SU1448053A1 - Method of mining sloping ore bodies - Google Patents

Abstract

The invention relates to the mining industry and m. used in underground mining of mineral systems with the collapse of overlying rocks. The purpose of the invention is to prevent dips on the earth's surface due to the localization of the zone of collapse. The cleaning of the cleaning unit is carried out by chambers (K) in a downward order. Before breaking off the chamber stocks in the overlying stratum (NT) at the lower boundary K, they form a split slit at an angle of rock displacement. At the first stage, the ore massif K is crushed with the formation of a separation pillar (RC) between the developed space K and the collapsed rocks. At this stage, they beat off the RC and release the broken rock mass. After the RC has been crushed, the rocks from the split slot enter the waste K, forming a support from the overlying K- Then the rocks are crushed from the open space K and the NT is collapsed to form the waste space in it that is equal to the width of the RC. The rock-cured rocks form the second pillar. 2 Il. ABOUT)

Description

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The invention relates to the mining industry of Lenkosti and can be used in underground mining of mineral resources with the collapse of overburden.

The purpose of the invention is to prevent dips on the earth's surface due to the localization of the zone of collapse.

FIG. I and FIG. Figure 2 shows a section through the adjacent height chambers of the cleaning unit at various stages of development.

FIG. 1 and FIG. 2, the following designations are introduced: 1 — exhaust workings; 2 - chamber compensation space; 3 - the gap in the overlying thickness is open; 4 - separation pillar; 5 - loosened rocks of the overlying strata, b - chamber space developed; 7 - the developed space in the overlying stratum.

The method is carried out as follows.

The development of the chamber stock of the block begins with carrying out preparatory-rifled workings for final workings 1 and delivery of ore, as well as for drilling the chamber. Testing is carried out by cameras in descending order.

In order to form a compensation space in the chamber and a cutting slit, an incisive revolting passes in the overlying thickness, and in the overlying stratum the revolting at an angle of displacement of the host rocks passes, since with this arrangement the split slit in the case of sustainability of the underlying rock will not be affected any disruption m.

Then, gradually, the cutting-off unit rising in the chamber is blown up by vertical wells. After the formation of the compensation space 2 and the release of ore, similarly, a split slot 3 is formed in the overlying layer and proceed to the breaking down of the chamber reserves.

At the first stage, the ore mass is blasted with the formation of a separation pillar 4, which protects the chamber being worked off from the entry of previously fractured rocks. Repulsed rock mass released from the chamber through the exhaust workings I. At the same time in the chamber they form a goaf.

At the second stage of testing, the separating rear sight 4 is beaten off and the broken mountain mass is released.

After the separation pillar 4 has been blasted out, the loose rock 5 rushes into the developed chamber 6 in the overlying bed 7 of the overlying chamber, forming a support from the side of the overlying chamber.

Then from the excavation, passed in the side of the wall than the side, the overlying mass is filled

boreholes and turn the enclosing rocks onto the cut-off slot to form a support from the side of the underlying Kamrra.

Thus, the roof of the developed space is supported on the side of the chambers adjacent in height.

When determining the parameters of the cameras, their length is taken such that the entire span of the chamber along with the separation is entirely equal to the maximum span of the stability of the exposed rocks. In this case, after the separation pillar 4 is crushed, no overburden of the overburden occurs.

In order to ensure that the separation pillar that has been formed from the support on the side of the overlying chamber is reliable, after breakdown, it is necessary to have a sufficient number of magnetized loosened rocks in the developed chamber space. At the same time, in order not to affect the selected camera parameters, i.e. for the length of the chambers to remain consistently equal to the maximum span of the stability of the exposed rocks and not to self-destruct the thickness of the hanging rocks, it is necessary for the width of the developed 5 space of chamber 6 to be equal to the width of the separation rear sight 4.

The height (hj) of the split slit 3 in the overlying thickness is determined by the formula

L K, -WgWf- - 1Ti

    tf + ts tf- + il and where -w- ore body thickness, m; C the length of the rear sight, m; If - angle of fall of the ore body, hail; (- angle of repose, hail; Kp - coefficient of loosening, the proportion of units; - 5} (coefficient taking into account the need to increase the volume of loosened rocks {Kz 1.1 -1.2).

Claims (1)

Invention Formula Q A method for developing inclined ore bodies, which includes penetration of preparatory-rifled openings, breaking down chamber reserves in a descending order with the formation of a separation pillar between the chamber’s developed space and collapsed 5 rocks, the release of rock mass broken off in the chamber, the breaking of the separation column, the release of rock mass broken off from the column, and the collapse of the overlying layer, characterized in that, in order to prevent failures , on the earth's surface, due to the localization of the zone of collapse, before the cutting of chamber stocks in the overlying depth at the lower boundary of the chamber, a split slit is formed by angle of displacement of rocks, and the overburden is crushed by breaking rocks from the side of the worked space of the chamber with the formation of width, equal to the width of the separation pillar. 0 7 (rig. (fJi / e.Z