基于岩体质量分级的破碎矿体采场结构参数确定

Determination the Stope Dimensions of Fractured Orebody Based on Rockmass Quality Classification

以四儿沟门金矿为工程依托,开展急倾斜薄到中厚矿体采场结构参数确定。通过对四儿沟门金矿1750中段进行地质调查、岩石力学实验,获得用于岩体质量分析所需的基本参数;应用岩体质量Q分级和Mathews稳定性图表法分析采场稳定性;基于Mathews稳定性图表法确定采场冒落的边界尺寸参数,为中深孔诱导冒落的采场结构参数确定提供理论依据。分析认为在采场高度保持36m不变的情况下,当采场长度为50m时两帮会发生塌落,而顶板则保持稳定,这些参数的确定为诱导冒落采矿技术的使用提供可能性。

The structural parameters optimization of test stope in the steeply inclined ore body with thin to medium thickness was carried out in the Siergoumen gold mine,Gansu Province.By means of the engineering geologic investigation and rock mechanics experiments at the 1750 mlevel,many mechanical indexes which reflect the quality of engineering rock mass were acquired.Based on the parameters, ＂ Q＂ rock mass classification was applied to analyze the stability of stope;Based on the critical dimension for caving zoon from Mathews stability graph,theoretical basis was provided to ensure the dimension of stope that can lead to cave.Analysis under the condition of invariable in stope 36 maltitude shows that when the stope length is 50 m,both sides cave but the roof is stable.These parameters provides the possibility for the use of induced caving mining technology.