Basic knowledge of open pit mining

➤ Annual, quarterly and monthly mining plans prepared by producing mines

It is one of the contents of the annual production plan of the production mine, but also the core of the annual production plan, is an important document for the organization and management of mine production. Its task is based on the output, quality, technical quota and other indicators issued by the state in the year. According to the requirements of the mining schedule in the technical design, the mining work of the year is arranged. Therefore, in addition to arranging the position of the work line at the end of the year or the end of the season, it is also necessary to calculate the production capacity of the main production processes and auxiliary workshops such as vegetable explosion, mining, transportation, soil discharge and machine repair in detail, identify the weak links, and formulate corresponding measures to ensure the completion of the production task.

Iii. Basic contents and preparation requirements of the mining schedule plan:

Construction content

The mining schedule of open pit mine is usually expressed in the form of chart, which reflects the relationship between the time, scenting and mining and stripping amount of mine engineering development. In other words, the development state of mine engineering is expressed from these three aspects.

Time: the start and end time of open-pit construction, the time of putting into production, the time of reaching the new level of production.

Space: the spatial position of each project, the advance relationship of each level of advancement, the relationship between expansion and extension.

Quantity: the amount of infrastructure works, the amount of ore mined year by year, the amount of stripping, the amount of digging ditch, the ratio of production stripping and mining, the schedule of mining.

The schedule should be prepared year by year, generally prepared to 3-5 years after the design calculation, the so-called design calculation year is the year when the ore has reached the specified production capacity and started production with the equilibrium production stripping ratio, and the total amount of mining and stripping begins to reach the maximum. The total amount of mining and stripping is the basis for the calculation of mining equipment, power, material consumption, staffing and building scale.

1. Mining level stratification plane

It should be prepared on the basis of the geological stratification plan, the amount of ore and rock mined year by year, the number and platform number of working excavators, the position of access ditch and opening ditch, the boundary line of ore and rock, the mining boundary and the position of the working line at the end of the year, etc. This indicates the state of project development year by year on a certain step.

2. Mining comprehensive plane at the end of the year

It is prepared on the basis of excavation horizontal stratification plan. It has the position of the working line of each level, the position of the access ditch and the opening ditch, the configuration of the excavator, the dividing line of the mine and rock, the mining boundary and the line setting of the transport station. This indicates the development status of mine engineering at the end of a certain year, including the length of working line, the width of working flat plate, the excavation of inclined ditch and section ditch, the advance relationship between upper and lower levels, the reserve ore quantity, the working face line and the excavator configuration.

3. Annual production development chart

On the basis of the completion of the mining schedule, the mining plan is only prepared 3-5 years after the design calculation, and the future output can be roughly determined in 3 or 5 years.

Establishment requirement

1, as soon as possible to meet the national requirements for ore production, according to the specific situation of the open pit mine, should be as much as possible to reduce the amount of infrastructure projects, accelerate capital construction, to ensure that within the specified time to put into production, put into production as soon as possible to achieve the design production capacity.

2, maintain the specified reserve indicators at all levels to ensure the balance of production, in the mining of a variety of grades of ore, but also require a variety of industrial grades of ore production and quality to maintain stable and regular changes.

3, correctly deal with the contradiction between stripping and mining, implement the policy of "mining and mining in parallel", the production stripping ratio should be arranged economically and reasonably, the maximum production stripping ratio period should not be too short, and the stripping ratio of two different periods should not change too much.

4, the upper and lower level of the working line to maintain a certain advance distance. Make the width of the flat plate less than the minimum working width of the flat plate, the working line should have a certain length, and keep as regular as possible. To ensure the minimum curvature radius of the line and the transportation road at all levels, the mobilization of mining equipment should not be too frequent.