SU1518519A1 - Method of traversing with a mechanized set a disjunctive disturbance of coal seam - Google Patents

Abstract

The invention relates to the development of coal in complex mining and geological conditions. The purpose of the invention is to increase the safety of work by increasing the stability of the roof in the lava with a hinged disjunctive violation on one of the drifts. The coal strips are excavated by the augers of the combine, changing the position of the lower auger from the ground to the height of the conveyor on a step and breaking through the step transition, which is cut along the entire length of the lava. The conveyor is installed on the line of the beginning of the transition diagonally. At the same time, the formation of a stepped transition is carried out in sections, within each of which the installation of the conveyor diagonally at each step from the hinge side violates the section of the lava length, determined depending on the width of the combine and the permissible mutual rotation angle the rest of the steps of the conveyor move to the bottom. During excavation, the lower auger is lifted up to the height of the conveyor by a step to the place where the conveyor is located near the bottom, after which the coal strip is pulled out while the lower auger of the combine is raised to the indicated height. At the same time, the excavation of each subsequent strip of coal is carried out with a successive reduction of its length relative to the previous strip by the length of the section of the lava with the installation of a conveyor diagonally from the hinge side of the violation. 2 Il.

Description

The invention relates to mining and can be used in the extraction of coal by long refining wells - in difficult mining and geological conditions.

The purpose of the invention is to increase the safety of work by increasing the stability of the roof in the lava with a joint hinge on one of the drifts.

Figure 1 shows the layout of the violation with respect to excavation drifts; Fig. 2 shows the schematic diagrams of the steps that form the connecting surface of the coal seam, respectively, when the length of the steps changes from the length of the refining slab to 1 (a) and when the length of the steps changes from 1 to the length of the clearing slab (b) .

In Figures 1 and 2, the following | notation is accepted: 1 — formation wing up to ipymeHHj 2 — shteki 3 — violation; 4 - seam wing after the breach; 5 - Interference violation; 6 - transition stages.

The method is carried out as follows; at once.

The plan transition plan is divided into three stages; output of the complex to the line of the beginning of the transition of the violation., direct transition of the violation and input of the complex into the extraction column. The number of steps 6 required at the stage of direct violation violation is defined as the quotient of dividing the amplitude of violation by g (Greek 2 by the maximum height of the conveyor to move to the stage when moving it. The width of this stage on the 1st river is defined as the product taken during the transition (Violations of the step width by the number of steps in the steps.

When the complex enters the line at the beginning of the transition, the combine removes the full coal strip and occupies the initial position. The conveyor is at a distance of the combine from the straight line. To form the first stage, the conveyor is installed diagonally at a length of 1 from the side of the hinge 5 a violation and pushed to the face at the remaining length of the complex. For a diagonal installation of the conveyor on length 1, the advancement of the hydraulic cylinders of the conveyor from zero to the maximum possible is uniformly varied. Combine 5 moving along the conveyor removes the coal strip, and the position of its lower auger is uniformly changed from the level of the soil at the beginning of the complex to the maximum possible value of the conveyor moving by one step. shifting by distance 1 from the start of the flläckca, leaving the other part of the complex, the magnitude of the screw displacement is constant. As a result, a step is formed in the soil, having d) opfiy pyramids of length 1 on the sides: s of a violation joint and a prism adjacent to its base on the L-thrust length of the step. The support sections for moving the weak roof in the zone of violation are moved immediately after the passage of the combine. If dumping of rocks cannot be prevented by this, then it is necessary;

methods that pre / 1 anticipate the dome: advanced fastening, chemical hardening, etc. When moving mechanized roof support to the section, it lowers and spreads, which, in advancing movement of the roof support section, for short distances, as it happens near the end of the stage, which has the shape of feasts, leads to the effect of trampling down the roof when it is shaken as a result of periodic descent. and the thrust of the upper lining almost in one place. This leads to a further deterioration of the roof, increases rock pressure. In order to avoid the effect of treading on the roof, the length of the next step is reduced by an amount of 1 from the hinge side of the violation. This step on length 1 from the hinge side of the violation is formed in the shape of a pyramid, adjacent its top to the base of the pyramid of the previous step, the rest of the step, as in the previous

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in the form of a pr-base of the pyramid of this stage. Similarly, the length of the next stage is reduced by 1 and the extreme part of the stage at length 1 with the CTopotai hinge is performed in the form of a pyramid, adjacent the apex to the base of the previous stage, the remaining part of the stage is reduced in the form of a prism. form only in the shape of a pyramid. This ends one stage of formation of steps. The next section is performed similarly to the first beginning with a step that has the length of the clearing face. Another order of step formation is possible, in which the step length in the period increases from 1 to the length of the clearing hole. From a technological point of view, these options differ in the direction of bending of the conveyor belt, which determines the opening of the gaps from different sides of the conveyor sections, as well as increased tension. respectively, of the downhole or destabilizing chain of the conveyor, and the need to start removing coal shavings from different ends of the refining intake, the steps in the shape of a pyramid constantly move along the length of the refining , along the length of the junction surface, each part of the sequence is broken.

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It comes with steps in the form of prisms, the number of which is one less than the sequence number of the step in the period to which the part of the step R forms the pyramid. Thus, over the entire length of the lava, except for the extreme part on the length 1 from the hinge side of the violation, the speed of advancement of the clearing face is high, not allowing the effect to develop. trampled roofing. On the extreme part of the lava on the hinge side of the violation, additional measures should be taken to strengthen the roof.

Claims (1)

Formula of the invention The method of transition by a mechanized complex of a disjunctive disruption of a coal seam, including the excavation of coal strips by harvesters of a combine, cutting a step transition along the entire length of the lava, installing a conveyor on the start line of the transition diagonally, translating the complex through a violation by a step transition, changing the position of the lower screw of the combine vertically from the level of the soil to the height of the conveyor thrust by a step, characterized in that, in order to increase the safety of work by increasing stability 8519 6 These roofs in the lava with a hinge of a violation on one of the drifts, the formation of a step transition is carried out in sections, within each of which the installation of the conveyor diagonally takes place at each step from the hinge side of the violation on the section of the lava of a length determined by the formula ten 1 r (- tg5), m where g is the adopted width of the combine in the process of transition and violation, m; О - permissible angle of mutual reversal of the conveyor sections in the horizontal plane, degrees, and on the rest of the stage, the conveyor is pushed to the bottom, during excavation, the elevation of the lower auger of the combine to the elevation of the conveyor on the elevation is carried out to the place of the conveyor at the bottom of the elevator, after which the coal strip is removed with the elevated lower auger of the combine to the specified height , while the excavation of each subsequent strip of coal produced with a consistent decrease in its lines in relation to the previous strip by the value of 1 from the hinge side of the arrest. Thebes. one Fi &. 2