A Segmented Open Field Ground Pressure Control Method for Inclined Thick and Large Orebody

Abstract

The invention belongs to the field of mining and relates to a sublevel open stoping method ground pressure control method of inclined large and thick ore bodies. Chamber is divided into three sublevels in the vertical direction, and a roof pillar is reserved above; an along-vein roadway, a rock drilling roadway, a cutting level and a cutting raise are arranged at each sublevel; medium-length holeblasting is adopted to form cutting grooves; during stoping of the chamber, sublevel centralized blasting is adopted, centralized blasting is performed on the whole chamber four times in total. The method has the benefits as follows: a mining preparation arrangement manner combining going along with and penetrating through veins outside of footwalls is adopted, and the mining preparation work amount is reduced; the sublevel centralized blasting technology is adopted, the stoping cycle of a stope is shortened, and the exposure time of a vacant stope is shortened; sublevel centralized ore removal is adopted, and the hanging wall pressure, transferred by falling ore, applied to footwall rock is reduced; a triangular ore pile is reserved on a chamber hanging wall, mixing of hanging wall wastestone during stoping is avoided, and the dilution rate is decreased.

Description

Technical field [0001] The invention belongs to the technical field of mining, and relates to a method for controlling ground pressure in a sectioned open-field method of an inclined thick ore body. Background technique [0002] The segmented open-field method is a common mining method for sloping thick and large ore bodies. This method has the advantages of large stope production capacity and safe working environment, but at the same time it has the advantages of long stoping period, large amount of mining engineering, and later stope. The surrounding rock is easy to fall and other shortcomings, therefore, its application range is limited. The traditional segmented open field method is suitable for mining ore bodies with relatively stable surrounding rocks of the upper and lower walls. Its purpose is to prevent the surrounding rocks of the upper and lower walls from being exposed for too long. The problem of falling off occurred. Summary of the invention [0003] The purpose of ...

AI Technical Summary

Problems solved by technology

[0002] The segmented open-stop method is a commonly used mining method for mining inclined thick ore bodies. This method has the advantages of large stope production capacity and safe operating environment, but at the same time has the advantages of long recovery period, large mining quantity The surrounding rock is easy to fall and other shortcomings, so its application range is limited. The traditional segmented open field method is suitable for mining ore bodies with relatively stable surrounding rocks on the upper and lower walls. The problem of falling

Images