SU916757A1 - Method of working thick coal beds - Google Patents

Description

The invention relates to the mining industry and can be used prd the development of powerful coal seams with a variable angle of occurrence.

There is a method of developing powerful flat and inclined coal seams using a flexible crossover, digging I1].

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

There is a method of developing powerful coal seams, which includes carrying out preparatory workings, working out the installation layer at the hanging side of the reservoir, laying the flexible overlap and subsequent excavation of the remaining coal with successive transversely inclined stalbavi from the flexible overlap to the recumbent side of the formation with the formation of an end passage [21.

However, the known method in its application on seams with a variable angle of occurrence is also characterized by large losses of coal.

The purpose of the invention is to reduce the loss of coal in seams with a variable angle of occurrence.

"

This goal is achieved by the fact that the notch of each transversely inclined column is conducted with a temporary

5 leaving the coal pillars near the soil of the reservoir, each of which is worked out by the fall of the reservoir from the end passage to the preparatory development.

Yu In FIG. 1 shows the scheme of mining; FIG. 2 is a section A-A · FIG. on fig.Z - section BB in figure 1; figure 4 - section b — b in figure 1. *

The method is as follows

in a way.

When developing a thick formation with a variable angle of occurrence, the assembly layer is dredged, on the basis of which flexible overlap 1 is laid. After this, the remaining coal strata are prepared with pb transversely inclined columns. To do this, the soil of the reservoir conduct transporting furnaces 2, of which are drilled in advance

40'en horizon spend

in the side of the hanging side

3. Horses under the overlap connect

horizontal passages 4. Each

30 fifth ort equipped as *

3

916757

four

walker. Then through the entire length of the block for ventilation of the face, they are carried out through the connection 5. The face of the transversely inclined column 6 is located at an angle of 40 ^° and is worked in the direction from the roof to the soil of the formation. Due to the fact that the dip angle of the reservoir is always less than 40®, the transversely inclined column, the bottom of which, from the condition of gravity flow of coal flows at an angle of 40-45®, is not possible to work up to the recumbent side of the formation due to the lack of gravity flow of crushed coal and the need to maintain transport furnaces and ensuring the operation of the conveyors until the coal is completely excavated, the pillar 7 of the coal is temporarily left at the seam soil. Then the excavation of this pillar is produced by the fall of the reservoir with coal blasting from the end passage 8 to the transport furnaces 2. The broken coal is transported along the fall by means of conveyors 9. As the pillar excavation is done, the conveyors are shortened.

The invention will significantly reduce the loss of coal in the development of thick coal seams b variable angle of occurrence.

Claims (2)

Claim The method of developing powerful coal seams, including the conduct of development workings, mining 5 mounting layer at the hanging side of the plate, the laying of flexible overlap and the subsequent excavation of the remaining coal with successive transversely inclined columns in the direction from 10 flexible overlap to the recumbent side of the reservoir with the formation of an end passage, characterized in that, in order to reduce coal losses on reservoirs with a variable bedding angle, the excavation of each transversely inclined column is carried out with the temporary abandonment of the coal pillars near the soil of the reservoir, each of which is worked out face formation 2 "passage to the preparatory development.