Shallow coal seam water protection mining method and application thereof

Abstract

The invention discloses a shallow coal seam water protection mining method and an application thereof and belongs to the technical field of coal mining. In a working face, a plurality of pre-excavation roadways are vertically or obliquely demarcated from a main transportation roadway, roadway excavation is conducted in a multipoint parallel operation mode, and the excavated roadways are filled intime. By controlling the roadway excavation width, the roadway interval width, the roadway excavation speed, the filling speed and the interval filling time, the fracture development of mining overburden rock and the falling capacity of roadway roofs are effectively controlled. By means of the method, continuous, stable and efficient coal production of the working face is guaranteed, sufficient time and effective space are provided for filling of the working face so as to make a filling body solidify and meet bearing strength requirements, evolution of the permeability of a water-resisting layer on a water flowing fracture zone of a shallow coal seam is controlled effectively, water protection mining of an occurrence area of the shallow coal seam is achieved, selection and application conditions of the water protection mining method are widened, and meanwhile safe, efficient and high-recovery-rate mining of coal resources is achieved.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a shallow coal seam water conservation mining method and its application. Background technique [0002] Northwest China is the main production area of ​​coal in my country, but it is located in the arid-semi-arid continental climate zone, with poor water resources, low vegetation coverage and fragile ecological environment. Practice shows that the development of mining fissures in the traditional way of coal mining will inevitably lead to a large-scale loss of water and soil resources in the mining area, bringing a series of mine environmental geological effects, and further aggravating the degradation of the originally fragile ecological environment. Therefore, environmental protection must be paid attention to while mining coal, especially the protection of water resources. [0003] The concept of water-conservation mining was formed at the end of the last century. After...

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Problems solved by technology

[0005] Technical problems to be solved: Aiming at the technical problems existing in the prior art, such as difficulty in coordinating coal mining and filling operations, complex filling system, large filling space and long filling time, the present invention provides a water-retaining mining method for shallow coal seams, which is simple and easy to implement , high coal mining efficiency and recovery rate, coal mining and filling coordination, etc.

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