Fully mechanized working face roadway pre-excavating type fault passing method

Abstract

The invention relates to a method for pre-excavating a roadway through a fault in a fully mechanized mining face, comprising the following steps: 1) constructing a roadway for detecting faults; 2) drilling for coal exploration; 3) reinforcing and supporting the shed in the roadway; 4) during mining Control the inclination and pitch angle of the working face. The beneficial effects of the present invention are as follows: 1. The gangue can be extracted in advance in the pre-excavation roadway. On the one hand, the amount of gangue cut during mining can be reduced, the ratio of gangue in the raw coal can be reduced, the ash content can be reduced, and the coal quality can be improved; on the other hand, the mechanical and electrical equipment can be reduced. Reduce wear and tear, speed up the advancing speed of the working face, and improve the production efficiency of the working face. 2. The three elements of fault occurrence can be ascertained in advance, and detailed geological data can be provided for formulating scientific and reasonable measures for crossing faults. 3. Support and reinforce the surrounding rock at the fault in advance to reduce roof accidents during mining and improve the safety factor of the working face.

Description

technical field [0001] The invention relates to the mining technology of coal mine passing through geological structures, in particular to a method of pre-excavating roadway type passing through faults in fully mechanized mining working faces. Background technique [0002] Fault is a common geological structure in coal mines, and it is also an important geological factor affecting coal mine production. [0003] When the fully mechanized mining face encounters a fault with a drop less than 2 times the thickness of the coal, mining is generally carried out in a hard way. However, due to the distribution law of faults, the three elements of faults are not fully grasped, and it is difficult to scientifically judge the impact of faults on production. Moreover, faults contain residual structural stress, lithology is broken, roof pressure increases, management is more difficult, and roofs are prone to occur Due to the high hardness of the gangue, whether it is directly cut by a co...

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Problems solved by technology

However, due to the distribution law of faults, the three elements of faults are not fully grasped, and it is difficult to scientifically judge the impact of faults on production. Moreover, faults contain residual structural stress, lithology is broken, roof pressure increases, management is more difficult, and roofs are prone to occur Due to the high hardness of the gangue, whether it is directly cut by a coal machine or drilled and blasted to break the rock, it will damage the mechanical and electrical equipment, reduce the mining efficiency, increase the cost, and the gangue will be mixed into the coal flow. Affects coal quality, increases raw coal ash content, and reduces economic benefits of enterprises

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