SU1139847A1 - Method of mining thick coal beds - Google Patents

Abstract

A METHOD FOR DEVELOPING POWERFUL COALS, including excavation of the upper mounting layer, installation of a flexible overlap and its subsequent fit, and carrying out conveyor belts. ventilating excavation furnaces and inclined-transverse aisles, dredging the coal between these furnaces and the aisles with thin layers from top to bottom, deepening the inclined-transverse passes from top to bottom, retaining the flexible overlap between the aisles, in order to increase efficiency development due to the elimination of losses of repulsed coal over the area of the working space, a layer of coal is temporarily left on the soil of the reservoir, which is removed by the clearing face with the inclination of the inclined-transverse passages by the size of the zone of active displacement of the collapsed rocks, and the broken coal during the mining of the mining face with oblique-transverse passages partially remains (LWH over the area of the worked-out space under the flexible overlap and release as the layer develops .

Description

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The invention relates to the mining industry and is intended for the development of thick coal seams.

There is a method of developing thick coal seams 1.

However, the known method is characterized by insufficient efficiency.

There is a known method of developing thick coal seams, including excavation of the upper installation layer, installation of flexible overlap and its subsequent landing, carrying out conveyor, ventilation extraction furnaces and oblique-transverse passageways, excavation of coal between these furnaces and passages in thin layers from top to bottom, and deepening obliquely -transverse passages from top to bottom, holding the flexible overlap between these passes 2.

However, this method is also characterized by insufficient efficiency due to the loss of coal in the area of the goaf.

The purpose of the invention is to increase the efficiency of development by eliminating losses relative to the fallen coal over the area of open space.

The goal is achieved by the fact that according to the method of developing thick coal seams, including the excavation of the upper installation layer, the installation of flexible overlap and its subsequent landing, carrying out conveyor, ventilation extraction furnaces and inclined-transverse passages, excavation of coal between these furnaces and passages of thin layers plots from top to bottom, groove of oblique-transverse passages plots from top / down, keeping flexible overlap with pillars between these passes, at the soil of the formation temporarily, leave a layer of coal that is removed They have a clearing face lagging behind the bottom with inclined-transverse passages by the size of the zone of active displacement of the collapsed rocks, and the broken coal when processing the layer by cleansing face with inclined-transverse passages is partially left over the developed space under the flexible overlap and release as the layer is worked out the soil of the reservoir in front of the lining on the conveyor.

The method is carried out as follows.

Initially, the upper layer works, the flexible overlap is erected and the roof is collapsed, after which the coal is prepared under the flexible overlap.

The preparation of coal stocks under flexible slabs for mining is carried out by dividing them into excavation layers, for which ventilating extraction stoves are directly closed under the flexible tunnel from the conveyor tunnel.

overlapping or leaving a bundle of coal underneath the conveyor layer ac at the reservoir soil — conveyor extraction furnaces over coal with a distance from the reservoir soil equal to or somewhat greater than the thickness of the temporarily left and uncut cut coal at the soil and with some displacement from the relative vertical axes excavation furnaces or in their alignment. At the same time, on the border of the excavation area, excavation furnaces

 they are interconnected by inclined-transverse grooves, which are held at an angle of 38-45 °, which ensures the gravity of the coal. In addition, the cleaning surface of the pillars of coal between the inclined-transverse grooved passages imparts a slope to the horizon equal to the angle of inclination of the oblique-transverse grooved passages.

Preparation of coal reserves, temporarily left in the layer near the soil, is carried out by conveying the ventilation and conveyor furnaces from the conveyor drift, which knock down the ventilation drift, and the ventilation tongue is reequipped under the mounting chamber and thus create a seam face from the soil with separate ventilation and transport to conveyor brush.

When technically necessary, the ventilation extraction furnaces will be equipped with fastener mats, transmitted platforms, as well as winches and

 drilling holes.

Conveyor extraction furnace equip

reloaders, fasteners,

conveyors and means of drilling holes.

Extraction work begins with deeper or inclined-transverse passages, for example, by drilling from mobile platforms and blasting holes to a technically necessary depth, bottom-up sections of the entire length of the inclined-transverse passage-a.

Coal repulsed during the deepening of inclined-transverse passages, by gravity flows to the loaders and transferred to the conveyors.

5 After deepening the oblique-transverse passages by a technically necessary amount and creating a constantly supported compensation-accumulating space, the pillars of the coal are dug between the oblique-transverse grooved passages.

The wind of the coal of a technically necessary thickness in the direction from the flexible overlap to the soil is carried out in several steps in the following sequence of their execution.

From the oblique-transverse excavation passages from the mobile platforms, the hole of the hole of the bore-hole with two sides of the voyage1)

pillars to the technically possible height and length of the pillar, starting from the top down in sections or immediately to the entire length. From the same mobile platforms, the holes are drilled and then blown up in several steps, starting from the top down, with sections whose dimensions are determined by technical calculation from the condition of placement in the compensation accumulating space of the excavation passage that was beaten off at one time by the coal. Due to the forces of gravity, coal blasted off by explosives enters the compensation-accumulating space of oblique-transverse passages and, through it by gravity, goes to loading cranes and then is transferred by conveyors to conveyors. Following the movement of the coal, the flexible overlap is lowered under the action of the collapsed rocks and lies on the pillars of the coal, preserving in working condition the cross sections of the excavation passages, which are used for airing and working on the next strip along the entire clearing face line in the described sequence, starting from the depth excavation passages.

Excavation of a layer of coal temporarily deposited on the soil and repulsed during the development of the reserves of the pulling out layer of the clearing face and mafiamed

the areas of the excavated space from the post are driven downwards with a conveyor belt. Moreover, as the strip of coal left behind the soil is excavated, the crushed coal and the gasified coal gradually pass by gravity onto the conveyor in front of the strip with a strip equal to the length of the hemming by the excavation machine at one time. Coal from the clearing site is delivered to the conveyor drift along the conveyor furnace.

The cleaning works in the bottomhole are lagging behind the cleaning face, with oblique-transverse passages by the size of the mold of active movement of the collapsed rocks plus the safety zone.

The proposed method makes it possible to eliminate losses of repulsed s (head in the developed space and thereby reduce the likelihood of endogenous fires, as well as to ensure reliable isolated ventilation of all three clearing faces due to general depression and good isolation of clearing bottoms from each other in critical situations. At the same time, the maximum concentration of cleaning and preparatory work is achieved, and thus significantly increases the efficiency of developing coal seams while reducing coal losses.

Claims (1)

METHOD FOR DEVELOPING POWERFUL COAL PLASTICS, including excavation of the upper mounting layer, installation of flexible overlap and its subsequent planting, conveyor, ventilation extraction furnaces and inclined-transverse passages, coal excavation between these furnaces and thin-section passages with sections from top to bottom, and an inclined-transverse deep passages in sections from top to bottom, keeping flexible overlapping by pillars between these passages, characterized in that, in order to increase development efficiency by eliminating losses of beaten coal the area of the worked out space, a layer of coal is temporarily left near the formation soil, which is removed by a working face with a lag from the bottom with oblique-transverse passages by the size of the zone of active displacement of collapsed rocks, and beaten coal during mining of the layer by a working face with oblique-g-transverse passages partially left over the area of the worked out space under a flexible overlap and released as the layer is developed near the soil of the formation, in front of the lining on the conveyor. SU. „. 1139847