论文部分内容阅读
卡尔·李卜克内西矿务局开采的是中厚倾斜矿床。矿石和围岩软弱和中等硬度,不稳固和中等稳固,含水。矿床分阶段开采,阶段高度为75m,每个阶段分为3个25m 高的分段。目前,回采工作在1090m 深处以下进行。上部中段矿体使用不同的分段崩落法方案开采。随着开采深度的增加、地压增大和矿床地质条件的变化,回采条件不断恶化。矿体和围岩中产生了压缩应力和剪切应力高度集中区,这就降低了矿岩的强度,增加了矿床采准和坑道维护的费用。
The Karl Liebknecht Mining Authority mined moderately to moderately-tilted deposits. Ore and rock are weak and medium hardness, unstable and moderately stable, containing water. The deposit is mined in stages, with a height of 75m and divided into 3 sections of 25m high each. At present, the mining work is carried out below the depth of 1090m. The upper middle section of the orebody is mined using different sub-caving methods. With the increase of mining depth, the increase of ground pressure and the change of the geological conditions of the deposit, the condition of mining is deteriorating continuously. The compressive stress and shear stress are highly concentrated in the ore body and the surrounding rock, which reduces the intensity of the ore rock and increases the cost of deposit mining and tunnel maintenance.