SU1352059A1 - Method of mining thick steep seams - Google Patents

Abstract

The invention relates to the mining industry and improves the reliability of the flexible overlap control. The method includes the excavation of the leading undercut layer by the shield unit 8. The excavation is carried out by alternately shifting odd 9 and even 10 lining sections of the aggregate 8 and creating bottom 17 and rear 15 outlets. The coal interlayer is first destroyed under odd sections 9. Then, the pillars are formed over the even sections. Coal is released through windows 17 between the tops of the even sections of the 10 lining. Then coal is gradually released from the pillars through the windows of the odd sections 9 with each step of the advancing of the lining. The coal is beaten in front of the sections 9 through the windows 17 and is fed under the lining, and conveyor-sided 12 is delivered to the coal-fired furnace 4. After stripping, the next pair of boreholes 5 are charged. 5 Il. (O (L S 72) fO

Description

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The invention relates to the mining industry and is intended to develop thick steep seams with inclined layers with flexible overlap.

The aim of the invention is to improve the reliability of control of flexible overlap.

FIG. 1 shows a diagram of the preparation and processing of the column with the use of a shield unit; FIG. 2 is a diagram of coal production from the interlayer through the rear discharge window; in fig. 3 shows the arrangement of boreholes in the interlayer thicker over the odd pattern of the elongated sections in FIG. - start-up of coal from the interlayer stratum through the bottom-hole oKHaj in FIG. 5 shows section A-A in FIG. 3

The method is carried out as follows.

Ventilation is carried out 1 and 2 drip drifts, which knock off the ramp 3 at the far boundary of the site. At the near edge of the pole, two paired coal-fired furnaces 4 and 5 are conducted, which are knocked down with cable 6. Sca 3 is additionally connected to the haul drift by a ventilation hook 7. For mounting the unit, an inlet below the ventilation drift is used to mount a mounting chamber in which the unit 8 is mounted on the soil of the formation. The unit includes lining containing odd 9 and even 10 sections having a common fence 11, and a conveyor belt 12. From the mounting layer, flexible overlap 13 is attached to the mounted unit, which is attached to the formation soil with anchors directly behind the unit lining fence. The cleaning works in the lower layer begin after the ventilation drift is extinguished within the limits of the removable column.

The coal extraction cycle in the mining face includes the following main operations: excavating two or three coal tapes with a conveyor belt in the podchechny layer 14 with partial release of the destroyed coal through the rear outlets 15 formed during advance advancing of the even sections of the 10 lining; destruction by means of drilling and blasting operations of the interlayer coal stratum 16; the release of broken coal through the bottomhole exhaust ports 17 under the unit and transporting it by conveyor-round 12 to the coal discharge furnace 4.

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The starting point is the position in which all sections of the support of the unit are pushed to the chest of the bottom of the slide. lay First, the conveyor belt 12 removes the coal ribbon in the prickling layer 14 to the height of the aggregate lining, and then the even sections 10 are moved to the face. At the same time, the rear edge of the upper even section that is not connected in the plane of the reservoir to the barrier shield is removed from the barrier one step advancing the outlet window 15 between the fence and the adjacent tops of odd sections 9. The coal pillar above the windows formed by the pressure of the collapsed rocks transmitted through the fungal overlap 13 and its own weight is destroyed into pieces and you it is let through the outlet port 15 under the lining on the conveyor belt, which transports them to the coal-fired furnaces. After the release of the coal, the rear outlets overlap to protect the working space from falling pieces of coal.

Releasing all the coal, which was above the rear exhaust ports 15 of the unit, move the odd sections 9 along with the shield fencing and extend into the overhanging flexible overlap. The front and rear row hydraulics can be controlled both jointly and separately. Then, the conveyor belt 12 removes the next coal ribbon in the podchechny layer 14, moves the even sections 10 of the support and releases coal from the interlayer stratum 16 through the rear outlets 15. In the presence of a weak coal, the odd sections 9 are shifted to the interlayer and removed the next tape in the cutting layer 14.

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With a strong angle in the interlayer, after removing the ribbons in the undercut layer, shifting the even sections and discharging the coal through the rear outlets 15, the coal is destroyed in the interlayer thicker 16 over the odd sections 9 by drilling and blasting. To do this, through the bottomhole exhaust ports, 17 separate sections with a length of 9–10 m are used to make an interlayer thickness of 16 short and long holes. Short holes are drilled in the middle of the exhaust ports and during blasting

blown up with a 25-millisecond advance.

The broken coal in front of the odd sections 9 enters the bottomhole exhaust ports 17 under the lining, and it is transported by conveyor-side 12 to the coal-fired furnace 4. After stripping the bottom of the conveyor-line, the next batch of holes is drilled and coal is dredged from the interlayer 16 in the adjacent section. Thus, the coal is dredged from the ceiling along the entire length of the switchboard assembly, after which the odd sections 9 are moved to the advancing step. Next, the coal belt is removed from the conveyor belt in the sweep layer, performed the first operation of the next cycle. When coal is discharged through the bottom hole exhaust ports 17, flexible overlap 13 keeps tape sags 18 from being left hanging on the top of even-numbered sections 10. These coal pillars are crushed by rock pressure and, when the shield assembly is moved, are pushed onto the rear exhaust ports 15, and crushed coal is spilled through them under the shield shield unit.

Claims (1)

Invention Formula A method of developing powerful steep seams, including the excavation of the advance cutting layer with a shield unit, destruction of the interlayer thickness of coal above the lining sections under flexible overlap and coal output through exhaust ports in the top lining sections, in order to improve the reliability of the flexible overlap control , the excavation of the leading cutting layer lead 5 by alternately shifting the even and odd sections of the shield of the shield assembly and create bottomhole and rear outlets, and the interlayer thickness of the coal first destroys Q over odd lining sections and form tape pillars over even lining sections, then release coal through bottom-hole outlets between the upper even sections 5 lining, then gradually release coal from tape pillars through the rear outlets between the tops of the odd lining sections at each step of its shifting, after which the work cycle is repeated. /four 2 sixteen Sh sixteen FIG. 4 Editor TLazorenko Order 5546/27 Circulation 453Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Compiled by B.Mashkovtsev Tehred M. Khodanich Proofreader S. Shekmar