CN113738438B - Integrated green mining method for coal pillar recovery and gangue filling - Google Patents
Integrated green mining method for coal pillar recovery and gangue filling Download PDFInfo
- Publication number
- CN113738438B CN113738438B CN202111078040.4A CN202111078040A CN113738438B CN 113738438 B CN113738438 B CN 113738438B CN 202111078040 A CN202111078040 A CN 202111078040A CN 113738438 B CN113738438 B CN 113738438B
- Authority
- CN
- China
- Prior art keywords
- coal
- recovery
- gangue
- coal pillar
- filling
- 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.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 328
- 238000011084 recovery Methods 0.000 title claims abstract description 168
- 238000011049 filling Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000005065 mining Methods 0.000 title claims abstract description 49
- 239000010878 waste rock Substances 0.000 claims abstract description 109
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000005429 filling process Methods 0.000 claims abstract description 6
- 239000011435 rock Substances 0.000 claims description 34
- 239000002699 waste material Substances 0.000 claims description 32
- 238000003860 storage Methods 0.000 claims description 15
- 238000004064 recycling Methods 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 7
- 230000005641 tunneling Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003904 radioactive pollution Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a coal pillar recovery and gangue filling integrated green mining method, which comprises the following steps: determining reasonable coal pillar recovery and gangue filling processes and parameters based on mine pressure and production technical conditions; when the coal pillars are recovered, the coal pillars are advanced to the stope face for a certain distance, and the coal pillars on one side of the stope roadway are continuously recovered or intermittently recovered by adopting a coal breaking and transporting machine; in the coal pillar recovery process, temporary supporting is carried out on a suspended top plate in a recovery area in time, or the top plate is supported by adopting a supporting coal pillar which is reserved in a spacing recovery mode and matching with the temporary supporting; and after the coal pillar is recovered for a certain distance, dismantling the temporary support and filling the extracted space of the coal pillar recovery area with waste rock by using a waste rock filling system. According to the invention, coal pillar recovery and gangue filling are organically combined, so that the extraction rate of coal resources is improved, adjacent roadways are protected by gangue filling, the purpose that gangue does not rise in a well is realized, and the problems of environmental pollution and ecological hazard caused by mine gangue discharge are solved.
Description
Technical Field
The invention relates to the technical field of green mining of coal mines, in particular to a green mining method integrating coal pillar recovery and gangue filling.
Background
Along with the increase of the mining depth and the mining intensity of coal resources, coal seam occurrence and mining conditions are increasingly complex, dynamic pressure of a stoping roadway is increasingly severe, in order to weaken the influence of mining on a lateral adjacent roadway of a working face, a surrounding rock control mode of reserving a large coal pillar with the width of 20-30 m to protect the roadway is adopted in part of coal mines, and the large coal pillar roadway protection mode causes great waste of the coal resources. Coal resources are non-renewable resources, and how to improve the recovery rate of the coal resources and realize safe and efficient mining of the coal resources is one of the technical problems which need to be solved urgently in the current coal mine.
On the other hand, a large amount of gangue is generated in the production process of the coal mine, and particularly for a high gas mine and a high outburst mine, a large amount of gas drainage roadways need to be tunneled in a rock stratum, so that a large amount of gangue is generated. At present, the waste rock is treated by directly discharging the waste rock on the ground surface to form a waste rock mountain, the discharged waste rock causes serious harm to the environment and the ecology of a mining area, mainly occupies large-area land, pollutes the mine environment, and causes air pollution, water pollution, collapse of the waste rock mountain, spontaneous combustion or explosion, radioactive pollution and the like. The waste rock is promoted to ground in the current colliery, has not only wasted a large amount of manpower, material resources and financial resources, has caused the improvement of coal manufacturing cost, and the waste rock that promotes to ground has caused a large amount of pollutions and harm to natural environment moreover, needs to solve the emission problem of waste rock urgently.
The method aims at solving the problems of coal resource waste caused by roadway protection of large coal pillars and environmental pollution and ecological hazard caused by mine waste rock discharge, combines coal pillar recovery and waste rock filling, and recovers partial coal pillar resources by underground waste rock filling, thereby being one of effective ways for solving the current technical problems.
