CN104405396A - Mining method for passing open-pit coal mine of coal barren area through leaving island to build bridges - Google Patents
Mining method for passing open-pit coal mine of coal barren area through leaving island to build bridges Download PDFInfo
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- CN104405396A CN104405396A CN201410730553.2A CN201410730553A CN104405396A CN 104405396 A CN104405396 A CN 104405396A CN 201410730553 A CN201410730553 A CN 201410730553A CN 104405396 A CN104405396 A CN 104405396A
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- 239000003245 coal Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000004904 shortening Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/28—Methods of surface mining; Layouts therefor for brown or hard coal
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention belongs to the field of coal mining, and particularly relates to a mining method for passing an open-pit coal mine of a coal barren area through leaving an island to build bridges. The mining method comprises the following steps: when an open pit is advanced to the coal barren area, determining the range of an island body according to the range of the coal barren area, establishing an island-back transportation conveyer bridge between the island body of the pit and an inner dump, and building an island-front conveyer bridge when the inner dump crosses the island body of the pit. The mining method has the advantages of decreasing the overburden amount in the ore field, reducing the production stripping ratio, saving the land occupation of an outer dump, being environment-friendly, decreasing the mining disturbance of the pit, shortening the truck load distance, reducing the stripping and transportation costs, increasing the economic benefit and having wide practicability.
Description
Technical field
The invention belongs to coal mining field, the open coal mine being specifically related to a kind of Guo Wumei district stays island bridging exploitation method.
Background technology
Open pit boundary is the space profiles that open pit quarry exploitation is at the end formed, and during when occurring karst collapse col umn in open-pit limit, without complex geological structures such as coal districts, can cause that coal seam is discontinuous, local can not be adopted, therefore need invalid overburden amount during exploitation reducig.
Under the prerequisite not changing mining sequence, the method of Traditional control stripping-to-ore ratio is adjustment perforation, explosion, operational parameter when adopting dress and transport and arrange rock, invalid overburden amount is shared each different mining period by the method, does not truly reduce invalid overburden amount.And use the discontinuous min ing technology of monobucket-truck carry out in when raftinging defeated, usually to adopt in monocycle row's mode in row or dicyclo, because Automobile Transportation distance is large, cost of transportation is high, have impact on strip mining transformation economic benefit greatly.
Summary of the invention
For prior art Problems existing, the open coal mine that the invention provides a kind of Guo Wumei district stays island bridging exploitation method, and object is invalid overburden amount in minimizing field, colliery, reduces truck haul distance and reduce cost of transportation.
The technical scheme realizing the object of the invention is carried out according to following steps:
(1) in process of coal mining, when the working pit edge of open coal mine stope is advanced into without coal district, without coal, working pit edge is divided into two parts by district, working pit edge reserves island body space, using border, seat earth isohypse Zhong Wumei district as the bottom boundary staying island body in the bridging of island, shoulder height and the working pit edge shoulder height of island body are consistent, and island body haulage berm width meets truck two-way traffic conveyor width, and the final side slope angle of island body calculates according to the mechanics index of physics of ore deposit, mine rock to be determined;
(2) then promotion Bang Zhiwumei district is continued, the isolated stope island body determined in forming step (1), transport-and-dumping bridge overlap island between stope island body and internal dumping after;
(3) along with working pit edge crosses over stope island body gradually, internal dumping follows up forward, behind island, transport-and-dumping bridge shortens gradually, the delayed stripping of working pit edge active line part, and transport-and-dumping bridge before forming island, now stope is divided into two regions by transport-and-dumping bridge before island, and interior row's means of transportation of stope becomes row's means of transportation in the dicyclo of two-region;
(4) final working pit edge and internal dumping continue development by without coal district, when next step bench toe and the isolated island of Waste Dump inside Open Pit Mine are parallel along the bench toe in working pit edge direction, transport-and-dumping bridge before island is removed, then continues to exploit to working pit edge direction of propulsion.
Wherein, behind described island, transport-and-dumping bridge is consistent with the longitudinal width without coal district with the base widths of transport-and-dumping bridge before island, number of steps≤3, and its bridge deck width meets the conveyor width of dump truck when casting is transported.
Before described island, the dismounting mode of transport-and-dumping bridge is that protrusive tears bridge open or retrusive tears bridge open.
A special case is also comprised in the present invention, Ji Dangwumei district helps near a side, the production stripping ratio of island body near end side side is greater than economic stripping ratio, then adopt that coal is pressed in local, the mode dodged without coal district exploits, namely peninsula recovery scheme is stayed, when stope working pit edge is advanced into half island boundaries, local pressure coal can by the extraction of high wall mining machine; For satisfied transport, casting requirement, island body and end can adopt open cutting ditch mining type between helping, and no longer need to put up a bridge.
