SU1740667A1 - Method of coal seam working - Google Patents

Description

working body of the excavation unit. In order to ensure the installation, dividing the overlap 11 can be mounted in separate strips 12, each of which is located above its gutter 6. The dividing overlap consists of a series of alternating logs 13 and I-beams metal beams fastened together with a rope.

To carry out the cleaning work, in each ditch 6 a excavation unit is installed, comprising a section of mechanized movable lining, a boom notch mechanism and an equalizer.

Prior to the start of cleaning work on the dividing overlap 11, a cushion of collapsed rocks is created, which contributes to a uniform smooth bypass of the dividing overlay to the coal pillars newly formed during the excavation process.

5 and c. Cleaning the coal in the diagonal bottom 7 at the same time as working out the mounting layer 10, advancing the latter by an amount that provides a margin of overlap length for pinching it with a rock cushion.

The extraction unit operates in a shuttle pattern and, moving along the bottom of the ditch

6 along the diagonal flank 7, conducts alternate excavation of coal in the soil of ditch 6 and in coal pillars 5 and 8. The height of the excavation layer of coal during one cycle of operation of the excavation unit must be the same in both ditch 6 and in pillars 5 and 8. After coal excavation in the pillars 5 and 8 there is a smooth lowering of the dividing overlap 11

by transferring the load to the support section, which lowers this overlap onto the newly formed pillars. As the diagonal hole 7 is advanced, the ventilation drifts are quenched and the separation overlap is increased, which, as it were, is bypassed after the cleaning of the diagonal cleaning hole 7. The proposed method can be used to extract coal on large-sized excavation areas along the strike , and in the fall of the reservoir. Moreover, when developing the underlying sub-floors, no new ventilation drifts are required, since their function is performed by the remaining conveyor drifts. The separation overlap can, if it is in a satisfactory condition, be used again.

The versatility and wide range of use allows the proposed method to be applied both on a gentle and a steep dip for thick and medium formations. Simplicity and reliability

while maintaining a high concentration and productivity of coal cleaning, it is possible to produce coal using a minimum amount of equipment of the same type.

The flow of work is due to the combination in time of cleaning work with works on the excavation of the installation layer and the build-up of separating overlap with subsequent transfer to the newly formed pillars, which increases the efficiency of coal mining. The proposed method is characterized by a small amount of development and maintenance of development workings, as well as the possibility of re-use of workings and dividing overlap.

Claims (2)

1. Method for developing coal seams, which includes mining the pillars and pillars with floors, working out the installation layer and forming a block in it, dredging the coal under protection and blocking it with a cross-inclined bottom and diagonal bottom between the ventilation and haulage drifts, maintaining the working space with powered support and transportation coal, characterized in that, in order to increase the efficiency of the method due to the possibility of expanding the field of application of the method on gentle formations, reducing the amount of application equipment and the volume of preparatory workings, as well as improving work safety while maintaining high performance, the excavations, the ventilation and haulage drifts are paired, the installation layer is worked out over the ventilation drifts by an inclined transverse face, in the diagonal bottom there are paired trenches, vents the drifts form the transitions into the paired ditches, and in the boards of the ventilation and haulage drifts and the ditches form coal pillars, on which the floor is placed before Over the overlapping, a rock pillow of collapsed rocks is formed, a clearing recess with a diagonal face is carried out simultaneously with the mounting of the installation layer with an inclined cross-face and overlapping, while the recess by the coal excavation unit is led in a diagonal bottom from the ditches using a shuttle pattern. 2. A method according to claim 1, characterized in that the separating overlap is formed from a series of alternating logs and I-beams that are fastened together with ropes. , 10 h- ;; about 1S 6 (bui.1 Aa 17 17 Fig.Z S-ff