Large-area coal mine roof weighting storm damage eliminating method based on energy dissipation speed reduction

Abstract

The invention relates to a large-area coal mine roof weighting storm damage eliminating method based on energy dissipation speed reduction. An infrared laser speed monitoring device is arranged in anoriginal mine roadway to monitor the caving degree of a goaf; a storm energy dissipation tunnel is formed in the roadway, and meanwhile, induction air-tight doors and air doors are correspondingly arranged, so that elimination of the storm damage is achieved by controlling opening and closing of the induction air-tight doors and the air doors. The method is high in applicability, and for mine wells in different conditions, the influence of the storm on a preparatory roadway can be weakened and even eliminated; and the safety is high, all operation is intelligent, and the unavoidable mistakes caused by human errors are reduced. Through the multi-aspect thought, the feasibility and the reliability of the method are improved. The process is simple, and the technology is mature; and all the operation is regulated by a central control system, it is only required that designers well compile programs, control from workers is not needed, and the requirements for the workers are reduced.

Description

technical field [0001] The invention relates to the technical field of prevention and control of storm disasters in mine tunnels, and more specifically, to a large-area pressure-storm hazard elimination method based on energy consumption and speed reduction in coal mine roofs. Background technique [0002] With the improvement of mining equipment and supporting mining technology, the width of the coal mining face has increased significantly, some working faces have a width of up to 300m, and the advancing length of the working face has increased from less than 1000m to more than 2000m, resulting in an increase in the goaf area. In addition, the advancing speed of the coal mining face is getting faster and faster, and the overhanging area of ​​the hard roof caused by single mining increases sharply. When the total caving method is used to deal with the hard roof of the gob, the damage caused is getting bigger and bigger. Traditionally, in the early 20th century, that is, the ...

AI Technical Summary

Problems solved by technology

However, the properties of the coal seam roof are too complex, and the lithology of the coal seam roof is different under different environments, which requires on-site measurement, which consumes too much time, manpower and material resources, and affects production.

[0005] (2) poor security

Observing the displacement of the roof in real time and predicting the possibility of roof collapse by establishing a mathematical model lacks a theoretical basis

[0006] (3) The process is complicated

The use of closed walls requires the establishment of thick concrete walls in the roadway to consume the energy of the storm. The progress is slow and the process is complicated. At the same time, it affects the transportation of coal and materials and the supply of ventilation.

What's more important is that the large area of ​​the roof is pressed against the storm wind, the wind speed is fast, and the airtight wall cannot be built in a short time, which is contrary to the purpose of blocking the storm

[0007] (4) Higher requirements for underground mining personnel

The above method requires the staff to be familiar with the properties of the rock roof or the mathematical model of the roof displacement, and to be able to take appropriate measures in combination with the specific situation, which requires higher knowledge of downhole equipment control personnel

Images