Method to change over cutter-loader to new mining strip in long complex-mechanised mining faces (versions)

FIELD: mining.

SUBSTANCE: method to change over cutter-loader with auger actuators to new mining strip with location of face conveyor drive in longwall face and single-sided pattern of extraction, includes movement of cutter-loader with mineral extraction from cutting zone. At the same time at the end section of longwall face, at the distance equal to the distance between axes of cutter-loader augers, two wells are drilled, to the depth equal to one width of cutter-loader grip. Then cutter-loader moves as idle-running to the end of longwall face, afterwards cutter-loader augers are installed along axis of wells, where at frontal feed of cutter-loader, auger hubs enter wells, and auger blades destroy massif and produce mineral to conveyor with subsequent movement of cutter-loader and formation of new mining strip. In another version of method, cutter-loader changeover is proposed with shuttle method of extraction.

EFFECT: higher efficiency of mining faces operation, simplified technology of second working, reduced costs for equipment, less time spent for auxiliary operations, increased resource of conveyor operation, elimination of multiple bends in conveyor stand.

2 cl, 3 dwg

 

The invention relates to the mining industry and is designed to carry out niches in long complex-mechanized Stopes for translation of the Shearer on new excavation lane.

1. The known method of transfer auger of the combine on a new excavation band in full-mechanized Stopes by Samothraki (RF patent 2283955). The method includes the preparation of the harvester and shields, stretch combine in the middle part of the stope, the shifting of part of part of the AFC, the return of the combine, the shifting of the support units and the fastening of the roof above the harvester. The harvester is transferred to the end position, in which the first Executive body comes to mating with clearing face the roadway. Preparation combine carry out the destruction of the second of the Executive body on the opposite side of the roadway or its transfer into the transport position. The first Executive body is installed in the lower position. Shifting of the rod AFC carry out the entire length of the stope - front. Driving the combine in the middle part of the stope is performed with the destruction of the lower unit of the array and the formation of undercut on the length not less than the length of the harvester and loading the broken coal on the conveyor. After returning combine the second Executive body set in place and is and is transferred into the working position.

The disadvantages of the method are the complexity, the difficulty of mounting and Dismounting of the auger of the combine and a great time to perform these operations.

2. The known method of transfer auger of the combine on a new excavation band in full-mechanized Stopes by Samothraki (RF patent 93036740). The method includes the breaking of mineral harvester frame with a movable conveyor, the movement of the conveyor to the bottom of the reservoir jacks shifting sections of powered roof supports, the machine travels along the conveyor and the wedge-shaped recess along the length of the lava in the horizontal plane of the cross section of the strips of the reservoir at the end of the lava. In the process of Samothraki are one notch shortened to the bottom and facing toward the end of the lava wedge-shaped strip of the reservoir by movement of the harvester through the pipeline to the center of the lava at its end area, the movement of the conveyor and its drive to the bottom of the reservoir at the end of the lava movement of the harvester through the pipeline in the area of the valve to the end of the lava and front movement of the conveyor to the bottom of the reservoir behind the harvester along the entire length of lava.

The disadvantages of the method are the significant time spent on the translation of the harvester on a new excavation band because of the limited speed of the Shearer mining the wedge-shaped strip and a large section length of Samothraki, Sogn the th site of the AFC, reduce the resource of his work.

3. The known method of transfer auger of the combine on a new excavation band in full-mechanized Stopes conducting niche hammer breaking. The method consists in the following: at the end of the longwall working manual jackhammer coal destroys the array, forming a so-called niche, repulsed minerals manually with shovels offloaded to the AFC Shearer front AFC push start in the prepared niche and begins the excavation of the new runway coal.

The disadvantages of the method are the complexity, the complexity and danger of works on carrying out a niche, a need for individual mounting niches, great time on the translation of the harvester on a new excavation band (Dokukin A.V., Frolov A.G. "the Creation and development of coal combines, M., Izd-vo "Nedra", 1984, p.39).

4. The known method of transfer auger of the combine on a new excavation band in full-mechanized Stopes using special nienalezne machine NM adopted as a prototype (Malt, Zaykov, Pervov. "Mining machines and automated complexes", M., Izd-vo "Nedra", 1981, str-304, figure IV. 53).

The method is as follows: there is a niche, rectangular shape, length, p the ate to the sum of the lengths of two lengths nienalezne machine 2l NNMand the length of the Shearer lDCfor the front gate of the Shearer in the second ledge niches front AFC push.

