RU2060398C1 - Method for preparation of waterproofing stopping for operation under emergency conditions - Google Patents

Abstract

FIELD: mining industry; applicable in prompt reliable separation of flooded section from the working part of the mine field. SUBSTANCE: method for preparation of waterproofing stopping for operation under emergency conditions includes preliminary determination of the type and number of standard waterproofing members forming the stopping for the concrete mining and engineering conditions. Then, control mounting assembly of the stopping in the kerf is performed and waterproofing members located over the working contour are secured in kerf with solidifying material. The contact of rock with solidifying material is additionally sealed. After material setting, the stopping is dismantled with leaving in the kerf only waterproofing members to which earlier dismantled waterproofing members are attached under the threat of flooding. Standard waterproofing members may be used in form of tubings. After assembly under the threat of flooding, joints between waterproofing members are additionally sealed. Using this method, two stoppings may be installed with the space between them filled with solidifying material. EFFECT: higher efficiency. 5 cl, 3 dwg

Description

 The invention relates to the mining industry and can be used to prevent flooding of mines and mines during water breakthrough during waterproofing of mine workings.

A known method of erection of a mine lintel, including the construction of a cut in the development along its perimeter, fixing it with concrete insulating shield [1]
The disadvantage of this method is the need for a significant investment of time for the construction of the jumper, which is unacceptable in an emergency.

 Closest to the proposed is a method of constructing a mine waterproofing lintel [2] consisting in the following. First, an annular cut is cut, reinforcement is installed in the cut, the ends of which are sealed into the enclosing rocks, and then a concrete wall is constructed in contact with the enclosing rocks.

 The disadvantage of this method and other known designs of waterproofing lintels and methods for their construction is that their construction begins from the moment of the threat of flooding.

 The preliminary construction of waterproofing lintels of known structures and the technology of their construction leads to the exclusion of mining from operation. On the other hand, the well-known designs and construction technologies of such jumpers require a long time for their construction, and in an emergency (threat of flooding) this time may not be.

 The purpose of the invention is to minimize the construction time of the waterproofing lintel after an emergency occurs (with the threat of flooding), which is ensured by the phased erection of the lintel while maintaining the operational purpose of the mine until the emergency.

 This goal is achieved by the fact that in the method of constructing a waterproofing bridge, including the formation of a cut in the mine, the construction of a bridge from waterproofing elements, for specific mining conditions, the type and amount of standard waterproofing elements forming the bridge are preliminarily determined. Then make the control and installation assembly of the jumper in the cut, fix it with hardening material, insulating elements located along the output circuit. An additional compaction of the contact between the rock and the hardening material is carried out. After hardening of which, the jumper is dismantled, leaving only the waterproofing elements fixed in the cut, to which, with the threat of flooding, the previously dismantled waterproofing elements are reattached. The jumper is erected, for example, from tubing, and after the jumper is assembled, with the threat of flooding, additional joints are sealed between the waterproofing elements. Two parallel jumpers can be erected, and the space between them is filled with hardening material.

 Previously, a two-stage construction of waterproofing lintels was not carried out. The preliminary, first stage is carried out in advance (before the immediate threat, maybe during the period of development). The design of the waterproofing lintel allows you to implement the proposed method of its construction and maintain the operational purpose of the mine until the second stage, the construction of the elements of the waterproofing lintel, directly blocking the output (when there is a threat of flooding). The second stage of the construction of the waterproofing lintels already requires significantly less time compared to the known structures and technologies for the construction of waterproofing lintels, which is especially important in an emergency.

 Figure 1 is a General diagram of the construction of the jumper; figure 2 jumper, top view; figure 3 the connection node of the tubing, fixed in the cut (contour), with unsecured (centrally removable).

 A method of constructing a waterproofing lintel of the proposed design is as follows.

 Is the cutting of the cut 1 along the perimeter of the mine 2 in the place where the construction of the waterproofing lintel is planned (Fig. 1). The parameters of the cutting 1 are calculated and depend on the shape of the cross section of the mine and the design of the elements (for example, tubing) that make up the wall blocking the mine. Pre-determine the type of tubing or other elements, their constructive connection to the wall blocking the mine working, the parameters are placed in the cut 1 of the contour tubing or other component elements, depending on the size of the mine working 2, mining and geological conditions and expected pressure (pressure ) to the waterproofing jumper.

 The surface of the created cut 1 is treated with a specific composition (for example, NaCl brine, KCl, water-cement composition, etc.) providing removal of rock fines, dust and elimination of possible microcracks. The construction of the body of the waterproofing lintel begins with laying a cut in the lower part 3 (in the working soil) along its entire width and length to a certain height of the hardening material solution. As a hardening material for filling the cavity of the cut level with the walls, soil and roof of the excavation, a certain composition of concrete can be used, with the necessary additives. This ensures reliable contact with the host rocks and the contour tubing 3 (or other elements), which are held in the cavity of the cut 1 and absorb the pressure from the expected pressure in the places of blocking the partition wall (tubing bridge) into the cut.

 On the created base in the lower part of the cut, the lower row of contour tubing 3 is installed. After the concrete tubing 3 of the lower row is fixed in the cut; carry out assembly and control assembly of the entire jumper. Then the remaining loose loose contour tubing 3 is fixed with concrete in the slab. After hardening the concrete, centrally removable tubing 4 is dismantled, having previously been marked. The dismantled centrally removable tubing 4 is stored in an emergency warehouse, close to the jumper construction site.

 The connection of loose tubing 4 between each other is made similar to the connection of the trunk lining. For sealing intertubing joints and bolted joints, lead gaskets are used (Fig. 3). After tightening the bolted joints and caulking of the tubing joints, concrete (hardening material) is laid in the lower part of the cut.

 A stepwise erection of the jumper is possible, when the contour tubing is initially fixed in the lower part of the cut. Then the second and subsequent rows of fixed (contour) tubing are mounted 3. The caulking of the seams and the final tightening of bolted joints are performed only on the contour tubing 3, placed around the entire perimeter of the mine. Then, work is carried out on the construction of the formwork and laying concrete in the cavity of the chunk and fixing the contour tubing 3. As the construction of the formwork and concreting, according to the design scheme, plugging, crimping, control pipelines are mounted 5. After additional tamping and crimping of the cutting part of the waterproofing bridge, dismantling of loose in cut 4 tubing (blocking the mine, except for contour) and their numbering corresponds to the control assembly. The cutting part of the waterproofing lintel is covered with shields, ladders or other means of protecting the structure from possible damage.

 The assembly of the jumper is carried out in such a way that the convex part of the jumper is directed towards a possible breakthrough of water (figure 2). This ends the first stage of construction of a waterproofing lintel of this design and the proposed construction technology (method). Mining 1 can be operated for its intended purpose (as ventilation, transport, etc.).

 In the event of an emergency (threat of flooding), the second stage of the construction of the waterproofing lintel is performed. It consists in the delivery from the emergency warehouse of tubing and other materials to the place of construction of the bridge, the installation of the tubing part of the waterproofing bridge according to the control assembly scheme and the subsequent caulking of the tubing joints.

 Such a design of the hydro-iosion jumper and the technology of its construction many times reduce the time for their erection during an emergency due to the quick and reliable waterproofing of the flooded area, and the rest of the mine field is preserved.

Claims (5)

 1. A method of preparing a waterproofing lintel for operation in an emergency, including the formation of a cut in the mine, erecting a lintel from waterproofing elements, characterized in that for specific mining conditions, the type and number of standard waterproofing elements forming the jumper are preliminarily determined, and then an assembly and mounting assembly is performed jumpers in the cut, fix in it hardening material waterproofing elements located along the output circuit, carry out additional seal the contact between the rock and the hardening material, after hardening of which the central part of the bridge is dismantled, leaving only the waterproofing elements fixed in the cut, to which, if there is a risk of flooding, the previously dismantled waterproofing elements are reattached.  2. The method according to claim 1, characterized in that tubing is used as waterproofing elements.  3. The method according to PP.1 and 2, characterized in that the tubing is installed on the end part.  4. The method according to claim 1, characterized in that after the assembly of the bridge with the threat of flooding, additional joints are sealed between the waterproofing elements.  5. The method according to claim 1, characterized in that they erect two parallel jumpers, filling the space between them with hardening material.

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