黑色岩层诱发山地灾害的水—岩作用机理研究

Study on Mechanism of Water-rock Interaction on Mountain Hazards Induced by Black Stratum

研究目的:在黑色岩层分布的高原山地区域,黑色岩层作为一种山地灾害的诱发因素,时常会给工程建筑以及人类活动带来危害。本文通过对黑色岩层水岩作用机理研究,期望对黑色岩层分布区内的山地灾害治理以及建筑工程设计提供一些帮助。研究结论:黑色岩层中的黄铁矿等硫化矿物在有氧参与的水岩作用下,可以产生硫酸型酸性水并影响周围矿物成分,导致黑色岩层本身以及与其相接触的非黑色岩层或建筑材料等矿物成分发生变化,使得岩石材料的物理力学性质受到弱化,最终容易在山地重力作用下形成山地灾害。通过对都匀地区不同岩性的黑色岩体以及周围水样进行试验分析,研究了山地灾害中含黑色岩层边坡的破坏模式,提出从控制酸性水因素进行治理的措施建议。

Research purposes： As a causative factor of mountain hazards , the black stratum, distributed in the mountainous area, often gives harm to the engineering and human activities. The study is done on the water - rock interaction mechanism of the black stratum for offering some assistances to the treatment of the mountain hazards and the engineering design. Research conclusions：The sulfide minerals like pyrite in the black rock can generate sulfuric acid water under water - rock interaction with the oxygen, and it influences the surrounding mineral composition. These actions can lead to the changes of the mineral composition of the black rock and non - black rock nearby to weaken the physical and mechanical properties of the rock materials, resulting in appearance of the mountain hazards under the gravity action. Based on the test and analysis of the black rock and surface water in Dujun area, the failure mode of the black rock slope in the mountain hazards is researched and some engineering control measures are offered.