CN111119891A - Long wall mining 120 method - Google Patents

Long wall mining 120 method Download PDF

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Publication number
CN111119891A
CN111119891A CN201911307148.9A CN201911307148A CN111119891A CN 111119891 A CN111119891 A CN 111119891A CN 201911307148 A CN201911307148 A CN 201911307148A CN 111119891 A CN111119891 A CN 111119891A
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CN
China
Prior art keywords
working
lane
coal
mining
roadway
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Pending
Application number
CN201911307148.9A
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Chinese (zh)
Inventor
温中义
张洋
孙兴林
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Yongcheng Coal and Electricity Holding Group Co Ltd
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Yongcheng Coal and Electricity Holding Group Co Ltd
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Application filed by Yongcheng Coal and Electricity Holding Group Co Ltd filed Critical Yongcheng Coal and Electricity Holding Group Co Ltd
Priority to CN201911307148.9A priority Critical patent/CN111119891A/en
Publication of CN111119891A publication Critical patent/CN111119891A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/15Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
    • E21D11/152Laggings made of grids or nettings
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/006Ventilation at the working face of galleries or tunnels

Abstract

The invention discloses a long wall mining 120 method, wherein 1 refers to a double-length working face, 2 refers to only one gateway and one middle roadway needing to be tunneled, and 0 refers to no section roadway protection coal pillar. The invention relates to a mining design and arrangement method which only needs to tunnel one gateway and one middle lane through one working face, and the other gateway is born by the retained lane during the stoping of the previous working face without retaining the coal pillars for protecting the lane. When drilling and grouting treatment is carried out on the confined water of the bottom plate of the working face or gas extraction treatment is carried out on the coal seam of the working face under the conditions of complex hydrogeological conditions or high gas and coal and gas outburst mines, the arrangement length of the working face is limited, 50% less roadway retaining can be realized compared with the '110 construction method', the investment of extraction equipment and the installation and dismantling of the working face, the consumption of materials and manpower and the like are greatly reduced compared with the '110 construction method', the labor efficiency and the intensive production level are obviously improved, and good conditions are created for high-yield and high-efficiency mine construction.