Cleaning powered system can be equipped with one or two twin-screw nistatin machines depending on the technology of the Shearer (one-way or chelnokova schemes of work). The sequence of operations for carrying out a niche following: twin screw nishinarita machine with rotating augers, resting the side rails on the special beam forming with a part of the AFC triangular frame, a shifting of the cantilever part of the conveyor moves the front at the bottom (figure 1, item 1), while lagging Executive body is put in a special short niche in gathering the support, feed nienalezne machine along the lava removed the strip of coal to a distance of lNNM+lDC(1, 2)nishinarita machine returns to its original position, moving the shields, the AFC is fed to the bottom front starting lagging auger nienalezne machine in a special short niche (Fig 1, 3), nishinarita machine is fed along the lava at a distance of lNNM+lDC, this impressive ship auger previously destroyed the coal, and the backward screw destroys the face is and the depth of In C(width of the auger of the Shearer), further advancing the screw in end of the machine destroys the array to a depth of InCand ship the coal face conveyor (figure 1, pos.4). Nishinarita machine returns to its original position (figure 1, item 5). Upon return of the Shearer back removed the strip of coal equal to the width of the auger of the Shearer (figure 1, pos.6), AFC push Shearer got in a niche, and nishinarita machine lagging screw is put in a short niche (figure 1, pos.7). After this begins the process of excavation. Thus the cycle time of carrying out a niche and translation of the Shearer on new excavation bandwidth is the amount of time listed.

The roof niche is shifting sections of the main roof support is installed in a recess of individual posts to support the roof.

The disadvantages of this method are the large size of the niche and the high cost of its implementation and to purchase equipment - nienalezne machine and triangular guide to the chain feed mechanism, reducing the service life of the pipeline, the impossibility of complete overlapping of works on carrying out a niche and work of the Shearer in the recess, the necessity of advancing sections of the main supports to maintain the roof in a niche or install individual lining and SL is therefore the increase in volume, and in another case, a staff staff stope.

The technical result of the invention is to improve the performance of modern complex-mechanized longwall mining by reducing time auxiliary operations, reduce hardware costs, improve the service life of the pipeline, exceptions, multiple bends rod conveyor with a simplification of the treatment works.

The technical result is achieved in that the method of translation of the Shearer with screw Executive bodies with unilateral scheme notches on new excavation band, including a preliminary niches and frontal movement in it of the Shearer, characterized in that the end of the lava at a distance equal to the distance between the axes of the augers harvester, Buryats niches round shape (wells) to a depth equal to one width of the harvester, while combine augers are installed along the axis of the borehole, where the frontal flow combine hub screws are well, and the blades of the augers destroy the array and give the coal on the conveyor.

Also the technical result is achieved by the method according to claim 1, characterized in that when chelnokova scheme niches round shape (wells) are drilling to a depth equal to two width of the harvester.

The way the implementation of the is as follows. At the end of the lava (or terminal parts of the lava) long full-mechanized Stopes for translating screw of the Shearer on new mining strip in place of the axis of the screw of the Executive body of the Shearer proburivaya (for example, machine EBGP-2) does not require mounting hole round shape with a diameter less than the diameter of the hub of the screw length, and the cut of the Shearer is normal frontal advancing conveyor at the bottom together with the combine, and the hub of the auger of the combine is in the hole without resistance, the rest of the array to the size of the blades of the auger breaks end cutters, and destroyed minerals unloaded the blades of the auger directly on the conveyor, as during normal operation. The method of translation of the screw of the Shearer on new mining strip is illustrated by figure 1 and 2.

The number of wells and their location depend on the number of screw Executive bodies used for a Shearer and location of the drive AFC. When the location of the drive AFC directly in lava necessary two wells, so the rest of the Executive body of the Shearer does not reach the roadway, the location of the conveyor drive in drift necessary a well.

This is Lina wells is defined as follows.

When chelnokova scheme of work

Ln=2VC+ΔL,

whereC- width of the harvester;

ΔL - range of the notch, compensating possible tastebook well.

When unilateral scheme of work

Ln=C+ΔL.

The diameter probatively wells must be

dn=DTSN+Δ,

where DTSN- hub diameter auger excavation of the harvester;

Δ - radial stock to compensate for the inevitable tastebook well and facilitate the winding of the hub of the Executive body in the well.