Disclosure of Invention
The invention provides a coal pillar recovery and waste rock filling integrated green mining method for solving the problems of coal pillar recovery and underground waste rock treatment, and aims to realize the purpose of replacing coal with waste rock by filling the underground waste rock into a goaf of a recovered coal pillar, and provide support for a top plate above the recovered coal pillar by filling the waste rock, so that the problems of coal resource waste caused by roadway protection of a large coal pillar and environmental pollution and ecological hazard caused by mine waste rock discharge are effectively solved, the recovery rate of coal resources is effectively improved, the green mining of the waste rock without rising a well is realized, and the problems in the prior art are solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a coal pillar recovery and gangue filling integrated green mining method, wherein a coal pillar refers to a section coal pillar on one side of a stoping roadway, and the method comprises the following steps:
the method comprises the following steps of firstly, before coal pillar recovery, researching and determining reasonable coal pillar recovery and gangue filling processes and parameters based on mine pressure, ventilation, transportation, equipment and other production technical conditions, and mainly comprising the following steps of: coal pillar recovery, roof support of a coal pillar recovery area, gangue transportation and gangue filling of a recovery area;
step two, coal pillar recovery: when the coal pillars are recovered, the coal pillars are advanced to the recovery working face for a distance, corresponding coal breaking and transporting machinery is adopted to recover the coal pillars on one side of the recovery roadway according to the designed recovery width a meters, an isolation coal pillar is reserved between the coal pillars and the protected recovery roadway, and the recovery of the coal pillars with the corresponding cycle length b meters is completed, wherein the recovery process comprises the working procedures of coal breaking, coal loading and coal transporting; when the coal pillar is recovered, two modes are adopted: the method comprises the following steps of continuously recycling the coal pillars within a designed recycling width range; the coal pillar is recycled at intervals, namely when the coal pillar is recycled, a supporting coal pillar with the length of c meters is reserved every time b meters of a certain distance is recycled;
thirdly, supporting a top plate of a coal pillar recovery area: in the coal pillar recovery process, temporary support is timely carried out on a suspended top plate in a rear recovery area, the recovery safety is guaranteed, and meanwhile conditions are provided for gangue filling; the regional roof support parameters need to be comprehensively determined according to surrounding rock stress, surrounding rock structure and mechanical parameters, coal pillar recovery region space size parameters and the like;
step four, gangue transportation and regional gangue filling of recovery: after the coal pillar is recycled for a certain distance of b meters, performing gangue filling on an area with the coal pillar recycling length of b meters: the method comprises the steps that waste rocks generated in the process of tunneling a tunnel or an underground chamber of a coal mine are transported to a coal pillar recovery area by a waste rock transport machine, then temporary supports are removed in sections, a waste rock filling system is used for filling the mining space of the coal pillar recovery area with the waste rocks, the mining space is guaranteed to be filled with the waste rocks compactly, a side is connected and a roof is connected, the waste rocks generated in the coal mine are fully utilized, and green coal mining that the coal is replaced by the waste rocks without lifting a well is realized;
and step five, after the coal pillar recovery and the gangue filling of one cycle length of b meters are completed, continuing the coal pillar recovery and the gangue filling of the next cycle until the coal pillar is pushed to a coal face stopping line.
Furthermore, in the second step, firstly, the stoping face is advanced for a certain distance, an equipment channel with the width of a meter is dug on a coal pillar side on one side of the stoping roadway, and the coal pillar recovery equipment is installed to the equipment channel; and then, coal breaking and loading of the recovered coal pillars are realized by utilizing coal pillar recovery equipment, the coal is unloaded onto a reversed loader, the coal is transferred onto a belt conveyor of a stope face through the reversed loader, and the coal is transported out by utilizing the belt conveyor.
Furthermore, the coal pillar recovery equipment adopts a roadway repairing machine integrating the functions of coal breaking and coal loading, so that the recovery and mining of the coal pillars are realized, and broken coal is loaded onto a belt conveyor of a stope face.
