RU1801171C - Method for mining steeply dipping thin vein deposits with bulge - Google Patents

Abstract

Usage: when mining steeply complex structural thin and low power with sections of the blowing to increase the efficiency of mining by reducing the volume of preparatory cutting operations by increasing the front of work in the block. The essence of the invention: mining of the block is carried out by a system of sub-floor collapse with a tab from the flank sections to the central section with a blown core, delivery of the broken ore is carried out to the general block uprising - ore discharge carried out in the central section of the block, at the moment of reaching the front of the central section, the ore breaking is temporarily stopped and there is a sub-floor drift and a temporary uprising - an ore pass in the center of the blow-up, which is extinguished as the overlying sub-floor is worked off with two layers being defended from preparation sub-floor to work out. 10 ill. with C

Description

The invention relates to the mining industry and can be used in the development of steeply falling complex structural thin and low power conductors with blowing areas.

The purpose of the invention is to increase the efficiency of mining by reducing the volume of pre-cutting operations by increasing the front of work in the block.

According to the invention, the goal is achieved in that by a method of working out steeply falling complex structural vein meltbeds of low power, including driving floor and sub-floor drifts, flank side risers, preparing the bottom of the block for the subsequent release of the beaten ore and mining the block by selective breaking of ore with the laying of sapodic rocks treatment space with the formation

sub-floor drifts in low-power areas, delivery of broken ore by sub-floor openings to the ore discharge, when mining a low-power section of a block with a sub-floor caving system with a narrow treatment space being laid with blasting enclosing rocks and a central section with a sub-caving system blown with ore storage use a unified preparation scheme block to the treatment ditch, and the system of sub-floor caving ore with a bookmark initially mine the block from the flank sections to the center blown ore with the delivery of beaten ore to the general block uprising ore pass, passed in the central section, at the moment the front of operations of the central section of the first (lower) layer is reached, ore breakdown is temporarily stopped and

00

about

with

by driving a sub-floor drift through this section, a second (middle) layer (sub-floor) is prepared for mining, then the flank sections are connected to each other and a temporary uprising takes place - ore discharge in the center of the blow-up with its subsequent repayment as the overburden sub-floor of the central section with blow-off is worked out an underground storey collapse with ore storage, where ore is mined when a sub-floor drift is performed to mine the overlying third (upper) layer (sub-floor) with a two-second lag a substage of being prepared for mining.

A comparative analysis of the claimed solution with the prototype shows that the claimed method differs from the known one in that when mining a low-power section of the block with a sub-floor collapse system with laying of a narrow treatment space with blasting host rocks and a central section with an inflated sub-floor collapse system from shops

ore mining use a single scheme

the preparation of the block for the treatment ditch, and the system of sub-floor collapse of the ore with the laying initially produces the block from the flank sections to the central one with blowing with delivery of the beaten ore to the general block uprising - ore passing in the central section, at the moment the front of the central section of the first ( of the lower) layer, ore breaking is temporarily stopped and a second (middle) layer (sub-floor) is prepared for mining by a sub-level drift in this section, after which they are interconnected The ng sections of this layer are used for transport communication between the sub-floors and a temporary uprising - ore discharge in the center of the blow-up and its subsequent repayment as the mining-up-level sub-floor of the central section with a blow-up system of the under-floor collapse with ore storage is carried out, where ore is mined . when driving a sub-floor drift to drill the overlying third (upper) layer (sub-floor), ensuring that two layers are behind the sub-floor prepared for mining. Thus, the claimed method meets the criterion of novelty. A technical solution is known in which the block was initially mined from flanking sections to the central one with a blown system of sub-floor collapse of ore with a tab. However, the development of the specified system using individual development for this system

5 15

. 0

5

0 5 i ;. 0 5 0 5

The scheme of preparing the block for the treatment dredging contributed to an increase in the volume of preparatory and cutting operations due to the passage of uprising - ore passes for each site. In the claimed method, the application of a single preparation scheme for the entire block worked out by two development systems reduces the volume of preparatory cutting operations by delivering the beaten ore from flank sections to the general block uprising - ore passing in the central section, thereby increasing the front of operations in block, contributing to the improvement of mining efficiency.

The essence of the proposed method consists in the use of a unified scheme for preparing a block of a deposit with a complex structure for working out low-power flank sections of a block with a sub-floor collapse system with laying of a narrow treatment space with blasting host rocks and working out the central section of a block with a core blown sub-floor collapse system with ore storage and ore delivery from the entire block to the block ore discharge - uprising, passed in the center of the blowing area with its subsequent repayment as it progresses cleaning operations in the block from bottom to top.

Fig. 1 shows a section along the strike of a block, including a blowing section and a low-power flanking section, at the beginning of the treatment work in the block; figure 2 is a sectional view of a block across the strike of a deposit along a low-power flank section; Fig. 3 shows a section through a block across the strike of a deposit along a low-power central section of a blown block; Fig. 4 is a sectional view of a block along strike of a deposit at the stage of mining low-power flank portions of a block of the first (lower) layer (sub-floor); Fig. 5 is a sectional view of a block along strike of a deposit at the stage of completion of treatment work on low-power flank sections of a block of the first (lower) layer and preparation for mining the second (middle) layer (sub-floor); in Fig.6 is a block plan, including flanking low-power sections of the block and the central section with a blow with a block rebellion passed through it - ore discharge; Fig. 7 is a sectional view of a block along strike of a deposit at the stage of starting mining a low-power flank section of a block of a second (middle) layer and beginning to prepare for mining a third (upper) layer; Fig. 8 is a sectional view of a block along strike of a deposit in the stage of drilling an array of a central section with blowing of the first (lower) layer, we finish working out the low-power flanking section of the second (middle) layer and prepare for working out the third (upper) layer; Fig.9 is a sectional view of a block along strike of a deposit at the stage of completion of mining of the central section with blown the veins of the first (lower) layer to form a chamber with gas -melt ore, completion of mining of a low-power flanking section of the second (middle) layer and completion of preparation for mining the third (upper) layer; Fig. 10 is a sectional view of a block along strike of a deposit at the stage of beginning development of a low-flank section of the third (top-) layer (sub-floor) and the beginning of preparation for mining an overlying sub-floor.

The method is carried out as follows.

The preparation of a block with a complex vein bedding structure is carried out in such a way that section 1 with high power (blown) is located in the center of the block between the flanking low-power sections. The floor drift 2 and the sub-floor drift 3 of the first (lower) layer pass through the entire length of the block, the bottom of the block is prepared by the passage of the retracting orth-races 4 for the subsequent release of the beaten ore, after which the block ventilation rebellion 5 on the flanks block. Then proceed to ref. a botke of low-power flank sections of the block with a system for developing sub-floor ore collapse with the laying of a narrow treatment space by enclosing rocks 6, which are blasted from the sub-floor drifts 7, which pass when mining flank low-power sections of the first (lower) layer (Figs. 1, 2, 3). The passage of sub-floor drifts 7 and the development of low-power sections are carried out in the direction from the flanks of the block to the center. At the moment the front of operations of the central section 1 with blowing is reached, the ore breaking is temporarily stopped and the flank sections of the second (middle) layer are interconnected by the oncoming penetration of the floor drifts 7, after which a temporary uprising - ore discharge 8 in the center of the blowing channel for transporting zi between sub-floors (Figs. 4, 5). The ore beaten in the block is supplied to the general block uprising - ore pass 8, which is located in the center of the blowing area, but at the ore contact with the host rocks (Fig. 6). After that, sub-floor drifts 9 of the third (upper) layer (sub-floor) pass from the flanks of the block towards each other and pass flanking low-power sections of the second (middle) layer with a system of sub-floor collapse with

