SU1553705A1 - Method of enhancing the stability of rock body in mineral mining - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to improve the safety of cleaning operations by reducing the likelihood of discharging during the development of the underlying layers. For this purpose, an advanced development of the horizontal roofing layer (PS) of the mineral is carried out. When developing a drill from a developed space in its roof and soil, paired vertical wells (VS) 3 and 4. Relatively each other, sun 3 and 4 of each pair is spread in the direction of moving the cleaning work front in the PS to a distance equal to or greater than the width of in the ascending order of the underlying (HC) 5 mineral layer. In each pair of BCs 3 and 4, one cable anchor 6 inclined across the developed PS space is installed and tensioned. As the PS is developed, the developed space is filled with a concrete paving. After the erection of the concrete slab 7, the excavation of HC 5 below it begins in an upward order. Anchor 6 transmits the tension through the overlap on the rear sight of the next unworked NA 5. This reduces the deflection of the roof 8 PS and overlap. The likelihood of formation in the roof of the HC 5 being worked out is reduced. 2 Il.

Description

Fig 2

The earned space of the PS cable speaker 6 and its tension are applied to the extent that the working space of the substation is completed, the developed space is filled with a concrete fixture. After the erection of the concrete slab 7, the excavation of HC 5 below it begins in an upward order. The anchor b transmits the tension through the overlap on the rear sight of the next unworked NS 5. This reduces the deflection of the roof 8 PS and overlap. The probability of discharging in the roof of the HC 5 being worked out is reduced, 2 Il.

The invention relates to the mining industry, and in particular to methods {of increasing the stability of the rock mass during the underground mining of powerful hardy-resistant ore bodies at great depths.

The purpose of the invention is to improve the safety of cleaning operations due to {reducing the likelihood of vyvoobrazdo ™ vani when working on the underlying layers.

FIG. 1 shows an anchored thickness before the commencement of excavation of the mineral under the overlap, a vertical section in FIG. 2 - the same, when mining a mineral under the overlap.

The process technology is as follows.

First, an advanced development of the horizontal under-roofing layer of the useful mineral is carried out. During the development of a drill from a developed space 2 in its roof and soil, paired vertical wells, respectively 3 and 4. Wells 3 and 4 of each pair are spaced apart one another in the direction of moving the cleaning work front in sub-roofing layer 1 for a distance equal to or more than half the width of the underlying layer 5 of the mineral, ,, In each pair of wells 3 and 4, one cable anchor 6 inclined across the developed space is installed and tensioned.

As the advanced layer 1 is developed, the developed space 2 is filled with a concrete-laying 7 After erecting the concrete overlap 7, excavation of the mineral resources under the overlap (Fig. 2) is started in layers 5 in ascending order, taking into account that the unstable ore body is mined, the width of the layer 5 is equal to 6-3 m. At the same time, wells 4 are located in the central part of the roof

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five

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five

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five

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layer 3 at a distance of 3-5 m between them (along the length of the layer).

As the rock pressure increases during the cleaning operation of the layer 5, the tension is transmitted by the anchor 6 to the roof. Due to the fact that the wells 4 and 3 are separated and the distance between their axes is equal to or more than half the width of layer 5, the tension force of the anchor 6 in the roof is transmitted through the concrete overlap 7 to the mineral field (reserves of the neighboring unworked layer). This reduces the deflection of the roof rocks 3 and the concrete slab, as well as the deformation of the roof of the layer 5. The likelihood of the formation of the layer 5 being worked out in the roof decreases.

The wells 3 in the roof rocks 8 may be drilled with a slope in the direction of the sweep front. This ensures the transfer of force during tensioning the anchor 6 to a large area9 located above the whole of the mineral,

Claims (1)

Invention Formula A method for increasing the stability of a mountain massif in developing a mineral resource, which includes advancing the horizontal subsurface layer of a mineral resource, drilling out of the excavated space in its roof and the soil of paired vertical wells, installing a cable anchor in each pair of wells, filling the exhausted space of concrete and under the protection of reinforced rock mass, mining of the underlying layers of the mineral in the upstream order Characterized in that, in order to increase the safety of treatment works by reducing the probability inrushes at working ni515537056 geological layers, the wells of each spacing equal to or greater than half are spaced apart relative to each other in the direction of the driven front of the cleaning operation in the sub-roofing layer the width of the upstream order of the underlying mineral layer. the width of the upstream order of the underlying mineral layer.