RU2327037C1 - Excavation method of thick flat-lying coal seam with fast roof - Google Patents

Excavation method of thick flat-lying coal seam with fast roof Download PDF

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RU2327037C1
RU2327037C1 RU2006137615/03A RU2006137615A RU2327037C1 RU 2327037 C1 RU2327037 C1 RU 2327037C1 RU 2006137615/03 A RU2006137615/03 A RU 2006137615/03A RU 2006137615 A RU2006137615 A RU 2006137615A RU 2327037 C1 RU2327037 C1 RU 2327037C1
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Russia
Prior art keywords
chamber
layer
excavation
combine
roof
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RU2006137615/03A
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Russian (ru)
Inventor
Степан Илларионович Калинин (RU)
Степан Илларионович Калинин
Валерий Александрович Федорин (RU)
Валерий Александрович Федорин
В чеслав Яковлевич Шахматов (RU)
Вячеслав Яковлевич Шахматов
Борис Алексеевич Анферов (RU)
Борис Алексеевич Анферов
Валерий Иванович Пензин (RU)
Валерий Иванович Пензин
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Институт угля и углехимии Сибирского отделения Российской Академии Наук (ИУУ СО РАН)
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Abstract

FIELD: coal mining.
SUBSTANCE: method is based on debugging room-and-pillar system and includes mine section treatment in layer near roof of the seam with transport 1 and ventilation 2 workings with sequential installation of extraction chambers from transportation 1 till ventilation 2 working in descending order. At that roof and rim of excavating chambers 5.20 are fixed with anchoring steel polymer shoring. Coal excavation is carried out with frontal function combine 4 in interchamber pillars 21 by diagonal entry way 8,10,22,23, directed at the angle 120...135 degrees to axle of excavating chamber from the both sides. Entry way roof is fixed with anchor shoring. Broken-down coal transportation to transport working 1 is carried out by self-propelling car 6. Between entry ways 8,10,13 one leaves under breaking pillars 8,15. After the excavation of several entry ways in layer at the roof of the seam by the same combine 4 one deepens excavating chamber 20 till seam ground and take out end entry way 12 under corresponding entry way 8 in layer at roof of the seam, i.e. under anchoring shoring. After entry way excavation in layer at seam ground combine is returned to chamber ground in layer at roof of the seam and excavation of several entry ways in that layer is carried out. Then the chamber is deepened till layer ground and several entry ways are excavated in the layer at seam ground and so on. Axis slope angle of excavating chamber, entry ways, transportation and ventilation workings and ramps to the horizon are taken no more admissible for applied mechanised systems for scouring works, and entry way length is no more than combine length. Entry ways, worked from the next chamber side in one interchamber pillar, are located in checkerboard order as to entry ways, worked from the side of previous chamber.
EFFECT: improvement of working effectiveness and changing of transport means of continuous action on means of cycling action.
2 cl, 3 dwg