Furthermore, in the third step, in the coal pillar recovery process, the top plate support in the recovery area has three structures, the first structure is that a single hydraulic prop is matched with a hinged top beam to temporarily support the top plate, and the temporary support needs to follow the coal pillar recovery working face; the second structure is that an anchor rod, an anchor cable and a metal net are adopted for supporting; the third structure is to retrieve the coal pillar at intervals, adopt support the coal pillar and retrieve regional temporary support and support the roof, through support the coal pillar and not only can strengthen the support to the roof, can also reduce the regional temporary support intensity of retrieving, simplify the regional temporary support technology of retrieving.
Furthermore, in the third step, when the coal pillar stability is poor in the coal pillar recovery process, the coal pillars are recovered at intervals, and supporting and maintaining conditions of the top plate are improved through the supporting coal pillars.
Further, in the fourth step, two waste rock transportation and filling systems are included, wherein one system is a continuous waste rock transportation and filling system, waste rock produced on the roadway driving working face is transported to a coal pillar recovery area by a belt conveyor, then the waste rock is unloaded to the coal pillar recovery area by a transfer machine or a waste rock filling machine, and the waste rock is compacted and jacked by the waste rock filling machine; the other method is to adopt an intermittent waste rock transportation and filling system, namely, a temporary waste rock storage bin is arranged in the middle link of waste rock transportation, a mine car is adopted to carry out discontinuous waste rock transportation, the waste rock is transported to a coal pillar recovery area, and then a waste rock filling machine is adopted to fill the waste rock to the coal pillar recovery area, and the waste rock is compacted and abutted.
Furthermore, the continuous waste rock transporting and filling system is characterized in that an upper belt conveyor and a lower belt conveyor are arranged in a stoping roadway reserved on the coal pillar side of the coal face, the upper belt conveyor is used for transporting waste rocks, the waste rocks are transported to a coal pillar recovery area, the lower belt conveyor is used for transporting coal, the coal recovered by the coal face and the coal pillar is transported out, the two belt conveyors are not interfered with each other in transporting, and the two belt conveyors can work cooperatively.
Furthermore, before filling the waste rock, the temporary supports are dismantled in sections, the sections are filled, after a section of roadway is filled with the waste rock filling machine, the waste rock filling machine needs to move backwards, when the waste rock filling machine moves, the tail of the belt conveyor for transporting the waste rock is firstly shortened by a certain distance, then the waste rock filling machine moves backwards, and the steps are circulated in sequence, so that the waste rock filling of each section is completed in sequence.
Still further, the temporary waste rock storage bin is built on one side of a roadway where the tunneling working face is located, the length and the width of the temporary waste rock storage bin are determined according to the designed temporary waste rock storage amount, and on the premise that normal production and safe passing are not affected, waste rocks are discharged from the roadway tunneling working face and can be temporarily accumulated in the temporary waste rock storage bin.
Furthermore, the coal pillar recovery process is carried out on a production team of the coal face so as to realize the common transportation of coal, and the gangue transportation and recovery area gangue filling process is carried out on an overhaul team of the coal face so as to avoid the mutual interference with the coal mining work of the coal face.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the coal pillar recovery and gangue filling integrated green mining method, gangue produced by the rock roadway driving face is filled into the goaf behind the recovered coal pillar, so that coal is replaced by gangue, the problem of coal resource waste caused by roadway protection of a large coal pillar is effectively solved, and the recovery rate of coal resources is obviously improved; the top plate above the recovered coal pillar is effectively supported by gangue filling, so that the stability of the top plate in a coal pillar recovery area is ensured, the influence of mining on an adjacent roadway on a working face is weakened, and the problem of strong dynamic pressure display caused by roadway protection of small coal pillars is solved; the tunneled and transported waste rock is filled into the coal pillar recovery area, so that the waste rock is not lifted, the waste rock transportation and lifting cost and the ground waste rock treatment cost are reduced, the problems of environmental pollution and ecological hazard caused by mine waste rock discharge are effectively solved, and the sustainable development of green coal resource exploitation is realized.
