Hydraulic fracturing comprehensive mechanized continuous mining method for gently inclined hard rocks

Abstract

The invention provides a hydraulic fracturing comprehensive mechanized continuous mining method for gently inclined hard rocks. The hydraulic fracturing comprehensive mechanized continuous mining method for the gently inclined hard rocks comprises the following steps of (1) determining ore block structure parameters; (2) arranging a mining and cutting project, and forming a mining working face; (3) forming fracturing holes in the mining working face; (4) hydraulically fracturing an ore body in the fracturing holes; (5) adopting comprehensive mechanized stoping; and (6) filling a goaf. Compared with the prior art, when the hydraulic fracturing comprehensive mechanized continuous mining method for the gently inclined hard rocks is used for mining the hard rocks, the mining and cutting engineering amount, the fixed number of workers and the ventilation energy consumption are greatly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a comprehensive mechanized continuous mining method for gently inclined hard rock hydraulic fracturing. Background technique [0002] Gently inclined hard rock ore bodies in non-coal mines are generally mined by drilling and blasting methods, such as open-field mining methods such as room-and-pillar method and comprehensive method, or layered filling mining methods, which mainly include drilling, charging, blasting, ventilation, and mining. Mining, filling and other processes, the size of the stope structure is small, the cycle time is long, the labor intensity is high, and the production capacity is low. [0003] Since most coal mines are produced in gently inclined layers, the comprehensive mechanized continuous mining technology of coal mines provides a new idea for efficient mining of non-coal mines with gently inclined ore bodies. Comprehensive mechanized continuous mining c...

AI Technical Summary

Problems solved by technology

However, for non-coal gently inclined hard rock ore bodies, the cutting efficiency of mining machines is low, the picks wear quickly, the replacement cycle is short, and the production efficiency and cost will be greatly reduced; at the same time, the depositional occurrence of non-coal deposits is more complicated than that of coal mines , the floor of the ore body fluctuates greatly, making it difficult to apply the comprehensive mechanized continuous mining process in non-coal gently inclined hard rock mines

[0004] Existing patents such as patent announcement number CN105019904B disclose a gently inclined thin vein mechanized continuous mining method based on a mining machine, patent announcement number CN109339785B discloses a gently inclined medium-thick ore body multi-unit combination intensive mining method, patent announcement number CN108104869A discloses A kind of continuous mining and filling mining method of a gently inclined medium-thick ore body, a kind of filling mining method of a gently inclined medium-thick phosphate ore body publicized by the patent announcement number CN104141495B, although these mining methods can be applicable to the gently inclined medium-thick ore body Mining, but it is easy to cause ore loss and waste, explosive blasting vibration and smoke pollution are relatively large, especially in the continuous mining of hard rock ore bodies, the efficiency is low

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