SU909176A1 - Method of working thin and medium-thick coal beds - Google Patents

Description

(54) METHOD FOR DEVELOPING THIN AND MEDIUM POWER OF COAL STRAYS

one

The invention relates to the mining industry and can be used in the development of thin and medium thickness coal seams.

There is a method of development of coal seams, including the delineation of excavation pillars preparatory workings and the subsequent development of the pillars, leaving the pillars of coal between the pillars 1.

There is also known a method of developing thin and medium thickness coal seams, which includes preparation of excavation pillars by carrying out transport and ventilation pits for each pillar with delineating barrier pillars between the pillars and working the pillars with clearing holes with the roof collapsing in the developed space 2.

However, both of these methods are characterized by significant losses of coal in the pillars, as well as unfavorable conditions for transporting coal along the bottom.

The purpose of the invention is to reduce coal losses and improve the transportation conditions of the latter along the bottom.

The goal is achieved by the fact that the excavation pillars are located diagonally to the strike line of the reservoir and simultaneously with the cutting of coal in the bottom of the excavation post and, after the bottomhole, produce a hydraulic excavation of the barrier pillar from the ventilation drift diagonally rising in the plane of the reservoir relative to the specified drift with the bypass of the pulp from the stopovers, Q along the chest of the bottom to the traffic drift.

The drawing is a mine management scheme.

The method is as follows.

When developing a thin or medium thickness flat or sloping coal seam, excavation columns 1 are prepared by conducting transport 2 and ventilation 3 shchrek. When preparing poles that are diagonally aligned with the strike line of the reservoir, windows 20 are tied down with ventilation plugs 4 pillars. Pillboxes 5 and 5 pillars take away the pillars 5. Clearing columns 6 work the plow 7, leaving tape supporting pillars.

Claims (1)

Claim The method of developing thin and medium 20 coal seam thickness, including the preparation of excavation pillars by carrying out transport and ventilation drifts for each pillar with the contouring of pillars between the pillars and mining the pillars with casing faces with roof collapse in the worked out space, characterized in that, in order to reduce coal losses and improve the transportation conditions of the latter along the bottom, the extraction columns are located diagonally to the strike line of the formation and at the same time as the coal is blasted into the battle of the extraction pillar and after the slaughter, hydraulic excavation of the barrier pillar from the ventilation drift diagonally rising in the plane of the reservoir relative to the indicated drift and the bottom line with passages bypass pulp from the pass along the bottom of the face to the transport drift is carried out.