The invention provides an integrated green mining method for coal pillar recovery and waste rock filling, which solves the problems of resource waste of large coal pillar roadway protection, strong dynamic pressure display of small coal pillar roadway protection and environmental pollution of waste rock.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic structural diagram of the continuous recovery of the coal pillar recovery and gangue filling integrated green mining method of the invention;
FIG. 2 is a schematic structural diagram of the coal pillar recovery and gangue filling integrated green mining method in interval recovery;
FIG. 3 is a diagram of a coal pillar recovery and gangue filling production system of the integrated green mining method for coal pillar recovery and gangue filling of the present invention;
FIG. 4 is a schematic structural diagram of a top plate supporting section when a coal pillar recovery area of the coal pillar recovery and gangue filling integrated green mining method adopts a first structure;
fig. 5 is a schematic top view of a roof support structure when a first structure is adopted in a coal pillar recovery area of the coal pillar recovery and gangue filling integrated green mining method.
Description of reference numerals: 1-coal pillar, 2-stope face, 3-stope roadway, 4-protected stope roadway, 5-isolation coal pillar, 6-gangue, 7-support coal pillar, 8-coal pillar recovery area, 9-stope line, 10-coal pillar recovery equipment, 11-transfer conveyor, 12-belt conveyor for transporting coal, 13-single hydraulic prop, 14-hinged top beam, 15-belt conveyor for transporting gangue, and 16-gangue filling machine.
Detailed Description
As shown in fig. 1 to 5, the green mining method integrating pillar recovery and gangue filling of the present invention, in which the pillar 1 is a section pillar on one side of a mining roadway 3, includes the following steps:
before the coal pillar 1 is recovered, the requirements of mine pressure, ventilation, transportation, equipment size and production safety clearance are comprehensively considered, and reasonable coal pillar recovery and gangue filling processes and parameters are researched and determined, and the method mainly comprises the following steps: the recovery width of the coal pillar 1 is a meters, the recovery process and parameters of the coal pillar, the top plate support parameters of a coal pillar recovery area 8 and the gangue filling parameters of a gangue 6 transportation and recovery area;
step two, recovering the coal pillars 1: when the coal pillar 1 is recovered, the coal pillar 1 at one side of the stoping roadway 3 is recovered according to the designed recovery width a meter by adopting corresponding coal breaking and transporting machinery in advance of the stoping working face 2 by a certain distance, an isolation coal pillar 5 with the width d meter is reserved between the coal pillar 1 and the stoping roadway 4 to be protected, and the recovery of the coal pillar 1 with the corresponding cycle length b meter is completed, and the recovery process comprises the working procedures of coal breaking, coal charging and coal transporting; when the coal pillar 1 is recovered, two modes are adopted: the method comprises the following steps of continuously recycling the coal pillars 1 with the designed recycling width within a meter range; the second mode is that the coal pillars 1 in the sections are recycled at intervals, namely, when the coal pillars 1 are recycled, a certain distance of b meters is recycled, the coal pillars are filled with waste rocks 6, and a supporting coal pillar 7 with the length of c meters is reserved;
step three, supporting the top plate of the coal pillar recovery area 8: in the process of recovering the coal pillar 1, temporarily supporting the suspended top plate of the rear coal pillar recovery area 8 in time, ensuring the recovery safety and providing conditions for filling gangue; the regional roof support parameters need to be comprehensively determined according to surrounding rock stress, surrounding rock structure and mechanical parameters, coal pillar recovery region 8 space dimension parameters and the like; when the stability of the coal pillar 1 is poor in the recovery process of the coal pillar 1, the coal pillar 1 is recovered at intervals, and supporting and maintaining conditions of a top plate are improved by supporting the coal pillar 7;
step four, transporting waste rocks 6 and filling the waste rocks in the recovery area: after the coal pillar 1 is recycled for a certain distance of b meters, performing gangue filling on an area of the coal pillar 1 which is recycled for b meters: the method comprises the steps of transporting waste rocks 6 generated in the process of tunneling a coal mine underground tunnel or an underground chamber to a coal pillar recovery area 8 by a waste rock transport machine, then removing temporary supports in sections and filling the extracted space of the coal pillar recovery area 8 with waste rocks by using a waste rock filling system, ensuring that the extracted space is densely filled with the waste rocks and is connected with the upper and the top, fully utilizing the waste rocks 6 generated in the coal mine underground, and realizing green coal mining of replacing coal with the waste rocks without lifting the coal mine underground tunnel or the underground chamber;
and step five, after completing the coal pillar recovery and waste rock filling of one cycle length of b meters, continuing the coal pillar recovery and waste rock filling of the next cycle until the coal pillar recovery and waste rock filling are advanced to a coal mining stopping line 9 of the coal mining working face.
