Crushing station pit digging method

Abstract

The invention discloses a method of cutting chisel for the foundation ditch of a broken station, the adopted technology program of which includes the perforation of blast hole, the blasting and the deslagging technology after the blasting. The main feature is adopting a pre-hole to control blasting, medium-length hole blasting and slope deslagging technology. Due to adopting the pre-hole to control blasting and slope deslagging technology, the invention has the advantages of realizing one-time blast, feasible technology, being safe and reliable, economic rationality, and being suitable for the construction of the foundation ditches of open-air mine broken stations and similar foundation ditches in other fields. In the construction of foundation ditch, the efficiency can be improved by 50%, the construction time of foundation ditch can be reduced by 3 to 5 months. The invention is also suitable for cutting chisel for some similar foundation ditches in other engineering fields. Meantime the invention is suitable for cutting chisel not only for vertical elevation foundation ditch, but also for slope foundation ditch.

Description

technical field [0001] The invention belongs to the technical field of mining and relates to a method for excavating a foundation pit of a crushing station in a discontinuous-continuous process system. Background technique [0002] The discontinuous-continuous process has the characteristics of simple process, large transportation volume and low operating cost. At present, it has been adopted in many foreign open-pit iron mines, non-ferrous metal mines and building materials mining mines. It is mature and has been valued by many large-scale open-pit mines at home and abroad. Many countries are also preparing to adopt this process to solve the problem of development and transportation of deep concave open-pit mines. However, this process has disadvantages such as large amount of construction, high difficulty, long construction period, and high engineering cost. [0003] The existing discontinuous - continuous process crushing station foundation pit section area is generally ...

AI Technical Summary

Problems solved by technology

Since the foundation pit of the crushing station is generally located in a relatively hard rock mass (ore body), the hardness coefficient is relatively high, generally f = 10-16, and the existing excavation method is used, and the blasting layer height can only reach about 1m each time. Due to the disadvantages of many times of blasting and less amount of blasting at one time, it is difficult to achieve large-scale blasting; after blasting, the gravel is collected manually, and then the earth and stone is lifted to the ground surface by tower crane

This method has the disadvantages of high difficulty in excavation, poor blasting effect, low construction efficiency and high cost. It takes about 6 to 8 months to build a foundation pit for a crushing station.

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