A green coal mining method for grouting filling in shallow coal seams and its settlement observation device

Abstract

The invention discloses a green coal mining method and a settlement observation device of shallow coal seam grouting filling. The method includes the following operation steps that 1), data are collected; 2), the terrain is explored; 3), drilling is carried out; and 4), grouting is carried out, and coal mining is completed. The coal mining method is qualitatively changed, it is not needed to comprehensively treat a subsidence area after waiting for coal mining any more, grouting filling is carried out while coal mining is carried out, land and other ground facilities are protected, and damagecaused by ground surface settlement is avoided. By means of the method, the settlement value of the position above a working face obtained after coal mining is controlled within a certain range, it isonly needed to smoothen the land, and it is not needed to rehabilitate the land or even acquire the land. By means of the method, in the grouting process, downhole coal seam mining is not affected. By means of the method, occupied actual work is less, the ecological environment in a coal mining region is slightly affected, and the ground facilities are effectively protected.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a green coal mining method and a settlement observation device thereof for shallow coal seam grouting filling. Background technique [0002] The central part of China is represented by the Central Plains, most of which are located in the plains. The mining method is mainly the longwall caving method. When there are villages and other buildings on the surface that need to be protected, the protective mining method should be considered to reduce the overlying rock. However, the depth of coal seams in most central areas is relatively shallow, and the surface subsidence appears quickly after coal mining, which can easily lead to surface subsidence within the scope and serious loss of ground buildings and cultivated land. For the comprehensive treatment of the subsidence area formed by coal mining, the effective methods are as follows: First, the traditional method of filling the ...

AI Technical Summary

Problems solved by technology

[0003] However, there are some defects in the prior art: first, the filling and reclamation treatment of the coal mining subsidence area changes the acidity and alkalinity of the soil, which adversely affects the growth of crops; second, after the filling and reclamation of the coal mining subsidence area , it will destroy the soil structure to a large extent, resulting in too poor soil after filling and reclamation; third, it will destroy the water resource cycle. During the coal mining process, it will have a negative impact on the groundwater and surface water cycle patterns, reducing surface water resources; Fourth, it is difficult to grasp the reclamation time. When the reclamation work starts too early, possible future situations will have a great impact on the reclamation work, resulting in all previous efforts being in vain. For this reason, we provide A coal mining method for grouting filling in shallow coal seams and its settlement observation device to solve the problems raised in the above-mentioned background technology

Images