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What are the main part of the outside open-air quarry plants ?

In recent years, with the rapid development of urban and rural construction , the scale of real estate and urban infrastructure construction continues to expand , a sharp increase in the demand for stone , Quarry plant, the number was a surge in the trend . On the one hand , the Quarry plant in large part to meet the needs of the urban construction and development ; the other hand, the quarry of a devastating ecological environment . Quarry almost no walls to prevent soil erosion measures , most of them have not been reclaimed green and ecological problems that can cause soil erosion , landslides , landslides , river blockage .Attention to the protection in the development process , not taking into account the location of the quarry , angle , aspect and direction , did not consider the waste soil and residue retention and stacking Once reclamation green , earthworks workload is too a cost of large and difficult to carry out greening work .

According to the various types of stone market conditions , especially the exploitation of the geological structure and physical characteristics of the quarry after the general mining consists of the following four components :

(a)The stripped topsoil mining or processing of the accumulation of waste rock from waste rock dumps or waste dump . Waste rock dumps are usually scattered gravel structure , the slope is very loose , rainy season, muddy water flooding , serious soil erosion, slope , and are often accompanied by the collapse phenomenon , but it 's usually moderate slope , the construction is not difficult , and the plants easier rooted, and thus easier to vegetation recovery .

(b)Stone poached left platform or Hang Hau slash . Platform is often the most hard rock , almost no loose matrix ; but its vegetation restoration is also not difficult , the simplest and most effective way is off indigenous , from different places brought into the soil , cover the surface of the platform or Hang Hau slash to the formation of about 10 ~ 20 cm soil layer .

(c)Shek Pik . The biggest feature of stone walls slope smooth , without any matrix , and the slope is mostly more than 80 ° or 90 ° , is a veritable " cliffs " . Clearly, the stone walls of the complex Green is extremely difficult , almost is the limit of the difficulty in ecological restoration .

(d)Quarrying the remaining slope. Slope , usually around 40 ~ 70 ° , usually the hard gravel and stone structure , but the upper is often the soil layer ; a lot of the remaining slope is also retained during mining use pedestrian trail , and thus to take certain Engineering measures to ensure that the plants at an early foothold often can to ensure the success of the recovery .

In addition, the degree of difficulty based on the geomorphic characteristics of the abandoned quarry and governance of the construction can also be divided into abandoned mining stone walls ( sloping wall) and the Hang Hau trace two districts . Which the main complex of the slope wall green is the key and difficult points of the quarry complex green . Solve the complex green wall on the main slope , and basically solved the quarry complex green . Slope wall composition of the main slope wall is divided into three categories , ie, slope, rock slope and rock mixture slope ; according to the priorities of the main slope wall of the slope can be divided into < 40 ° , 40 ~ 70 ° , 70 ° above different levels.
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