SU1642034A2 - Method of enhancing stability of rock body - Google Patents

Abstract

The invention relates to the mining industry. The goal is to increase the safety of rocks by reducing the likelihood of a collapse of a bookmark from the under-roofing layer. To do this, when developing the base layer of a powerful gently sloping pvflHoro body, vertical coaxial wells 3 are drilled from the generation into the roof and soil. In each pair of coaxial wells 3, one anchor is installed (A) 6 from the rope. Equip A 6 knots of ductility. The latter are placed on the soil of the roofing layer. The compliance unit is made by forming loops 7 on a rope and fastening its ends folded together by means of a metal clip 8. At the station A 6, the production is filled with a concrete block 9. When the ore is excavated in layers in the ascending order A 6, the availability of the node is lengthened with a given resistance mode. This eliminates the transfer of critical loads on the concrete laying 9 and reduces the likelihood of its collapse. 1 h. item f-ly, 2 ill.

Description

The invention relates to the mining industry.

The purpose of the invention is to increase the safety of mining, by reducing the likelihood of collapse of the bookmark from the subroofing layer.

In FIG. 1 shows a diagram of a mining of an ore body; - on fig .. '2 - node I in fig. 1.

The technology of the method is as follows.

When working out the subroofing layer 1 of a powerful gently dipping ore body, vertical wells 3 are drilled from a mine 2 into roof 4 and soil 5. Each pair of wells 3 drilled in roof 4 and soil 5 is aligned. In each pair of coaxial wells 3, one anchor 6 intersecting the production 2 is installed, made of steel or synthetic rope. The rope anchors 6 are equipped with ductility units, which are placed on the soil 5 of the subroofing layer 1. The ductility node is made by forming a loop 7 on the rope and fastening its ends together together by means of a metal clamp 8. After installing the anchors 6 and filling the wells 3 with quick-hardening mass, the production 2 is filled with concrete 9. Before laying workings 2 in order to create a preliminary tension of the anchors 6, adjacent anchors are interconnected using horizontal rods in the form of rope segments (not shown) . After installing the anchors and creating a leading floor from the concrete pad 9, the ore mass is excavated in the soil 5 by a ceiling-mounted or layered development system in an ascending order.

When the ore mass is excavated under a concrete deposit with 9 layers in an ascending order with a tab, the treatment works are carried out under the protection of a previously anchored precautionary stratum.

When ore is removed by layers in an ascending order, the processes of ore 10 displacement in the roof of layer 11 occur, as a result of which the load on the anchor 6 increases. If there is a ductility node located between the ore mass and the concrete filling, the anchor 6 is extended with a given resistance mode, which eliminates the transfer of critical loads on the concrete filling 9. With ₁₅ excavation of ore 10 directly under the laying 9, the probability of its collapse is reduced, which increases the safety of mining.

The size of the loop 7 is selected on the basis of ensuring the necessary flexibility of the cable anchors.

Claims (2)

Claim 1. A way to increase the stability of the massif according to ed. St. No. 1219814, characterized in that, in order to increase safety and mining operations by reducing the likelihood of collapse of the bookmark from the subroofing layer, rope anchors are equipped with ductility units that are placed on the soil of the subroofing layer before its 2Q laying. 2. The method according to π. 1, characterized in that the compliance node is made by forming a loop on the rope and fastening its ends together together by means of a clamp.