Compared with prior art, feature of the present invention and beneficial effect are:
(1) stope stays island, decreases invalid overburden amount in boundary, reduces production stripping ratio, reduces and adopts stripping expense;
(2) stope stays island, can save a large amount of outer dump and take up an area; After stope stays the follow-up of island internal dumping, can internal dumping be realized and isolated island is reclaimed fast, little to surface mine environmental disturbances;
(3) transport-and-dumping bridge between reasonable Arrangement internal dumping and island body, effectively can fall and shorten from thing haul distance, saves cost of transportation;
(4) because transport-and-dumping bridge is based upon without after coal district, coal is not pressed.Therefore, there is not the problem that secondary is peeled off in transport-and-dumping bridge in life cycle.
Open coal mine of the present invention adopts center to stay island exploitation method, reduce invalid overburden amount in open pit boundary, decrease stope exploitation disturbance, expropriation of land is arranged outside reducing, overlap transport-and-dumping bridge between center isolated island and internal dumping effectively to shorten distance of stripping transport and reduce running cost, improve mine economic profit.
Accompanying drawing explanation
Fig. 1 is that the open coal mine in Guo Wumei district of the present invention stays island bridging exploitation general structure schematic diagram;
Wherein: 1: working pit edge; 2: transport-and-dumping bridge before island; 3: stope island body; 4: transport-and-dumping bridge behind island; 5: internal dumping; 6: end side; Dotted portion represents without coal district scope;
The cross-sectional drawing of transport-and-dumping bridge behind transport-and-dumping bridge and island before Tu2Shi Tu1Zhong island;
Wherein: B
n: the width of transport-and-dumping bridge substrate; B
2: transport-and-dumping bridge second level step width; B
1: transport-and-dumping bridge first order step width; B
0: transport-and-dumping bridge bridge deck width; H: transport-and-dumping bridge shoulder height; D: transport-and-dumping bridge step square position width; α: transport-and-dumping bridge bank slope;
Fig. 3 is the development process schematic forming transport-and-dumping bridge behind stope Dao Tiyu island in the embodiment of the present invention;
Its order is: (a) → (b) → (c) → (d);
Fig. 4 is transport-and-dumping bridge and the development process schematic tearing bridge open before forming island in the embodiment of the present invention;
Its order is: (e) → (f) → (g) → (h);
Fig. 5 tears bridge mode schematic diagram open in the embodiment of the present invention;
Wherein: (i) for protrusive tears bridge open; J () tears bridge open for retrusive.
Detailed description of the invention
Below in conjunction with accompanying drawing, enforcement of the present invention is further described.
Embodiment 1
Without coal district, working pit edge is divided into left and right two parts when excavating plant, the production stripping ratio of both sides, Qie Wumei district is all not more than economic stripping ratio, adopts the open coal mine in Guo Wumei district of the present invention to stay island bridging exploitation method, Ji Quanliu island recovery scheme, as shown in Figure 1, carry out according to following steps:
(1) in process of coal mining, when the working pit edge of open coal mine stope is advanced into without coal district, working pit edge reserves island body space, as shown in Fig. 3 (a), using border, seat earth isohypse Zhong Wumei district as the bottom boundary staying island body in the bridging of island, shoulder height and the working pit edge shoulder height of island body are consistent, and island body haulage berm width meets truck two-way traffic conveyor width, and the final side slope angle of island body calculates according to the mechanics index of physics of ore deposit, mine rock to be determined;
In the present embodiment, island body and working pit edge respective transfer square position overlap, island body shoulder height is consistent with working pit edge shoulder height, get 15m, island body haulage berm width demand fulfillment truck two-way traffic conveyor width, generally≤30m, island body finally helps the mechanics index of physics of ore deposit, slope angle mine rock to calculate, and determines that the final side slope angle in Simen, Inner Mongolia area is 23 °;
(2) then border, promotion Bang Zhiwumei district is continued, the isolated stope island body determined in forming step (1), transport-and-dumping bridge overlap island between stope island body and internal dumping after, the width B of transport-and-dumping bridge substrate behind island
