CN111828072A - Arched flexible shield support and system for gob-side entry retaining of coal mine - Google Patents
Arched flexible shield support and system for gob-side entry retaining of coal mine Download PDFInfo
- Publication number
- CN111828072A CN111828072A CN202010718182.1A CN202010718182A CN111828072A CN 111828072 A CN111828072 A CN 111828072A CN 202010718182 A CN202010718182 A CN 202010718182A CN 111828072 A CN111828072 A CN 111828072A
- Authority
- CN
- China
- Prior art keywords
- support
- gob
- support body
- arch
- side entry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 37
- 238000005065 mining Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 17
- 230000008093 supporting effect Effects 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000003139 buffering effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0034—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a goaf shield articulated to a base member
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0086—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor in galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to an arch-shaped flexible shield support and an arch-shaped flexible shield system for gob-side entry retaining of a coal mine, and belongs to the field of coal mining. The support comprises a support body and a hydraulic prop, the support body is of a three-section type arch structure, the hydraulic prop supports a first bow arm of the support body, and the hydraulic prop support is vertically intersected with the first bow arm and has retractility; the system comprises a plurality of the supports which are sequentially arranged along the extending direction of the roadway. The normal direction surface of the support body is arranged towards the mining area. The hydraulic support can be used for supporting and shielding a large number of rock blocks collapsed in a goaf, buffering the rolling impact force of the rock blocks, and providing a heavy and straight supporting force for a coal seam roof by the hydraulic support to prevent the roof from being broken; the steel wire rope passes through the shield supports, and all the shield supports are connected together along the stoping roadway, so that the good working characteristics of the shield supports are kept. The invention is used for gob-side entry retaining support of the stope face of inclined and steep coal seams, can well control the stability of surrounding rocks of the roadway and ensures the safety of gob-side entry retaining of the coal seams.
Description
Technical Field
The invention belongs to the field of coal mining equipment, and relates to an arched flexible shield support and an arched flexible shield system for a gob-side entry retaining of a coal mine.
Background
Coal is a basic energy source and an important raw material. The coal industry is an important basic industry in relation to economic life and energy safety. In primary energy structures, coal will have long been the dominant energy source. Coal is mainly mined by underground mining, and the length of a mining roadway accounts for about 60% of the total length of the roadway. For a long time, most of mining area roadways are protected by coal pillars, so that the loss amount of coal is large and accounts for about 40% of the total loss amount of coal of all mine. Along with coal mining constantly extends to the deep, former rock stress increases, and the lane coal pillar width of protecting is more big more remaining, and the coal extraction rate reduces by a wide margin, and the tunnel maintenance degree of difficulty increases by a wide margin. Therefore, the gob-side entry retaining is adopted, one lane is dual-purpose, and the coal recovery rate is increased, so that the method has important significance.
At present, a gob-side entry retaining gob-side entry protecting method mainly comprises the following steps: the gangue is bagged, stacked and supported, so that the support strength is low and the support effect is poor; the concrete pier columns are used for protecting the roadway, and gangue among the pier columns can easily roll to block the roadway; the construction efficiency is low by building the precast concrete block wall support, the stress of the wall is uneven, and the wall is damaged in different degrees; the pumped cementing material is filled and supported, the supporting effect is good, and the cost is higher. Moreover, the traditional supporting structure is generally a rigid structure, and when the borne pressure is greater than the strength of the rigid structure, the rigid structure is very easy to damage, so that the supporting is disabled, and a roadway is blocked. Therefore, the gob-side entry retaining technology which is economical, good in supporting effect and higher in construction efficiency needs to be researched and developed.
Disclosure of Invention
In view of the above, the present invention provides an arch-shaped flexible shield support and a system for a gob-side entry retaining of a coal mine, which can deform according to the magnitude of the pressure borne by the arch-shaped flexible shield support, adjust the pressure borne by a support body, prevent the support body from being damaged, and ensure the support effect.
In order to achieve the purpose, the invention provides the following technical scheme: an arch-shaped flexible shield support for a coal mine gob-side entry retaining comprises a support body and a hydraulic prop, wherein the normal direction of the support body is arranged towards a mining area, and the hydraulic prop is arranged on one side, away from the mining area, of the support body; the hydraulic prop is connected to the support body, and the extending direction of the support body is intersected with the extending direction of the hydraulic prop.
Optionally, the bracket body is arched or circular arc-shaped, and the bracket body is bent towards a direction away from the goaf area.
Optionally, the hydraulic prop is arranged in the direction of gravity.
Optionally, the stent body is in an arch shape, the stent body comprises an arch body and arch arms arranged at two ends of the arch body, and an included angle between each arch arm and the corresponding arch body is 135 degrees.
Optionally, the pantograph arm comprises a first pantograph arm and a second pantograph arm, the first pantograph arm is arranged between the pantograph body and the hydraulic prop, and the length of the first pantograph arm is greater than that of the second pantograph arm.
Optionally, the bracket body is in an arch shape and is made of i-shaped steel through cutting and welding.
Optionally, a connecting ring for connecting a steel wire rope is arranged on the bracket body.
An arch-shaped flexible shield system for a coal mine gob-side entry retaining comprises a plurality of shield supports according to any one of the above items, wherein the plurality of shield supports are sequentially arranged along the extending direction of a roadway.
Optionally, the spacing between adjacent shield supports is between 0.15m and 0.3 m.
Optionally, adjacent shield supports are connected in sequence by steel wire ropes, so that the working characteristics of the supports are guaranteed, and effective supporting force and shield are provided.
Optionally, the adjacent shield support is provided with a wood plate on one side close to the goaf area and one side of the back solid roadway for blocking the caving rock.
The invention has the beneficial effects that: 1. this body coupling of support is on hydraulic prop, and the extending direction of support body is crossing with hydraulic prop's extending direction, and the effort of piece passes through the support body and transmits to hydraulic prop, and when the piece that caves down increases, the effort that the support body transmitted to hydraulic prop is greater than hydraulic prop's predetermined power value, and hydraulic prop is compressed, and the contained angle increases between support body and the hydraulic prop, and support body atress reduces, prevents that the support body from destroying. Meanwhile, after the stress of the hydraulic prop is increased and the hydraulic prop is compressed, the volume in the hydraulic prop is reduced, the pressure intensity is increased, and the supporting force of the hydraulic prop is increased until the pressure transmitted to the hydraulic prop from the support body is rebalanced. The invention is used for gob-side entry retaining support of the stope face of an inclined or steep coal seam, can well support and shield the rock mass collapsed in the roadway, buffers the rolling impact force of the rock mass, and ensures the stability and safety of gob-side entry retaining surrounding rock. 2. The connecting ring used for connecting the steel wire rope is arranged on the support body, the steel wire rope penetrates through the shield supports, all the shield supports are connected together along a stoping roadway, the support body with good working characteristics of the supports and the hydraulic prop are simple in structure and convenient to manufacture, the support body can be arranged in the roadway before gob-side entry retaining, the mining progress is guaranteed, and the mining efficiency is improved. 3. The support body and the hydraulic prop are arranged in the roadway, can be recycled after mining is finished, and are repeatedly used, so that the mining cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a steeply inclined coal seam laying-down pseudo-inclined mining coal face;
FIG. 2 is a schematic diagram of an arch-shaped flexible shield support for gob-side entry retaining of a coal mine and a system thereof;
fig. 3 is a structural schematic diagram of the stent body.
Reference numerals: the support comprises a support body 1, a first bow arm 11, a bow body 12, a second bow arm 13, a connecting ring 14, a hydraulic prop 2, a working face haulage roadway 3 and a large number of rock blocks 4 which are collapsed in a mining area.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 3, an arch-shaped flexible shield system for a coal mine gob-side entry retaining includes a plurality of flexible shield supports, and the shield supports are disposed in a working face haulage roadway 3 along an extending direction of the working face haulage roadway 3. The shield support comprises a support body 1 and a hydraulic support column 2, wherein the hydraulic support column 2 is arranged on one side, away from a mining area, of the support body 1, and the hydraulic support column 2 is arranged along the gravity direction. The fixed end of the hydraulic prop 2 and one end of the support body 1 are arranged on the ground of the working face haulage roadway 3, and the movable end of the hydraulic prop 2 is connected to the other end of the support body 1. The extending direction of the liquid support body 1 is intersected with the extending direction of the hydraulic prop 2, and the normal direction of the support body 1 is arranged towards the mining area.
In this embodiment, the width of the working face haulage roadway 3 is 3.11m, and the height of the hydraulic prop 2 is 2.23 m. The support body 1 is of an arch structure, is made of I-shaped steel through cutting and welding, and has the functions of supporting and shielding surrounding rocks. The I-shaped steel has high structural strength and low material cost, and the arched bracket body 1 has simple processing technology and is suitable for mass application. The stent body 1 is bent toward a direction away from the mined out area. The bracket body 1 is of a three-section type and comprises an arch body 12 and arch arms arranged at two ends of the arch body 12, and an included angle between each arch arm and the corresponding arch body 12 is 135 degrees. The bow arm comprises a first bow arm 11 and a second bow arm 13, the first bow arm 11 is arranged between the bow body 12 and the hydraulic support column 2, and the first bow arm 11 is perpendicular to the hydraulic support column. The length of the first bow arm 11 and the bow 12 is 1.6m, the length of the second bow arm 13 is 1.2m, and the length of the first bow arm 11 is larger than that of the second bow arm 13. The bracket body 1 is also provided with 4 connecting rings 14. The connecting rings 14 facilitate the connection of the wire ropes between the shield supports.
In actual mining, the distance between the adjacent shield supports is 0.15-0.3 m. The adjacent shield supports are connected by 4 steel wire ropes, so that the working form of the supports is ensured, a continuous support body is formed along the extension direction of the working face haulage roadway 3, the working characteristics of the supports can be fully exerted, and the support and shield functions are realized. And a wood board is arranged on one side of the shield support close to the mining area, so that a large number of rock blocks 4 collapsed in the mining area are further blocked.
When the coal mining working face is pushed forward, the direct roof collapses, a large number of rock blocks 4 collapsing in the mining area roll along the bottom plate, the support body 1 supports and shields the large number of rock blocks 4 collapsing in the mining area, the tunnel is prevented from being blocked by the large number of rock blocks 4 collapsing in the mining area, after the old roof is broken for the first time and periodically, the large number of rock blocks 4 collapsing in the mining area behind the support are compacted, the mine pressure of the top plate is supported, and the stability of the tunnel is protected. The support body 1 supports a large number of rock blocks 4 caving in a mining area, and the rock blocks are prevented from blocking a roadway. The effort of piece passes through support body 1 and transmits to hydraulic prop 2, increases when the piece, and support body 1 transmits to hydraulic prop 2's effort when being greater than hydraulic prop 2's preset power value, and hydraulic prop 2 is compressed, and the contained angle increases between support body 1 and the hydraulic prop 2, and support body 1 atress reduces, prevents that support body 1 from destroying. Meanwhile, after the hydraulic prop 2 is compressed due to the increase of the stress, the volume in the hydraulic prop 2 is reduced, the pressure intensity is increased, and the supporting force of the hydraulic prop 2 is increased until the pressure transmitted to the hydraulic prop 2 by the support body 1 is rebalanced.
The hydraulic prop 2 is deformed through compression, so that the pressure born by the hydraulic prop 2 is increased, the pressure born by the support body 1 is reduced, the support body 1 can be effectively protected, and support failure and roadway blockage caused by damage of the support body 1 are prevented. Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a colliery gob entry bow-shaped flexible shield support which characterized in that: the support comprises a support body and a hydraulic prop, wherein the normal direction of the support body is arranged towards a mining area, and the hydraulic prop is arranged on one side of the support body, which is far away from the mining area;
the hydraulic prop is connected to the support body, and the extending direction of the support body is intersected with the extending direction of the hydraulic prop.
2. The arch-shaped flexible shield support for the gob-side entry of the coal mine according to claim 1, wherein: the support body is bow-shaped or arc-shaped, and the support body is bent towards the direction far away from the goaf area.
3. The arch-shaped flexible shield support for the gob-side entry of the coal mine according to claim 1, wherein: the hydraulic prop is arranged along the gravity direction.
4. The arch-shaped flexible shield support for the gob-side entry of the coal mine according to claim 1, wherein: the bracket body is in an arc shape, the bracket body comprises an arc body and arc arms arranged at two ends of the arc body, and an included angle between each arc arm and the corresponding arc body is 135 degrees.
5. The arch-shaped flexible shield support for the gob-side entry of the coal mine according to claim 4, wherein: the bow arm comprises a first bow arm and a second bow arm, the first bow arm is arranged between the bow body and the hydraulic prop, and the length of the first bow arm is greater than that of the second bow arm.
6. The arch-shaped flexible shield support for the gob-side entry of the coal mine according to claim 1, wherein: the support body is bow-shaped, and the support body is made of I-shaped steel through cutting and welding.
7. The arch-shaped flexible shield support for the gob-side entry of the coal mine according to claim 1, wherein: and the support body is provided with a connecting ring for connecting a steel wire rope.
8. The utility model provides a flexible shield system of colliery gob entry bow-shaped which characterized in that: comprising a plurality of shield supports according to any one of claims 1 to 6, which are arranged one after the other in the direction of extension of the roadway.
9. The arch-shaped flexible shield system for the gob-side entry of the coal mine according to claim 8, wherein: the distance between adjacent shield supports is 0.15 m-0.3 m.
10. The arch-shaped flexible shield system for the gob-side entry of the coal mine according to claim 8, wherein: the adjacent shield supports are connected in sequence by steel wire ropes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718182.1A CN111828072A (en) | 2020-07-23 | 2020-07-23 | Arched flexible shield support and system for gob-side entry retaining of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718182.1A CN111828072A (en) | 2020-07-23 | 2020-07-23 | Arched flexible shield support and system for gob-side entry retaining of coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111828072A true CN111828072A (en) | 2020-10-27 |
Family
ID=72925241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010718182.1A Pending CN111828072A (en) | 2020-07-23 | 2020-07-23 | Arched flexible shield support and system for gob-side entry retaining of coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111828072A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669097A (en) * | 2021-09-10 | 2021-11-19 | 辽宁工程技术大学 | Movable mining and tunneling arch-shaped flexible shield support for coal mine |
| CN115992727A (en) * | 2023-02-28 | 2023-04-21 | 四川川煤石洞沟煤业有限责任公司 | Adjustable buffer type steeply inclined comprehensive mining roadway support |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414221A1 (en) * | 1984-04-14 | 1985-10-24 | Thyssen Industrie AG Schmiedetechnik/Bergbautechnik, 4100 Duisburg | Shield-type support assembly with tangential link |
| CN1048580A (en) * | 1990-03-21 | 1991-01-16 | 汤文海 | Telescopic flexible metal shield support |
| CN103643975A (en) * | 2013-12-27 | 2014-03-19 | 重庆天巨承机械制造有限责任公司 | Supporting unit for steeply-inclined medium-thickness coal seam flexibility shielding system |
| CN103775085A (en) * | 2012-10-25 | 2014-05-07 | 泰安市华硕能源科技有限公司 | Flexible shield support excavation integrated supporting coal-pillar-free mining method of steep medium-thickness coal seam |
| CN203856487U (en) * | 2014-04-15 | 2014-10-01 | 山东科技大学 | Flexible cover combined support for cut and fill mining of steep inclined coal seam |
| CN204253064U (en) * | 2014-11-23 | 2015-04-08 | 四川省华蓥山煤业股份有限公司李子垭南煤矿 | A kind of Telescopic flexible shield support |
| CN108625853A (en) * | 2018-04-24 | 2018-10-09 | 山东东山矿业有限责任公司株柏煤矿 | A kind of flexible type shield coal-mining method of half-edge coal seam |
| CN110359908A (en) * | 2019-06-14 | 2019-10-22 | 牛永东 | A kind of half-edge coal seam flexible type shield power choring coal-mining method |
-
2020
- 2020-07-23 CN CN202010718182.1A patent/CN111828072A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414221A1 (en) * | 1984-04-14 | 1985-10-24 | Thyssen Industrie AG Schmiedetechnik/Bergbautechnik, 4100 Duisburg | Shield-type support assembly with tangential link |
| CN1048580A (en) * | 1990-03-21 | 1991-01-16 | 汤文海 | Telescopic flexible metal shield support |
| CN103775085A (en) * | 2012-10-25 | 2014-05-07 | 泰安市华硕能源科技有限公司 | Flexible shield support excavation integrated supporting coal-pillar-free mining method of steep medium-thickness coal seam |
