews稳定图法与数值模拟法相互验证，可较全面地分析倾斜矿体采场的稳定性。
关键字: 岩体分级；Mathews稳定图；数值模拟；动态扰动；稳定概率
（School of Resources and Safety Engineering, Central South University, Changsha 410083, China）
Abstract:The stopes of the inclined orebody expose two surfaces of the crown and the hanging wall after mining, so the stability analysis of the inclined orebody stopes is one of the most complicated issues of mining. To study the stability and the stable probability of the inclined orebody stopes, this paper carried out the research through two methods of Mathews synthetic graph and FLAC3D numerical modeling of static and dynamic loads. First, four stopes of the inclined orebody in a Lead-Zinc mine were selected, and the rock mass of them was classified using the RMR and Q′ value method. Later, the stable probabilities of the crown and the hanging wall of the four stopes were obtained by the fitted stable isoprobability line equations and the redrawn Mathews stability synthetic graph considering the stable isoprobability lines. Finally, the stabilities of the inclined orebody stopes under static and dynamic loads were studied by adding blasting load to numerical modeling. The results show that exposure time has a significant impact on the stopes with poor rock mass when considering the influence of exposure time on stopes stability. The stope stability of the inclined ore body can be analyzed comprehensively through mutual verification of Mathews stability diagram and FLAC3D numerical simulation.
Key words: rock mass classification; Mathews stability graph; numerical modeling; dynamic disturbance; the stable probability
