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The main development of the roadway is the core of a mining method, and its choice is crucial in mine design. The choice of the main type of roadway to be developed is determined by the following conditions:
(1) Surface topographic conditions. After not only to consider the ore from underground (or cave mouth) shipped out, leading to the beneficiation plant or transport distance and transport conditions Sinotrans loading sites, taking into account more fully in your vicinity volume of discharge of waste rock venue, will inevitably result in waste The long distance transportation of stone increases the cost of ore. We also need to consider the impact factors of permanent surface facilities (such as railways), rivers and so on.
(2) Deposit conditions. It is the main basis for the choice of mining methods, such as the inclination of the ore body, the side angle and other factors of production are important to determine the development method.
(3) Mineral rock properties. Here mainly refers to the stability of the surrounding rock of the ore body. In order to reduce the engineering maintenance cost due to the poor stability of the ore rock or the impact of the ground pressure after the roadway, the mineral rock properties must be considered when selecting the development method.
(4) Production capacity. As for the pioneering method introduced in the previous section, the production capacity (elevation or transportation) is different due to the difference in the main roadway and roadway equipment. In general, the flat mining method has the largest transport capacity, and the shaft is higher than the inclined shaft.
In addition, the difficulty of opening up roadway construction, engineering quantity, project cost and length of construction period, etc., can not be used as an important basis for determining the development plan, but it must not be ignored. Especially in small mines, there are often cases where the construction strength is insufficient, the technical quality is poor, and the construction management cannot keep up. Therefore, local construction forces and characteristics should also be considered in the choice of roadway type.