The end sequence of operations for preparing niches and translation of the Shearer on new mining strip, for example, when the location of the drive AFC in lava and unilateral scheme of work of the Shearer

Starting position: Shearer is on the new excavation area and moves with the excavation of minerals from the area of the notches, drilled two wells of depth Ln=C+ΔL at a certain distance L2(depending on the size of the Shearer) from the beginning of the lava, the distance between the wells is equal to the length between the axes of rotation of the augers L1(figure 2, item 1), with the full cycle of drilling does not exceed 15 minutes. During the reverse course of the Shearer moves idle (figure 2, item 2), the harvester returns to its original position, the neki positioned along the axes of the wells (figure 2, 3), after which the front AFC push on the value of BCShearer served on the face (figure 2, pos.4)with hub screw harvester are wells without resistance, the rest of the array to the size of the blades of the auger breaks end cutters, and destroyed minerals unloaded blades screws directly onto the conveyor augers up to the roof and Shearer served by a distance equal to not less than the radius of the screw (figure 2, item 5), then shearers processing top zelick, returns to the beginning of the lava (figure 2, pos.6), screws are positioned in accordance with standard technology stope. Begins the process of excavation.

The end sequence of operations for preparing niches and translation of the Shearer on new mining strip, for example, when the location of the drive AFC in lava and chelnokova scheme of operation of the Shearer

Starting position: Shearer is on the new excavation area and moves with the excavation of minerals from the area of the notches, drilled two wells of depth Ln=C+ΔL at a certain distance L2(depending on the size of the Shearer) from the beginning of the lava, the distance between the wells is equal to the length between the axes of rotation of the augers L1(figure 3, item 1.), this tramadolnow drilling cycle does not exceed 15 minutes. During the reverse course with the notch Shearer removes a strip of mineral width BCequal to half the depth of the drilled wells (figure 3, item 2), at the end of the Shearer ahead of the auger is lowered to the ground (Fig 3, 3) and the harvester returns with the notch on the distance remaining Telicka between the Executive bodies (figure 3, position 4), the harvester returns to its original position, and advancing the auger is positioned on the axes of the wells (figure 3, item 5), then the front AFC push on the value ofCShearer served on the face (figure 3, pos.6), hub screw harvester are wells without resistance, the rest of the array to the size of the blades of the auger breaks end cutters, and destroyed minerals unload auger blades directly on the conveyor closest to the roadway auger rises to the roof and Shearer served on the distance Telicka from the beginning of the lava to the place of notches ahead of the screw (figure 3, pos.7), Shearer returns to its original position, the screws are positioned in accordance with standard technology stope (figure 3, item 8). Begins the process of excavation.

The table lists the complete set of treatment mechanized complexes drilling nesteroidnymi machines depending on the schema extraction and designated RA is the position of the actuator.

The actuator is located in the roadsideThe actuator is located in a lava
Chelnokova scheme24
Unilateral scheme12

When translating screw of the Shearer on the new strip mining method proposed excluded bending of the rod conveyor and passes harvester on the curved part of the pipeline that increases service life of the rod conveyor and simplification maintain straightness stope, which is especially important for maintaining sustainable technology complex-mechanized stope in General, as on curved sections of the extraction speed of the harvester is lower than on straight, thus the lack of curves in the bottom will reduce the full cycle of excavation and, therefore, increase the performance, no additional shifting of the sections of the main roof support bracket niches individual support, greatly reduced dimensions niches, technology in complex-mechanized mining face is simplified.

1. The method of translation of the Shearer with ø what covini Executive bodies on new mining strip at the location of the drive AFC in lava and unilateral scheme notches, including the movement of the harvester with the excavation of minerals from the area of the notches, characterized in that the end of the lava at a distance equal to the distance between the axes of the augers harvester, drilling two wells to a depth equal to one width of the combine, the next Shearer moves idle at the end of the lava, then combine augers are installed along the axis of the borehole, where the frontal flow combine hub screws are well, and the blades of the augers destroy the array and produce minerals on the conveyor with the subsequent movement of the harvester and the formation of a new excavation strip.

2. The method of translation of the Shearer with screw Executive bodies on new mining strip at the location of the drive AFC in the roadway and chelnokova scheme of excavation, including the movement of the harvester with the excavation of minerals from the area of the notches, characterized in that the end of the lava at a distance equal to the distance between the axes of the augers harvester, drilling two wells to a depth equal to two widths of grip harvester, then Shearer removes a strip of mineral width equal to half the depth of the drilled hole, then combine augers are installed along the axis of the borehole, where the frontal flow combine hub screws are well, and the blades of the augers R will truhaut array and produce minerals on the conveyor with the subsequent movement of the harvester and the formation of a new mining strip.



 

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