According to the coal pillar recovery and gangue filling integrated green mining method, the gangue produced by the rock roadway driving face is filled into the goaf behind the recovered coal pillar, so that the coal is replaced by the gangue, the problem of coal resource waste caused by roadway protection of a large coal pillar is effectively solved, and the recovery rate of coal resources is obviously improved; the top plate above the recovered coal pillar is effectively supported by gangue filling, so that the stability of the top plate in a coal pillar recovery area is ensured, the influence of mining on an adjacent roadway on a working face is weakened, and the problem of strong dynamic pressure display caused by roadway protection of small coal pillars is solved; the tunneled and transported waste rock is filled into the coal pillar recovery area, so that the waste rock is not lifted, the waste rock transportation and lifting cost and the ground waste rock treatment cost are reduced, the problems of environmental pollution and ecological hazard caused by mine waste rock discharge are effectively solved, and the sustainable development of green coal resource exploitation is realized.
Specifically, in the second step, firstly, the stope face 2 is advanced by a certain distance, an equipment channel with the width of a meter is excavated on the side of the coal pillar 1 at one side of the stope roadway 3, and the coal pillar recovery equipment 10 is installed to the equipment channel; then, the coal pillar recovery equipment 10 including a boom-type heading machine or a continuous mining machine is used for breaking and loading the recovered coal pillars 1, unloading the coal to the reversed loader 11, transferring the coal to a belt conveyor 12 for transporting the coal on the stope face 2 through the reversed loader 11, and transporting the coal out through the belt conveyor 12 for transporting the coal. When the coal pillar recovery width is small, breaking coal by using an air pick, and transferring the recovered coal to a belt conveyor 12 for conveying the coal on a recovery working face by using a small coal loader.
Moreover, the pillar recovery device 10 may adopt a tunnel repairing machine integrating the functions of breaking coal and charging coal, so as to recover and mine the pillar 1, and load the broken coal onto the belt conveyor 12 for transporting coal of the stope 2. The recovery procedure of the coal pillar 1 is selected to be carried out in the production shifts of the coal face so as to realize the common transportation of coal,
specifically, in the third step, in the recovery process of the coal pillar 1, the top plate support in the recovery area has three structures, the first structure is that a single hydraulic prop 13 is adopted to cooperate with a hinged top beam 14 to temporarily support the top plate, and the temporary support needs to follow the recovery working face of the coal pillar 1; the second structure is that an anchor rod, an anchor cable and a metal net are adopted for supporting; the third structure is that aiming at the interval type recovery coal pillar 1, the supporting coal pillar 7 and the recovery area temporary support are adopted to support the top plate, the support of the top plate can be enhanced through the supporting coal pillar 7, the recovery area temporary support strength can be reduced, and the recovery area temporary support process is simplified.
Specifically, the fourth step comprises two waste rock transportation and filling systems, wherein one system is a continuous waste rock transportation and filling system, waste rock 6 produced on the roadway driving working surface is transported to the coal pillar recovery area 8 by adopting 2-3 belt conveyors for transporting the waste rock 15, then the waste rock 6 is unloaded to the coal pillar recovery area 8 by a transfer conveyor 11 or a waste rock filling machine 16, and the waste rock 6 is compacted and connected to the roof by utilizing a waste rock filling machine 16; and the other method is to adopt an intermittent waste rock transportation and filling system, namely, a temporary waste rock storage bin is arranged in the middle link of the waste rock 6 transportation, a mine car is adopted to carry out discontinuous waste rock 6 transportation, the waste rock 6 is transported to a coal pillar recovery area 8, and then a waste rock filling machine 16 is adopted to fill the waste rock to the coal pillar recovery area 8, and the waste rock is compacted and connected with the roof in a pushing and compacting manner.