the laying of the treatment space undermined by the host rocks (Fig.7). For conditions, the filled ore at the bottom of the block is frozen by pre-irrigation with water to ensure safe conditions in the bottom of the block. Simultaneously with the excavation of the sub-floor drift 9, the ore reserve of the central section 1 of the blowing of the first (lower) layer is drilled with deep wells1 10 (Fig. 8). The development of this section by the sub-bias caving system with ore ore grading is carried out after preparation for the development of the third (upper) layer (Fig. 9), i.e. with a gap of two layers from the sub-floor being prepared for mining, Then the ore beaten in the third (upper) layer is delivered via a sub-floor drift 9 to the uprising - ore launch 8, from which it comes from the store-chamber 11 formed as a result of mining the central section 1 of the lower sub-floor (Fig. 10). In order to carry out the next-cycle of cleaning operations, the block undergoes a floor drift of the overlying fourth layer (sub-floor). The height of the layer is determined by the condition of effective fine-skinning breaking of a thin section of the core. As the cleaning work progresses upwards, the height of the magazine-shop 11 increases. At the end of the mining of the block, the stained ore is discharged through hatches installed in the returning orthic-races 4, loaded into wagons, and transported to the ore-producing shaft of the mine.

On the permafrost horizon +582 m, to implement the claimed method, blocks No. 410,408,406 and 404 were combined into one block.

Applying the claimed mining method for the combined block 404-410 and the unified preparation scheme for mining low-power flank sections with a sub-floor collapse system with laying of a narrow treatment space with blasting enclosing rocks and a central blown section with a sub-floor collapse system with ore mashing, it turned out that with the same ore reserve, the total length of the pre-cut workings decreased from 2196 m in comparison with the mining method used at the mine to 1350 m, specific the gathering of preparatory and cutting operations was reduced from 1803 m / 1000 t to 11.2 m / 1000 t, the labor productivity of the worker in the block increased from 3m3 / shift to 8 m3 / cm, the cost of ore mining in the block decreased from 20 rubles / t to 8 rub / t

Claims (1)

Using the proposed method for developing a complex structural low-power vein reservoir in comparison with the prototype provides the following advantages: reduction in the volume of pre-cutting work by increasing the front of work in the block due to the use of a unified training scheme in areas worked out by sub-floor development systems with an enclosed treatment space rocks and with storing and due to the simplification of transport communication between the flank sections of the block and between subfloors by lagging behind work of the central section of the blasting in two layers from preparation for the development of low-power flank sections, an increase in labor productivity and a cleaning excavation due to an increase in the front of work in the block, as a result of which the cost of mining ore in the block has decreased, the improvement of working safety conditions due to the greater stability of the block due to less the number of preparatory rifling workings. These advantages increase the overall efficiency of mining ore reserves in the block. SUMMARY OF THE INVENTION A method for developing steeply dwelling low-power vein deposits with the blowing of a deposit, including preparation blocks by driving floor and sub-floor drifts, flank block risers and ore passages, preparing the bottom of the block, mining blocks by sub-floor collapse, selective ore breaking, laying 04HcYHoro space by rocks from undermining in sub-floor drifts, ore delivery by sub-floor drifts to ore discharge and release characterized in that the preparation of the blocks is carried out with the location of the blown deposits in the center of the block, sub-floor collapse of the ore with the laying of the worked-out space by the rock is carried out initially t of the flanks of the block to the central part with the core blowing in the lower sub-floor, the flanks of the lower sub-floor block are worked out to the blown deposit section and the overlying middle sub-floor is prepared in this section, then the flank sections of the overlying sub-floor are knocked together by oncoming 1-story tunneling. drifts of this “sub-floor” and pass a temporary ore discharge in the center of the core blow-up, after preparing the next upper sub-floor, the central part is worked out with a core blow on the lower floor with ore ore storage, while the temporary ore discharge is extinguished. .fig. 1 FIG. 2 fig.Z figure 5 F112, 9 fig.Yu