RU2325528C1 - Method to control hard-caving roof - Google Patents

Method to control hard-caving roof Download PDF

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Publication number
RU2325528C1
RU2325528C1 RU2007101781/03A RU2007101781A RU2325528C1 RU 2325528 C1 RU2325528 C1 RU 2325528C1 RU 2007101781/03 A RU2007101781/03 A RU 2007101781/03A RU 2007101781 A RU2007101781 A RU 2007101781A RU 2325528 C1 RU2325528 C1 RU 2325528C1
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RU
Russia
Prior art keywords
roof
caving
mining
mineral
lava
Prior art date
Application number
RU2007101781/03A
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Russian (ru)
Inventor
Юрий Георгиевич Сиренко (RU)
Юрий Георгиевич Сиренко
Евгений Ростиславович Ковальский (RU)
Евгений Ростиславович Ковальский
Леонид Сергеевич Синьков (RU)
Леонид Сергеевич Синьков
Михаил Юрьевич Брычков (RU)
Михаил Юрьевич Брычков
Иван Иванович Головатый (BY)
Иван Иванович Головатый
Егор Николаевич Кулешов (BY)
Егор Николаевич Кулешов
Original Assignee
Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)"
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Priority to RU2007101781/03A priority Critical patent/RU2325528C1/en
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Publication of RU2325528C1 publication Critical patent/RU2325528C1/en

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Abstract

FIELD: mining industry.
SUBSTANCE: invention relates to mining industry and may be used when mining potassium and coal beds with hard-caving roof, in particular, during mineral selective mining with partial stowing of worked-out area. The method to control hard-caving roof implies leaving of pillars, partial stowing of worked-out area with side and central packs from boundary and stowing (airway) entries of the face. Additionally, mineral is recovered from pillars and resulting space is gobbed, width h of additional mining being determined according to formula
Figure 00000003
m, where L - length of place, m. The invention provides for increase in mineral recovery ratio by 15-30%, less amount of drivage, and roof caving control during working face travel, i.e. roof-caving increment being constant, with no adverse effect on the face operation.
EFFECT: increased mineral recovery ratio, less amount of drivage, roof caving control during working face travel.
1 dwg