Description

Long wall mining 120 method
Technical Field
The invention belongs to the technical field of longwall mining of underground coal mines, and particularly relates to a longwall mining 120 construction method.
Background
The longwall mining method is a longwall mining method which is widely popularized in the miners and coal mines in recent years, one working face is mined back by adopting a constant-resistance anchor cable and a roof-cutting pressure relief technology, only one gateway tunnel is required to be tunneled, the other gateway tunnel is formed by adopting a roof-cutting pressure relief gob-side entry retaining, a section coal pillar lane protecting is cancelled, coal pillar-free mining is realized, and only a near-horizontal coal seam is mined from top to bottom in order to simplify the period (see attached figure 3). By adopting the 110 construction method, the retained roadway can be positioned in the mine pressure relief area by cutting off the stress transmission path between the roof rock beams, and the roadway is automatically formed by the waste rock blocking and protecting wall by utilizing the mine pressure and the surrounding rock movement, compared with the traditional long-wall mining 121 construction method, the method has the advantages of reducing 50% of the tunneling engineering quantity of the roadway along the trench, relieving the shortage of the replacement of the stope working face, reducing the loss of coal pillars, avoiding roof accidents caused by gob-side tunneling and the like. However, when geology and hydrogeology are complex or under the condition of high gas, coal and gas outburst mines, bottom plate water prevention and grouting transformation is required to be carried out by using a working face crossheading or the coal seam gas extraction and treatment is carried out by using the crossheading, the arrangement length of the working face is limited, the length of the working face is generally not more than 180m at most, namely 2 working faces of 110 construction method are required to be arranged when the working face is mined for 360m, namely 2 crossheadings are required to be tunneled, 2 roadways are reserved, and accordingly, the input of mining equipment, the installation and dismantling of the working face, the consumption of materials and manpower and the like are improved, so that the coal output efficiency of the mines is relatively reduced, and the cost and the energy consumption are relatively increased. To this end, a longwall mining 120 method based on the "110 method" is provided.
Disclosure of Invention
The invention provides a longwall mining 120 method, which has the advantages of adopting a 110 method under the conditions of complex hydrogeological conditions or high gas and coal and gas outburst mines. The method can also realize that 50% of the retained roadway is reduced compared with the method adopting the '110 construction method', the investment of the stoping equipment and the installation and the removal of the stoping working face, the material and the labor consumption are greatly reduced compared with the method adopting the '110 construction method', the labor efficiency and the intensive production level are obviously improved, and the technical problems mentioned in the forbidden technology are solved.
The invention provides the following technical scheme: a long wall mining 120 method is provided, only one crossheading and one middle lane are required to be tunneled when a double-length working face is arranged, the other crossheading of the working face is borne by a lane reserved when the previous working face is mined (except for the first mining working face), and no lane-protecting coal pillar is reserved between sections.
Further, under complex hydrogeological conditions or high-gas and coal and gas outburst mine conditions, the working face needs to use the upper and lower gate roads and the middle road roads to carry out drilling and grouting treatment on the pressure-bearing water of the bottom plate of the working face or needs to use the upper and lower gate roads and the middle road roads to carry out gas extraction treatment on the coal seam of the working face.
Further, roof cutting, pressure relief and gob-side entry retaining measures are required to be taken for the newly excavated gate way before stoping of the working face, and during stoping of the working face, entry retaining is carried out while stoping is carried out.
Further, the working face coal outlet belt and auxiliary transportation equipment are arranged on the lower gate way; under the condition of considering utilizing the air inlet of the upper crossheading, the auxiliary transportation equipment can also be arranged on the upper crossheading.
Furthermore, the working face coal seam occurrence condition is suitable for mining the full height at one time.
Furthermore, the middle lane and the newly excavated gate of the working face are actively supported by anchor nets (cables).
Furthermore, the working face middle lane is mainly used for coal seam gas control in the working faces on the two sides of the working face middle lane and drilling and grouting transformation of a coal seam floor confined aquifer.
Further, the working face and the entry retaining are ventilated by full wind pressure. When the nearly horizontal coal seam is mined from top to bottom, air can be supplied to an upper gate, a lower gate and a middle roadway, and flows through the coal face and the retained roadway to enter a return airway and finally enters total return air.
The invention has the following beneficial effects:
(1) the longwall mining 120 method needs to utilize a working face gate way to perform bottom plate water prevention and grouting transformation or utilize a gate way to perform coal seam gas control under the conditions of complex hydrogeological conditions or high gas and coal and gas outburst mines, and when the arrangement length of the working face is limited, the method can not only completely has the advantage of adopting a '110 method', but also can realize 50% less entry retaining than the '110 method', so that entry retaining cost, entry retaining time and entry retaining maintenance cost are reduced by half, and the purposes of saving support, reducing consumption and greatly improving the intrinsic safety degree of the mines are achieved; and the investment of the extraction equipment and the installation and the removal of the working surface, the material consumption and the labor consumption are greatly reduced compared with the method adopting a '110 construction method'. Wherein the installation and removal times of the working surface are reduced by 1 time compared with those of the working surface adopting a 110 construction method; in addition, because the length of the working face is twice of that of the working face of the 110 working method, the coal production efficiency is higher, the intensive production degree can be improved, and the comprehensive benefit is better during the working face extraction period.
(2) Compared with the '110 construction method', the 120 construction method can not only realize less entry retaining and less investment, but also greatly improve the labor efficiency, and finally fundamentally realize the purposes of reducing labor and improving efficiency, saving branch and reducing consumption, and realizing coal-pillar-free intensive production and mine intrinsic safety, thereby ensuring the maximization of the benefit of coal-pillar-free recovery and having extremely high popularization and application values.
Drawings
FIG. 1 is a schematic working surface of the present invention;
