A new method for faulting with excessive drop in fully mechanized mining face

Abstract

The invention provides a new method for a fault with an excessive drop in a fully mechanized mining face, comprising the following steps: pre-excavating an exploration roadway perpendicular to the direction of the fault along the coal seam floor in the transport channel; establishing a fault direction calculation based on the fault disclosure information in the exploration roadway Model, design the direction of the blasting roadway along the direction of the fault; design the section size and layout position of the blasting roadway according to the running track of the coal cutter and the support; arrange the pre-splitting deep holes in the blasting roadway at intervals, and set the groove shallow holes in the middle of the pre-splitting deep holes; Set up ear-shaped chambers in key parts of the blasting roadway, and fan-shaped drilling holes are arranged in the chamber; during blasting construction, the fan-shaped drilling holes in the ear-type chambers are firstly blasted, followed by the pre-splitting deep holes in the blasting roadway, and lastly blasting the slots Shallow holes; before the blasting construction, set single hydraulic props in the blasting roadway as required. The invention utilizes the deep hole pre-splitting blasting technology to pre-process the fault zone rocks, which can effectively help the shearer to cross the fault and ensure the high yield and high efficiency of the coal mining face.

Description

technical field [0001] The invention relates to a method for crossing a fault in a coal mining face, in particular to a new method for a fault with a large drop in a fully mechanized mining face. Background technique [0002] As a common geological structure in the coal mining process, faults seriously restrict the high-yield and high-efficiency working face due to their structural characteristics, mechanical properties and other factors, especially the large-drop faults. At present, the faults with excessive drop in the mechanized coal mining face mainly include the moving and jumping method and the jacking and bottoming method. The method of moving and jumping usually requires another cut to cross the fault, and a large amount of roadway excavation and maintenance costs are invested, and the process of stopping mining at the working face is complicated and the construction speed is slow; The method of shallow hole blasting achieves the purpose of lifting the roof or the b...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a new method for faulting with excessively large drop in fully mechanized mining working face, especially a new method for pre-excavating and pre-splitting deep hole pre-split blasting for fault with excessively large drop in fully mechanized mining face, which can effectively solve the problem of faulting with excessively large drop in working face

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