Description

The present invention relates to mining, in particular, to methods for developing powerful shallow coal seams and can be used in the development of other reservoir minerals.
A known layered method of excavating powerful flat coal seams with flexible overlapping, including the preparation of excavation fields in each layer by conducting ventilation and transport workings and connecting them with ventilation and conveyor furnaces. The upper mounting layer is removed with the flooring on the soil layer of a flexible separating overlap. The bottom layer is removed under the protection of flexible overlapping by the face with a time lag of at least 3 months from the top layer so that before the start of work in the bottom of the bottom layer, the main roof is planted. The development of each layer is carried out according to the development system “Long posts along strike” with the use of treatment mechanized complexes [1].
The disadvantage of this method is that when developing disturbed formations with intolerable geological disturbances, the length of the prepared excavation column is significantly reduced, due to which the cost of installation and dismantling work is significantly increased, and the development of such a formation becomes ineffective.
The closest analogue adopted as a prototype is a method of mining a shallow coal seam by mechanization using a chamber-pillar development system, including preparing a excavation field in the layer near the formation roof by conducting ventilation and transport drifts, sequentially conducting excavation chambers with anchor fastening of the sides and the roof, their deepening and the extinction of interchamber pillars with diagonal approaches in two layers - at the roof and layer soil [2].
The disadvantages of the prototype are:
- the use of a scraper conveyor for transporting coal in a mining chamber; because of this, on the one hand, as cleaning work progresses, it becomes necessary to carry out installation and dismantling work, on the other hand, the organization of work on expanding and securing the chamber becomes more complicated;
- the entry of the excavation is carried out only on one side of the extraction chamber, and this increases their required number, i.e. volume of preparatory workings, in particular - chambers.
These shortcomings reduce the efficiency of developing a powerful flat coal seam in two layers according to the chamber-pillar system.
The aim of the invention is to increase the efficiency of developing a powerful flat coal seam in a chamber-pillar system by repaying inter-chamber pillars with bilateral diagonal entries and replacing continuous vehicles with cyclic means.
This goal is achieved by the fact that in the method of developing a powerful flat coal seam, including the preparation of a mining field in the layer at the roof of the formation by conducting ventilation and transport workings, the successive holding of excavation chambers from the transport to the ventilation workings with anchor fastening of the sides and the roof, their depth to the soil of the formation , repayment of inter-chamber pillars with diagonal approaches in two layers with the leaving of the rear pillars and transport of chipped coal within the extraction chamber, the first extraction chamber the ru is carried out along the upper boundary of the excavation field with a front-end combine harvester over the entire width with transport of beaten coal up to the transport production by a self-propelled wagon; during the reverse course of the combine, coal is mined in runs below the formation dip, alternately in the layer at the top of the layer, then in the layer near it soil with a recess of the extraction chamber by inclined ramps, the second and subsequent chambers are carried out in a similar manner below the first one according to the dip of the formation, and during the reverse course of the combine, coal is mined in the inter-chamber pillar in the the uprising of the formation and in the array along its fall, and the angle of inclination of the axis of the extraction chamber, approach and transport output to the horizon take no more than acceptable for the used means of mechanization, the approach in the interchamber is placed in a checkerboard pattern - the approach taken out of the camera located lower in the fall formation, located in the alignment with the entire substitute, left when conducting work in the chamber above the line of the rising of the formation, and the length of the entry take no more than the length of the combine.
The essence of the technical solution is illustrated by diagrams. Figure 1 shows the technological scheme of preparation and development of the excavation field; figure 2 is a sequence of notches of the entries and the depths of the camera; figure 3 - the procedure for practicing calls in the inter-chamber pillar.
The method can be implemented as follows. The excavation field of a powerful shallow coal seam is prepared by carrying out transport 1 and ventilation 2 workings in the layer at the roof of the seam, and these can be drifts, slopes, furnaces, etc. In the transport excavation 1, a conveyor 3 is mounted (belt or scraper). At the upper boundary of the excavation field, with a front-end combine 4 from the transport 1 to the ventilation 2 excavations, a camera 5 is taken out, the axis of which is inclined to the horizon line at an angle no more than acceptable for the used mechanization means. In this case, the angle of inclination of the axis of the chamber 5 ensures that mine water is diverted to the mine 1, and the transport of broken coal in the chamber to the transport mine 1 is carried out by a self-propelled wagon 6. The roof and sides of the chamber are supported by steel-polymer anchor support 7. When holding the chamber 5, the ventilation is carried out by a local ventilation fan , and after the failure of chamber 5 with ventilation output 2 - due to the mine depression.
After the combine 4 goes into the ventilation outlet 2, it is driven back a certain distance back into the chamber and coal is taken out from the falling side of the formation in diagonal entry 8. In this case, the insert axis is directed at an angle of 120 ... 135 degrees to the axis of the extraction chamber, and to the line horizon inclination slope not more than acceptable for the combine. After excavation of the insert 8 to the length of the combine 4, the latter is driven back along the chamber and, leaving the entire rear gate 9, they begin to take out the coal in the sunset 10.
After the extraction of coal in openings 8 and 10, the combine is again driven off a certain distance along the chamber towards the transport excavation and work begins on the chamber 5 in-depth to the formation soil. For this, the combine 4 is cut into the soil of the chamber, forming an inclined exit 11. At the same time, the angle of inclination of the exit 11 to the horizon is taken no more than acceptable for the combine and a self-propelled car.
Having deepened part of the chamber 5 to the soil of the formation, the same combine 4 proceeds to the extraction of coal in sunset 12, placing it under sunset 8.
After the entry 12 is taken out from the formation soil, the combine 4 is distilled onto the layer soil near the formation roof and the coal is taken out in the insertions 13 and 14 in the same order, leaving the rear pillars 15 and 16. Then the next inclined exit 17 is made, deepening the next part of the chamber 5 to the soil formation, and take out the coal in the openings 18 and 19. And so on until a part of the extraction field between the transport 1 and ventilation 2 workings is developed, adjacent to the chamber 5 from the side of the falling formation.
After the extraction of reserves adjacent to the chamber 5, the combine 4 for production 1 is distilled lower in the formation and cut into the coal mass, than the next excavation chamber 20 is started, in the same way as it was with the chamber 5, and an interchamber pillar 21 is left, the width of which taken equal to 2l to · sin (180-α), where l to - the length of the combine, m; α = 120 ... 135 - the angle between the axes of the camera and the sunset in the plan, degrees. After the combine 4 goes into the ventilation outlet 2 and the chamber 20 is ventilated due to the mine depression, they start digging coal in the inter-chamber pillar 21 in the inlets 22, 23 and 24, leaving the sub-gate pillars 25 and 26, and then in the array lower in the formation in the inlets 27 and 28, leaving the entire rear of the substation 29. In this case, the penetrations 22, 23 and 24 are positioned so that the bottom of the insert after it has been cut to the length of the combine is in the entire secondary intersection formed by the insertions worked from the side of the extraction chamber 5, i.e. in a checkerboard pattern. Then, an inclined ramp 30 is constructed, thereby deepening the part of the extraction chamber 20 to the formation soil, and the coal is taken out under setting 22. Next, as described above.
Thus, replacing the conveyor in the extraction chamber with a self-propelled car allows minimizing installation and dismantling costs associated with coal transport within the extraction chamber, and the organization of coal extraction in diagonal feedthroughs arranged in a checkerboard pattern reduces the volume excavation chambers, as more labor-intensive and material-intensive. This indicates an increase in the efficiency of developing powerful flat coal seams, i.e. achieving the objective of the invention
Information sources
1. A.S. USSR No. 1697479 (analogue).
2. The technology of mining flat and inclined coal seams according to the chamber-pillar system in difficult mining and geological conditions: a training manual / A.V. Remezov, P.V. Egorov, S.I. Kalinin et al. - Kemerovo: Kuzbassvuzizdat, 2005 , p.96-101, Fig. 33, 34, 35 (prototype).