FIG. 2 is a schematic plan view of an example of the field application of the present invention;
FIG. 3 is a schematic view of a 110 construction method working surface.
1a represents a 120-method stope face; 2a, taking the retained roadway as an upper gateway of the working face when the upper working face is mined; 3a, tunneling into a lane as a middle lane of the working face; 4a, tunneling roadway is used as a lower gate way of the working face; 5a represents that a roadway is used as an upper gateway of a lower working face during stoping; 1s represents fresh air flow; 2s represents return air; 3s represents a stoping line; 4s represents the working face extraction direction; 1b denotes the 21108 preparation face down gate; 2b denotes 21108 preparation face intermediate lane; 3b denotes the 21106 down-the-plane gate; 4b denotes the 21106 face intermediate lane; 5b indicates that the gate way on the 21106 working face is formed by a 21104 working face entry; 6b denotes 21106 stope; 1c indicates entry as a gate on 21108 preparation face; 6a denotes a return airway; 1d represents a stope face of "110 construction method"; 2d represents the gate way on the previous working face; 3d, tunneling is used as a lower gate way of the previous working face; 4d, taking a retained roadway as a gateway on the working face during stoping; l represents the length of 1 normal working face, and under the condition of considering gas control and base plate pressure bearing water, the maximum length is generally considered as 180 m.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The longwall mining 120 method is that only one gateway and one middle lane are required to be tunneled when a double-length working face is arranged, the other gateway of the working face is borne by the lane reserved when the previous working face is mined (except for the first mining working face), and no lane-protecting coal pillar is reserved between sections. For example, a nearly horizontal coal seam is mined from top to bottom, and the invention schematic diagram is shown in fig. 1.
As can be seen from fig. 1, the length of a normal working face is L, only one gateway 4a and one middle lane 3a need to be tunneled when a double-length working face, that is, 2L long working face is arranged, the other gateway 2a is borne by the lane retaining when the previous working face is mined (except for the first mining working face), and along with the advance of 120 mining working faces 1a in the direction of 4s, the lane retaining is carried out on the gateway 4a dug by the double-length working face to form an upper gateway 5a of the next working face. Fresh air flow 1s mainly flows in through the upper gate way 2a, enters the return airway 6a from the flushing working face 1a to the entry retaining 5a, and adopts air control measures to adjust the entering of fresh air in the middle 3a and the lower gate way 4a, so that the full negative pressure ventilation of the working face of the longwall mining 120 method is ensured. In the working face of the 120-method, the coal outlet belt and the auxiliary transportation equipment are arranged on the lower gate way, and when air enters the upper gate way, the auxiliary transportation equipment can also be arranged on the upper gate way. The length of the working face is 2 times of that of the working face in the 110 construction method, and gas and bottom plate pressure-bearing water in a certain range at two sides of the working face are treated by using a middle lane. As can be seen from fig. 1, the newly excavated lower gate way, the middle lane and the upper gate way are cut by the working face to form a working face with double length. The working face with double length is brought into 1 working face with large mining length for mining by matching of three working faces and equipment type selection. In the process of stoping, roof cutting, pressure relief and gob-side entry retaining are carried out on the newly excavated lower gate way of the working face, so that the entry retaining quantity or the entry retaining engineering quantity of 1 double-length working face is reduced by 1 time compared with that of the 110 construction method under the condition that the total tunneling engineering quantity of the 1 double-length working face is equal to that of 2 working faces of the 110 construction method. Compared with the 110 construction method, the method has the advantages that the investment of extraction equipment and the installation and the removal of a working surface, the consumption of materials and manpower and the like are greatly reduced, and the installation and the removal times of the working surface are reduced by 1 time compared with the 110 construction method. Because the length of the working face of the 120 construction method is twice that of the working face of the 110 construction method, the storage capacity of the working face is large, and intensive recovery is facilitated, the coal production efficiency is higher, and the comprehensive benefit is better.
The working face is ventilated by adopting full wind pressure, air is fed by the upper and lower crossheading and the middle lane, the air inlet volume of the upper and lower crossheading and the middle lane is reasonably adjusted by taking measures, the air volume requirement during the production of the working face is met, and the return air of the whole working face enters the return air lane through the retained lane of the working face.
21106 comprehensive mining working face: 21106 the fully mechanized coal mining face adopts 120 method mining design layout, 5b of the upper gate is 1522m long, the gate is formed by cutting top and releasing pressure along the gate under 21104 the fully mechanized coal mining face, 4b of the middle gate is 1481m long, the design clean cross section is 10.64 square meters, net width is 3.8m, net height is 2.8 m; the length of a lower crossheading 3b is 1451m, a net section is designed to be 15.4 square meters, the net width is 4.4m, the net height is 3.5m, an intermediate roadway and the lower crossheading are supported by anchor net cables, a top plate is supported by a high-strength anchor rod, a metal net, a steel belt and an anchor rope beam, roadway sides are supported by a high-strength anchor rod and a metal net, in order to ensure the effect of roof cutting and pressure relief gob-side entry retaining and reduce the supporting cost as much as possible, a constant-resistance anchor rope and an entity coal side anchor rope are considered in place in a reinforcing manner when the lower crossheading is designed, and are supported in place once along with tunneling construction of the lower crossheading, a 21106 fully mechanized mining working face 6b is inclined to be 355.4m long, the coal seam is 1.1-3.4 m thick, the average thickness is 2.76m, the coal seam inclination angle is 1-8 degrees, the average 5 degrees, the working face burial depth is 784.9-863.1 m, a full-height roadway is mined once, the top plate is managed by adopting a retreating type full-, and the entry retaining 1c is used as a gate way on a 21108 fully mechanized mining face. Fresh air flow 1s mainly flows in through an upper gate way 5b, enters into an air return way 6a from a washed 21106 fully mechanized mining working face 6b to a retained way 1c, and adopts an air control measure to adjust the entering of fresh air in a 21106 middle way 4b and a gate way 3b under 21106, so as to ensure the full negative pressure ventilation of the 21106 fully mechanized mining working face, as shown in figure 2;