In the continuous waste rock transporting and filling system, an upper belt conveyor and a lower belt conveyor are arranged in a stoping roadway 3 reserved on the coal pillar side of a coal face, the upper belt conveyor 15 for transporting waste rocks is used for transporting waste rocks, waste rocks 6 are transported to a coal pillar recovery area 8, the lower belt conveyor 12 for transporting coal is used for transporting coal, the coal recovered from the coal face and the coal pillar 1 is transported away, the transportation of the two belt conveyors is not interfered with each other, and the two belt conveyors can work in a coordinated mode. The working procedures of waste rock transportation and waste rock filling in the recovery area are selected to be carried out in the overhaul class of the coal face so as to avoid mutual interference with the coal face.
Specifically, before filling the waste rock, the temporary supports are removed in sections, the sections are filled, the waste rock filling machine 16 moves backwards after filling a section of roadway, when the waste rock filling machine moves, the tail of the belt conveyor 15 for transporting the waste rock is firstly shortened by a certain distance, then the waste rock filling machine 16 moves backwards, and the circulation is performed in sequence, so that the waste rock filling of each section is completed in sequence.
Specifically, the temporary waste rock storage bin is built on one side of a roadway where the tunneling working face is located, the length and the width of the temporary waste rock storage bin are determined according to the designed temporary waste rock storage amount, and on the premise that normal production and safe passing are not influenced, waste rocks 6 are discharged from the roadway tunneling working face and can be temporarily accumulated in the temporary waste rock storage bin.
According to the coal pillar recovery and gangue filling integrated green mining method, coal pillar recovery and gangue filling are organically combined, so that coal is replaced by gangue, the extraction rate of coal resources is improved, an adjacent roadway is protected by gangue filling, the gangue does not rise, the problem of resource waste of large coal pillar roadway protection, the problem of strong dynamic pressure display of small coal pillar roadway protection and the problem of environmental pollution of waste gangue are solved.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (7)
1. The coal pillar recovery and gangue filling integrated green mining method is characterized in that the coal pillar is a section coal pillar on one side of a stoping roadway, and the method comprises the following steps:
the method comprises the following steps of firstly, before coal pillar recovery, researching and determining reasonable coal pillar recovery and gangue filling processes and parameters based on mine pressure, ventilation, transportation, equipment and other production technical conditions, and mainly comprising the following steps of: coal pillar recovery, roof support of a coal pillar recovery area, gangue transportation and gangue filling of a recovery area;
step two, coal pillar recovery: when the coal pillars are recovered, the coal pillars are advanced to the recovery working face for a distance, corresponding coal breaking and transporting machinery is adopted to recover the coal pillars on one side of the recovery roadway according to the designed recovery width a meters, an isolation coal pillar is reserved between the coal pillars and the protected recovery roadway, and the recovery of the coal pillars with the corresponding cycle length b meters is completed, wherein the recovery process comprises the working procedures of coal breaking, coal loading and coal transporting; when the coal pillar is recovered, two modes are adopted: the method comprises the following steps of continuously recycling the coal pillars within a designed recycling width range; the coal pillar is recycled at intervals, namely, when the coal pillar is recycled, a supporting coal pillar with the length of c meters is reserved every time a certain distance of b meters is recycled;
step three, supporting a top plate in a coal pillar recovery area: in the coal pillar recovery process, temporary support is timely carried out on a suspended top plate in a rear recovery area, the recovery safety is guaranteed, and meanwhile conditions are provided for gangue filling; the regional roof support parameters need to be comprehensively determined according to surrounding rock stress, surrounding rock structure and mechanical parameters and coal pillar recovery region space size parameters;
step four, gangue transportation and gangue filling in a recovery area: after the coal pillar is recycled for a certain distance of b meters, performing gangue filling on an area with the coal pillar recycling length of b meters: the method comprises the steps that waste rocks generated in the process of tunneling a tunnel or an underground chamber of a coal mine are transported to a coal pillar recovery area by a waste rock transport machine, then temporary supports are removed in sections, waste rock filling is carried out on a mining space of the coal pillar recovery area by a waste rock filling system, the mining space is guaranteed to be densely filled with the waste rocks and connected with the sides and the top, the waste rocks generated in the coal mine are fully utilized, and green coal mining with the waste rocks replaced by coal without lifting a well is realized;
step five, after completing the coal pillar recovery and waste rock filling of a cycle length of b meters, continuing the coal pillar recovery and waste rock filling of the next cycle until the coal pillar recovery and waste rock filling are advanced to a coal mining stopping line of a coal mining working face;
in the third step, in the coal pillar recovery process, the top plate support of the recovery area has three structures, the first structure adopts a single hydraulic prop to match with a hinged top beam to temporarily support the top plate, and the temporary support needs to follow the coal pillar recovery working face; the second structure is that an anchor rod, an anchor cable and a metal net are adopted for supporting; the third structure is that the supporting coal pillars and the temporary supporting roof of the recovery area are adopted for the interval type recovery coal pillars, and the supporting coal pillars can not only strengthen the supporting of the roof, but also reduce the temporary supporting strength of the recovery area and simplify the temporary supporting process of the recovery area;
in the third step, when the coal pillar stability is poor in the coal pillar recovery process, the coal pillars are recovered in an interval mode, and supporting and maintaining conditions of the top plate are improved through the supporting coal pillars;
the coal pillar recovery process is carried out on a production team of the coal face to realize the common transportation of coal, and the gangue transportation and recovery area gangue filling process is carried out on an overhaul team of the coal face to avoid the mutual interference with the coal face.
