SU1763578A1 - Water-discharge mine installation - Google Patents

Description

one

(21) 4898848/33 (22) 02.01.91 (46) 09/23/92. Bul No. 35

(71) Donetsk Polytechnic Institute

(72) C. V. Pak and D. E. Antonov

(56) USSR author's certificate No. 621901, class E 21 F 17/00, 1976

USSR Author's Certificate No. 1217992, cl. E 02 D 19/00, 1984 (prototype).

(54) WATER DEPTH STANDARD INSTALLATION

(57) Utilization: dewatering of underground workings in the construction and mining industries. Essence

invention: the installation includes a pumping chamber with pumps, a sump, a sump connected to it. Placed within the limits of the latter, a device for stirring up solid sediment, which is made in the form of transverse partitions installed successively along the catchment basin with overflow gaps above the bottom of the catchment basin. The bypass gaps may have a living cross-section area increasing from the sump, and each partition may partially overlap the width of its bypass gap. The overlap gaps are placed along the catchment basin in a staggered order of 3 s. n. f-ly, 3 ill.

The present invention relates to mine and mine drainage and can be used in the drainage installations of mines and mines, as well as in other areas of the mining industry.

A known drainage installation 1, including a pumping chamber with drainage pumps, an adjusting vertical water collector located below the inclined emergency water collector. During normal operation of the installation, the influx with the solid contained in it enters the regulating water collector. At the same time, due to the sufficiently effective sludge flushing, the emergency water collector is maintained in a cleaned state. At the same time, the organization of the water suction pumps drainage due to a significant increase in geometric height in height

with

Vani. This controversy can be resolved by using buried pump chambers, as in 1. However, this in turn reduces the safety and reliability of the installation due to the constant threat of flooding of the chamber due to burial.

The known installation scheme 2 includes a pumping chamber with drainage pumps, a sump well, a water collector connected to it and a solid sedimentation device placed within the latter — an inlet pipeline that ensures continuous maintenance of the solids in an agitated state when transporting it from the inlet to the outlet of the water collector, those. to the receiving well. The scheme, of course, increases the efficiency of solving the problem of solid removal, compared to 1. which is especially important for horizontal water tanks. but

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It also does not provide a complete solution, since with the reverse in the scheme, from the side of the well, the catchment basin is filled with inflow, a part of the solid still settles on its bottom with a gradual, longer, but not completely excluded, slamming process. As a result, this solution is characterized by a reduced level of sediment removal efficiency.

The purpose of the proposed invention is to increase the efficiency of removing solid sediment.

This goal is achieved by the fact that, in a drainage shaft installation, a device for stirring up solid sediment is made in the form of transverse partitions installed successively along the catchment basin with overflow gaps above the bottom of the catchment basin.

In the first additional embodiment, said gaps have an area of their living section increasing from the receiving well.

In the second additional embodiment, each partition is made with a partial overlap of the width of its overflow gap.

In the third additional embodiment, the overlap clearance is positioned along the catchment basin in a checkerboard pattern.

FIG. 1 shows the drainage system as a whole; FIG. 2 shows the floor plan, and FIG. 3 shows the floor placement scheme along the catchment basin.

The drainage installation (Fig. 1) includes a pumping chamber (not shown in the drawing) with pumps 1, placed in it, a drainage well 2, a catchment 3 connected to it, placed within the latter a device for roiling solid sediment made in the form of sequentially installed along all or part of its length L) transverse partitions 4, with overflow gaps 5 above the bottom 6 of the sump 3. The latter has an inlet portion 7 which, depending on the particular installation, can be performed differently. In a number of cases, it can be used to equip a preliminary sedimentation tank (not shown in the drawing), although it is not always necessary to use it in this scheme.

The difference of the first additional variant is that the bypass gaps 5 have an area of their living section increasing from the receiving well 2.

The difference of the second additional variant is that each partition 4 is made with a partial overlap 8 of the width of its bypass gap 5 (Fig. 2),

The difference of the third additional option is that the mentioned overlaps 8 of the bypass gap 5 are placed along the catchment 3 in a checkerboard pattern (Fig. 3).

In all cases, the partitions 4 are hermetically sealed with respect to the side walls 9 and 10 of the sump 3, and with a gap 12 with respect to the ceiling 11 (although in principle it is possible, in

5 separate cases, and hermetic performance).

In the variant with installation of partitions 4 along the entire length of the catchment basin 3, the drainage installation functions as follows. After the next drainage of the sump 3 to the lower level (LL) by the pump 1, the drain is turned off. After this, the next process of filling the catchment box 3 with water begins.

5 to the upper level (WU).

In the process of filling, the inflow first enters the inlet section 7 and if it is equipped with a preliminary settling tank (not shown), then a part of solid,

0 mainly coarse, settles there (trapped).

Filling the subsequent space equipped with partitions 4, up to the receiving well 2, realizing only through the gaps 5 At the same time, the flow through each of the latter sharply increases the bottom velocity (due to the narrowing of its cross section in the gap 5).

0 only in the gap itself 5, and even at a certain distance behind it, since the outflow of the flow occurs in the form of a bottom turbulent jet. At the same time behind the gap 5 there is a gradual expansion

5 jets with a natural decrease in the level of speed in it. However, before following them to the gap 5, directly in itself and behind it, the flow again narrows. Thus, the transit flow area in the catchment 3 has a wave-like shape (FIG. 1) with some expansion in the intermediate sections between partitions 4 (area A).

This pattern of flow is maintained.

5 up to the level of water filling corresponding to the upper edges of the partitions 4. If the elevation of the substation is higher than the latter, then a further increase in the level will occur simultaneously with the fluid moving over the partitions

A. This will naturally reduce the level of velocities in the bottom region. However, the duration of such a mode of movement in the catchment basin 3 can be made sufficiently short, which has practically no effect on the quality of the bottom process of roiling. At the same time, the preservation of the gaps 12 will ensure the complete filling of the heap to the WU along its entire length. On the other hand, it is possible that the placement of the WU mark below the upper edges of the partitions 4 may be more acceptable (its feasibility is established during the Operation of a particular installation). In any case, the previously noted undulating nature of the floor of increased bottom velocities will take place practically throughout the entire period of filling of the sump 3.

After reaching WU, the pump 1 is turned on and the process of drainage of the catchment box 3 begins. At the same time, the quality of the half velocity along the catchment basin is fully preserved. However, the average level of bottom velocities will increase further, due to the fact that the flow of pump 1 always exceeds the magnitude of the water inflow. In both noted modes of operation of the plant, at each jumper some pressure differential Ah is formed, which is used to overcome the energy loss in the gap area 5. In the drying mode, the value of A h increases slightly due to an increase in the flow rate of the liquid along the water collector 3. When the level of the liquid of the NU pump 1 is turned off and the next, previously mentioned process of filling the sump 3 with water again begins.

As follows from the preceding, a more or less elevated level of flow rates will continuously take place in the bottom region of the catchment basin. This factor, in fact, is decisive in terms of the complete elimination of the sludge collector of the sump 3. The required level of speed is easily ensured by an appropriate choice of the values of the gaps 5 and the distances I between adjacent partitions 4. (In most cases the size of the gaps 5 will be in the range 50 ... 100 mm, and length I in the range 5 ... 10 m).

In the process of pumping the inflow, the agitated solid along with the liquid is taken up and is discharged further by the pump 1 of the drain. When a pre-sedimentation tank is present, it is periodically cleaned of sediment by one of the known methods.

The operation of the installation in the version equipped with partitions 4 only a part of the length of the sump 3 is characterized in that the precipitation of coarse solid will take place on the entire inlet section 7, up to the first of a number of partitions 4. This option is simpler in design. The increased area and deposition capacity provided thereby allows the process of cleaning the sump 3 from sludge with greater time flexibility. Moreover, by maintaining the total differential, 5 ... 1 m, in section 7, the conditions for intensive sedimentation of solid particles are sufficiently acceptable.

Thus, in this embodiment, the catchment 3 is quite simply divided into two opposite parts in terms of its functions: inlet 7, settling, and outlet, equipped with partitions 4, substantially longer in length, continuously maintained in a cleansed state.

The difference in the functioning of the installation variant, in which the gaps 5 have an area of their living section increasing from the receiving well, is that the average level of flow velocities and the value of Ah will fall in the same direction. As a result, at the initial moment of operation of the installation, some solid deposition will take place and in the area equipped with partitions 4, its intensity will increase in the same direction, i.e. as the well 2 is approached, the layer of settling solid will continuously decrease. Due to the resulting blind area process, a new bottom surface b of the catchment basin 3 is formed, having a certain slope towards the well 2. After the new values of the gaps 5 are approximately close to each other (due to the formation of a new inclined surface of the bottom 6), it is advisable to switch; for some time, the operation of the installation on its other catchment basin. The formed separation of the solid is compacted in this case and can later serve as a new bottom with an increased slope (with a horizontal initial type of catchment basin). Due to this, the process of filling and draining the catchment basin 3 (with the same inflows and gaps 5) will proceed with smaller values of Ah. The latter allows extending the range of use of this solution to collectors with large lengths L (Of course, the described process

degree depends on the properties of the solid medium and must be worked out in a purely empirical way directly at each specific drainage installation).

The difference in the operation of the plant in the second additional variant (Fig. 2) is the following. The presence of a partial overlap 8 of the width of the gap 5 makes it possible to increase the value of the latter while maintaining the area of gap 5 required for the passage of an inflow. Such an option is advisable in cases where without the overlap of 8 this value becomes excessively small and difficult to form. In addition, the overlap 8 serves as a support for the partition 4. The operation of the installation in this case is similar to the previous one, except that the overlap 8 may form a shadow area with the appearance of a small local area of solid deposition.

In the staggered order of placing the ceilings 8 among themselves, the third additional variant (FIG. 3), said shadowing zones are minimized, since in this case there are flows with transverse currents of the liquid, as shown in FIG. 3), washing away shadow zones.

Thus, in all variants of the installation, a complete and guaranteed solution to the problem of eliminating any significant slime of the drainage boxes of drainage systems and mud flows of large masses of solid ones into receiving wells is provided. This ultimately provides a significant increase in the efficiency of the solid sludge removal process (and on this basis, an increase in the level of safety and reliability of the mine drainage system as a whole).

0 f o rum u l a i z o b e te n u

Claims (4)

1. A dewatering mine installation, including a pump chamber with drainage pumps, a sump well, a water collector connected to it, placed within the latter, a device for stirring up solid sediment, so as to increase the efficiency of solid sediment removal, solidification device Sediment 0 is made in the form of transverse partitions installed along the catchment basin, with overflow gaps above the bottom of the catchment basin. 2. The installation according to claim 1, characterized in that 5 the bypass gaps have an area of their living section increasing from the receiving well. 3. Installation on PP. 1 and 2, that is, so that each partition is made with a partial overlapping of the width of its overflow gap. 4. Installation on PP. 1 and 3, about tl and h and y - sch a and so. that the overlap gaps are placed along the catchment basin in a checkerboard pattern. 35 i 8-8 PL 8 5 FIG. 2 gd YU J. R Fiz.Z