METHOD OF LAYING OPEN FACE WITH EOLIAN SAND IN SHALLOW COAL SEAM IN WESTERN DESERT MINING AREAS Russian patent published in 2017 - IPC E21F15/00 E02D3/12 

FIELD: mining.

SUBSTANCE: method is proposed for laying an open face with eolian sand in a shallow coal seam in western desert mining areas that is suitable for a coal-mining face that has improved self-stabilization of the roof and has the ability to form an open face of a certain size in the back. With a small amount of work, including drilling from the earth surface into a shallow-lying coal seam and good flow rates of aeolian sand, drilling is performed on an open face formed after extraction of the working face, and the open slope is directly laid with eolian sand step by step before underground periodic loading so that the laying of the open face with eolian sand is provided. Since the occurrence of the coal seam in the west is shallow and there is a thick overlapping loose layer, as well as a thin rock foundation, the amount of work required for drilling is small, the costs are low and the construction cycle is short. In addition, the problems of destruction of the overlapping rock and sedimentation of the earth surface can be effectively solved, while eliminating the danger of breakthrough of water and quicksand, which reduces the impact on the environment of the western mining areas.

EFFECT: new technical approach is designed for the initial development phase in the western desert areas of China's mining works, and has a high economic efficiency of production, provides a reduction in investments in equipment and low cost of laying.

6 cl, 3 dwg