nconsistent with the longitudinal width without coal district, to build behind island in conveyor bridge process, first next step of conveyor bridge is built, now, bank slope α is the natural repose angle 33 ° of loose media, conveyor bridge shoulder height H is generally working pit edge two standard shoulder height sums, after the most next step of conveyor bridge constructs, overlaps with working pit edge, stope island body, internal dumping; Carry out building of conveyor bridge second step subsequently; Conveyor bridge goes up bridge deck width B most
0need>=30m, meet truck two-way traffic movement requirement, according to without coal sector width, conveyor bridge number of steps generally should more than 3, highly should more than 90m, conveyor bridge cross section as shown in Figure 2, dump truck conveyor width d during conveyor bridge left and right sides bridge deck width demand fulfillment casting transport, generally get 30m, behind the island that overlap joint is set up, transport-and-dumping bridge as shown in Figure 3 (b);
(3) along with working pit edge crosses over stope island body gradually, internal dumping is pushed ahead, and behind island, transport-and-dumping bridge shortens gradually, and internal dumping crosses over stope island body gradually, as shown in Fig. 3 (c) (d);
When crossing over stope island body in open coal mine stope progradation gradually, the delayed stripping of working pit edge active line part, form transport-and-dumping bridge before island, stope is divided into two parts by conveyor bridge before island, in stope, row's means of transportation becomes row's mode in the dicyclo of two-region, as shown in Fig. 4 (e), along with the follow-up of internal dumping, behind island, transport-and-dumping bridge lost efficacy gradually, as shown in Fig. 4 (f), before island, transport-and-dumping bridge parameter is consistent with transport-and-dumping bridge parameter behind island, along with stope working pit edge develops to direction of propulsion, before island, conveyor bridge is formed gradually, as shown in Fig. 4 (g);
(4) Wu Meiqu is crossed in final working pit edge and internal dumping continuation development, when next step bench toe and the isolated island of Waste Dump inside Open Pit Mine are parallel along the bench toe in working pit edge direction, transport-and-dumping bridge before island is removed, stope to revert in single district dicyclo row's mode as shown in Fig. 4 (h), dismounting mode is that protrusive tears bridge open or retrusive tears bridge open, as Fig. 5 (i) and 5(j) shown in, namely can carry out tearing bridge open from body side, nearly stope island or away from body side, stope island, then conveniently mining type continues to exploit to working pit edge direction of propulsion.
Claims (3)
1. the open coal mine in a Zhong Guowumei district stays island bridging exploitation method, it is characterized in that carrying out according to following steps:
(1) in process of coal mining, when the working pit edge of open coal mine stope is advanced into without coal district, without coal, working pit edge is divided into two parts by district, working pit edge reserves island body space, using border, seat earth isohypse Zhong Wumei district as the bottom boundary staying island body in the bridging of island, shoulder height and the working pit edge shoulder height of island body are consistent, and island body haulage berm width meets truck two-way traffic conveyor width, and the final side slope angle of island body calculates according to the mechanics index of physics of ore deposit, mine rock to be determined;
(2) then promotion Bang Zhiwumei district is continued, the isolated stope island body determined in forming step (1), transport-and-dumping bridge overlap island between stope island body and internal dumping after;
(3) along with working pit edge crosses over stope island body gradually, internal dumping follows up forward, behind island, transport-and-dumping bridge shortens gradually, the delayed stripping of working pit edge active line part, and transport-and-dumping bridge before forming island, now stope is divided into two regions by transport-and-dumping bridge before island, and interior row's means of transportation of stope becomes row's means of transportation in the dicyclo of two-region;
(4) final working pit edge and internal dumping continue development by without coal district, when next step bench toe and the isolated island of Waste Dump inside Open Pit Mine are parallel along the bench toe in working pit edge direction, transport-and-dumping bridge before island is removed, then continues to exploit to working pit edge direction of propulsion.
2. the open coal mine in a kind of Guo Wumei district according to claim 1 stays island bridging exploitation method, after it is characterized in that described island, transport-and-dumping bridge is consistent with the longitudinal width without coal district with the base widths of transport-and-dumping bridge before island, number of steps≤3, its bridge deck width meets the conveyor width of dump truck when casting is transported.