2. The integrated green mining method for coal pillar recovery and gangue filling as claimed in claim 1, wherein in the second step, firstly, a device channel with a width of a meter is dug on the coal pillar side of one side of the recovery roadway by a distance ahead of the recovery working face, and the coal pillar recovery device is installed to the device channel; and then, coal breaking and loading of the recovered coal pillars are realized by utilizing coal pillar recovery equipment, the coal is unloaded onto a reversed loader, the coal is transferred onto a belt conveyor of a stope face through the reversed loader, and the coal is transported out by utilizing the belt conveyor.
3. The integrated green mining method for coal pillar recovery and gangue filling as claimed in claim 2, wherein the coal pillar recovery equipment adopts a roadway repairing machine integrating functions of coal breaking and coal loading to realize the recovery and mining of the coal pillar, and the broken coal is loaded on a belt conveyor of a recovery working face.
4. The integrated green mining method for coal pillar recovery and gangue filling according to claim 1, wherein the four steps comprise two gangue transportation and filling systems, one is to adopt a continuous gangue transportation and filling system, the gangue produced by the roadway driving face is transported to a coal pillar recovery area by a belt conveyor, then the gangue is unloaded to the coal pillar recovery area by a transfer conveyor or a gangue filling machine, and the gangue is compacted and jacked by the gangue filling machine; the other method is to adopt an intermittent waste rock transportation and filling system, namely, a temporary waste rock storage bin is arranged in the middle link of waste rock transportation, a mine car is adopted to carry out discontinuous waste rock transportation, the waste rock is transported to a coal pillar recovery area, and then a waste rock filling machine is adopted to fill the waste rock to the coal pillar recovery area, and the waste rock is compacted and abutted.
5. The integrated green mining method for coal pillar recovery and gangue filling according to claim 4, wherein the continuous gangue transportation and filling system is characterized in that an upper belt conveyor and a lower belt conveyor are arranged in a recovery roadway reserved on the coal pillar side of the coal face, the upper belt conveyor is used for transporting gangue and transporting gangue to a coal pillar recovery area, the lower belt conveyor is used for transporting coal and transporting coal recovered from the coal face and the coal pillar, and the transportation of the two belt conveyors is not interfered with each other and can work cooperatively.
6. The integrated green mining method for coal pillar recovery and gangue filling as claimed in claim 4, wherein before gangue filling, temporary supports are removed in sections, and section filling is performed, and after a section of roadway is filled by a gangue filling machine, the gangue filling machine needs to move backwards, and when the gangue filling machine moves backwards, the tail of the belt conveyor for transporting gangue is firstly shortened by a certain distance, and then the gangue filling machine moves backwards, and the circulation is sequentially performed, so that gangue filling of each section is sequentially completed.
