SU899953A1 - Method of mining thick sloping coal beds in horizontal layers - Google Patents

Description

one

The invention relates to the mining industry and can be used in the development of thick steep coal seams with horizontal layers using mechanized complexes.

The known method of development is powerful} 5 steep seams with the use of flexible overlap with intersection of subsurface strata 1.

However, this method is very labor intensive.

There is also known a method of developing high-power steeply dipping coal seams with horizontal layers using mechanized supports and flexible overlap, including making drifts in the loosened layer near the roof or near the soil of the reservoir, working out the yielding layer by clearing the bottomhole simultaneously with carrying out the preparatory face of the underlying layer on the opposite side of the overlying roadway, securing the interface of the cleaning and preparatory faces 2. JQ

However, this method is characterized by insufficient development efficiency and safety of mining operations.

The purpose of the invention is to eliminate these disadvantages.

This goal is achieved by the fact that the drift of the underlying layer is lagging behind the cleaning hole by the length of one section of the support, and the interface between the cleaning and preparatory faces is removed from the cleaning works zone and is fastened in the developed space under a closed flexible floor.

The method is carried out as follows.

Claims (2)

The scooping field is prepared by an exact and ventilating field drift, conducted in the recumbent rock formations, which are interconnected by flanking slopes of the rock. Intermediate yards are carried out with the slope on the formation. First, an insulating strip is held under which the horizontal layer is removed, and a mounting layer is worked out at the roof of the reservoir with long columns along the strike; a flexible metal overlay is mounted on the soil of the horizontal and mounting layers. Under the protection of flexible overlap, subsequent horizontal layers with a capacity of 3-4 M are worked out using mechanized complexes. The development of the overlying layer in the forward direction is carried out under flexible overlap after making a drift in this layer for the full block length at the top of the formation. Simultaneously with the development of the overlying layer, with a lag of one section of the lining, the underlying layer is drifted near the soil of the formation. The interface between the cleaning and preparatory faces is taken out of the treatment area and is fastened in the developed space under the protection of a flexible ceiling. In the conductor gap, a metal lining inventory is set up. In subsequent layers, the strata is alternately located at the roof and the soil of the formation. This method will significantly improve the development efficiency and safety of mining operations. The invention The method of developing powerful steeply dipping coal seams with horizontal layers using mechanized roofing and flexible overlap, including making a drift in the overlying layer near the roof or near the soil of the reservoir, working out the overlying layer with a mining face simultaneously with conducting the preparatory face of the lower layer with the opposite layer. , securing the interface of the clearing and preparatory faces, characterized in that, in order to increase the efficiency of the development and mining hazards, schtrek underlying layer is carried out with a lag of longwall the length of one section lining, and interfacing preparatory cleaning and removal faces from zone cleaning work is carried out and its mounting in the goaf protected flexible overlap. Sources of information taken into account in the examination 1. USSR author's certificate number 375378, cl. E 21 C 41/04, 1970. 2. USSR author's certificate in application number 2079019, cl. E 21 C 41/04, 1974.