SU734420A1 - Method of mining inclined ore deposits - Google Patents

Description

The invention relates to the mining industry and can be used in the underground mining of inclined ore deposits. A known method of underground mining of inclined ore deposits is that the ore deposit is mined using portable processing (hand drills and skr & rivet plants) primary and secondary chambers located along the pad with the filling of the primary chambers with a hardening bookmark solution, and secondary gidrokakladkoy U. However, with this method, it is impossible to use modern high-performance self-propelled equipment instead of portable equipment, since the angle of inclination is. chambers more than 25 and self-propelled machines only up to 12 can tilt 14. Also known are the development of oblique ore deposits, including mining of mega; blocking; The disadvantages of this method are relatively low concentrations of mining, labor productivity and efficiency of using self-propelled equipment. The purpose of the acquisition is to increase the development efficiency by increasing the concentration of mining operations, labor productivity and the efficiency of using self-propelled equipment. The goal is achieved by the fact that the ore in the block is beaten simultaneously along the entire height of the floor along the strike in one direction, and the bottom line when moving the primary chambers is placed in the same vertical plane, and the primary chambers are laid with a hardening mixture at a distance of the bottom natural slopes si, and the bottom line of the secondary chambers lags behind the line of the bottom chambers of the primary chambers at a distance at which the tab of the primary chambers hardens. The drawing shows the plan of mining operations in the block for explanation of lagav- MY way. The ore body is processed to the full height of the floor by primary and secondary chambers 1 and 2, which are located inclined, the faces of which are stirred along two lines to fall at a certain distance from each other. On one line have the faces of the primary chambers, on the other secondary. Tilt angle of chambers 1О-12 to the horizon. In the primary chambers 1 place a hardening tab 3, and in the secondary chambers 2 - waste rock or hydrocacres 4, or both. For the preparation of the chambers, field transport drifts are interconnected by inclined broken congresses 5, as well as arrivals 6 into the group of chambers and ore passes from the recession horizon. Through all the intergrowth pillars, ore and man-made, wells 7 are drilled or bleed instead. The floor is divided into a sub-floor with intermediate floors and ore drifts. 8, Opposite-way, underground section; The development of inclined ore deposits is as follows. In front of the clearing pit, i.e., in front of the line of primary chambers, in the rocks of the recumbent side, field transport drifts, which periodically, for example, 200 m along the strike, are knocked down by inclined broken slopes 5, last pass from the haulage to the ventilation, on which self-propelled machines rise into the chambers. Each element of the ramp has an angle of inclination to the horizon, equal to 1O-12 Of the traffic drifts, for example, 70–100 m pass along the route of the intermediate mine and 8 for the group of chambers in the sub-floor, and from the horizon , for example, through 5O-10O m along the strike ore passes. All field workings are carried out with the help of self-propelled equipment on a pneumatic tire with a diesel engine. Waste rock from the excavation of field workings is delivered by loading and hauling machines along transport drifts to secondary storage chambers. The rock cutting in the field workings is carried out by drilling and drilling. The faces are ventilated with fans of the local distributor. Following the advance of the field preparatory workings, the primary chambers and intermediate drifts 8 are propelled along the strike, the faces of which interfere along the straight line by dropping to the entire height of the floor from the ventilation drift to the haulage. The undermined roof is supported in the borehole space between the dimensional and ore pillars. The tilt of the cameras to the horizon is 10-12 °. The faces of the primary chambers are advanced relatively simultaneously. Ore take away-. they are drilling with the drilling method. Ore is mined and transported with the help of self-propelled equipment, for normal operation of which the roads are laid in chambers with soil undermining, Pogruzochno.-transport vehicles with ore follow from chambers to intermediate drifts 8, then to races 6 and transport drifts to ore passes, where the ore is dumped for further loading into vehicles on the haulage horizon, and the rock is removed from the soil in the chambers and transported through the traffic drifts to the secondary chambers. There are up to four chambers in each substage. , Which runs a separate complex. The loading of the complex is maximized due to the diverse scheme of operation. Chambers on the Measurement Motion bring down on the inserted drift 8, and from the downstream they see new ones. Inter-chamber pillars periodically, for example, 5 m are drilled through ventilation holes or punctured. Airing the chambers by exaggerating depression apart from each substage according to the following scheme. Fresh air (solid arrow) in each substage comes from the hauling horizon through the front field exit 5, the traffic drift and the check 6 on the intermediate drift 8, from where it rises cameras, where, pressing to the bottom, aerates them. Then, through the boreholes 7, the air is removed into the through chamber punched into the upstream

uirpeK 8, according to which the outcome of the stream (dotted arrow) follows the rear: ride b and exit 5 to stretch the valve horizon to the valve. A network of jumpers or doors 9 is installed to organize the ventilation.

Following the progress. the bottomhole lines make filling of the released primary chambers with a solution of hardening bookmark, for which in pipe workings 5 and 6, slurry lines are laid along the transport drift and in the final work 8. Then, in the hardened zone, the bookmarks advance along the strike the faces of the second chambers 2 also located along a straight line along the fall. The blasting technology and the ventilation of the secondary chambers are carried out in the same way as the primary chambers.

The undermined roof in the bottomhole industry is supported by interchamber artificial pillars. Following the engagement of the secondary chambers, as they are released, the waste rock is stored in them to enhance the carrying capacity of the inter-chamber artificial pillars from the hardening tab. If, under the conditions of rock pressure control, even more force is required from these pillars, then in addition a hydraulic installation is provided.

The laying in the primary and secondary chambers lags behind the bottomhole by an amount that is less than or equal to the maximum span of the natural balance for these rocks. The line of the faces of the secondary chambers is positioned from the line of the faces of the primary chambers at such a distance that the hardening tab has time to grasp and gain the necessary strength by the time the approach of the faces of the chambers of the secondary chambers. This distance is set depending on the received speed of moving faces and the time of setting the bookmark.

The proposed method of working out allows to increase the number of chambers, the total length of the bottoms of which in one cleaning unit is inclined above the floor, which cannot be achieved in a known method. Consequently, the number of caN-equipped equipment complexes and the volume of the ore in the floor at refraction by the proposed method, ceteris paribus, is significantly

more than in the sub-floor when working out a well-known sport:; In addition, the presence of a large number of cameras makes it possible to operate ca sox machinery in many ways, which improves the efficiency of their use.

The cnocoff of underground mining of inclined ore deposits, which is described, provides the development of floor reserves with a flow technology based on the lav-floor principle with a high concentration of mining, increasing workers' labor productivity, and reducing the cost of ore mining.

Claims (2)

Invention Formula A method for developing inclined ore deposits, including mining a blockade with dividing ethanol in a block into sub-floors, sinking transport workings in recumbent rocks, excavating ore in sub-floors with primary and secondary inclined chambers and setting the primary chambers with a hardening mixture, characterized in that the purpose of increasing the efficiency of development by increasing the concentration of mountain works,% of labor productivity and the efficiency of using self-propelled equipment, the ore in the block is beaten off simultaneously in she sees the floor along the strike in one direction, and the bottom line when moving the primary chambers are placed in the same vertical plane, and the primary chambers are laid with a hardening mixture at the distance from the bottom faces, replacing the span of the natural balance, and the secondary walls of the secondary chambers lag behind the primary faces chambers at a distance at which the tab of the primary chambers hardens. Sources of information taken by you in the examination 1, USSR author's certificate No. 205772, class, E 21 C 41/06, 1966, 2. Gusarev MI and others. The main directions of development systems. On the North Ural bauxite mine. Mining Journal, No. 10, 1974, p. 17-20 (prototype).