| CN103643975A (en) * | 2013-12-27 | 2014-03-19 | 重庆天巨承机械制造有限责任公司 | Supporting unit for steeply-inclined medium-thickness coal seam flexibility shielding system |
| CN203856487U (en) * | 2014-04-15 | 2014-10-01 | 山东科技大学 | Flexible cover combined support for cut and fill mining of steep inclined coal seam |
| CN204253064U (en) * | 2014-11-23 | 2015-04-08 | 四川省华蓥山煤业股份有限公司李子垭南煤矿 | A kind of Telescopic flexible shield support |
| CN108625853A (en) * | 2018-04-24 | 2018-10-09 | 山东东山矿业有限责任公司株柏煤矿 | A kind of flexible type shield coal-mining method of half-edge coal seam |
| CN110359908A (en) * | 2019-06-14 | 2019-10-22 | 牛永东 | A kind of half-edge coal seam flexible type shield power choring coal-mining method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669097A (en) * | 2021-09-10 | 2021-11-19 | 辽宁工程技术大学 | Movable mining and tunneling arch-shaped flexible shield support for coal mine |
| CN115992727A (en) * | 2023-02-28 | 2023-04-21 | 四川川煤石洞沟煤业有限责任公司 | Adjustable buffer type steeply inclined comprehensive mining roadway support |
| CN115992727B (en) * | 2023-02-28 | 2023-11-03 | 四川川煤石洞沟煤业有限责任公司 | Adjustable buffer type steeply inclined comprehensive mining roadway support |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109763822B (en) | Large-dip-angle thick coal seam multi-section coal pillar-free staggered layer roadway protection and inter-section coal pillar-free filling method | |
| CN103410515B (en) | It is a kind of that three-soft seam is reciprocating combines mining method without coal column | |
| CN104358572B (en) | Non-pillar mining technology by spontaneous caving filling roadway at large inclined angle steeply inclined seam | |
| CN103397905A (en) | System and method for achieving natural striding, falling and filling of coal beds, flexible roadway protection and complete gob-side entry retaining | |
| CN103557000B (en) | Method for preventing gob-side entry rock burst through side-drawing filling | |
| CN105003288B (en) | A kind of method and support system of medium-thickness seam gob side entry retaining | |
| CN107725052B (en) | One kind, which is adopted, stays integration exploitation gob side entry top plate constant-resistance anchor body beam method for protecting support | |
| CN101942999A (en) | Coal mining method for high-dipping low seam | |
| CN104088639A (en) | Large-inclination angle thick coal seam strike long-wall workface large-mining height mining method | |
| CN111828072A (en) | Arched flexible shield support and system for gob-side entry retaining of coal mine | |
| CN104632220A (en) | Mining method with adjustable and controllable structure size of gentle dip medium-thickness ore body strip column reconstructed stope | |
| CN108843354A (en) | A kind of inclined super high seam lane top asymmetric anchor stalk method for protecting support of gob side entry driving | |
| CN101906982B (en) | Two-stage side guard transition bracket for large height mining face | |
| CN204327140U (en) | A kind of gob side entry retaining gear cash device | |
| CN102720498A (en) | Gob-side entry retaining mining process for coal face | |
| CN104453944A (en) | Coal-pillar-impacting-preventing roadway protecting method | |
| CN105134212B (en) | A kind of method that three soft high seam tunnel ensures the rate of extraction along top driving longwall top coal caving | |
| CN104405392B (en) | Three soft high seam tunnel jackings are kept on file anchor rete cord active support longwall top coal caving method | |
| CN105134215A (en) | Local filling mining method for longwall face along strike of steeply dipping seam | |
| CN110359910B (en) | Fully mechanized caving high-level filling mining method for thick coal seam strips under coal mine railway | |
| CN102418525A (en) | Soft coal seam long-wall high-mining-height comprehensive mechanized coal mining end mining method | |
| CN104948191A (en) | Method for preventing and treating rock burst by using filling mode | |
| CN204984458U (en) | Medium -thickness seam gob entry's support system | |
| CN102425417A (en) | Anchor cable and rough wall combined method for gob-side entry retaining stage under collapsible roof | |
| CN115653602A (en) | Reserved interval type pillar upward access filling mining method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |