Sublevel circulating filling mining method for coal under main roadway of coal mine

Abstract

The invention provides a sublevel circulating filling mining method for coal under a main roadway of a coal mine. The method mainly solves the problem that the coal under the main roadway is difficultto recover under the condition that the horizontal distance and the vertical distance between a working face and the main roadway are different. Before mining, a filling area is divided in a sublevelmode and the main roadway is reinforced in the upward direction of a coal mining working face; in the mining process, a filling space is created in an area to be filled in a goaf, a filling pipelineis laid, each subsection area adopts a mode that filling is started by stopping coal mining when the roof control distance of the working face reaches 5.5 meters and every filling cycle is 2.2 meters,and circular filling is performed till the filling area; and finally, during mining and at the later stage of mining, a monitoring station is arranged in the main roadway and the filling area and isused for observing the deformation of the main roadway and a filling body, the filling mining parameters are adjusted according to the monitoring result, the safety and stability of the main roadway are ensured, more coal resources are mined, and the method is a new method for implementing the green mining concept in coal enterprises, and is safe, economical, environmentally friendly and efficient.

Description

technical field [0001] The invention relates to the technical field of filling and mining in coal mines, in particular to a mining method for sub-staged and circular filling of compressed coal in main roadways of coal mines. Background technique [0002] The main road in the coal mine is responsible for a series of tasks such as transportation, ventilation, drainage, pedestrians, etc. of the entire mine or a certain mining area or a certain level. It is one of the most important roadways in the mine. The subsidence of the roadway roof, the maximum displacement of the two sides, the displacement of the bottom drum and the overall offset of the roadway have higher requirements than other roadway standards. Therefore, during mine production, the stability of the roadway must be ensured. This is of great significance to the safe production and sustainable development of the entire mine. [0003] On the other hand, the main road is generally in the rock formation or coal seam. W...

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Problems solved by technology

[0003] On the other hand, the main road is generally in the rock formation or coal seam. When multiple coal seams are mined, there are more coal seams in the lower part of the main road. If this part of the coal seam is not mined, a large amount of valuable coal resources will be wasted, which seriously affects the reliability of the mine. sustainable development

[0004] In addition, due to the layout of the working face and other reasons, the distance between the mining face and the roadway in the horizontal direction is not equal, and the distance in the vertical direction is not equal. The economic cost of full filling mining is too high, and the filling range of partial filling mining is difficult to determine

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