RU2612178C2 - Method of open mining of steep dipping field having round form using temporary nonworking sidewalls - Google Patents

Method of open mining of steep dipping field having round form using temporary nonworking sidewalls Download PDF

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RU2612178C2
RU2612178C2 RU2015131262A RU2015131262A RU2612178C2 RU 2612178 C2 RU2612178 C2 RU 2612178C2 RU 2015131262 A RU2015131262 A RU 2015131262A RU 2015131262 A RU2015131262 A RU 2015131262A RU 2612178 C2 RU2612178 C2 RU 2612178C2
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Russia
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nonworking
sidewall
mining
temporary
during
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RU2015131262A
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Russian (ru)
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RU2015131262A (en
Inventor
Георгий Георгиевич Саканцев
Алексей Викторович Яковлев
Татьяна Максимовна Переход
Леонид Сергеевич Морозов
Фарида Илгизова Морозова
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Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН)
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/26Methods of surface mining; Layouts therefor

Abstract

FIELD: mining.
SUBSTANCE: invention relates to mine industry and can be used during opening and open mining of deep laying steep dipping fields having round form and using temporary nonworking sidewalls. For this the method and open mining of steep dipping fields comprising forming of the work zone, a process of mining of open-pit benches, and ensuring load transportation link of work horizons with surface, a pit space through depth is divided to two zones, in top zone at side of laying sidewall a first queue of mining is allocated adjacent to the end sidewall of the borrow-pit, and opening are formed, at side of hanging sidewall the first queue is limited by the temporary nonworking sidewall with inclination angle close to the limit angle, and opening drifts are located on it. Base of the temporary nonworking sidewall has horizontal sites protecting against rockfall, their width is accepted considering location of the slope out of falling rocks, embankment protecting against stones with installed hydraulic excavators of backhoe type and motor roads. After first queue development the second queue of borrow pit formations is started, i.e depreservation of temporary nonworking sidewall and development of the adjacent volumes with simultaneous decreasing of mine works in central part of the borrow pit. Wherein development of volumes during depreservation of the temporary nonworking sidewalls performed during longitudinal movement of radially oriented front of mine works. Mined rock falling during depreservation of the temporary nonworking sidewall downward on the stone protecting site is loaded to vehicles by a hydraulic excavator installed on the stone protecting embankment, and removed to surface. On the formed end sidewall the opening mine workings are arranged instead of lost due to depreservation of the temporary nonworking sidewalls. During further decreasing of the mine works at side of the hanging sidewall one additional nonworking sidewall is formed, also with stone protecting site in its base, wherein the additional nonworking sidewall is depreserved by a method used during depreservation of the temporary nonworking sidewall of the second queue.
EFFECT: invention reduces current overburden ratio during the initial period of field development.
3 dwg