3. the open coal mine in a kind of Guo Wumei district according to claim 1 stays island bridging exploitation method, and before it is characterized in that described island, the dismounting mode of transport-and-dumping bridge is that protrusive tears bridge open or retrusive tears bridge open.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806247A (en) * | 2015-04-28 | 2015-07-29 | 中国矿业大学 | Transport method of building longitudinal composite bridge in middle of strip mine stope |
| CN105888669A (en) * | 2016-04-14 | 2016-08-24 | 中煤科工集团武汉设计研究院有限公司 | Method for developing open pit without main access |
| CN108716402A (en) * | 2018-05-21 | 2018-10-30 | 中国矿业大学 | A kind of Semicontinuous Technology in Surface Coal Mines intermediate axle arrangement |
| CN109630121A (en) * | 2019-01-30 | 2019-04-16 | 新疆天池能源有限责任公司 | A kind of opencut exploiting field steering development haulage system |
| CN110331651A (en) * | 2019-07-24 | 2019-10-15 | 辽宁工程技术大学 | It is a kind of for connecting the automatic moving type bridge of overhead travelling crane of open-pit mine stope and internal dumping |
| CN110348645A (en) * | 2019-07-19 | 2019-10-18 | 辽宁工程技术大学 | One kind being based on the maximized open coal mine casting line method for arranging of interior row's space utilization |
| CN110984991A (en) * | 2019-12-12 | 2020-04-10 | 神华准格尔能源有限责任公司 | Method for moving intermediate bridge of open stope |
| CN111963176A (en) * | 2020-08-27 | 2020-11-20 | 中国矿业大学 | Open pit coal mine mining and discharging method beneficial to ventilation of stope in winter |
| CN112214867A (en) * | 2020-08-28 | 2021-01-12 | 辽宁工程技术大学 | Strip mine mining boundary and mining program collaborative optimization method under complex coal seam condition |
| CN112765804A (en) * | 2021-01-14 | 2021-05-07 | 辽宁工程技术大学 | Soft rock opencast coal mine inside and outside refuse dump parallel development step pitch determination method |
| CN112922601A (en) * | 2021-02-26 | 2021-06-08 | 辽宁工程技术大学 | Two-quantity reserving method for strip mine of inclined coal seam |
| CN113128044A (en) * | 2021-04-15 | 2021-07-16 | 辽宁工程技术大学 | Method for determining advancing mining step pitch of lateral mining working wall of soft rock opencast coal mine |
| CN113344328A (en) * | 2021-05-07 | 2021-09-03 | 北方魏家峁煤电有限责任公司 | Method and device for delimiting outer soil discharge field of opencast coal mine |
| CN113356852A (en) * | 2021-07-12 | 2021-09-07 | 辽宁工程技术大学 | Method for determining inner row bridging after open pit lower end slope steep wall mining |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806247A (en) * | 2015-04-28 | 2015-07-29 | 中国矿业大学 | Transport method of building longitudinal composite bridge in middle of strip mine stope |
| CN105888669A (en) * | 2016-04-14 | 2016-08-24 | 中煤科工集团武汉设计研究院有限公司 | Method for developing open pit without main access |
| CN108716402A (en) * | 2018-05-21 | 2018-10-30 | 中国矿业大学 | A kind of Semicontinuous Technology in Surface Coal Mines intermediate axle arrangement |
| CN109630121A (en) * | 2019-01-30 | 2019-04-16 | 新疆天池能源有限责任公司 | A kind of opencut exploiting field steering development haulage system |
| CN110348645A (en) * | 2019-07-19 | 2019-10-18 | 辽宁工程技术大学 | One kind being based on the maximized open coal mine casting line method for arranging of interior row's space utilization |
| CN110348645B (en) * | 2019-07-19 | 2022-01-28 | 辽宁工程技术大学 | Opencut coal mine dumping line arrangement method based on internal dumping space utilization maximization |
| CN110331651A (en) * | 2019-07-24 | 2019-10-15 | 辽宁工程技术大学 | It is a kind of for connecting the automatic moving type bridge of overhead travelling crane of open-pit mine stope and internal dumping |
| CN110984991B (en) * | 2019-12-12 | 2021-06-29 | 神华准格尔能源有限责任公司 | Method for moving intermediate bridge of open stope |
| CN110984991A (en) * | 2019-12-12 | 2020-04-10 | 神华准格尔能源有限责任公司 | Method for moving intermediate bridge of open stope |
| CN111963176A (en) * | 2020-08-27 | 2020-11-20 | 中国矿业大学 | Open pit coal mine mining and discharging method beneficial to ventilation of stope in winter |
| CN112214867A (en) * | 2020-08-28 | 2021-01-12 | 辽宁工程技术大学 | Strip mine mining boundary and mining program collaborative optimization method under complex coal seam condition |
| CN112214867B (en) * | 2020-08-28 | 2024-04-02 | 辽宁工程技术大学 | Collaborative optimization method for mining boundaries and mining procedures of strip mine under complex coal seam condition |
| CN112765804B (en) * | 2021-01-14 | 2021-11-02 | 辽宁工程技术大学 | Soft rock opencast coal mine inside and outside refuse dump parallel development step pitch determination method |
| CN112765804A (en) * | 2021-01-14 | 2021-05-07 | 辽宁工程技术大学 | Soft rock opencast coal mine inside and outside refuse dump parallel development step pitch determination method |
| CN112922601A (en) * | 2021-02-26 | 2021-06-08 | 辽宁工程技术大学 | Two-quantity reserving method for strip mine of inclined coal seam |
| CN113128044A (en) * | 2021-04-15 | 2021-07-16 | 辽宁工程技术大学 | Method for determining advancing mining step pitch of lateral mining working wall of soft rock opencast coal mine |
| CN113344328A (en) * | 2021-05-07 | 2021-09-03 | 北方魏家峁煤电有限责任公司 | Method and device for delimiting outer soil discharge field of opencast coal mine |
| CN113356852A (en) * | 2021-07-12 | 2021-09-07 | 辽宁工程技术大学 | Method for determining inner row bridging after open pit lower end slope steep wall mining |
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Application publication date: 20150311 |