Comprehensive-conventional mechanical mining double-unit face coal mining method under complicated geological conditions

Abstract

The invention provides a comprehensive-conventional mechanical mining double-unit face coal mining method under complicated geological conditions. Directed at mining of coal resources in irregular sections under complicated geological conditions, the method includes: arranging an equal length comprehensive mechanical mining face on the upper part of a coal briquette in a section, arranging an unequal length conventional mechanical mining face on the lower part of the coal briquette according to the remaining coal briquette shape in the section, making use of three section drifts to prepare two stope faces so as to form a double unit mining form between the equal length comprehensive mechanical mining face and the unequal length conventional mechanical mining face, advancing the two faces in a coordinated way, and always keeping the conventional mechanical mining face ahead of the comprehensive mechanical mining face by 5m, and when the length of the conventional mechanical mining face varies, increasing or decreasing the number of single hydraulic props and articulated roof beams in the conventional mechanical mining face or properly adjusting the prop space based on required support density so as to adapt to the face length variation. The method provided in the invention achieves arrangement of the equal length comprehensive mechanical mining face during irregular coal briquette mining under complicated geological conditions, simultaneously recovers coal resources to the utmost, and improves the mechanization level of coal mining under complicated geological conditions.

Description

technical field [0001] The invention relates to a coal mining method, in particular to a comprehensive-machine pair-pulling coal mining method under complex geological conditions. Background technique [0002] Due to the coal seam stability (including coal seam shape, thickness, structure and recoverability) and the complex and changeable geological structure under complex geological conditions, the coal blocks in the mineable area of ​​some underground sections are irregular in shape; Underground mining of regular-shaped mineable coal resources usually adopts blast mining technology and ordinary mechanized coal mining technology (mechanical mining). It has strong adaptability to changes in the inclination angle, length and thickness of the coal seam of the working face. At the same time, since the working faces of the above two coal mining processes usually use single hydraulic props and top beams to support the roof, the supporting equipment is of relatively small mass, w...

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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems existing in existing coal mining methods under complex geological conditions, the present invention provides a fully mechanized mining face that does not need to increase or decrease supports, and realizes maximum recovery of coal resources under complex geological conditions. coal method

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