GEOLOGICAL HAZARD MODES AND INTEGRATED ENVIRONMENTAL MANAGEMENT OF HIGHLY INCISED SLOPES IN JIXIAN MINES ILLUSTRATED WITH EXAMPLE OF NORTHERN DAXINGYU MINE, JIXIAN

With the national-wide mines shutdown, a great amount of mine slots are abandoned, which become one main media for the formation of geological hazards. At the center of Daxingyu Mine, there are eight mine lots close to the county of Jixian. Their total area is 207.8 ha. The existing man-made highly incised slopes lead to frequent geological hazards, and seriously influence the routine living environment of the residents in those areas. This paper takes the Daxingyu Mine of Jixian as the example, and investigates in detail for the damage modes and hazard factors, possible hazard protection and integrated environment management solutions for the highly incisive slopes formed with dolomite rocks in the Jixian mine area. Based on the investigation, there are four types of hazard modes including slope debris flow, collapse, bedding slip cracks, and slip bending. They mainly result from the change of slope shape with the man-made digging. With the multiple influence of internal and external factors, the formation of bedding landslide can be triggered, which finally leads to the series of geological hazards. The proper hazard protection solutions include top cutting, bottom filling, anchor reinforcement, slope protection. The integrated environment remediation should employ platform tree planting, hole planting, vine climbing and spray seeding greening methods. In addition, the targeted mine slot is located within the urban planning scope close to a critical traffic junction. So the environment landscape design should also need to be considered seriously. Thus the solutions of slope cutting and local anchor reinforcement can be selected for the hazard remediation, which will highly rely on the integrated environment management measures. In addition, the arbor and bushes can be planted on the created platform with the slope-cutting, which results in a very good comprehensive treatment measure.