Method for combined development of bed series

FIELD: mining.

SUBSTANCE: method includes exposure and development of reserves by open-cut method, exposure, preparation and working-out the reserves in cut edges by underground method, transportation of rock mass and maintaining protective pillars. When eliminating the front of open mining at safety distance there performed is an exposure of underground mining unit in cut edge that includes several beds. There passed are ventilation and pulp-haulage drift ways that are cut by pulp-haulage roadway, and from the surface there drilled are wells along coal beds till pulp-haulage roadway. Broken working is done from well upwards and downwards by hydraulic or drill-hydraulic methods, and pulp transportation is done by wells and pulp-transportation mines till draining complex.

EFFECT: invention allows increasing the coefficient of mineral resources extraction and reducing environmental losses.

6 cl, 2 dwg

 

The invention relates to the mining industry and can be used in the development of bedded deposits.

There is a method of hydraulic borehole mining of solid minerals from the inclined layers [1], including excavation unit placed on the ledge career and oriented in the direction of the layer mineral (PI). On the border of the block into deep parts of the reservoir drilling a well for the issuance of PI before entering it into the soil layer, after which the hole grow from the mouth to the roof of the reservoir.

In the formation of the mineral produce a jet for the formation of an inlet chamber, a well equipped pulp-raising equipment. In the Board's career through the formation of the Buryat one or more production wells until breakthrough of their reception by the camera issue well, and the angle of inclination of wells equal to the angle of incidence of the reservoir. Production wells will be equipped with giant shell side nozzles. Getrootpane PI produced in the process of moving giant shell in the production well for the uprising of the reservoir. The resulting pulp enters the receiving chamber of the dispensing hole, and from it using pulp-raising equipment is given to the surface.

The disadvantage of this method is the limited conditions of use.

The known method buergerliches development thin the average power layers [2], including mines and sewage extraction of rock buergerliches way with hydrotransport slurry, characterized in that in order to ensure ventilation at the expense of mine depression, additional water for flushing the rock mass, unloading rock mass and maintain the specified direction of the treatment wells, excavation of minerals produced in three stages: at the first buergerliches way carried out ahead of a parallel vent wells along the strike of the column with a diameter of 100-200 mm with step length equal to the sum of the radius of the extender well and pillar width, ensuring integrity of the well at the time of sewage extraction, on the second notch of the rock mass are due to the extension of the well at full capacity of the reservoir, this water serves to vent production, as in the well wound high-pressure hose with a nozzle attached to the rod by which the third stage is performed during reverse motion of the rod repayment pillar hydraulic method at a pressure of 5-6 MPa, and erosion of the rock mass is preserved through the hole.

The disadvantage of this method is the complexity of technology.

The closest technical solution adopted for the prototype is the way to develop an inclined layer of solid mineral IU the Odom hydraulic borehole mining [3]. The method includes excavation unit placed on the ledge career and focused on dip mineral (PI). On the border of the block in the deep parts of the reservoir Buryats issued well before entering it into the soil layer, after which the hole grow from the mouth to the roof of the reservoir. In the formation of PI to produce a jet for the formation of the reception chamber, and then the well was equipped with a pulp-raising equipment. A necessary condition for the implementation of the method is the construction along the above-mentioned boundary extraction unit to the breakthrough with a receiving cell vydatnou wells transportation tunnel with a gradient from 4%to 8%. Transport development pulp goes from the peripheral part of the layer PI in the receiving chamber, and from it using pulp-raising equipment is issued on the surface. In the Board's career in the seam PI drilling the number of parallel production wells that are hydraulically connected with transport development. Production wells will be equipped with giant projectile. Getrootpane PI produced in the process of moving giant projectile in production wells from traffic generation to Board career. Based on the way the sinking of the transport development of the invention can be implemented in 2 ways: transport and production are by jet formation PI of auxiliary wells, p is oboronnyh on the boundary of the excavation unit, and transport production form by jet formation PEE in critical areas of the production wells.

The disadvantage of this method is the limited conditions of use.

The objective of the invention is to improve the extraction of mineral resources, technology simplification and reduction of environmental damage.

The solution of this problem is achieved by the fact that removing the front surface mining at a safe distance produce the opening of the block underground mining in the Board section comprising several layers, ventilation and pulponasosnoj galleries who go astray purpureipennis the roadway, and from the surface drilling of wells for coal to pulpiteering drift, sewage treatment works are from the well up and down hydraulic or buergerliches ways, and transportation of pulp perform well and purpureipennis to the complex workings of dehydration.

Between the treatment chambers (benches) lay the coal pillars to ensure sustainability at the stage of joint management of surface and underground works.

Well connected to the network degassing pipeline, which is accumulated methane-air mixture at the degassing reservoir and carrying out cleaning work.

Complex dewatering of the pulp is placed in the trench section Il is in the underground dewatering chamber depending on the climatic conditions of mining operations.

After the cleaning work, the developed space used for placement of overburden section by filing through the hole.

When the depth of the open development of more than 100 m may divide a block of underground mining operations at several tiers.

The invention is illustrated by drawings, where figure 1 gives the schematic of Stripping and development of a coal Deposit; figure 2 - cross section along the layer.

At the initial stage of the field development is carried out in an open way from trench 1, held by the most powerful layer 2 in the retinue, when removing the front surface mining at a safe distance produce underground hiding layers 3, 4 in the Board trench 5 ventilation adit 6 and pulponasosnoj galleries 7 who go astray purpureipennis the passage 8, when the depth of the open development of more than 100 m may divide a block of underground mining operations at several layers 9, 10.

Surface drilling of wells 11 coal seams 3, 4 to pulpiteering drift 8 sewage treatment works are in the chambers 12 of the bore 11 from the top down hydraulic or bottom-up buergerliches ways, and transportation of pulp is performed in the wells 11, pulmotension the roadway 8 and pulponasosnoj the adit 7 to complex dehydration 13 placed in the trench 1 or underground dewatering chamber 14 depending on the climatic conditions of mining operations.

Between the treatment chambers lay of the coal pillars 15 to ensure sustainability on the stages of conducting surface and underground work, and after excavation of coal in the treatment chambers are placed overburden section 16.

In advance and in the conduct of treatment works well 11 is connected to the network degasification gas line 17 leading to a vacuum pump 18, in which is accumulated methane-air mixture.

Applied technical solutions allow to increase the coefficient of extraction of mineral resources and to reduce environmental damage to the environment.

SOURCES of INFORMATION

1. RF patent №2235882, MKI E21C 45/00. Way of a hydraulic borehole mining of solid minerals from the inclined strata. / Viewnew, Vmigo, Daendels and other Publ. 10.09.2004.

2. RF patent №2170821. The way buergerliches the development of thin and medium-capacity reservoirs. IPC E21C 41/18. Patentable. authors: Kondratov IV, Fomichev YEAR, Senkus VV, Senkus Shaft. C. Appl. 15.12.1999. Publ. 20.07.2001. Bull. No. 20.

3. RF patent №2235881. How to develop an inclined layer of solid mineral method of hydraulic borehole mining. MCI E21C 45/00. / Viewnew, Vmigo, Daendels and other Publ. 10.09.2004.

1. The method of combined development suites layers, including the opening and development of reserves in an open way, Stripping, preparation and mining Zap the owls in the sides of the incision underground, transportation of rock mass and leaving the security pillar, wherein when removing the front surface mining at a safe distance produce the opening of the block underground mining in the Board section comprising several layers, ventilation and pulponasosnoj galleries who go astray purpureipennis the roadway, and from the surface drilling of wells for coal to pulpiteering drift, sewage treatment works are from the well up and down hydraulic or buergerliches ways, and transportation of the pulp perform well and purpureipennis to the complex workings of dehydration.

2. The method according to claim 1, characterized in that between the treatment chambers-benches lay of the coal pillars, to ensure sustainability at the stage of joint management of surface and underground works.

3. The method according to claim 1, characterized in that the wells connected to the network degassing pipeline, which is accumulated methane-air mixture at the degassing reservoir and carrying out cleaning work.

4. The method according to claim 1, characterized in that the complex dewatering of the pulp is placed in a trench cut or underground dewatering chamber depending on the climatic conditions of mining operations.

5. The method according to claim 1, characterized in that after the treatment works produced about transto used for overburden section by filing through the hole.

6. The method according to claim 1, characterized in that the depth of surface mining of more than 100 m may divide a block of underground mining operations at several tiers.



 

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EFFECT: significantly reduced environmental loading and increased safety of mining operations.

3 cl, 1 dwg

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