Lower inclined shaft development plan

This kind of scheme is that the inclined shaft is arranged in the surrounding rock of the ore body, and several stone gates are excavated to communicate with the ore body, and the middle section is drilled in the ore body (or along the contact part of the rock and rock). This method of development does not require a security pillar, and the maintenance conditions are better. This is its biggest advantage. In this embodiment more compact metal mining applications, such as strokes, Shandong Province - tuck tear tape and move - fault zone deposits, its production capacity dozen metal mines 300t / d or less mostly using this program. The inclination angle of the inclined shaft of this scheme is preferably the same as the inclination angle of the ore body. The inclination angle of the ore body in this area is about 35o~42o; most of the scheme adopts the scheme of the lower disc pseudo-inclined well with inclined inclination angle of 25o~28o.

Before determining the development plan for the inclined shaft, it is necessary to find out the inclination angle of the ore body. That is to say, before designing, in addition to understanding the relevant information about the ore body, it is necessary to accurately grasp the inclination of the ore body (especially the lower plate), otherwise, The downhole inclined well scheme or the in-diagonal inclined well scheme will cause problems in the project. For example, the development plan for the inclined inclined shaft of a gold mine is due to the lower degree of drilling control, but the upper part is clearer. The design is based on the clear data of the upper part, and the change of the inclination angle of the ore body below -30 m is not expected at all. Therefore, during the construction, when the inclined well is drilled to -25 m, the inclined well is inserted into the ore body, and the result is a mistake caused by unclear geological data.

The only way to prevent this from happening is to submit geological data according to the rules and regulations (this is the minimum requirement). At the same time, it is necessary to conduct investigations to fully understand and master the occurrence rules of mineral deposits and ore bodies in the region. In some small and medium-sized mines, especially small local mines, the mine design work begins when the geological data is insufficient or not sufficient. At this time, the designer should pay full attention to the changes in the deep (or local) dip angle of the ore body. (especially the dip angle becomes urgent). If the geological data is used for the inclined well, the inclined wellhead may be considered to be farther away from the ore body to prevent the engineering body from being changed due to the change of the dip angle of the ore body.

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