SU1490281A1 - Method and apparatus for mining gently-sloping coal seams - Google Patents

Abstract

The invention relates to the mining industry and is intended for deserted excavation of very thin flat and inclined coal seams. The goal is to increase the production of cleaning work when excavating seams with a capacity of less than 0.3 m. First, ventilation and haulage drifts are conducted. On the side of these drifts, the bottom is insulated and sealed with bridges 3 and 4, and on the side of the developed space, the bottom is sealed with a thrust long shell 1 installed behind the coal saw. On the drift side, hydraulic jacks 12 and 13 are attached to the hull of jumpers 3 and 4 to press them against the drift wall the place of contact with the face. The ropes of the rod 7 of the saw are introduced into the face through the front windows of lintels 3 and 4, which have glands. Shell 1 is introduced into the face through the rear window. The coal is driven by coal saw with simultaneous supply and supply of water to the bottomhole through the nozzle and lintels 3 and 4. Hydraulic pulp transport is carried out under the pressure of the water. Jumpers 3 and 4 and seals installed along their perimeter on the inner side move as the pins move, bringing them to the depressurization state. The water supply and saw operation is stopped. Shell 1 is easily adapted to the thickness of the formation by changing the shape when filled with air and due to the possibility of making it of any desired size. Oil seals prevent water breakthrough during the forward-return movement of the traction organs 7 saws. Simultaneously with the excavation of the coal, a space is laid. 2 sec. f-ly, 2 ill.

Description

The bottom is sealed with a thrust of the lengthy shell 1 installed behind the coal saw. On the drift side, hydronic rock jacks 12 and 13 are attached to the hull of jumpers 3 and 4 in order to press them against the drift wall at the junction point. The ropes of the rod body 7 saws are introduced into the face through the front windows of lintels 3 and A, which have salts. Shell 1 is introduced into the face through the rear window. The coal is driven by coal saw with simultaneous supply and supply of water to the bottomhole through the nozzle and lintels 3 and 4. Hydraulic pulp transport is carried out under the pressure of the water. Jumpers

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3 and 4 and the seals installed along their perimeter from the inner side move as far as they move, bringing them to the state of expansion 1I. The water supply and saw operation is stopped. Shell 1 easily adjusts to the thickness of the formation by changing the shape when filled with air and by the possibility of making it any desired size. Oil seals prevent water breakthrough during the forward-return movement of the traction organs 7 saws. Simultaneously with the excavation of the coal, a space is laid. 2 sec. f-ly, 2 ill.

This is related to industrial conditions and can be used for ice-free excavation of very thin flat and inclined coal seams.

The purpose of the invention is to improve the performance of sewage treatment works when excavating layers with a capacity of less than 0.3 m.

Figure 1 shows a flow chart for excavation of a very thin flat layer with a complex of mechanisms in which you implement this method and device for its implementation; figure 2 - sealing device, the cut.

The method is carried out as follows.

Ventilation and haulage drifts are carried out, the face is insulated from the side of the worked-out space with the thrust of the lengthy shell 1, and from the side of the indicated drifts by bridges. Then the coal is crushed with a coal saw with simultaneous supply and supply of water to the bottom. In this case, the hydraulic transport of the pulp is carried out under the pressure of water. The jumper and sealing devices are moved as they are moved by means of shifters located on the drifts, thus they are brought to the depressurization state, and the water supply and the saw operation are stopped. Exclusion of the presence in the bottom of transport devices and ensuring the transportation of broken coal in the pulp to the drift by pumping under the pressure of water in the space between the face, soil, blood5

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The ley and lintel allows the formation to be excavated with a thickness determined by the design height of the cutting elements of the coal saw. The inflatable jumper easily adjusts to the thickness of the formation, both by changing the shape when filled with air, and by the possibility of performing any necessary pa3NfepoB. Roof management can be carried out in any manner known for very thin layers, taking into account specific geological conditions. The inflatable jumper fulfills the role of temporary bottom-hole support.

The complex consists of a corner of an U11D, KVGP, UVK type saw, providing the formation with the full power, an inflatable rubber casing 1, made in the form of a pipe, located along the bottom of the coal saw 2, 4, and 4 located on the mains with un ppKaNOi and pneumatic stowing unit. The cutting elements of the coal saw on the side of the shaving 1 are made in order to avoid damaging their rounded shape. The saw is equipped with actuators 5 and 6, located on the drifts. Ropes of a traction organ 7 ggia are introduced into the bottomhole through jumpers 3 and 4, which have a gland 8, secured 1.11 in the hole in the wall of the nozzle 9, Housing 10 of jumpers 3 and 4 are made with a ary of 10-13 mm toltsinoi steel. Front window for entering TAGSORCH; body 7 of the saw in the face has; LI; MHV 1 m, height 0.4 m. Rear window for entering

in the bottom of the hull, shell 1 has a circular cross-section with a diameter of greater thickness of the reservoir by 5–10 cm. A sealant of spongy rubber is glued along the perimeter of the housing 10 on the side of the slab. On the side of the drift, hydraulic jacks 12 and 13 are attached to the housing 10 of the hinge lintel but they are pressed against the wall of the drift joint at the interface with the face. The ends of the inflatable casing 1 are brought to the drifts through round windows in the housing 10. The connecting pipe 9 of the jumper 3 is connected to the flexible section 14 of the general mining pressure water conduit, and the connecting pipe of the jumper 4 to the flexible section 15 of the slurry line. Discharge conduit and slurry line have an internal diameter of 300 mm. On the pressure conduit there is a bolt of the ZUG type.