7. The integrated green mining method for coal pillar recovery and gangue filling according to claim 4, wherein the temporary gangue storage bin is built on one side of a roadway where a driving face is located, the length and the width of the temporary gangue storage bin are determined according to the designed temporary gangue storage amount, and gangue is discharged from the driving face of the roadway and can be temporarily accumulated in the temporary gangue storage bin on the premise of not influencing normal production and safe traffic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111078040.4A CN113738438B (en) | 2021-09-15 | 2021-09-15 | Integrated green mining method for coal pillar recovery and gangue filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111078040.4A CN113738438B (en) | 2021-09-15 | 2021-09-15 | Integrated green mining method for coal pillar recovery and gangue filling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113738438A CN113738438A (en) | 2021-12-03 |
| CN113738438B true CN113738438B (en) | 2023-04-07 |
Family
ID=78738872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111078040.4A Active CN113738438B (en) | 2021-09-15 | 2021-09-15 | Integrated green mining method for coal pillar recovery and gangue filling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738438B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU819343A1 (en) * | 1979-05-22 | 1981-04-07 | Научно-Исследовательский Горно- Рудный Институт | Ore body mining method |
| CN1963149B (en) * | 2006-11-17 | 2011-09-14 | 中国矿业大学 | Mining method for replacement of banded coal under building by waste rock |
| CN101725352B (en) * | 2009-12-04 | 2012-03-07 | 中国矿业大学 | Method for filling solid and fully mechanizing and recovering room type coal pillar |
| CN101824985B (en) * | 2010-03-25 | 2012-08-01 | 巩庆刚 | Non-coal pillar mining method of protective coal pillars in coal mine |
| CN101881167B (en) * | 2010-06-04 | 2012-01-11 | 山东华恒矿业有限公司 | Coal face stump mining method |
| CN109236363A (en) * | 2018-11-28 | 2019-01-18 | 中国矿业大学 | A kind of shortwall block formula filling coal mining method |
-
2021
- 2021-09-15 CN CN202111078040.4A patent/CN113738438B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113738438A (en) | 2021-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1963149B (en) | Mining method for replacement of banded coal under building by waste rock | |
| CN103742148B (en) | The soft coal-mining method covering the descending waste filling of supporting of a kind of half-edge coal seam | |
| CN110424966B (en) | Ultrahigh water material filling working face gangue pumping entry retaining non-coal pillar mining method | |
| CN103939102B (en) | A kind of solid filling reclaims opencut side eventually and presses down the coal-mining method of coal | |
| CN103527196B (en) | Method for recovery of room-type coal pillar through loess filling | |
| CN105298496B (en) | Complete adopt of reserved working face coal column is set to fill coal-mining method entirely | |
| CN102996131A (en) | Solid-filling coal mining method with two pre-excavating tunnels for advancing | |
| CN104405437A (en) | Mining method employing solid filling and fully-mechanized coal mining hybrid working face | |
| CN103470261A (en) | Method for roadway driving along goaf under original roadway top plate of fully mechanized top coal caving goaf | |
| CN109882239B (en) | Open-pit end slope coal-pressing radial filling mining method | |
| CN109736806A (en) | A kind of no pre-tunnel laneway road protrusive building block filling coal mining method | |
| CN109630112B (en) | N00 mining method of cut top filling | |
| CN102877848B (en) | Method for performing coal mining and gangue cementation stripe filling simultaneously | |
| CN107905807A (en) | A kind of future small coal pillar comprehensive mechanical coal mining supporting construction and construction method | |
| CN110410076A (en) | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf | |
| CN113153295A (en) | Mining method for extremely thick hard coal | |
| CN1782326B (en) | Method for treating waste rock in coal mine | |
| CN108331580B (en) | Clean and efficient coal mining method | |
| CN108952725B (en) | Low dilution mining method suitable for gentle dip thin ore body | |
| CN105971607A (en) | Method for gob-side entry retaining of medium-thickness coal seam | |
| CN111364994B (en) | Fully-mechanized mining-to-filling continuous propulsion collaborative mining method | |
| CN113738438B (en) | Integrated green mining method for coal pillar recovery and gangue filling | |
| CN110714759B (en) | Method for mining lost coal | |
| CN109973094B (en) | Mine resource same-face full-mining local-filling mining method | |
| CN107091112B (en) | A kind of Fast Filling method suitable for lossless mining |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |