Method of mining deposits chamber-and-pillar mining

 

(57) Abstract:

The invention relates to mining and can be used for underground mining average power of bedded deposits of minerals. In the proposed method, following excavation of benches excavation cameras save by a consistent set of sections of the hydraulic roof support of amplification, which, as a longwall camera, turn, reverse, extracted from the waste before the camera, put in a transport position and transported under the protection of the previously installed sections of hydraulic roof supports strengthening in the adjacent excavation chamber. The invention allows to reduce the loss of minerals in the pillars through the use of hydraulic roof supports amplification or self-propelled mechanized roof supports, as well as to expand the scope of application of the method in more severe geological conditions and to provide a direct-flow ventilation. 5 C.p. f-crystals, 6 ill.

The invention relates to mining and can be used for underground mining average power of bedded deposits of minerals with gently sloping and sloping bedding in the stable and the average stability of the shelter is otci for a seam of average power, including the division of a mine field on the panel holding the panel drifts and paired panel drifts at right angles thereto, which hold the camera, development and testing of panels from the boundaries of a mine field to the main transport passage, by leaving in the developed space of pillars with the help of a few specialized machines that move on their own and can serve alternately faces multiple cameras, or using the mining combine cutting of coal in front of the forehead of the face, in the complex which are self-propelled vignette (Vorobyev, C. M., Burakov A. C. fundamentals of technology of mining. Introduction to the field. The tutorial. M.: Nedra, 1973, 175-177 C., Fig.116).

Chamber systems are characterized by a significant loss of the mineral in mercanery the pillars, which left more than 40% of the stock.

Closest to the proposed to the technical essence and the achieved result is a way to mine the deposits of the chamber-and-pillar design, including the holding and fastening mines and cutting between cameras, leaving mercanery pillars, the notch which produce the benches in the direction from vantico N. K. , I. Chernyak L. the Process of underground mining operations. Textbook for high schools. M.: Nedra, 1982, 212-215 C., Fig. X. I) is adopted for the prototype.

The main disadvantages of the known solutions are limited scope, the limiting factors are: the relatively high losses of minerals, significant complexity to maintain roadways, fortress minerals, low safety, capacity and gas content of the formation.

To reduce the loss of minerals leave the pillars, to improve the safety of work possible by increasing their carrying capacity, for example, by installing additional reinforcing hydraulic roof supports.

The invention consists in that the method of mining deposits chamber-and-pillar system development includes conducting and fixing of development workings and cutting between cameras, leaving mercanery pillars, the notch which produce the benches in the direction from the ventilation drift to the transport passage, and leaving the security pillar of the mineral, however, following excavation of benches, excavation cameras save by serial setup sekm, removed from the waste before the camera, put in a transport position and transported under the protection of the previously installed sections of hydraulic roof supports strengthening in the adjacent excavation chamber.

In addition, zagadki you can work out the separation between pillars fossil.

In addition, zagadki you can work out presecco to each other, without leaving pillars fossil.

In addition, the notch mercanery pillars possible to produce single-sided or double-sided benches.

In addition, it is possible to maintain ventilation or transport drifts by installing them in sections hydraulic roof supports strengthening, which, as the repayment of the cameras move from the zone of stable rock pressure in the area of primary influence of the reference pressure.

In addition, section hydraulic roof supports gain may be set along the normal or at an angle to the longitudinal axis of the mine workings.

The causal link between the claimed set of distinctive essential features and achievable technical result is the following.

Sign - "following excavation benches myelocoele conditions, not hoping bolting, to reliably cover the roof of the excavation of the camera by selecting the camera, for example, between anchors hydraulic shoring gain, giving it a certain thrust, i.e. immediately to give her the necessary effort that will improve the stability of the roof, and therefore, reduction of the width of the left pillar of minerals, and as a consequence the reduction of losses.

Sign - "which, as a longwall camera, turn, reverse, extracted from the waste before the camera (the former excavation), is folded into the transport position and transported under the protection of the previously installed sections of hydraulic roof supports strengthening in the adjacent excavation camera enables progresses cleaning remove front section of hydraulic roof supports strengthening, to transport the extracted sections of the support under previously established, aspartame sections to the place of business of the treatment works, that is, as the testing of the next Zachodni re-install and bursting at the new location you extracted the shield section. Thus, the transfer of the lining reinforcement provide waste-free technology of its use, the frequency of its installation, replacement bearing capacity one, which, moreover, is not lost forever, and just participate in the circuit, returning to the role of maintaining the carrying capacity of the artificial roof.

Sign - zagadki work, leaving between them pillars of minerals allows depending on geological and technological factors to leave between the benches security messagecache pillars in order to ensure sustainability of the roof of the reservoir in the recess.

Sign - "seizure mercanery pillars produce single-sided or double-sided benches allows depending on gerotechnology conditions, mainly on the stability of the roof rocks, take a recess sided or double-sided benches when using hydraulic roof supports amplification, which reduces the number held cameras and increases the volume of the hollow benches. The advantage of the two-way scheme is the reduction of the material to mount the cameras in the period.

Sign - "vent or transport drifts can be saved by installing them in sections hydraulic roof supports strengthening, which, as the repayment of the cameras move from the zone stabilised mountain dublirovannoe supports strengthening attach a certain length of the section of the roadway by removing sections in the zone of stable rock pressure at a certain distance from the camera, transportation of these sections in the zone of high rock pressure under the shields gain and consistent construction in the area to be mined minamaneho pillar. Additional costs for maintaining the enhanced support in working out the plot generation will be reduced to the transfer of the lining of amplification, transportation and subsequent installation.

Sign - section hydraulic roof supports gain set along the normal or at an angle to the longitudinal axis of the mining" provides efficient support in the formulation depending on the required bearing capacity, ventilation, free passes, density lining, the schema shifting and transportation. For example, for placement in the transport passage in parallel with the support strengthening the scraper conveyor is possible to install shield reinforcement along the conveyor. To create in the ventilation drift a certain level of carrying capacity can be installed hydraulic shoring gain with a certain density or a certain angle to the axis of the drift.

The technical result of the invention is to reduce the loss of the mineral in the pillars due to the use of gidgiddoni conditions, providing once-through ventilation, a minimum amount of mounting and dismantling the achievement of high technical and economic indicators.

In Fig. 1 shows a single-sided circuit testing panel fields chamber-and-pillar mining with maintaining cameras reinforcing support the exercise of Fig. 2 is the same as in Fig.1, with double-sided circuit testing; Fig.3 - a view a-a in Fig.2, the same, the scheme of installation of partitions hydraulic roof support reinforcement normal to the axis of the workings of Fig.4 is a diagram of the installation of shields gain along the axis of excavation; Fig.5 is a diagram of the installation of shields gain diagonally to the axis of the workings of Fig.6 is a diagram of the notch faces presecco, without leaving pillars.

The method is as follows.

Mine field is divided into panels, the dimensions of which depend on the conditions of occurrence of the reservoir. In preparing each panel shall conduct and mount vent 1 and 2 transport drifts and cutting between cameras 3 mount, for example, an anchor support with the pickup 4. Between the cameras leave mezcaleria the 5 pillars of minerals, in which in the direction from the ventilation 1 to vehicle 2 is C mounting hole space. Conducting mining, ventilation 1 transport 2 drifts and chambers 3 are produced using the digging machine 7, for example, the type of RSCC. (Equipment for treatment and tunneling works. The catalogue. M: Naipal, 1986, S. 196-202). Transportation repulsed fossil to transport passage 1 is carried out, for example, using mine Shuttle cars 8, for example, S 15M (handling and transport equipment for the mining industry. Industry directory 20-92-03. M:, CREATEITEMS, 1991, S. 56-57). The recess of the benches 6 are using the same harvester 7, and transportation of minerals is a self - propelled carriage 8.

To ensure emergency exit and ventilation openings 1 and 2 due to mine depression following excavation benches 6 produce preservation chamber 3 by a consistent set of sections of the hydraulic roof supports strengthening 9, for example of the type of exercise (KREP gain control of the exercise. The coal. - 1994. - 8. - S. 16). Shield reinforcement 9 is installed in the chamber 3 between the anchor grabs lining 4 and pumps in the roof. The installation of shields gain made on the entire length of the chamber 3. When conducting dredging benches 6 in the adjacent working chamber section hydrovinylation move (for example, using winches), under the protection of the established sections of the exercise, in the working chamber, where again set into position using a portable pressure station (not shown).

To ensure a flow diagram of ventilation and reducing losses of minerals depending on development procedure (descending, ascending) retain transport 2 or ventilation 1 drifts. Maintaining drifts 1 and 2 on the border with collapsed rocks are also due to the application of sections hydraulic roof supports strengthening 9, which are mounted on the area of high rock pressure, and then, the stabilization of the pressure, the back section is folded into the transport position and move forward in the area of the beginning of the influence of the reference pressure.

Mining benches 6 between them are the pillars 11, in the form of narrow legs of the mineral, and the recess protect from the goaf through the pillars 12. At the junction of the roadway 1 and 2 benches 6 remain technological pillars 13.

Section hydraulic roof supports gain 9 depending on the design and purpose of excavation can be set to normal (Fig.3), along (Fig. 4) or at an angle to its axis (Fig.5). N the necessary clearances, required security works, ventilation - to ensure maximum flow section for the jet of air, diagonal support units gain can be placed under the influence of the layout of anchors and other Zachodni 6 under certain conditions, especially when the excavation chamber 3 sections hydraulic roof supports strengthening 9, it is possible to work out presecco to each other without leaving pillars, which further reduces the loss of minerals (Fig.6).

Ventilation of the camera when carrying out transport from 2 drift, and if their maturity, carried out by local ventilation fan. In the process of testing benches airing carry out the working chamber through mine depression (arrows).

1. Method of mining deposits chamber-and-pillar system design, including the holding and fastening mines and cutting between cameras, leaving mercanery pillars of minerals, the notch which produce the benches in the direction from the ventilation drift to the transport passage and leaving the security pillar of minerals, characterized in that following excavation benches viemo the extent of longwall camera alternately, reverse, extracted from the waste before the camera, put in a transport position and transported under the protection of the previously installed sections of hydraulic roof supports strengthening in the adjacent excavation chamber.

2. Method of mining, under item 1, characterized in that Zachodni work, leaving between them pillars fossil.

3. Method of mining, under item 1, characterized in that Zachodni practice presecco to each other, without leaving pillars fossil.

4. Method of mining, under item 1, characterized in that the recess mercanery pillars possible to produce single-sided or double-sided benches.

5. Method of mining, under item 1, characterized in that the transport or ventilation drifts can be saved by installing them in sections hydraulic roof supports strengthening, which, as the repayment of the cameras move from the zone of stable rock pressure in the area of primary influence of the reference pressure.

6. Method of mining, under item 1, characterized in that section of the hydraulic roof supports gain set along the normal or at an angle to the longitudinal axis of the mine workings.

 

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