21106 roadway construction and retaining conditions under the fully mechanized mining face: 21106 the advance support of the lower gate of the working face adopts a support form of 'single prop + n-shaped beam', one beam and three columns, and the support length is 20 m; when the front supporting shed enters the rear supporting zone, the hydraulic supporting shed is used in groups, the hydraulic supporting shed at the extraction side is 1100mm in the inclined lane, the hydraulic supporting shed at the coal column side is 800mm in the inclined lane, the center distance of the hydraulic supporting shed is 1900mm, the single supports at the coal column side and the II-type beam frame shed supports at the 160-300 m section of the rear supporting shed are used in groups, the single supports at the extraction side are 800mm in the inclined lane, the single supports at the extraction side are 1500mm in the inclined lane, and the single supports at the coal column side are 1200mm in the inclined lane; entering a lane forming stable area after the gob-side entry retaining is 300m, and adopting shed returning measures such as 'one-in-one-off', 'two-in-one-off' or 'three-in-one-off' according to the field mine pressure stable condition and the entry retaining roof condition. According to actual measurement, the width of the roadway after the roadway is stabilized is 3367-4222 mm, the deformation of the coal pillar side roadway side is 261-496 mm, the deformation of the roadway side is 176-401 mm, the sinking amount of the top plate is 242-435 mm, and the bottom bulging amount is 364-825 mm. Because most of the retained roadway width is more than 3800mm, proper brushing, expanding and bottoming are carried out on the roadway part with the width smaller than 3600mm and the roadway bottom bulge part, and the retained roadway use requirement can be met.
21106 the method of the 120 construction method of the fully mechanized mining face has the following effects: 21106 the fully mechanized coal mining face starts trial production in 2018, 4-13 th month, the face tries to produce 65864t of coal, 50.5m of entry, 170683t of output in 5 months, 84.9m of entry, 1420 t of coal cutting in maximum single-blade of face in the month, and refreshes new record of coal mining and coal cutting in single-blade for mining. Wherein, after 5 months and 16 days, the working face cuts coal 1.28 ten thousand tons per day, and the single face cuts coal per day, thereby breaking through the ten thousand ton customs for the first time. Through statistics, the production efficiency of raw coal of a mine fully-mechanized mining team is improved to 1010 t/man-month from 620 t/man-month when a 21304 fully-mechanized mining working face adopts a 110 working method, and is improved by 63%. Because the length of the 21106 fully-mechanized mining working face is 2 times of the length of the 21304 fully-mechanized mining working face, the propelling degree, namely the entry retaining progress, is also reduced to 0.47 m/month from 0.85 m/month when the 21304 fully-mechanized mining working face adopts a 110 construction method, and is reduced by 45%, namely, under the condition that the monthly yield of the working face is increased, the entry retaining cost is reduced by 45% every month. In addition, according to the lane keeping cost of 6000 yuan/m, the lane keeping maintenance cost of 1000 yuan/m and the repairing cost of 2000 yuan/m before the lane keeping is put into use, 21106 one '120-method' fully-mechanized mining working face is reduced by one lane keeping, and the lane keeping cost of 1481m (6000+1000+2000) yuan/m =1332.9 ten thousand yuan can be saved. The comprehensive cost of the whole mine is greatly reduced, the effect of reducing people and improving efficiency is obvious under the condition of unchanged mine yield, and the economic benefit and the social benefit are huge.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A longwall mining 120 method is characterized in that: only one gateway and one middle lane need to be tunneled when a double-length working face is arranged, the other gateway of the working face is born by the lane reserved when the previous working face is mined, the first mining working face is excluded, and no lane-protecting coal pillar is reserved between sections.
2. A longwall mining 120 method as claimed in claim 1, wherein: under complex hydrogeological conditions or high-gas and coal and gas outburst mine conditions, drilling and grouting treatment is carried out on the working face bottom plate confined water by using an upper gate way, a lower gate way and a middle lane, or gas extraction treatment is carried out on the working face coal seam by using the upper gate way, the lower gate way and the middle lane.
3. A longwall mining 120 method as claimed in claim 1, wherein: and the working face is required to adopt roof cutting pressure relief gob-side entry retaining measures for the newly excavated gate way before stoping, and the entry is retained while stoping in the stoping process of the working face.
4. A longwall mining 120 method as claimed in claim 1, wherein: the working face coal discharging belt and the auxiliary conveying equipment are arranged on the lower gate way; under the condition of utilizing the air inlet of the upper crossheading, the auxiliary transportation equipment can also be arranged on the upper crossheading.
5. A longwall mining 120 method as claimed in claim 1, wherein: the working face coal seam occurrence condition is suitable for mining the full height at one time.
6. A longwall mining 120 method as claimed in claim 1, wherein: and the middle lane and the newly excavated crossheading are actively supported by anchor nets and anchor cables.
7. A longwall mining 120 method as claimed in claim 1, wherein: the middle lane is mainly used for coal seam gas control in working faces on two sides of the middle lane and drilling and grouting transformation of a confined aquifer of a coal seam floor, and the middle lane is mainly used for gas control of a coal seam in the middle of a double-length working face and drilling and grouting transformation of the confined aquifer of the coal seam floor.
8. A longwall mining 120 method as claimed in claim 1, wherein: the working face and the retained roadway are ventilated by full wind pressure, when a nearly horizontal coal seam is mined from top to bottom, air can be fed into an upper crossheading, a lower crossheading and a middle roadway, and wind flows through the coal face and the retained roadway, enters a return airway and finally enters total return air.
CN201911307148.9A 2019-12-18 2019-12-18 Long wall mining 120 method Pending CN111119891A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111828005A (en) * 2020-07-24 2020-10-27 北京中矿创新联盟能源环境科学研究院 Face mining method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2151294C1 (en) * 1999-03-18 2000-06-20 Институт угля и углехимии СО РАН Method of horizontal slicing of thick steep coal seam
RU2407890C1 (en) * 2009-09-14 2010-12-27 Государственное образовательное учреждение высшего профессионального образования "Южно-Российский государственный технический университет (Новочеркасский политехнический институт)" Method of mining of mine sections
CN105178962A (en) * 2015-06-24 2015-12-23 何满潮 Longwall mining method 110
CN105240013A (en) * 2015-06-24 2016-01-13 何满潮 Longwall mining N00 construction method
CN109083674A (en) * 2018-10-30 2018-12-25 中国矿业大学(北京) A kind of safety clean ventilating system suitable for cutting top 110 engineering method of release exploitation working face
CN109630112A (en) * 2018-10-26 2019-04-16 山东科技大学 A kind of N00 mining codes for cutting top filling
CN110374597A (en) * 2019-06-26 2019-10-25 陕西永明煤矿有限公司 Thin seam working surface partial mining stays the rectangle gob-surrounded pillar setting method in lane

