RU2193660C1 - Method of underground mining of steeply dipping vein deposits - Google Patents

Abstract

FIELD: mining. SUBSTANCE: method includes driving of haulage and vent drifts, upward mining of ore in chambers and ore haulage to haulage level by gravitation. Brest stoping of ore is carried out with the help of drilling unit in ore body with parallel filling of adjacent mined-out chamber with monolithic hardening fill. In this case, lagging of slope L behind level of fill in adjacent chamber is determined by formula L=V_dr.•t_selt. m, where V_dr. is drilling rate, m/shift; t_selt. is fill setting time, shift. EFFECT: complete extraction and higher efficiency of stoping operations. 2 dwg

Description

 There is a method of developing steeply dipping vein deposits by a system with ore ore storage in a treatment space with small-hole blasting and subsequent ore release to the return horizon (Agoshkov M.I., Malakhov G.M. Underground mining of ore deposits. - M .: Nedra, 1966, p. 332-337). To prevent the collapse of the rocks of the hanging side after mining the reserve and the release of all staged ore, the chamber is filled with filling material.

The disadvantages of this method are:
- the cyclical organization of work in the working face, including the drilling of ascending holes, their loading and blasting, ventilation of the treatment space and the partial release of broken ore;
- finding people in the treatment space of the chamber during operations of the production cycle;
- the duration and complexity of drilling holes and their loading with explosives in cramped conditions of the treatment space;
- unproductive loss of time to air the unit after blasting;
- the impossibility of combining operations for drilling holes and the release of broken ore;
- low labor productivity of the working face;
- capital deadening due to the storing of most (70%) of the recaptured ore for the period of mining the block’s chamber stock.

 The objective of the invention is to remedy these disadvantages by creating a deserted in-line technology for ore extraction, ensuring the completeness of extraction and high efficiency of treatment operations in the development of vein steeply dipping deposits of valuable ores.

The problem is solved in that, in a method of underground mining of steeply dwelling vein deposits, including the excavation of the haulage and ventilation drifts, the upward excavation of ore in the chambers and its delivery to the haulage horizon under the influence of gravity, they conduct continuous continuous excavation of ore by the drilling unit through the ore body with parallel filling of the adjacent waste chamber monolithic hardening tab, while the lag of the working face L from the level of the tab in the adjacent chamber is determined by the formula
L = V _drill • t _solid , m
where V _drill - drilling speed, m / shift;
t _solid - bookmark curing time, change
The use of the invention provides a highly efficient in-line ore mining technology with a high coefficient of ore extraction from the deposit.

The method is illustrated in the drawing, where in Fig.1 shows a vertical longitudinal section, and in Fig.2 is a vertical transverse section. In the presented figures:
1 - bookmark;
2 - ventilation and filling drift;
3 - ore;
4 - recoil drift;
5 - vehicle;
6 - cutting drum unit vertical action;
7 - unit vertical action;
8 - loading hatches.

I - the camera is filled with a bookmark;
II - the camera is in the process of filling the bookmark;
III - the chamber in the stage of the cleaning recess.

In the proposed method, ore is excavated within the floor without leaving inter-chamber and inter-storey pillars with narrow chambers of a width equal to the width of the cutting drum (1 m) and a length equal to the length of the cutting drum (8 m) of the working crown of the AED drilling unit of the design of the VNIIG and Giprouglegormash institutes (and (p. 61422 dated 03/14/78), allowing narrow narrow slots to pass at an angle of 75-90 ^o . Before the start of mining operations, a haul-off drift 4 is used to locate the drilling unit 7 and vehicles 5 - trolleys or conveyor. Directly from the haulage drift along the vein by the cutting drum 6 of the drilling unit 7, a narrow long slot is created in which the outlet hatches are installed 8. Then the process of cleaning excavation by the cutting drum 6 begins. The destroyed ore under the influence of gravity in the free space of the chamber falls down and is loaded through the outlet hatches to vehicles 5 installed in the haulage drift. The extraction of ore is carried out continuously regardless of the operation of the haulage vessels. When ore is transported by a conveyor belt, ore is continuously discharged from the chamber through the outlet hatches from the block, and when ore is transported by trolleys, ore is temporarily stored in the chamber until the trolleys arrive. The ore is mined in the chamber continuously up to the filling horizon without leaving a ceiling, i.e. no loss of minerals. After mining all the ore in the chamber, the discharge hatches are dismantled, the cutting drum is lowered down, and the drilling rig moves along the haulage drift to a new drilling site. The roof of the haulage drift is closed and a hardening tab 1 is fed into the chamber from the ventilation-filling drift 2. The filing of the bookmark into the spent chamber is carried out in parallel (simultaneously) with mining operations in the adjacent chamber ahead of the latter for gaining the minimum required strength.

 In the proposed development method, treatment works within the floor are carried out in a retreating order, ensuring the safety of workers, since they are always in a fixed recoil drift on a clean ventilation stream.

 The use of a self-propelled drilling rig, in-line technology, the absence of people in the treatment space, the absence of blasting provide high labor productivity for workers in the development of vein deposits.

Claims (1)

The method of underground development of steeply falling vein deposits, including sinking of the haulage and ventilation drifts, upward excavation of ore in the chambers and its delivery to the haulage horizon under the action of gravity, characterized in that they conduct continuous continuous excavation of ore by the drilling unit through the ore body with parallel filling of the adjacent spent chamber monolithic hardening tab, while the lag of the working face L from the level of the tab in the adjacent chamber is determined by the formula
L = V _drill • t _hard , m,
where V _drill - drilling speed, m / shift;
t _solid - bookmark curing time, change.

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