Description

The invention relates to the mining industry and can be used in the development of potash and coal seams with hard-to-collapse roofs, in particular for the selective extraction of minerals with a partial laying of the worked-out space with rubble strips.
There is a method of controlling a hard-to-collapse roof, which consists in partial laying of the worked-out space with two side and central rubble strips, with the central rubble laid in separate sections parallel to the face line as the lava moves [RF Patent No. 2177546 Yu.G. Sirenko, O.V. Kovalev et al. “A way to control a hard-to-collapse roof”. M. 7 E21C 41/18, BI No. 36, 2001]. However, this method is not effective enough and does not provide sufficient security, since 95% of cases of dynamic collapse of the main roof occur in the semi-clav from the side of the array, in which the next excavation column will be cut.
Closest to the proposed one is a method of managing a hard-to-collapse roof with a partial laying of the worked-out space, which consists in the construction of pedigree rubble strips perpendicular to the face [Normative and methodological documents for mining at the Starobinsky potassium salt deposit. - Salihorsk-Minsk, 1995, pp. 122-124]. Partial laying in this case is made by the central and lateral stripes, the amount of which is determined by the length of the lava and the volume of gangue that needs to be stored. Warehousing, with this method, is carried out by unilaterally erecting rubble strips from the side lava drifts and erecting rubble strips on both sides of the filling drifts, which were additionally passed in the lava field. At the same time, in order to protect the preparatory workings and safe work between the worked and prepared posts, a pillar of up to 70 m wide is left, depending on the depth of development, due to which the extraction of mineral from the bowels is reduced by 15-30%. When implementing this method, due to the need for additional drilling drifts, the volume of mining and preparatory work increases and the time required to prepare the panel increases.
The technical result of the invention is to eliminate these drawbacks, namely increasing the coefficient of extraction of ore from the bowels and reducing the volume of mining and preparatory work, while improving the safety of mining.
The technical result is achieved by the fact that in the method of controlling a hard-to-collapse roof, including the abandonment of pillar pillars, partial laying of the worked-out space with side and central rubble strips from the side and backfill (ventilation) lava drifts, according to the invention, additional extraction of mineral from the pillar pillars and laying formed the space is waste rock, while the width h of the additional recess is determined from the expression
Figure 00000004
, m
where L is the length of the lava, m
The control method of a hard-to-collapse roof is illustrated by a drawing, which shows a plan view of a dredging column.
The drawing shows:
1 - conveyor drift of lava; 2 - central ventilation drift (aka lava stowage drift); 3 - transport drift of lava; 4 - downhole conveyor; 5 - scraper loader; 6 - thrower; 7 - rubble strips; 8 - an unworked section of a mine field in which a new excavation column is prepared; 9 - transport drift of a new (prepared) lava; 10 - rubble strip previously worked column; b is the width of the preparatory workings; h is the width over which additional extraction of the mineral from the pillar of the pillar is made; L is the length of the lava (without additional extraction of inter-danny pillars); and - the width of the rubble strip.
The method is as follows:
To prepare the excavation column, the conveyor drift of the lava 1, the central ventilation drift 2, the transport drift of the lava 3 are passed. The reloader 5 and the thrower 6 are installed under the interface support on the conveyor, ventilation and transport drifts of the lava.
In the process of treatment dredging waste rock enters from the face conveyor 4 to the loader and then to the thrower, with the help of which it is thrown into the worked out space. In this case, the extraction of minerals is carried out not only within the contour of the preparatory workings of the treatment column (L), but also in the pillar pillars from the spent and prepared column at a distance h, which is determined by the formula:
Figure 00000005
, m
where h is the width of the additional excavation of the mineral from the pillar pillar (from the side of the spent and prepared column), m; L is the length of the lava, m
The width of the rubble strip in this case is:
a = 2h + b,
where a is the width of the rubble strip; h is the width of the additional excavation of the mineral from the pillar pillar, m; b - the width of the preparatory development, m
As a result of the method, the length of the lava increases and the dimensions of the pillar pillars are reduced. The coefficient of mineral extraction is increased by 15-30%. The rubble strips have the same width, the pressure from the side of the massif and the load on the lining are distributed evenly along the entire length of the lava, as a result of which the roof collapses regularly as the working face moves, i.e. with a constant collapse step, without causing any negative consequences for the operation of the lava (dynamic collapse of the roof). The width of rubble strips along the side drifts of lava increases, which allows you to place waste rock in the worked out space without driving additional filling drifts, as a result of which the volume of mining operations is reduced.

Claims (1)

  1. A method of controlling a hard-to-collapse roof, including leaving pillar pillars, partial laying of the mined-out space with side and central rubble strips from the side and backfill (ventilation) lava drifts, characterized in that they make additional excavation of the mineral from the pillar pillars and lay the formed space with empty rock, while the width h of the additional recess is determined from the expression
    Figure 00000006
    where L is the length of the lava, m
RU2007101781/03A 2007-01-17 2007-01-17 Method to control hard-caving roof RU2325528C1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA014130B1 (en) * 2008-11-19 2010-10-29 Открытое Акционерное Общество "Белгорхимпром" (Оао "Белгорхимпром") Method of seam selective mining
CN102966354A (en) * 2012-11-09 2013-03-13 中国矿业大学(北京) Non-pillar mining method for hard roof coal wall of thick coal seam
US8590982B2 (en) 2009-07-10 2013-11-26 Joy Mm Delaware, Inc. Longwall mining roof supports
RU2735173C1 (en) * 2020-04-27 2020-10-28 федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» Method for filling of mined-out space during development of gently sloping beds with long pillars

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Нормативные и методические документы по ведению горных работ на Старобинском месторождении калийных солей Солигорск-Минск, 1995, с.122-124. *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA014130B1 (en) * 2008-11-19 2010-10-29 Открытое Акционерное Общество "Белгорхимпром" (Оао "Белгорхимпром") Method of seam selective mining
US8590982B2 (en) 2009-07-10 2013-11-26 Joy Mm Delaware, Inc. Longwall mining roof supports
US9670777B2 (en) 2009-07-10 2017-06-06 Joy Mm Delaware, Inc. Longwall mining roof supports
CN102966354A (en) * 2012-11-09 2013-03-13 中国矿业大学(北京) Non-pillar mining method for hard roof coal wall of thick coal seam
CN102966354B (en) * 2012-11-09 2014-12-17 中国矿业大学(北京) Non-pillar mining method for hard roof coal wall of thick coal seam
RU2735173C1 (en) * 2020-04-27 2020-10-28 федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» Method for filling of mined-out space during development of gently sloping beds with long pillars

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