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2151294C1 (en) * 1999-03-18 2000-06-20 Институт угля и углехимии СО РАН Method of horizontal slicing of thick steep coal seam
RU2407890C1 (en) * 2009-09-14 2010-12-27 Государственное образовательное учреждение высшего профессионального образования "Южно-Российский государственный технический университет (Новочеркасский политехнический институт)" Method of mining of mine sections
CN105178962A (en) * 2015-06-24 2015-12-23 何满潮 Longwall mining method 110
CN105240013A (en) * 2015-06-24 2016-01-13 何满潮 Longwall mining N00 construction method
CN107905790A (en) * 2015-06-24 2018-04-13 何满潮 Broadwall N00 engineering methods
CN109630112A (en) * 2018-10-26 2019-04-16 山东科技大学 A kind of N00 mining codes for cutting top filling
CN109083674A (en) * 2018-10-30 2018-12-25 中国矿业大学(北京) A kind of safety clean ventilating system suitable for cutting top 110 engineering method of release exploitation working face
CN110374597A (en) * 2019-06-26 2019-10-25 陕西永明煤矿有限公司 Thin seam working surface partial mining stays the rectangle gob-surrounded pillar setting method in lane

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
何满潮等: "长壁开采切顶短壁梁理论及其110工法-第三次矿业科学技术变革", 《煤炭科技》 *
温中义: "永城矿区大埋深、中厚煤层无煤柱开采实践", 《地下空间与工程学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111828005A (en) * 2020-07-24 2020-10-27 北京中矿创新联盟能源环境科学研究院 Face mining method
CN111828005B (en) * 2020-07-24 2021-03-30 北京中矿创新联盟能源环境科学研究院 Face mining method

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Application publication date: 20200508