Description

The invention relates to the open development of steeply dipping mineral deposits of a rounded shape and can be used to optimize career space parameters.
There is a method of increasing the slope angles of the working boards, based on the phased development of deposits [1]. The essence of the method is the temporary preservation of individual ledges, in which the board is temporarily inoperative. Preservation is carried out at an angle close to the angle of repayment of the marginal side of the quarry. When the temporarily non-working side reaches the calculated height, the separation of its upper horizons begins, but at the same time, the height of the temporarily non-working side from the bottom continues to grow due to the ongoing deepening of the quarry. Thus, the temporarily idle side section “slides” along the contour of the stage. Similarly, areas of temporarily idle side formed on the contour of the subsequent stages of development are worked out. The economic efficiency of the method is achieved by reducing the current stripping ratio by increasing the resulting slope angle of the working side. At the same time, efficiency increases with an increase in the angle of inclination of temporarily idle sides. In large quarries, the volume of canned overburden can reach several tens of millions of cubic meters with a conservation period of 10 years or more.
However, this method of increasing the slope angles of the working sides has a significant drawback, namely, that the spacing of the upper horizons of the temporarily idle side is accompanied by the ejection of rock mass during blasting. As a result, with a sufficiently steep angle of slope of the temporarily idle side, all of it can be completely covered with blasted rock mass. This excludes the possibility of placing cutting openings on sections of the temporarily idle side and does not provide the conditions for safe mining operations when lowering the working horizons to the temporarily inoperative position. Such negative phenomena are avoided by the fact that a temporarily idle side is formed with sufficiently wide berms, which make it possible to place an ejection of blasted rock mass at one or two horizons. But this leads to a flattening of the resulting slope angle of the working side of the quarry and to an increase in the current stripping ratio in the initial period of the quarry.
Of the known methods of open-pit mining of mineral deposits, including the formation in the working zone of a quarry of ledges of a temporarily idle side, spacing of the upper horizons of a temporarily idle side simultaneously with its formation by bringing it into a temporarily idle position below the working horizons, is a method characterized in that at the horizons temporarily idle side barrage shafts are sprinkled to catch rockfall at intervals of height equal to the height of the sections temporarily not working side, and in the permanent or temporarily idle side of the quarry, transport bermas are arranged on the horizons of the barrage shafts, from which there are ramps to the lower working horizons within a depth interval equal to the height of the temporarily idle side section [2], [3].
The disadvantage of this method is the need to flatten out a temporarily idle side for the device of transport berms and platforms, platforms with barrage shafts and interrupt the cargo transportation between sections of the temporarily idle side when it is re-mothballed, and the device of the barrage shafts does not ensure the safety of work when re-conservation of pillars and work on working horizons due to the expansion of stones. Interruption of cargo transportation links between sections in depth during re-conservation of the side leads to the need for the construction of additional exits on the working board and its flattening. At the same time, solving the problem of opening through the removal of opening workings to the neighboring part of the working area with normal working sites and the construction of connecting transport sites leads to an increase in current overburden ratios and additional costs for developing the field.
The aim of the present invention is to reduce the current stripping ratio in the initial period of development of deep-lying steeply dipping deposits of round shape due to the temporary preservation of the sides and the technologically determined sequence of mining the quarry.
This goal is achieved by the fact that the quarry space is divided in depth into two zones, within the upper zone from the lying side, the first development stage is allocated that is directly adjacent to the final side of the quarry, and from the hanging side, they are primarily limited to a temporarily idle side with an inclination angle, close to the limit. Opening openings are formed on the final and temporarily non-working sides to ensure cargo-transport communication of the working horizons with the surface, and stone-protected areas with a stone-protective embankment are arranged at the base of the temporarily non-working side. After mining the reserves of the first stage of the quarry, they begin to re-preserve the side set in the temporarily inoperative state from the side of the hanging side and develop the volumes located behind it. The development of these volumes is carried out with the longitudinal movement of the radially oriented front of mining. The blown up rock mass, falling during re-preservation to a stone-protected platform, is loaded with a backhoe backhoe into vehicles and transported to the surface. In the process of further lowering of mining from the side of the hanging side, another temporarily non-working side is also formed with a stone protection platform at its base, which is then re-opened using the method used to re-preserve the temporarily non-working side of the second stage.
The method is illustrated by drawings, where:
Figure 1 shows the division of the quarry on the development line with an indication of the sequence of work in Roman numerals (I, II, III, IV, V).
Figure 2 shows the design of a stone-protective platform that provides protection against blasted rock falling from the upper ledges during mining of edge ribbons.
Figure 3 presents a schematic plan for the development of steeply dipping deposits of round shape using the queues at the time the start of development of the second stage (II).
The method is as follows.
The career field is divided in depth into two zones - the upper (1) and lower (2) (figure 1). The lower boundary of the first zone is line (5). Within the upper zone, from the side of the lying side, the first (I) development stage is identified that is directly adjacent to the final side of the quarry (3), and opening workings are formed on it, and from the side of the hanging side, they are primarily limited to a temporarily idle side (4) with an inclination angle , close to the limit, and also open opening workings on it. At the base of the temporarily idle side, horizontal platforms (6) are arranged to protect against rockfall. A stone-protective platform is taken with a width that ensures placement on it (Fig. 2) of a rock mass (7) falling from the upper horizons, a stone-protective embankment (8) and a transport lane (9). A hydraulic shovel type excavator is installed on the stone-protective embankment (10), which is intended for loading the rock falling from the upper ledges into vehicles (11) located on the transport lane for transportation to the surface.
Cargo transportation communication of the working horizons of the first stage with the surface (figure 3) is carried out using a system of opening workings (12), placed on the final side from the lying side (3).
The second stage of field development (II) includes the re-conservation of a temporarily idle side and development of overburden volumes between this side and the open pit limit side (13). The mining of volumes of the second stage is carried out with the longitudinal movement of a radially oriented front of mining (14) (Fig. 3), while lowering mining in the central part of the quarry, which ensures ore mining. In the process of mining the volumes of the second stage, part of the blasted rock mass from the edge band of the temporarily idle side (4), falling onto the stone protection platform (6), is loaded with a hydraulic backhoe “10 shovel” into vehicles (11) and transported to the surface. As mining operations decrease, the open pits are formed on the terminal side of the quarry (13). With further development of the quarry space, another temporarily idle side is formed from the side of the hanging side (15), with an inclination angle close to the limiting one, and with a stone-protected platform at its base, which will then be re-opened using the method used to re-preserve the temporarily idle side (4) (Ii) the lineup.
The specified set of essential features of the proposed method provides a significant reduction in the current stripping ratios in the initial period of mining deep-seated steeply dipping deposits of round shape, increasing the safety of mining operations under rockfall conditions and replacing a large number of temporary openings of the working area with semi-stationary ones.
Information sources
1. Khokhryakov B.C. Open pit mining in stages. Izv. universities. Mountain Journal, No. 10, 1965.
2. Patent RU 2064582 C1, IPC E21C 41/26.
3. Linev V.P., Rubinstein S.B. Ensuring the safety of mining when using temporarily idle sides. Mountain Journal, 2001, No. 5, p. 20-23.