Claims (2)

1. A method of developing a powerful shallow coal seam, including preparing a excavation field in the layer at the top of the seam by conducting ventilation and transport workings, alternately conducting excavation chambers from the transport to the ventilation workings with anchor fastening of the sides and the roof, their indentation to the bed of the formation, paying off diagonal inter-chamber pillars in two-layer approaches with leaving the rear gate and transport of chipped coal within the extraction chamber, characterized in that the first extraction chamber is carried out vertically along the boundary of the excavation field with a front-end combine harvester along the entire width with the transport of beaten coal before transporting a self-propelled wagon, during the reverse course of the combine, coal is mined in the openings lower in the formation dip, alternating either in the layer near the roof of the formation or in the layer near its soil with a deep excavation chambers by inclined exits, the second and subsequent chambers are carried out in a similar way below the first one according to the formation fall, during the reverse course of the combine, coal is mined in the inter-chamber pillar in the approaches to the formation uprising and the array by its fall, and the angle of inclination of the axis of the extraction chamber, the approach of the transport excavation and the inclined ramp to the horizon are taken no more than permissible for the used mechanization means, the approaches in the interchamber are placed in a checkerboard pattern - the entry taken out of the chamber located below the formation dip, they are located in the alignment with the entire sub-gate left during operations in the chamber higher along the line of the formation uprising, and the length of the lead-in is taken no more than the length of the combine.
2. The method according to claim 1, characterized in that the width of the interchamber pillar is taken equal
H = 2l k · sin (180-α),
where H is the width of the interchamber pillar, m;
l k is the length of the combine, m;
α = 120-135 - the angle between the axes of the camera and the sunset in the plan, degrees.
RU2006137615/03A 2006-10-24 2006-10-24 Excavation method of thick flat-lying coal seam with fast roof RU2327037C1 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA014034B1 (en) * 2008-07-29 2010-08-30 Открытое Акционерное Общество "Белгорхимпром" (Оао "Белгорхимпром") Excavation method of minerals seam
RU2442895C1 (en) * 2010-05-31 2012-02-20 Учреждение Российской академии наук Институт угля и углехимии Сибирского отделения РАН (ИУУ СО РАН) Method for development of thick flat coal seam with stable top
RU2471990C1 (en) * 2011-07-26 2013-01-10 Учреждение Российской академии наук Институт горного дела Сибирского отделения РАН Method to mine sloping and inclined coal beds of average capacity
RU2487240C1 (en) * 2011-12-26 2013-07-10 Учреждение Российской академии наук Институт угля Сибирского отделения РАН (ИУ СО РАН) Method for open-underground mining of heavy slope coal bed
RU2490457C1 (en) * 2011-12-07 2013-08-20 Учреждение Российской академии наук Институт угля Сибирского отделения РАН (ИУ СО РАН) Method of open-underground mining of flat coal bed of medium thickness
RU2490454C1 (en) * 2012-03-11 2013-08-20 Федеральное государственное бюджетное учреждение науки Институт угля Сибирского отделения Российской академии наук (ИУ СО РАН) Method for open-underground mining of thick steep coal bed
RU2555997C1 (en) * 2014-06-24 2015-07-10 Федеральное государственное бюджетное учреждение науки Институт угля Сибирского отделения Российской академии наук (ИУ СО РАН) Method of open-underground development of thick single steeply inclined coal seam
RU2651833C1 (en) * 2017-03-29 2018-04-24 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук (ФИЦ УУХ СО РАН) Method of open-underground development of coal bed, lying in the form of brachysyncline
CN109252860A (en) * 2018-08-01 2019-01-22 中国煤炭科工集团太原研究院有限公司 A kind of girdle continuous milling machine high mechanization recovery method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
РЕМЕЗОВ А.В. и др. Технология отработки пологих и наклонных угольных пластов по камерно-столбовой системе в сложных горно-геологических условиях. Учебное пособие. - Кемерово: Кузбассвузиздат, 2005, с.96-101, рис.33-35. *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA014034B1 (en) * 2008-07-29 2010-08-30 Открытое Акционерное Общество "Белгорхимпром" (Оао "Белгорхимпром") Excavation method of minerals seam
RU2442895C1 (en) * 2010-05-31 2012-02-20 Учреждение Российской академии наук Институт угля и углехимии Сибирского отделения РАН (ИУУ СО РАН) Method for development of thick flat coal seam with stable top
RU2471990C1 (en) * 2011-07-26 2013-01-10 Учреждение Российской академии наук Институт горного дела Сибирского отделения РАН Method to mine sloping and inclined coal beds of average capacity
RU2490457C1 (en) * 2011-12-07 2013-08-20 Учреждение Российской академии наук Институт угля Сибирского отделения РАН (ИУ СО РАН) Method of open-underground mining of flat coal bed of medium thickness
RU2487240C1 (en) * 2011-12-26 2013-07-10 Учреждение Российской академии наук Институт угля Сибирского отделения РАН (ИУ СО РАН) Method for open-underground mining of heavy slope coal bed
RU2490454C1 (en) * 2012-03-11 2013-08-20 Федеральное государственное бюджетное учреждение науки Институт угля Сибирского отделения Российской академии наук (ИУ СО РАН) Method for open-underground mining of thick steep coal bed
RU2555997C1 (en) * 2014-06-24 2015-07-10 Федеральное государственное бюджетное учреждение науки Институт угля Сибирского отделения Российской академии наук (ИУ СО РАН) Method of open-underground development of thick single steeply inclined coal seam
RU2651833C1 (en) * 2017-03-29 2018-04-24 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук (ФИЦ УУХ СО РАН) Method of open-underground development of coal bed, lying in the form of brachysyncline
CN109252860A (en) * 2018-08-01 2019-01-22 中国煤炭科工集团太原研究院有限公司 A kind of girdle continuous milling machine high mechanization recovery method
CN109252860B (en) * 2018-08-01 2020-04-07 中国煤炭科工集团太原研究院有限公司 High-degree mechanical mining method for thin coal seam continuous mining machine

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