The backfill installation consists of a flexible backfill pipe 16 located along the entire length of the lava next to shell 1 connected to the backfill machine 17. The backfill machine 17 is located on the rails of the upper drift with the possibility of reciprocating movement along the belt conveyor 18. For filing of the filling material from the conveyor to the handle 17 is equipped with a plow diverter from the load-bearing surface of the belt. For pulling the flexible pipe along the bottom there is a winch 19, the rope of which is attached to the end of the backfill pipe 16.

The complex works as follows.

Jumpers 3 and 4 are mounted on drifts so that the rear walls of the windows through which the saw ropes 7 of the saw are inserted are close to the face at a distance of 0.15-0.2 m, i.e. The bottomhole entry section is minimal and is about 0.04 m. With jacks 12 and 13, the bridges are pressed against the walls of the drifts, while seals 11 are pressed into the wall unevenness, sealing the entrance to the bottom. From the blower of the stopper 17, the shell 1 is filled with air. Under pressure of 3-4 MPa, its upper and lower parts are tightly pressed against the roof and soil along the entire length of the lava, sealing the working space of the saw 2 from the developed space and supporting

roof in the bottomhole space. In jumper windows 3 and 4, when inflated, the jumper is self-sealing around the perimeter of the windows. On the mates, the sheath spreading is higher in height than in the lava, due to the fact that the diameter of the inlet ports for it exceeds the reservoir thickness, thus ensuring reliable sealing of the mates. Thus, after pressing the bridges and filling the casing, the space between the bottom and the soil, the roof and the casing turns into a part of the pressure pipeline. The valve in the pressurized water reservoir opens and, under pressure of 4-5 MPa, through the pipe 9 and the housing 10, water is supplied to the bottom. Executive body 2 is activated. Epiploons 8

0 prevent water breakthrough during the forward-return movement of the cable traction organs 7 saws. The coal recovered by the executive body 2 enters with water in the pulpway and is transported therein to the next transport device within or outside the excavation section or to the water separation unit. In the drawings, the solid arrow shows the movement of water in the conduit, the dotted

arrow movement of the pulp along the slab, and the dash-dotted movement of the pulp in the pulp flow.

After moving the tab for 1 m of cable, the abutments rest against the front walls of the windows in the housing 10. At this time, the actuators 5 and 6 are turned off. The pumping of water then continues until all the pulp is removed from the lava. Further, the flow of water into the lava stops. At the same time, they depressurize 3 and 4 and the shell 1. The remaining water from the lava falls into the groove of the lower drift. Next, the winch or jacks move the jumpers and the shell to the starting position of the next cycle and the process repeats. Simultaneously with the excavation of the coal, a space is laid.

Q When pulling a flexible conduit along the lava, the long shell 1 serves as a guide for it. The width of the space between the bottom and the backfill array does not exceed 1.6 m (with

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considering the distance between the face and the jumper of 1 m, the width of the jumper in an inflated condition of 0.3 m, the diameter of the backfill pipe 0.15 m, and the output value of its tip in

side of the backfill array O, 1 m) of the array O, 1 m.

Claims (2)

1. A method of developing flat coal seams, including carrying out ventilation and haulage drifts, cutting coal with a coal saw, maintaining and isolating the bottom of the developed space, supplying and supplying water to the bottom, and hydraulic transport of the pulp along the bottom, characterized by that, in order to increase the productivity of cleaning operations when excavating seams less than 0.3 m thick, the bottom is isolated and sealed from the drift side with jumpers, and from the side of the floatted space, the bottom is sealed with a spread of long shells, while the hydraulic transport of the pulp is carried out under head pressure. 2. Device for the development of flat coal seams, including a coal saw with a traction body in 12.13 Editor M.Tovtin Compiled by V. Tychina Tehredm. Hodanich Order 3676/35 Circulation 449 VNIIPI State Committee for Inventions and Discoveries at I KIT USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. The saw body, pulp hole, coal saw and winch drives, characterized in that, in order to improve the performance of the cleaning work when dredging less than 0.3 m, the device is equipped with a long shell that is installed behind the coal saw, while the ends of the said shell are connected with the ends of the coal saw body and slurry line by means of jumpers, which are pivotally connected with them from the outer side relative to the coal saw, slurry line and long shells of hydraulic jacks, and from the inner side of the jumper with abzheny seals which are mounted on the perimeter of said inner sides of the webs, the webs formed with the rear ends to input lengthy casing window and the front window, which has a nozzle for introducing a slurry pipeline and it caul vsholnenny to input traction blade body. / R2, h FIG. 2 Proofreader L. Beskid Subscription