Claims (1)

  1. A method of open development of steeply dipping round-shaped deposits, including the formation of a working zone, overburden mining technology and the provision of cargo transportation of working horizons with the surface, characterized in that the quarry space is divided into two zones in depth, the first priority is allocated from the lying side development, directly adjacent to the final side of the quarry, and form opening workings on it, and from the side of the hanging side, first of all, limit the time but an idle side with an inclination angle close to the limit, and opening workings are also located on it, at the base of the temporarily idle side they arrange horizontal platforms for protection against rockfall, the width of which is taken into account for the location of a slope from falling stones, a stone-protective embankment with hydraulic excavators such as "backhoe" and highways, after working out the first stage, they move to the second stage of the formation of a career space - re-conservation of temporarily idle boron and mining the volumes adjacent to it while reducing mining in the central part of the quarry, while mining the volumes during the re-conservation of the temporarily idle side is carried out by longitudinally moving the radially oriented front of the mining operations, the rock mass falling during the re-preservation of the temporarily idle side down on a stone-protected area, a hydraulic excavator mounted on a stone-protective embankment is loaded into vehicles and transported to the surface; openings are placed on the final board formed Suitable developing instead disposed at depreservation temporarily inoperative bead during further lowering by the mining hanging wall forming another temporary nonworking board also stone shielding retention area at its base, which is then raskonserviruyut procedure used for reactivation temporarily inoperative side of the second stage.
RU2015131262A 2015-07-27 2015-07-27 Method of open mining of steep dipping field having round form using temporary nonworking sidewalls RU2612178C2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2652234C1 (en) * 2017-04-17 2018-04-25 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method of open development of inclined deposits with the use of spoil banks
RU2685583C1 (en) * 2018-07-13 2019-04-22 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of steep deposits with application of multistage temporarily non-working sides
RU2685594C1 (en) * 2018-09-04 2019-04-22 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of steeply dipping deposits of round shape with application of single-stage steeply inclined temporarily non-working sides
RU2685587C1 (en) * 2018-10-03 2019-04-22 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of steeply-dipping deposits with application of combined temporary non-working sides
RU2738148C1 (en) * 2019-07-19 2020-12-08 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of deep-lying rounded deposits

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692364A (en) * 1969-10-31 1972-09-19 Sune Torsten Henriksson Method of open-pit mining
SU1053557A1 (en) * 1980-07-11 1996-01-27 Государственный союзный институт по проектированию предприятий горнорудной промышленности Method of opencast mining of mineral deposits
RU2064582C1 (en) * 1992-02-21 1996-07-27 Акционерное общество "Институт по проектированию горнорудных предприятий "Гипроруда" Method for openpit mining of minerals
RU2528704C1 (en) * 2013-05-06 2014-09-20 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method of open working out of steep deposits of platform shape
RU2533996C1 (en) * 2013-06-26 2014-11-27 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method of open development of steep deposits of area form

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692364A (en) * 1969-10-31 1972-09-19 Sune Torsten Henriksson Method of open-pit mining
SU1053557A1 (en) * 1980-07-11 1996-01-27 Государственный союзный институт по проектированию предприятий горнорудной промышленности Method of opencast mining of mineral deposits
RU2064582C1 (en) * 1992-02-21 1996-07-27 Акционерное общество "Институт по проектированию горнорудных предприятий "Гипроруда" Method for openpit mining of minerals
RU2528704C1 (en) * 2013-05-06 2014-09-20 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method of open working out of steep deposits of platform shape
RU2533996C1 (en) * 2013-06-26 2014-11-27 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method of open development of steep deposits of area form

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2652234C1 (en) * 2017-04-17 2018-04-25 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method of open development of inclined deposits with the use of spoil banks
RU2685583C1 (en) * 2018-07-13 2019-04-22 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of steep deposits with application of multistage temporarily non-working sides
RU2685594C1 (en) * 2018-09-04 2019-04-22 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of steeply dipping deposits of round shape with application of single-stage steeply inclined temporarily non-working sides
RU2685587C1 (en) * 2018-10-03 2019-04-22 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of steeply-dipping deposits with application of combined temporary non-working sides
RU2738148C1 (en) * 2019-07-19 2020-12-08 Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) Method for open development of deep-lying rounded deposits

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Effective date: 20180728