Wengfu Phosphate English Ping Ore Block In The Open Pit Slope Stability And Safety Control Measures,

Compared with others, the open-pit mine' s slope engineering has its own particularity. The open-pit slope involves the material nature of soils and rocks forming it, its design parameter, the production technique, the production technology, the environment of its location, the human management level and so on. With the increasing pace of the socio-economic development, the open-pit mine' s mining scale also unceasingly expands and its mining depth unceasingly increases, thus forming hollow stopes or deep concave stopes gradually. This causes the slope to become both high and steep, leading to the increase of landslide accidents. Consequently, the slope security problem is getting more and more prominent. The stability analyses to the open-pit mine slope engineering is able to discover the potential hazards as early as possible and to take measures promptly, thus avoiding or reducing the occurrence of these accidents, and providing safeguard for the mine' s safe production.This essay studies the open pit located in Yingping Ore Section of Guizhou Wengfu Phosphorus Mine. In this paper, massive analyses are carried out on the data collected, through the scene investigation and study. Simultaneously, the indoor physical mechanics nature experiment is carried out on many kinds of rocks gathered from the scene, andΦ(?)CEHKO method is used in the data project processing of experimental results. Consequently, it obtains the strength index closer to the rock engineering reality, causing the analysis results to accord with the actual situation.This research paper selects 15 representative computation sections, with 8 hanging wall slopes and 7 foot wall slopes, according to the surrounding topographic and morphologic characteristics, engineering geo-environment, slope geometric parameters, mining sequence, mining technology and so on. It obtains that the hanging wall slope belongs to circular failure, while the foot wall slope to plane failure through summarizing the reconnaissance results of Yingping Ore Section' s land surface and combining each kind of engineering geology condition of the slope. Then, the limit balance method is used to calculate the safety coefficient of 15 representative sections in this essay. In addition, each of the above 15 sections is analyzed by combing the standard safety coefficient determined by grade-estimation method and engineering analogy method. Finally, the paper obtains the conclusions that all sections of the hanging wall slope can satisfy the safety requirements; 13-13 and, 14-14 sections of the foot wall slope cannot achieve the safety requirements.This paper puts forward some pointed safety prevention measures in view of the mine' s actual situation, according to national related safety rules and technology norms. It also proposes corresponding treatment methods to unstable land sectors in the analysis results. In addition, it formulates sound slope management system in order to enable the safety prevention measures to be carried through and enforced. This management system not only can well instruct the slope safety management of Yingping Ore Section, but also has certain referential and guiding significance to other mines.