SU831975A1 - Method of working thick gently sloping coal beds - Google Patents

Description

The invention relates to the mining industry and can be used to develop powerful flat coal seams'.

A known method for the development of powerful flat coal seams, which provides for the separation of the layer into layers [Ί].

However, this method is characterized by significant losses of coal.

A known method for the development of shallow coal seams, including carrying out preparatory workings that delineate the extraction pillar, and mining the seam with chambers leaving inter-chamber pillars and laying the mined-out chamber space with filling material and subsequent mining of inter-chamber pillars with the laying of the mined-out space after coal mining G21.

However, this method is characterized by insufficient efficiency.

The purpose of the invention is to increase the efficiency of development.

This goal is achieved by the fact that “preparatory workings that outline the extraction pillar are carried out along the seam at its roof, and when coal is extracted from the chambers and interchamber pillars, the layer is first excavated at the top of the seam and then the remaining coal thickness is mined back near the soil of the reservoir, and the laying of the worked out space is carried out simultaneously with the excavation of the remaining thickness of coal near the soil of the reservoir.

The method is as follows.

The seam is prepared by two drifts, which are conducted along the coal seam in its upper part. The drifts are interconnected by ventilation faults that outline the extraction column. The coal is mined first by primary chambers, the long axes of which are perpendicular or at some angle to the discharge and ventilation drifts. In each chamber, the upper layer at the top of the formation is initially taken out, in a direct way. Between the primary chambers, interchamber coal pillars are left with a width not less than the chamber width, the coal from which> is taken out by the secondary chambers. After excavation of the coal layer at the top of the seam, the remaining coal thickness at the seam of the seam is processed backwards, and the mined-out space is laid simultaneously with the remaining thickness coal near the soil of the reservoir.

The present invention can significantly increase the efficiency of the development of powerful flat coal seams.

Claims (2)

(54) THE METHOD OF DEVELOPING POWERFUL LAYOUS COAL STRUCTURES shuyus thickness of coal from the soil of the layer, and the laying of the developed space is produced simultaneously with the removal of the remaining thickness of coal from the soil of the layer. The present invention allows to significantly improve the efficiency of the development of powerful flat coal seams. The invention The method of developing powerful flat coal seams, including preparatory workings, surrounding the extraction column / and mining the chambers, leaving chamber chambers and filling the depleted space with a backfill material and subsequent working out of the chamber chambers with laying the depleted space after the coal, different the fact that, in order to increase the efficiency of development, preparatory workings, outlining the excavation column, are carried out along the formation at its roof, and when excavating coal chambers and intercameral pillars, first of all, the layer is excavated at the roof of the reservoir, then the remaining coal from the reservoir soil is retracted, and the spent space is laid simultaneously with the excavation near the soil layer. Sources of information taken into account in the examination 1. Improvement of systems for the development of powerful coal seams. M., Ugletekhizdat, 1959, p. 377. 2. USSR author's certificate number 262814, cl. E 21 C 1/04, 1967 (prototype).